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INDONESIA
JURNAL TEKNOLOGI LINGKUNGAN
Published by Badan Pengkajian dan Penerapan Teknologi
ISSN : 1411318X     EISSN : 25486101     DOI : -
Core Subject : Social,
Environmental Science
Jurnal Teknologi Lingkungan (JTL) is a journal aims to be a peer-reviewed platform and an authoritative source of information. JTL is published twice annually and provide scientific publication for researchers, engineers, practitioners, academicians, and observers in the field related to science and environmental technology. We publish original research papers, review articles and case studies focused on Environmental Sciences, Environmental Technology as well as other related topics to Environment including sanitation, environmental biology, waste water treatment, solid waste treatment, environmental design and management, environmental impact assessment, environmental pollution control and environmental conservation.
Arjuna Subject : -
Articles 1,211 Documents
 116   117   118   119   120 
STRUKTUR DAN KOMPOSISI VEGETASI POHON SERTA ESTIMASI BIOMASSA, KANDUNGAN KARBON DAN LAJU FOTOSINTESIS DI TAMAN NASIONAL GUNUNG HALIMUN-SALAK Muhammad Mansur; Nuril Hidayati; Titi Juhaeti
Jurnal Teknologi Lingkungan Vol. 12 No. 2 (2011)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (233.014 KB) | DOI: 10.29122/jtl.v12i2.1248

Abstract

Research the structure and composition of vegetation, biomass estimation, carbon content and the rate of photosynthesis was conducted in Citalahab Central Village,Gunung Halimun-Salak National Park, West Java, on August 2010. The purpose of research to determine the components and characteristics of each tree species at the study sites associated with biomass, the rate of CO2 assimilation and transpiration. Results showed that, the form of classified forest area of primary forest with a little disturbed. There were recorded 337 individual trees (stem diameter > 10 cm) per hectare from 71 species, 50 genera and 32 families. Lauraceae, Fagaceae, Myrtaceae, Rubiaceae and Meliaceae are the 5 most common families found in the plot area, thatis dominated by Altingia excelsa, Blumeodendron elateriospermum, Ardisia zollingeri, Gordonia excelsa, Tricalysia singularis, Castanopsis acuminatissima, Knema cinerea, Laportea stimulant, Vernonia arborea and Dysoxylum excelsum. Estimated biomass recorded of 304.5 tons dry weight / ha with a carbon content of 152.3 tons / ha of basal area of 28.89 m2/ha. Quercus oidocarpa, Litsea noronhae, Saurauia nudiflora, Castanopsis argentea and Altingia excelsa has recorded the highest photosyntheticrates compared with other species. While the highest transpiration rate is owned by the Macaranga triloba, Sandoricum koetjape, Prunus arborea, Urophyllum corymbosum and Altingia excelsa.
Mikorizoremediasi: Asosiasi Fungi Mikoriza Arbuskula dalam Meningkatkan Kemampuan Penyerapan Logam pada Tanaman Hiperakumulator di Lahan Pertambangan: Mycorizoremediation: Association of Arbuscular Mycorrhizal Fungi to Increase Metal Absorption Ability in Hyperaccumulator Plants at Mining Land FERNANDO CHRISTOFER; SIORATNA PUSPITA SARI; KATRINA SAPULETTE; MELISA ANGGAYNI; ELISABETH HUTAGALUNG; WAHYU IRAWATI
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.069 KB) | DOI: 10.29122/jtl.v23i1.4584

Abstract

ABSTRACT Post-mining land has the characteristics of hard soil and toxic because it has been contaminated by heavy metal wastes, such as As, B, Cd, Cu, Hg, Mo, Ni, Pb, Se, and Zn. This condition makes it unplantable and dangerous for the survival of living things, so it requires reclamation to restore its condition. One practical solution that applies as the reclamation is using mycorrhizoremediation technology. This technology utilizes the association of hyperaccumulator plants with arbuscular mycorrhizal fungi to absorb metals in post-mining land. This paper aims to examine the mechanism and increase metal absorption ability in hyperaccumulator plants associated with the fungi in post-mining land. The method used in this research was the literature review method. The results of this study are the secondary data that successfully proves the use of mycorrhizoremediation as one of the solutions from the post-mining land reclamation effort. Arbuscular mycorrhizal fungi had the potential to increase the ability and effectiveness of metal absorption in hyperaccumulator plants. It helps plants expand the root absorption area by absorbing heavy metals, water, and other nutrients by colonizing plant roots. Further research is suggested to assess the effectiveness of hyperaccumulator plant vegetation density associated with the fungi in a post-mining area. Keywords: Arbuscular mycorrhizal fungi, Hyperaccumulator plants, Metal absorption, Mycorizoremediation, Post-mining land ABSTRAK Lahan pascatambang memiliki karakteristik tanah yang keras dan bersifat toksik, karena telah tercemar limbah logam berat seperti As, B, Cd, Cu, Hg, Mo, Ni, Pb, Se, dan Zn. Kondisi tersebut membuat lahan pascatambang menjadi lahan yang tidak dapat ditanami tanaman dan berbahaya bagi keberlangsungan makhluk hidup, sehingga memerlukan upaya reklamasi untuk memulihkan kondisi tanah. Salah satu solusi efektif yang dapat digunakan sebagai upaya reklamasi lahan pascatambang adalah dengan menerapkan teknologi mikorizoremediasi. Teknologi tersebut memanfaatkan asosiasi tanaman hiperakumulator dengan fungi mikoriza arbukular untuk menyerap logam yang berada di lahan pascatambang. Makalah ini bertujuan untuk mengkaji mekanisme dan peningkatan kemampuan penyerapan logam pada tanaman hiperakumulator yang berasosiasi dengan fungi mikoriza arbuskula di lahan pascatambang. Metode penulisan makalah ini adalah kajian literatur. Hasil temuan dari makalah ini adalah kumpulan data sekunder yang membuktikan keberhasilan pemanfaatan mikorizoremediasi sebagai salah satu solusi dari upaya reklamasi lahan pascatambang. Fungi mikoriza arbuskula memiliki potensi untuk meningkatkan kemampuan dan efektivitas penyerapan logam pada tanaman hiperakumulator. Fungi mikoriza arbuskula membantu tanaman untuk memperluas wilayah penyerapan akar dalam menyerap logam berat, air, dan unsur hara lainnya dengan mengolonisasi akar tanaman. Kajian berikutnya disarankan dapat mengkaji efektivitas kerapatan vegetasi tanaman hiperakumulator yang berasosiasi dengan fungi mikoriza arbuskula pada suatu lahan pascatambang. Kata kunci: Fungi mikoriza arbuskula, Lahan pascatambang, Mikorizoremediasi, Penyerapan logam, Tanaman hiperakumulator 
Pemantauan Kualitas Udara Ambien di Komplek Universitas Pertamina pada Masa Pandemi COVID-19: Monitoring of Ambient Air Quality in Universitas Pertamina Areas during the COVID-19 Pandemic NURULBAITI LISTYENDAH ZAHRA; FIKRI ABDURRAHMAN HAIDAR; YASMIN HANUM; DELAFANY RAMADHANTI; RIZKI RAMADHAN; ARI RAHMAN; FATIMAH DINAN QONITAN; BETANTI RIDHOSARI
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.913 KB) | DOI: 10.29122/jtl.v23i1.4597

Abstract

ABSTRACT The increasing number of vehicles in Jakarta has the potential to increase air pollution, especially on protocol roads. However, during the COVID-19 pandemic, large-scale social restrictions (PSBB) were imposed in Jakarta, which made work activities and learning processes carried out online. These social restrictions cause a decrease in vehicle activity, including at Universitas Pertamina Areas in Jakarta. The decreasing number of this activity certainly affects the ambient air quality. Therefore, ambient air quality measurements were conducted at Universitas Pertamina Areas during the COVID-19 pandemic. The parameters observed included SO2, NO2, O3, TSP, PM2.5, and NH3. This research showed that during the COVID-19 pandemic, the measured air parameters, namely SO2, NO2, O3, TSP, and PM2.5, met the quality standards based on the Government Regulation of the Republic of Indonesia Number 41 of 1999 concerning air pollution control. Also, NH3 parameters had met the Decree Minister of Environment Number: KEP-50/MENLH/11/1996 concerning odor level standards. Keywords: COVID-19 Pandemic, Gas, South Jakarta, Air Quality, Particulate   ABSTRAK Peningkatan jumlah kendaraan bermotor di Kota Jakarta berpotensi dalam meningkatkan pencemaranudara, terutama di jalan-jalan protokol. Namun, selama pandemi COVID-19 diberlakukan pembatasan sosial berskala besar (PSBB) di Kota Jakarta yang membuat kegiatan kerja dan proses pembelajaran dilakukan secara daring sehingga aktivitas kendaraan bermotor mengalami penurunan, termasuk di Komplek Universitas Pertamina Jakarta. Penurunan aktivitas ini berpengaruh terhadap kualitas udara ambien. Oleh karena itu dilakukan pengukuran terhadap kualitas udara ambien di Universitas Pertamina selama pandemi COVID-19. Parameter yang diamati meliputi SO2, NO2, O3, TSP, PM2,5, dan NH3. Dari hasil pemantauan dapat disimpulkan bahwa pada saat pandemi, parameter udara yang diukur, yaitu SO2, NO2, O3, TSP, dan PM2,5 memenuhi baku mutu berdasarkan Peraturan Pemerintah Republik Indonesia Nomor 41 Tahun 1999 tentang pengendalian pencemaran udara dan parameter NH3 telah memenuhi Keputusan Menteri Lingkungan Hidup Nomor: KEP50/MENLH/11/1996 tentang baku tingkat kebauan. Kata kunci: Pandemi COVID-19, Gas, Jakarta Selatan, Kualitas Udara, Partikulat    
Studi Pendahuluan Pemanfaatan Sludge IPAL Industri Tekstil Sebagai Bahan Baku Briket: Study of Utilization Textile Industry Sludge from WWTP as Raw Material for Briquettes RAHMAULINA, DINI; HARTATI, ETIH; MARGANINGRUM, DYAH
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.739 KB) | DOI: 10.29122/jtl.v23i1.4639

Abstract

ABSTRACT The sludge textile industry was a by-product from wastewater treatment plant (WWTP) categorized as toxic and hazardous waste, sludge (SL) produced every day from WWTP could cause problems in the factory environment, such as reducing the storage space and aesthetic of the factory environment. This study discussed sludge that will be used as raw materials for briquettes. The analysis of the study was based on proximate analysis, calorific value, total sulfur, heavy metals, and slagging and fouling potential, which used method ASTM, AAS, Spectrophotometry and Gravimetry. These sludge briquettes materials were also added with additional raw material: bottom ash (BA); afterwards, it was mixed with sludge, and the compositions were 90%BA:10%SL, 80%BA:20%SL, and 70%BA:30%SL. The characteristic quality of briquettes was compared to Ministry of Environmental Regulation Number 06 of 2021 and Indonesia National Standard Number 4931 of 2010. The analysis of sludge material for briquette had moisture content, ash content, volatile matter, fixed carbon, calorific value, and total sulfur of 2.57%, 7.92%, 4.76%, 13.47%, 1,172 kcal/kg, and 0.98%, respectively. In addition, the slagging and fouling potential indicated moderate and low classification with the impact value index of 0.310 and 0.412, respectively. The study results also showed that the best briquette was a briquette that uses a composition of 70%BA:30%SL. This briquette had a calorific value of 1,473 kcal/kg; however, it has not met the provisions of the Ministry of Environmental and Forestry Regulation Number 06 of 2021 and Indonesia National Standard Number 4931 of 2010.   ABSTRAK Sludge Industri Tekstil merupakan hasil samping dari proses Instalasi Pengolahan Air Limbah (IPAL) yang tergolong ke dalam limbah B3, sludge (SL) yang dihasilkan dari IPAL dapat menimbulkan masalah berupa berkurangnya ruang penyimpanan sludge serta menganggu estetika lingkungan pabrik. Studi ini membahas sludge yang selanjutnya akan digunakan sebagai bahan baku bahan bakar briket. Analisis studi yang akan dikaji yaitu analisis proksimat, nilai kalor, total sulfur, kandungan logam berat serta potensi terjadinya slagging dan fouling menggunakan metode ASTM, AAS, Spektrofotometri serta Gravimetri. Briket berbahan baku sludge kemudian ditambahkan bahan baku tambahan berupa bottom ash (BA) yang kemudian dicampur dengan sludge pada komposisi 90%BA:10%SL, 80%BA:20%SL, dan 70%BA:30%SL. Kualitas briket tersebut dibandingkan dengan Peraturan Menteri Lingkungan Hidup No 06 Tahun 2021 dan SNI 4931 Tahun 2010. Berdasarkan studi yang dilakukan sludge memiliki kandungan kadar air, kadar abu, volatile matter, fixed carbon, nilai kalor, dan total sulfur secara berturut-turut 2,57%, 79,2%, 4,76%, 13,47%, 1.172 kkal/kg dan 0,98%. Selain itu penggunaan sludge terhadap potensi slagging dan fouling terindikasi sedang dan rendah dengan indeks secara berturut-turut 0,310 dan 0,412. Berdasarkan studi, briket terbaik terdapat pada briket dengan komposisi 70%BA:30%SL dengan nilai kalor sebesar 1.473 kkal/kg namun briket tersebut masih belum memenuhi kualitas yang diharapkan berdasarkan Peraturan Menteri Lingkungan Hidup dan Kehutanan Nomor 06 Tahun 2021 dan SNI 4931 Tahun 2010.
Laju Degradasi Beberapa Jenis Plastik Menggunakan Ulat Hongkong (Tenebrio molitor L.) dan Ulat Jerman (Zophobas atratus F.): Degradation Rate of Several Plastics Type Using Mealworm (Tenebrio molitor L.) and Germany Superworm (Zophobas atratus F.) INDRA PUTRA, ICHSAN LUQMANA; MA’RUFAH, NILA
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (406.626 KB) | DOI: 10.29122/jtl.v23i1.4735

Abstract

ABSTRACT Excessive consumption of plastic material causes a higher amount of plastic waste, which causes environmental pollution. This study aims to determine the degradation rate of several types of plastics using Tenebrio molitor and Zophobas atratus in the laboratory. The research was conducted from September 2020–March 2021 at the Ecology and Systematic Laboratory, Faculty of Applied Science and Technology, Ahmad Dahlan University, Yogyakarta. The study used 10 of the 6th instar caterpillars with five repetitions. The treatment was used three types of plastic samples, namely: Polypropylene (PP), High-Density Polyethylene (HDPE) and Low-Density Polyethylene (LDPE), each of which was given as much as 1 gram. The control treatment was given 1 gram of bran feed. Each caterpillar was measured for its body weight and length every three days and carried out for 30 days. The data results were analyzed statistically inferential at the 5% confidence level. The parameters observed were the increase in length and weight of T. molitor and Z. atratus, degradation rate, and the Waste Reduction Index (WRI). The highest average length value for larvae was T. molitor HDPE plastic (1.83 cm), and the lowest was LDPE (1.41 cm), while body weight measurements showed constant weight values (0.07 gr). Size of the length of larvae Z. atratus showed the highest average body length value for LDPE plastic (3.70 cm) and the lowest in control (3.46 cm), while the weight gain showed an average range of 0.41–0.43 grams. The counting of values of degradation rate and WRI obtained the highest to lowest results, respectively, namely, control (0.075), PP (0.011), LDPE (0.009), and HDPE (0.007) in T. molitor. While the values of degradation rate and WRI in Z. atratus were control (0.038), PP (0.032), LDPE (0.014), and HDPE (0.004). For the WRI, in T. molitor, the highest was control (2.51%), and lowest was HDPE (0.22%), while in Z. atratus, the highest was control (1.26%), and lowest was HDPE (0.12%). Keywords: Degradation, HDPE, LDPE, Tenebrio molitor, Zophobas atratus ABSTRAK Konsumsi berlebih terhadap bahan plastik mengakibatkan jumlah sampah plastik semakin tinggi sehingga menyebabkan pencemaran lingkungan. Oleh karena itu, perlu adanya sebuah upaya untuk mengurangi sampah plastik secara alami. Penelitian ini bertujuan mengetahui laju degradasi beberapa jenis plastik menggunakan ulat hongkong (Tenebrio molitor L.) dan ulat jerman (Zophobas atratus F.) di Laboratorium. Penelitian dilaksanakan September 2020–Maret 2021 di Laboratorium Ekologi dan Sistematik, Fakultas Sains dan Teknologi Terapan, Universitas Ahmad Dahlan, Yogyakarta. Plastik yang digunakan yaitu Polypropylene (PP), High-Density Polyethylene (HDPE), dan Low-Density Polyethylene (LDPE) masing-masing sebanyak 1 gram. Perlakuan kontrol diberikan pakan dedak sebanyak 1 gram. Setiap ulat diukur bobot dan panjang tubuhnya setiap 3 hari sekali selama 30 hari. Hasil data yang diperoleh dianalisis secara statistik inferensial pada taraf kepercayaan 5%. Parameter yang diamati yaitu pertambahan panjang dan bobot larva, laju degradasi, dan waste reduction indeks (WRI). Nilai rerata panjang tertinggi T. molitor adalah HDPE (1,83 cm) dan terendah LDPE (1,41 cm). Pengukuran bobot tubuh menunjukkan nilai bobot yang seragam (0,07 gr). Pengukuran Z. atratus menunjukkan nilai rata-rata panjang tubuh tertinggi pada LDPE (3,70 cm) dan terendah pada HDPE (3,49 cm). Pertambahan bobot menunjukkan rata-rata berkisar antara 0,41–0,43 gram. Perhitungan nilai laju degradasi tertinggi dan terendah yaitu PP (0,011) dan HDPE (0,007) pada T. molitor. Perhitungan nilai laju degradasi tertinggi dan terendah pada Z. atratus adalah PP (0,032) dan HDPE (0,004). Nilai WRI tertinggi dan terendah pada T. molitor yaitu PP (0,36%) dan HDPE (0,22%), sedangkan pada Z. atratus  yaitu pakan PP (1,08%) dan HDPE (0,12%). Kata kunci: Degradasi, HDPE, LDPE, Tenebrio molitor, Zophobas atratus
Karakteristik Bahan Bakar Minyak dari Limbah Plastik dan Aplikasinya pada Motor Bensin Empat Langkah: Characteristics of Fuel Oil from Plastic Waste and Its Application on Four Stroke Gasoline Engine AMIRAL AZIS; IRFAN SUSANTO
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.404 KB) | DOI: 10.29122/jtl.v23i1.4752

Abstract

ABSTRACT Plastic is one of the materials most widely used by the community, especially in the household sector. The use of plastics that are not in accordance with health and environmental standards will cause various health problems and pollution to the environment Plastic can be converted by pyrolysis process to produce liquid fuel as an alternative fuel for Internal Combustion Engine (ICE). The purpose of this research was to compare the performance parameters of the four-stroke gasoline engine single cylinder using the mixture of plastic oil (MIPLAS) as testing fuels and 2 (two) Pertamina’s products, ie. Pertalite which has RON (Research Octane Number) 90 and Pertamax which has RON (Research Octane Number) 92 as comparative fuels. The first phase of this research used a dynamometer machine with testing using 100% each Pertalite (RON 90), Pertamax (RON 92) and MIPLAS. The engine performance parameters such as Brake Power, Specific Fuel Consumption, Brake Mean Effective Pressure and Engine Speed were investigated. Then the second phase of testing using the mixture of plastic oil (MIPLAS) and Pertalite (RON 90), Pertamax (RON 92) with a certain percentage as the fuel. From the research results for all types of fuels and fuel mixtures, the minimum specific fuel consumption (SFC) does not occur at the maximum Brake Power (BP) generated., this means that the Internal Combustion Engine never occurs in a condition of maximum power generated with minimum specific fuel consumption or vice versa. It can be concluded that the design and operation of an ICE is a trade-off between the maximum Brake Power (BP) generated and the minimum Specific Fuel Consumption (SFC). Keywords: gasoline engine, pertamax, pertalite, plastic oil, performance parameter   ABSTRAK Plastik merupakan salah satu bahan yang paling banyak digunakan oleh masyarakat, khususnya dalam sektor rumah tangga. Penggunaan plastik yang tidak sesuai standar kesehatan dan lingkungan hidup akan menimbulkan berbagai gangguan kesehatan dan pencemaran terhadap lingkungan. Plastik dapat diubah melalui proses pirolisis untuk menghasilkan bahan bakar cair sebagai bahan bakar alternatif motor bakar bensin (Internal Combustion Engine). Tujuan dari penelitian ini adalah untuk membandingkan parameter unjuk kerja motor bakar bensin empat langkah silinder tunggal dengan bahan bakar campuran minyak plastik (MIPLAS) dan 2 (dua) produk Pertamina yaitu. Pertalite yang memiliki RON (Research Octane Number) 90 dan Pertamax yang memiliki RON (Research Octane Number) 92 sebagai bahan bakar pembanding Tahap pertama penelitian ini menggunakan mesin dinamometer dengan pengujian menggunakan 100% Pertalite (RON 90), 100 % Pertamax (RON 92) dan 100 % MIPLAS. Parameter kinerja mesin seperti Daya Efektif (Brake Power) Konsumsi Bahan Bakar Spesifik (Specific Fuel Consumption), Tekanan Efektif Rata-rata (Brake Mean Effective Pressure) dan putaran mesin diinvestigasi. Kemudian pengujian tahap kedua menggunakan campuran minyak plastik (MIPLAS) dan Pertalite (RON 90), MIPLAS dan Pertamax (RON 92) dengan persentase tertentu sebagai bahan bakarnya. Dari hasil penelitian untuk semua jenis bahan bakar dan campuran bahan bakar, konsumsi bahan bakar spesifik (Specific Fuel Consumption) minimum tidak terjadi pada daya efektif (Brake Power) maksimum yang dihasilkan, hal ini berarti bahwa pada motor bakar tidak pernah terjadi kondisi dimana daya yang dihasilkan maksimum dengan konsumsi bahan bakar spesifik minimum atau sebaliknya. Dapat disimpulkan bahwa desain dan pengoperasian motor bakar (Internal Combustion Engine) merupakan trade-off antara daya efektif maksimum (Brake Power) yang dihasilkan dan konsumsi bahan bakar spesifik (Specific Fuel Consumption) minimum. Kata kunci: motor bakar bensin, pertamax, pertalite, minyak plastik, parameter kinerja
Pemanfaatan Limbah Spent Bleaching Earth (SBE) untuk Beton Ringan sebagai Material Konstruksi yang Ramah Lingkungan: Utilization of Spent Bleaching Earth (SBE) Waste for Lightweight Concrete as Ecofriendly Construction Materials AGUNG SUMARNO; AGUS MUDO PRASETYO
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.258 KB) | DOI: 10.29122/jtl.v23i1.4766

Abstract

ABSTRACT Lightweight concrete as a non-structural construction material to replace brick is commonly used because it has a lighter mass and is more practical in installation. This research utilizes Spent Bleaching Earth (SBE) waste as a substitute for sand in the manufacture of lightweight concrete using the Non-Autoclaved Aerated Concrete (NAAC) method with variations in the addition of Al as aerating compounds (0.20% and 0.25% by mass of cement). The NAAC method was chosen because the process is more energy-efficient when compared to the Autoclaved Aerated Concrete (AAC) method. The alkalinity of this lightweight concrete mixture is controlled by adding lime to a certain amount. In the sample with an Al content of 0.20%, the minimum density results were obtained 785.95 kg/m3 (B0A) and a maximum of 1,313.73 kg/m3 (B5A). In contrast, Al content of 0.25% the minimum density results was obtained 781.37 kg/m3 (B0B) and maximum 1,256.89 kg/m3 (B5B). Measurement of water absorption in the sample with an Al content of 0.20% obtained a minimum result of 2.51% (B5A) and a maximum of 40.74% (B0A). Meanwhile, the sample with an Al content of 0.25% obtained a minimum yield of 2.91% (B5B) and a maximum of 43.97% (B0B). Compressive strength calculation of concrete with 28 days old in a sample with an Al content of 0.20%, a minimum result of 1.15 MPa (B0A) and a maximum of 2.95MPa (B5A) is obtained, whereas for a sample with an Al content of 0.25%, a minimum result of 0.77 MPa (B0B) and a maximum of 2.43 Mpa (B5B) is obtained. The flexural strength of lightweight concrete, aged 28 days in samples with 0.20% Al content, obtained a minimum result of 0.67 MPa (B0A) and a maximum of 1.31 MPa (B3A). In contrast, samples with an Al content of 0.25% obtained a minimum of 0.73 MPa (B0B) and a maximum of 1.28 MPa (B3B). Keywords : Lightweight concrete, NAAC, Spent Bleaching Earth, Ecofriendly ABSTRAK Pemanfaatan beton ringan sebagai material konstruksi non struktural pengganti batu bata merah sudah sangat umum digunakan karena memiliki massa yang lebih ringan dan lebih praktis dalam pemasangan. Penelitian ini memanfaatkan limbah Spent Bleaching Earth (SBE) sebagai pengganti pasir dalam pembuatan beton ringan menggunakan metode Non Autoclaved Aerated Concrete (NAAC) dengan variasi penambahan senyawa pengaerasi Al (0,20% dan 0,25% berat semen).  Metode NAAC dipilih karena prosesnya lebih hemat energi bila dibandingkan dengan metode Autoclaved Aerated Concrete (AAC). Alkalinitas campuran beton ringan ini dikontrol dengan penambahan kapur sampai jumlah tertentu. Pada sampel dengan kadar Al 0,20% diperoleh hasil densitas minimal 785,95 kg/m3 (B0A) dan maksimal 1.313,73 kg/m3 (B5A) sedangkan pada kadar Al 0,25% diperoleh hasil densitas minimal 781,37 kg/m3 (B0B) dan maksimal 1.256,89 kg/m3 (B5B). Pengukuran penyerapan air pada sampel dengan kadar Al 0,20% diperoleh hasil minimal 2,51% (B5A) dan maksimal 40,74% (B0A), sedangkan pada sampel dengan kadar Al 0,25% diperoleh hasil minimal 2,91% (B5B) dan maksimal 43,97% (B0B). Perhitungan kuat tekan beton umur 28 hari pada sampel dengan kadar Al 0,20% diperoleh hasil minimal 1,15 MPa (B0A) dan maksimal 2,95 MPa (B5A), sedangkan pada sampel dengan kadar Al 0,25% diperoleh hasil minimal 0,77 MPa (B0B) dan maksimal 2,43 Mpa (B5B). Kuat lentur beton ringan umur 28 hari pada sampel dengan kadar Al 0,20% diperoleh hasil minimal 0,67 MPa (B0A) dan maksimal 1,31 MPa (B3A), sedangkan pada sampel dengan kadar Al 0,25% diperoleh hasil minimal 0,73 MPa (B0B) dan maksimal 1,28 MPa (B3B). Kata Kunci : Beton Ringan, NAAC, Spent Bleaching Earth, Ramah Lingkungan
Analisis Potensi Pencemaran Air Tanah Bebas di Lereng Kaki Koluvial dan Dataran Aluvial Daerah Aliran Sungai Pesing Menggunakan Integrasi Metode GOD dan SIG Berbasis Web: Analysis of Potential Groundwater Pollution in Unconfined Aquifer in Colluvial Footslopes and Alluvial Plains of the Pesing Watershed Using Integration of GOD and GIS Web Based Methods SEJATI, SADEWA PURBA; SAPUTRA, ADITYA
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (570.217 KB) | DOI: 10.29122/jtl.v23i1.4949

Abstract

ABSTRACT Agricultural, livestock, and domestic activities in the alluvial plains and the colluvial footslopes of the Pesing watershed have the potential to reduce groundwater quality in an unconfined aquifer. Environmental characteristics need to be identified spatially to determine the potential for groundwater contamination. The latest mapping technology also needs to be identified to determine its ability to disseminate information on potential groundwater pollution. The research was conducted to determine the potential for groundwater pollution and to identify the capability of a web-based GIS as a medium for disseminating geospatial information. Potential groundwater contamination was identified using the GOD method. The variables used include the type of aquifer, aquifer lithology, and groundwater depth. Variables of aquifer type and aquifer lithology are known through secondary data, namely drilling data, geological data, and literature studies. Variable groundwater depth is known through field surveys. Sampling method used is systematic random sampling. Each variable is classified and visualized in the form of a thematic map. Three variables were analyzed by the overlay method. Based on the results of the analysis, it is known that in the rainy season, the research area is classified into three classes of potential for groundwater pollution, namely extreme potential with a percentage of 27% area, high potential with a rate of 71%, and medium potential with a percentage of 2%. The potential for groundwater contamination during the dry season is classified into two classes: high potential with an area of 43% and medium potential with a percentage of 57%. Temporal dynamics of the potential for groundwater pollution are caused by a variable sensitive to seasonal changes, namely the depth of groundwater. The land uses that have the most influence on the potential for groundwater contamination are rice fields and livestock manure disposal. Web-based GIS can be used as a medium for disseminating information on potential groundwater pollution. The program can be appropriately operated on a variety of electronic devices. Web-based GIS is equipped with a variety of features that can be used interactively for fundamental to applied analysis. Keywords: groundwater, unconfined aquifer, GOD, GIS, web   ABSTRAK Aktivitas pertanian, peternakan, dan domestik di dataran aluvial dan dataran kaki koluvial DAS Pesing berpotensi menurunkan kualitas air tanah bebas. Karakteristik lingkungan perlu diidentifikasi secara spasial untuk mengetahui potensi pencemaran air tanah. Teknologi pemetaan terkini juga perlu diidentifikasi untuk mengetahui kemampuannya dalam mendiseminasi informasi potensi pencemaran air tanah. Penelitian dilakukan untuk mengetahui potensi pencemaran air tanah dan mengidentifikasi kemampuan sistem informasi geografis berbasis (SIG) web sebagai media diseminasi informasi geospasial. Potensi pencemaran air tanah diidentifikasi menggunakan metode GOD (groundwater occurrence, overall lithology of aquifer, depth to water table). Variabel yang digunakan meliputi jenis akuifer, litologi akuifer, dan kedalaman air tanah. Variabel jenis akuifer dan litologi akuifer diketahui melalui data sekunder, yaitu data pengeboran, data geologi, dan studi literatur. Variabel kedalaman air tanah diketahui melalui survei lapangan. Metode sampling yang digunakan adalah acak bersistem. Setiap variabel diklasifikasi dan divisualkan dalam bentuk peta tematik. Ketiga variabel dianalisis dengan metode overlay. Berdasarkan hasil analisis diketahui bahwa pada musim hujan daerah penelitian terklasifikasi menjadi tiga kelas potensi pencemaran air tanah bebas, yaitu potensi ekstrim dengan persentase luas 27%, potensi tinggi dengan persentase 71%, dan potensi sedang dengan persentase 2%. Potensi pencemaran air tanah pada musim kemarau terklasifikasi menjadi dua kelas, yaitu potensi tinggi dengan persentase luas 43% dan potensi sedang dengan persentase 57%. Dinamika temporal potensi pencemaran air tanah bebas disebabkan karena terdapat variabel yang sensitif terhadap perubahan musim, yaitu kedalaman air tanah. Penggunaan lahan yang paling berpengaruh terhadap potensi pencemaran air tanah adalah sawah dan lokasi pembuangan kotoran ternak. SIG berbasis web mampu digunakan sebagai media diseminasi informasi potensi pencemaran air tanah bebas. Program dapat dioperasikan dengan baik pada beragam perangkat elektronik. Program dilengkapi dengan beragam fitur yang dapat digunakan secara interaktif untuk analisis dasar hingga terapan. Kata kunci: air tanah, akuifer bebas, GOD, SIG, web
Pengaruh Variasi pH pada Penjerapan Kation Fe3+, Pb2+ Menggunakan Senyawa 5,11,17,23-tetra-(t-butil)-25,26,27,28-tetra-Hidroksi-Kaliks[4]arena sebagai Adsorben: Kajian Kapasitas Adsorpsi: Effect of pH Variations on Adsorption of Fe3+, Pb2+ Cations Using 5,11,17,23-tetra-(t-butyl)-25,26,27,28-tetra-Hydroxy-Calix[4]arene Compounds as Adsorbents: Adsorption Capacity Study BUSRONI BUSRONI; CHAIRIL ANWAR; DWI SISWANTA
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.395 KB) | DOI: 10.29122/jtl.v23i1.4962

Abstract

ABSTRACT Efforts to reduce the concentration of heavy metal cations in the environment have become a matter of concern due to their potential impact and widespread pollution in the waters. This study aims to examine the adsorption capacity of Pb(II) and Fe(III) cations using 5,11,17,23-tetra-(t-butyl)-25,26,27,28-tetra-hydroxycalix[4]arene compounds (TBKA) with various pH variations. The synthesis product of TBKA was characterized using FTIR and 1H-NMR spectroscopy. TBKA has functioned as an adsorbent or pollutant absorbent for Pb(II) and Fe(III) cation with an immersion system. The results showed that variations in pH affect the adsorption capacity of the adsorbent TBKA on Pb(II) and Fe(III) cations. The adsorption capacity of the adsorbent of TBKA on Pb(II) cations at pH 2; 3; 4; 5; and 6 was 6.32; 2.16; 4.14; 10.52; and 2.88 mg/g, respectively, while the adsorption capacity of TBKA on Fe(III) cations at pH 1.5; 3; 4; 5 and 6 was 8.4; 13.32; 11.6; 14.18; and 6.66 mg/g, respectively. Keywords: TBCA, Batch system, pH variations, Adsorption capacity   ABSTRAK Upaya untuk mengurangi konsentrasi kation logam berat di lingkungan telah menjadi perhatian sehubungan dengan dampak yang dapat ditimbulkan dan masih adanya pencemaran logam berat di perairan. Penelitian ini bertujuan untuk mengkaji kapasitas adsorpsi kation Pb(II) dan Fe(III) menggunakan senyawa 5,11,17,23-tetra-(t-butil)-25,26,27,28-tetra-hidroksikaliks[4]arena (TBKA) dengan berbagai variasi pH. Karakterisasi hasil sintesis TBKA dilakukan dengan menggunakan spektroskopi FTIR dan 1H-NMR. TBKA difungsikan sebagai adsorben atau penjerap polutan kation Pb(II) dan Fe(III)  dengan sistem perendaman. Hasil penelitian menunjukkan bahwa variasi pH berpengaruh terhadap kapasitas adsorpsi daya jerap antara adsorben TBKA terhadap kation Pb(II) dan kation Fe(III).  Kapasitas adsorpsi daya jerap antara adsorben TBKA terhadap kation Pb(II) pada pH 2; 3; 4; 5; dan 6 secara berturut turut adalah 6,32; 2,16; 4,14; 10,52; dan 2,88 mg/g, sedangkan kapasitas adsorpsi terhadap daya jerap antara TBKA terhadap kation Fe(III) pada pH 1,5; 3; 4; 5 dan 6 secara berturut turut adalah 8,4; 13,32; 11,6; 14,18; dan 6,66 mg/g. Kata kunci: TBKA, Rendam, Variasi pH, Kapasitas adsorpsi
Analysis of Potential GHG Emissions from Tofu Industry and Its Mitigation in Indonesia: Analisis Potensi Emisi Gas Rumah Kaca dari Industri Tahu dan Mitigasinya di Indonesia ARY MAULIVA HADA PUTRI; JOKO WALUYO
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (616.231 KB) | DOI: 10.29122/jtl.v23i1.4963

Abstract

ABSTRAK Tahu merupakan salah satu sumber protein dengan permintaan yang tinggi di Indonesia. Saat ini  beberapa industri tahu telah menggunakan peralatan-peralatan berbahan dasar stainless steel. Kondisi ini menunjukkan keseriusan industri tahu untuk membuat produk tahu yang higienis. Namun, produk tahu yang higienis saja tidaklah cukup. Persaingan pasar global menuntut sebuah produk tidak hanya memperhatikan kualitas, namun juga menjadi produk yang ramah lingkungan dengan ditandai oleh nilai emisi CO2 yang rendah. Sejalan dengan kondisi tersebut, maka studi terkait dengan perhitungan emisi CO2 yang dihasilkan oleh sebuah produk menjadi hal yang perlu diutamakan. Pada studi ini dilakukan penelitian estimasi emisi CO2 yang dihasilkan dari 1 kg tahu dengan menggunakan metode LCA dan menerapkan batasan sistem from cradle to gate, yakni penghitungan emisi Gas Rumah Kaca (GRK) dihitung dari penanaman kedelai hingga menjadi 1 kg produk tahu. Studi kasus dilakukan pada 3 industri tahu dan diketahui bahwa emisi GRK yang dihasilkan per 1 kg tahu berada pada rentang 0,35–0,5 kg CO2 eq. Faktor utama penyumbang emisi CO2 berasal dari air limbah hasil dari proses produksi, diikuti  budidaya kedelai dan transportasi bahan baku kedelai dari perkebunan menuju ke industri. Hasil penelitian ini memberikan rekomendasi kepada industri tahu untuk mengurangi emisi CO2 yang dihasilkan dari limbah cair proses produksi tahu. Alternatif pengolahan limbah cair yakni dengan mengolah air limbah menggunakan sistem anaerobik guna menghasilkan biogas yang digunakan untuk kebutuhan memasak. Kata kunci: Kedelai, Tahu, LCA, Emisi GRK, Limbah cair   ABSTRACT Tofu is one of the protein sources with high demand in Indonesia. Currently, several tofu industries have used stainless steel-based equipment. This condition shows the seriousness of the tofu industry to make hygienic tofu products. However, hygienic tofu products are not enough. The global market competition required the products to take notice not only of their quality but also of environmentally-friendly products characterized by a low value of CO2 emission. In accordance with the condition, studies related to calculating CO2 emissions resulting from a product are necessary. In this study, we conducted research on the estimation of CO2 emissions resulting from 1 kg of tofu using the LCA method and applying the system boundary from cradle to gate, in which greenhouse gas (GHG) emissions were calculated from soybeans plantation to 1 kg of tofu products. Case studies were conducted on three tofu industries, and it was found that the GHG emissions produced per 1 kg of tofu were in the range of 0.35–0.5 kg CO2 eq. Three main factors contribute to CO2 emissions, i.e., wastewater, soybean cultivation, and soybean transportation from plantation area to industry. Therefore, this study recommends the tofu industry reduce CO2 emissions resulting from wastewater. The alternative is to treat wastewater using an anaerobic system to produce biogas for cooking purposes. Keywords: Soybeans, Tofu, Life Cycle Assessment (LCA), GHG emissions, Wastewater

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