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PENGOLAHAN DAN OPTIMALISASI BIOPLASTIK BERBAHAN DASAR PATI SINGKONG Andre Anantama Irawan; Rizqi Puteri Mahyudin
Dampak Vol 18, No 1 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.18.1.7-10.2021

Biodegradable plastic is a type of plastic that can be broken down by microorganisms into water and carbon dioxide gas as its final products after it has been used and disposed of in the environment, without leaving behind any toxic residue. Due to its ability to return to nature, biodegradable plastic is considered an environmentally friendly material. Cassava peel, obtained from cassava plant products (Manihot Esculenta Cranz), is a major food waste in developing countries. As the cassava cultivation area expands, it is expected that the production of cassava tubers will increase, resulting in a higher amount of cassava peel waste. Typically, every kilogram of cassava can produce approximately 20% cassava peel waste. The relatively high starch content in cassava peel makes it suitable for the production of biodegradable plastic films.Keywords: Bioplastic, Biodegradable, Cassava Starch, Biotechnology.Â ABSTRAKÂ Plastik biodegradabel adalah plastik yang dapat terurai oleh aktivitas mikroorganisme menjadi hasil akhir berupa air dan gas karbondioksida, setelah habis terpakai dan dibuang ke lingkungan tanpa meninggalkan sisa yang beracun. Karena sifatnya yang dapat kembali ke alam, plastik biodegradabel merupakanbahan plastik yang ramah terhadap lingkungan. Kulit umbi singkong yang diperoleh dari produk tanaman singkong (Manihot Esculenta Cranz) merupakan limbah utama pangan di negara-negaraberkembang. Semakin luas areal tanaman singkong diharapkan produksi umbi yang dihasilkan semakin tinggi yang pada gilirannya semakin tinggi pula limbah kulit yang dihasilkan. Setiap kilogram singkong biasanya dapat menghasilkan 20% kulit umbi. Kandungan pati kulit singkong yang cukup tinggi, memungkinkan digunakan sebagai pembuatan film plastik biodegradasi.Â Kata kunci: Bioplastik, Biodegradabel, Pati Singkong, Bioteknologi

Identifikasi Pencemaran Limbah Di Sekitar TPA Antang Makassar Menggunakan Metode Geolistrik Resistivitas Mun’im, Abdul; Sappewali, Sappewali; Wahyuni, Ayusari
Dampak Vol 19, No 1 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.19.1.17-21.2022

The data presented in this paper are related to the characterization of a subsurface layer of TPA Antang, Makassar, South Sulawesi. The method used in this study is geo-electrical resistivity Wenner configuration by taking the data 3 lines in each region with lengths 150 m. Data processing used non-linear least square optimization with that of the 2D inversion software Res2Dinv. The results showed that the area was underlain by two layers of lithologic sections. The first layer with a resistivity value of 11.5 - 33.64 Ωm with a thickness ranging from 2-6 meters below the surface (original ground surface), was the sediment resulting from stockpiling dominated by silty sand sediment to sand based on field observation information. The second layer with a resistivity value of 3.02 - 11.5 Ωm with a depth ranging from 2 - 6 meters from the surface. The determination of this layer is based on information on well data and responses which indicate that this layer is swampy sediment, dominant sand ranging from sand alone to silty sand. The very small value of recessivity indicates that this layer is not compact sediment so the pore space between the grains was saturated. This layer is identified as a shallow aquifer. Based on the resistivity value, the fluid that filled this layer was divided into two types of fluids, fluids with a low resistivity value of 3.02 - 5.71 Ωm, it is assumed that the influence of leachate which is electrolytic makes it easy to flow electric current, and fluid with a resistivity value of 5.71 - 11.5 Ωm is a fluid that has not been contaminated with leachate. Keywords: Antang Landfill, geoelectric, groundwater, resistivity, waste ABSTRAKData yang disajikan dalam makalah ini terkait dengan karakterisasi lapisan bawah permukaan TPA Antang, Makassar, Sulawesi Selatan. Metode yang digunakan dalam penelitian ini adalah metode geolistrik resistivitas konfigurasi Wenner dengan mengambil data 3 jalur masing-masing daerah dengan panjang 150 m. Pemrosesan data menggunakan optimasi kuadrat terkecil non-linier dengan perangkat lunak inversi 2D Res2Dinv. Hasil penelitian menunjukkan bahwa daerah tersebut dilatarbelakangi oleh dua lapisan bagian litologi. Lapisan pertama dengan nilai resistivitas 11,5 - 33,64 m dengan ketebalan berkisar antara 2-6 meter di bawah permukaan (original ground surface), merupakan sedimen hasil penimbunan yang didominasi oleh sedimen pasir berlumpur hingga pasir berdasarkan informasi observasi lapangan. Lapisan kedua dengan nilai resistivitas 3,02 – 11,5 m dengan kedalaman berkisar antara 2 – 6 meter dari permukaan. Penentuan lapisan ini berdasarkan informasi data sumur dan respon yang menunjukkan bahwa lapisan ini merupakan sedimen berawa, dominan pasir mulai dari pasir saja sampai pasir berlumpur (silty sand). Nilai resesivitas yang sangat kecil menunjukkan lapisan ini merupakan sedimen yang tidak kompak sehingga ruang pori antar butir jenuh oleh air. Lapisan ini diidentifikasi sebagai akuifer dangkal. Berdasarkan nilai resistivitasnya, fluida yang mengisi lapisan ini terbagi menjadi dua jenis fluida yaitu fluida dengan nilai resistivitas rendah 3,02 – 5,71 m, diduga pengaruh lindi yang bersifat elektrolitik memudahkan aliran arus listrik dan fluida dengan nilai resistivitas 5,71 – 11,5 m merupakan fluida yang belum tercemar lindi. Kata kunci: TPA Antang, geolistrik, air tanah, resistivity, limbah

Pemanfaatan Limbah Fly Ash dan Spent Bleaching Earth sebagai Substitusi Semen pada Beton Mutu Normal Skala Produksi Nababan, Otto Lambok Raya; Iryani, Dewi Agustina; Wahono, Endro Prasetyo; Rinawati, Rinawati
Dampak Vol 20, No 2 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.20.2.93-99.2023

In the era of industry and technology in Indonesia, environmental problems due to waste are problems that require wise handling. Fly Ash (FA) waste from PLTU activities and Spent Bleaching Earth (SBE) waste resulting from the palm oil production process are very abundant, thus polluting the environment. Indonesia is currently prioritizing physical infrastructure development, which aims to improve connectivity and encourage economic growth in every sector. The development process that occurs increases the use of concrete. Concrete has a tremendous impact on the environment because most of its composition is cement. The use of cement in the manufacture of concrete results in the emission of large amounts of CO2 gas into the atmosphere, which causes an increase in global warming. The use of concrete can have a lower environmental impact if the use of cement is reduced as much as possible by adding a mixture of FA and SBE wastes. This research will utilize FA and SBE waste in the manufacture of normal concrete production weights and aim to determine the optimal composition of FA and SBE waste that is economically and environmentally feasible. The results of the research by applying FA and SBE substitutions show that FA is better than bleaching earth in the resulting compressive strength. The optimal composition of FA as a substitute for cement to achieve the quality of the planned concrete is 15%, while the composition of SBE as a substitute for cement is 10%. Keywords: concrete, Fly Ash (FA), Spent bleaching earth (SBE), concrete compressive strength ABSTRAK In the era of industry and technology in Indonesia, environmental problems due to waste are problems that require wise handling. Fly Ash (FA) waste from PLTU activities and Spent Bleaching Earth (SBE) waste resulting from the palm oil production process are very abundant, thus polluting the environment. Indonesia is currently prioritizing physical infrastructure development, which aims to improve connectivity and encourage economic growth in every sector. The development process that occurs increases the use of concrete. Concrete has a tremendous impact on the environment because most of its composition is cement. The use of cement in the manufacture of concrete results in the emission of large amounts of CO2 gas into the atmosphere, which causes an increase in global warming. The use of concrete can have a lower environmental impact if the use of cement is reduced as much as possible by adding a mixture of FA and SBE wastes. This research will utilize FA and SBE waste in the manufacture of normal concrete production weights and aim to determine the optimal composition of FA and SBE waste that is economically and environmentally feasible. The results of the research by applying FA and SBE substitutions show that FA is better than bleaching earth in the resulting compressive strength. The optimal composition of FA as a substitute for cement to achieve the quality of the planned concrete is 15%, while the composition of SBE as a substitute for cement is 10%. Kata kunci: beton, Fly Ash (FA), Spent bleaching earth (SBE), kuat tekan beton

Analisis Respon Siswa SMA di Kabupaten Situbondo terhadap Potensi Pemanfaatan Sampah Plastik sebagai Sumber Energi Listrik Rumahan Putri Sovi Damayanti; Sudarti Sudarti
Dampak Vol 18, No 2 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.18.2.37-43.2021

Plastic waste is one type of waste that is very difficult to decipher in the environment so as to reduce it and not pollute the environment many ways that have been done, such as 3R (Reduce, Reuse, Recycle) and currently many are utilizing it to become an alternative energy source. The purpose of writing this article is to find out the extent of the response of high school students in Situbondo district to the potential utilization of plastic waste as a source of home electrical energy according to the title of this article. The research method used is descriptive quantitative with data collection method using questionnaire method (questionnaire) through google form on high school students in Situbondo district. And the results from 87 high school students that plastic waste in Situbondo district is adequate to be used as a source of electrical energy and they are interested in learning it, but they are not sure if plastic waste as a source of small-scale electrical energy (home) can be applied in Situbondo in the future.Â Keywords: plastic waste, energy sources, home electricityÂ ABSTRAKÂ Sampah plastik merupakan salah satu jenis sampah yang sangat sulit diurai di lingkungan sehingga menguranginya dan tidak mencemari lingkungan banyak cara yang telah dilakukan, seperti 3R (Reduce, Reuse, Recycle) dan saat ini banyak yang memanfaatkannya menjadi sumber energi alternatif. Tujuan penulisan artikel ini adalah untuk mengetahui sejauh mana tanggapan siswa SMA di Kabupaten Situbondo terhadap potensi pemanfaatan sampah plastik sebagai sumber energi listrik rumah sesuai dengan judul artikel ini. Metode penelitian yang digunakan adalah deskriptif kuantitatif dengan metode pengumpulan data menggunakan metode kuesioner (angket) melalui google form kepada siswa SMA di Kabupaten Situbondo. Dan hasil dari 87 siswa SMA tersebut adalah sampah plastik di Kabupaten Situbondo cukup untuk digunakan sebagai sumber energi listrik dan mereka tertarik untuk mempelajarinya, tetapi mereka tidak yakin apakah sampah plastik sebagai sumber energi listrik skala kecil (rumah) dapat diterapkan di Situbondo di masa depan.Â Kata Kunci: sampah plastik, sumber energi, listrik rumahÂ

Perencanaan Sistem Pengangkutan Sampah Kecamatan Ngaliyan, Kota Semarang dengan Mengintegrasikan Analisis GIS dan Lalu Lintas Arumdani, Indah Sekar; Sumiyati, Sri; Samadikun, Budi Prasetyo
Dampak Vol 19, No 2 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.19.2.66-72.2022

Ngaliyan District, which is located in Semarang City, had a population of 162.622 in 2020, and its citizens multiply these couple of years. This rapid increase in population complies with waste production. However, the total amount of waste in 10 garbage dumps that go to the waste landfills is only 103,6 m3/day from the total amount of 270,98 m3/day. As a result, the percentage of waste transportation services in Ngaliyan District is only 32,8%. This phenomenon can occur because some garbage dumps have excessive generations. This study aims to plan an optimal waste transportation system so that costs incurred are more efficient. The condition of the road, traffic, and vehicle's speed of the waste transportation routes can influence the waste transportation time. Optimization method were using traffic counting and Network Analyst in GIS application. The lowest degree of road’s saturation at 05.00 - 12.00, which was the optimal transportation time. The optimal vehicle speed was gained from the degree of saturation, which was 49.8 km/hour, so the number of trips increases to 22 rits/day, with 18 containers and an average remaining working time of 2.11 hours. The percentage of the services increased to 62%, and the waste that went to the waste landfills become 168 m3. Vehicle operating costs that were calculated using the PIC method increased to IDR 1,870,555,843.46/ year. However, there was a decrease in the retribution cost to IDR 18,794/ family/ month because of the growth in the number of people served. Keywords: Optimization, waste transportation, GIS, traffic, vehicle operational costA B S T R A KKecamatan Ngaliyan yang terletak di Kota Semarang berpenduduk 162.622 jiwa pada tahun 2020, dan penduduknya berlipat ganda beberapa tahun ini. Pertambahan penduduk yang pesat ini sejalan dengan produksi sampah. Namun, total sampah di 10 TPA yang masuk ke TPA sampah hanya 103,6 m3 /hari dari total 270,98 m3 /hari. Akibatnya, persentase pelayanan pengangkutan sampah di Kecamatan Ngaliyan hanya 32,8%. Fenomena ini dapat terjadi karena beberapa tempat pembuangan sampah memiliki generasi yang berlebihan. Penelitian ini bertujuan untuk merencanakan sistem pengangkutan sampah yang optimal agar biaya yang dikeluarkan lebih efisien. Kondisi jalan, lalu lintas, dan kecepatan kendaraan pada jalur pengangkutan sampah dapat mempengaruhi waktu pengangkutan sampah. Metode optimasi menggunakan penghitungan trafik dan Network Analyst pada aplikasi GIS. Derajat kejenuhan jalan terendah pada pukul 05.00 - 12.00 merupakan waktu transportasi yang optimal. Kecepatan kendaraan optimal diperoleh dari derajat kejenuhan yaitu 49,8 km/jam, sehingga jumlah trip meningkat menjadi 22 rit/hari, dengan 18 peti kemas dan rata-rata sisa waktu kerja 2,11 jam. Persentase pelayanan meningkat menjadi 62%, dan sampah yang masuk ke TPA menjadi 168 m3 . Biaya operasional kendaraan yang dihitung dengan metode PIC meningkat menjadi Rp 1.870.555.843,46/tahun. Namun terjadi penurunan biaya retribusi menjadi Rp 18.794/KK/bulan karena pertumbuhan jumlah masyarakat yang dilayani. Kata Kunci: Optimalisasi, pengangkutan sampah, GIS, lalu lintas, biaya operasional kendaraan

Rancangan Teknis Reklamasi Lahan Bekas Penambangan Sirtu di Desa Trosono, Kecamatan Parang, Kabupaten Magetan Larasati, Indah; Hakim, Abdul; Yusrianti, Yusrianti; Pribadi, Arqowi; Utama, Teguh Taruna
Dampak Vol 20, No 1 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.20.1.33-42.2023

This study aims to assess the land damage caused by mining activities in the village of Trosono, Parang District, Magetan Regency, and to determine the plan for the reclamation of ex-mining land, namely by restoring the function of the ex-mining mining land according to its designation according to the Regional Regulation of Magetan Regency Number 15 of 2012 as production forest land and plantations. Based on the evaluation of land damage criteria that have been carried out on topography, soil, and vegetation conditions, 75% of these parameters are still feasible to be used as forest and plantation areas. The existing condition of the ex-situ mining area based on the results of surveys and field mapping, there are remnants of cliffs as high as 9.5 m where the slope is almost perpendicular to the bottom of the excavation. The planned reclamation activities include land surface arrangement by adjusting the geometry of the slopes with a maximum cliff height of 3 m, a terrace width of 2.1 m, and a slope angle of 30o at the end of the mining. Plants planned for revegetation are sengon and ginger with a spacing of 2 m x 3 m and ginger spacing of 0.3 m x 0.6. The dimensions of the sengon planting space used are 0.4 m x 0.4 m x 0.4 m and for ginger plants 0.3 m x 0.3 m x 0.3 m. With mathematical calculations, it is planned that the number of seeds of sengon plants to be planted is 56 seeds and 9.833 seeds of ginger plants. Keywords: ex-situ, ginger, mining, plantation, sengon ABSTRAK Penelitian ini bertujuan untuk mengkaji kerusakan lahan akibat kegiatan penambangan di Desa Trosono Kecamatan Parang Kabupaten Magetan, serta menentukan rencana reklamasi lahan bekas tambang yaitu dengan mengembalikan fungsi lahan bekas tambang. sesuai peruntukannya menurut Peraturan Daerah Kabupaten Magetan Nomor 15 Tahun 2012 sebagai kawasan hutan produksi dan perkebunan. Berdasarkan evaluasi kriteria kerusakan lahan yang telah dilakukan terhadap kondisi topografi, tanah, dan vegetasi, 75% dari parameter tersebut masih layak untuk dijadikan kawasan hutan dan perkebunan. Kondisi eksisting area penambangan ex situ berdasarkan hasil survei dan pemetaan lapangan terdapat sisa-sisa tebing setinggi 9,5 m yang kemiringannya hampir tegak lurus dengan dasar galian. Kegiatan reklamasi yang direncanakan meliputi penataan permukaan tanah dengan menyesuaikan geometri lereng dengan tinggi tebing maksimal 3 m, lebar teras 2,1 m, dan sudut kemiringan lereng 30o di ujung penambangan. Tanaman yang direncanakan untuk revegetasi adalah sengon dan jahe dengan jarak tanam 2 m x 3 m dan jarak tanam jahe 0,3 m x 0,6. Dimensi ruang tanam sengon yang digunakan adalah 0,4 m x 0,4 m x 0,4 m dan untuk tanaman jahe 0,3 m x 0,3 m x 0,3 m. Dengan perhitungan matematis, direncanakan jumlah bibit tanaman sengon yang akan ditanam sebanyak 56 bibit dan 9.833 bibit tanaman jahe. Kata kunci: ex-situ, ginger, mining, plantation, sengon

Peningkatan Ekologi Lahan di Universitas Negeri Malang melalui Rating tool Greenship Kawasan Yohanes Wilasa Widodo; Apif Miptahul Hajji; Dian Ariestadi
Dampak Vol 18, No 2 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.18.2.78-90.2021

The environment is a place to carry out life, activities and providers of important elements such as oxygen, water and food. As a result of poor environmental quality such as temperature that is too high, low humidity and air pollution, it makes the living and working environment uncomfortable. Green Building Council Indonesia published Greenship Neighborhood that can be a reference in implentation of sustainable area. The components of land ecological enhancement consist of green open space, micro climate, land revitalization, flora and fauna. The area of State University of Malang (UM) with a total area of 416,203 mÂ² becomes a small city that affects users of the area or the surrounding area. UM through the rating tool greenship area has very good land ecological quality. The green basic area with 28.12% fulfills the prerequisites, and the green area for the public is categorized as sufficient with 28.12% of the area. Very good habitat conservation by fulfilling the aspects of maintaining 95.84% of the area's large trees, using 99.385% of provincial local plants, and reforestation. Land revitalization is still in the sufficient category with 60% have been done. The microclimate aspect is categorized as very good with the lowest temperature isotherm in the area and efforts to apply it are carried out in all public areas of the area. Productive land area is categorized as very good with the dominance of 50% of production plant species spread over the entire area and the availability of special production landÂ Keywords: Green Area, Campus, Greenship, SustainabilityÂ ABSTRAKÂ Lingkungan adalah tempat untuk menjalani kehidupan, aktivitas, dan penyedia elemen penting seperti oksigen, air, dan makanan. Akibat kualitas lingkungan yang buruk, seperti suhu yang terlalu tinggi, kelembaban rendah, dan polusi udara, membuat lingkungan tempat hidup dan bekerja menjadi tidak nyaman. Green Building Council Indonesia menerbitkan Greenship Neighborhood yang dapat menjadi referensi dalam pelaksanaan area berkelanjutan. Komponen peningkatan ekologi tanah terdiri dari ruang terbuka hijau, iklim mikro, revitalisasi tanah, flora, dan fauna. Area Universitas Negeri Malang (UM) dengan luas total 416.203 mÂ² menjadi sebuah kota kecil yang memengaruhi pengguna area atau area sekitarnya. UM melalui alat penilaian area greenship memiliki kualitas ekologi tanah yang sangat baik. Luas area dasar hijau sebesar 28,12% memenuhi persyaratan, dan area hijau untuk masyarakat dikategorikan sebagai cukup dengan 28,12% dari area tersebut. Konservasi habitat yang sangat baik dengan memenuhi aspek mempertahankan 95,84% dari pohon besar area tersebut, menggunakan 99,385% tanaman lokal provinsi, dan program penghijauan. Revitalisasi tanah masih dalam kategori cukup dengan 60% telah dilakukan. Aspek iklim mikro dikategorikan sebagai sangat baik dengan isoterma suhu terendah di area tersebut, dan upaya untuk menerapkannya dilakukan di semua area publik area tersebut. Luas tanah produktif dikategorikan sebagai sangat baik dengan dominasi 50% spesies tanaman produksi tersebar di seluruh area dan ketersediaan lahan produksi khusus.Â Kata Kunci: Kawasan hijau, Kampus, Greenship, KeberlanjutanÂ

Potensi Jasa Lingkungan Penyerap Karbon dan Penyedia Oksigen Hutan Lindung Mangunan, Yogyakarta Putra, Ghalbi Mahendra; Utama, Pramudya Bagas; Suryatmojo, Hatma; Kusumandari, Ambar Kusumandari
Dampak Vol 20, No 2 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.20.2.49-53.2023

Forests have multifunction ecology, one of which is environmental services as a CO2 absorber and and O2 producer. The fact is that until now the magnitude of the potential for environmental services as carbon sinks and oxygen producers in the Mangunan Protection Forest is not known, so it is important to research it. The focus of this research is to determine the potential for environmental services in the form of biomass potential, carbon potential, carbon sinks, oxygen providers and their economic value. Carbon data collection in the field by measuring DBH and height of woody vegetation. Calculations using the 2011 BSNI standard and analyzed descriptively. The biomass potential of the Mangunan Protected Forest is 52.83 tons/ha and has threats in the form of trees and fires, so it needs to be preserved. Mangunan Protected Forest Environmental Services in the form of CO2 absorbers of 193.87 tons/ha/year and O2 producers of 141.53 tons/ha/year. The environmental services, if translated properly, are worth Rp. 2,122,640,368. Keywords: environment, sustainability, climate, biomass, vegetation ABSTRAK Hutan memiliki multifungsi ekologi, salah satunya adalah jasa lingkungan sebagai penyerap CO2 dan penghasil O2. Faktanya sampai saat ini belum diketahui besarnya potensi jasa lingkungan sebagai penyerap karbon dan penghasil oksigen di Hutan Lindung Mangunan, sehingga penting untuk diteliti. Fokus penelitian ini adalah untuk mengetahui potensi jasa lingkungan berupa potensi biomassa, potensi karbon, penyerap karbon, penyedia oksigen dan nilai ekonominya. Pengumpulan data karbon di lapangan dengan mengukur DBH dan tinggi vegetasi berkayu. Perhitungan menggunakan standar BSNI 2011 dan dianalisis secara deskriptif. Potensi biomassa Hutan Lindung Mangunan sebesar 52,83 ton/ha dan memiliki ancaman berupa pohon dan kebakaran sehingga perlu dilestarikan. Jasa Lingkungan Hutan Lindung Mangunan berupa penyerap CO2 sebesar 193,87 ton/ha/tahun dan penghasil O2 sebesar 141,53 ton/ha/tahun. Jasa lingkungan tersebut, jika diterjemahkan dengan baik, bernilai Rp. 2.122.640.368. Kata kunci: lingkungan, kelestarian, iklim, biomassa, vegetasi

Potensi Tanaman Lokal Sebagai Agen Bioremediasi Merkuri (Hg) Pada Lahan Bekas Tambang Emas Di Sarolangun, Jambi Mahya Ihsan; Freddy Ilfan; Zuli Rodhiyah
Dampak Vol 18, No 1 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.18.1.11-16.2021

Mercury is one of toxic heavy metal and can be accumulated in human and animalâ€™s bodies. The sources of mercury pollution are the natural sources and anthropogenic activities, like illegal gold mining. The aim of this study was finding potential indigeneous plants as agents in remediation process of ex-gold mining sites. It was conducted in Limun District, Sarolangun Regency, Jambi. The sampling location was 5-year-old ex-mining sites. It used purposive sampling method. Vegetation analysis was used to find out the dominant plants living in those. The measurement of mercury contamination was conducted in soil and plant using Inductively Coupled Plasma (ICP). Based on the survey results, there were 15 species of plants in the sampling sites. The 3-most dominant species were Phragmites sp., Melastoma sp., and Scleria sumatrana The INP value were 51,96; 41,78; and 21,93 respectively. Moreover, the value of BAC, TF, and BCF of Phragmites sp. were 0,1; 0,194; and 0,516 respectively, whilst those were 0,06; 0,25; and 0,26 for Melastoma sp. The same analysis was calculated for Scleria sumatrana, with BAC, TF, and BAF value as many as 0,076; 0,755; and 0,100 respectively. According to those, it could be concluded that Phragmites sp. had a better ability to remediate ex-gold mining sites compared to the others.Â Keywords: Bioremediation, mercury, indigenous plants, PETI (Unlicensed Gold Mining)Â ABSTRAKÂ Mercury adalah salah satu logam berat beracun yang dapat mengakumulasi di tubuh manusia dan hewan. Sumber polusi merkuri berasal dari sumber alami dan aktivitas antropogenik, seperti pertambangan emas ilegal. Tujuan dari penelitian ini adalah untuk menemukan tanaman asli potensial sebagai agen dalam proses remediasi situs bekas penambangan emas. Penelitian ini dilakukan di Kecamatan Limun, Kabupaten Sarolangun, Jambi. Lokasi pengambilan sampel adalah situs bekas penambangan emas berumur 5 tahun. Metode pengambilan sampel yang digunakan adalah purposive sampling. Analisis vegetasi digunakan untuk menentukan tanaman dominan yang hidup di area tersebut. Pengukuran kontaminasi merkuri dilakukan pada tanah dan tanaman menggunakan Inductively Coupled Plasma (ICP). Berdasarkan hasil survei, terdapat 15 spesies tanaman di lokasi pengambilan sampel. Tiga spesies yang paling dominan adalah Phragmites sp., Melastoma sp., dan Scleria sumatrana. Nilai INP masing-masing adalah 51,96; 41,78; dan 21,93. Selain itu, nilai BAC, TF, dan BCF dari Phragmites sp. adalah 0,1; 0,194; dan 0,516 secara berturut-turut, sedangkan nilai-nilai tersebut adalah 0,06; 0,25; dan 0,26 untuk Melastoma sp. Analisis yang sama dihitung untuk Scleria sumatrana, dengan nilai BAC, TF, dan BAF sebanyak 0,076; 0,755; dan 0,100 secara berturut-turut. Berdasarkan hal tersebut, dapat disimpulkan bahwa Phragmites sp. memiliki kemampuan yang lebih baik dalam remediasi situs bekas penambangan emas dibandingkan dengan tanaman lainnya.Â Kata Kunci: Bioremediasi, merkuri, tanaman lokal, PETI

Pengaruh Penggunaan Lahan Terhadap Debit Banjir Rancangan Di DAS Baubau Nuzul, Muhammad; Achmad, Mahmud
Dampak Vol 19, No 1 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.19.1.22-29.2022

ABSTRACTThis research was conducted in the city of Baubau, Southeast Sulawesi Province, the location is focused on the area directly adjacent to the Baubau River which has a river length of 15,704 Km in the Baubau catchment with an area of 76,117 Km2. which empties into residential areas as areas where seasonal floods often occur. To reduce the risk of loss due to the impact of flooding flood control efforts are needed that can be carried out properly if the flood discharge design of the repeat design can be known. This study aims to analyze changes in land use against runoff coefficient with flood discharge design period of time in Baubau watershed. The analysis used is the descriptive analysis regarding the spatial distribution pattern of land use and its effect on the runoff coefficient in 2019. Then to get the discharge plan for the return time analysis was carried out using the Nakayasu Empirical method or the Synthetic Unit Hydrograph (HSS) with rainfall data for 2010 to 2019 obtained from the BMKG Betoambari station in Baubau City. From the results of the analysis, it will be obtained the flood discharge plans for the return period of 5, 10, 20, 25, 50, and 100 years.Keywords: Baubau watershed, flood discharge, hydrograph ABSTRAKPenelitian ini dilakukan di Kota Baubau Provinsi Sulawesi Tenggara, lokasi difokuskan pada wilayah yang berbatasan langsung dengan Sungai Baubau yang memiliki panjang sungai 15.704 Km di DAS Baubau dengan luas wilayah 76.117 Km2. yang bermuara di pemukiman penduduk sebagai daerah yang sering terjadi banjir musiman. Untuk mengurangi resiko kerugian akibat dampak banjir diperlukan upaya pengendalian banjir yang dapat dilakukan dengan baik jika debit banjir desain desain ulang dapat diketahui. Penelitian ini bertujuan untuk menganalisis perubahan penggunaan lahan terhadap koefisien limpasan dengan debit banjir periode rencana waktu di DAS Baubau. Analisis yang digunakan adalah analisis deskriptif mengenai pola sebaran spasial penggunaan lahan dan pengaruhnya terhadap koefisien limpasan Tahun 2019. Kemudian untuk mendapatkan debit rencana waktu ulang dilakukan analisis dengan menggunakan metode Empiris Nakayasu atau Hidrograf Satuan Sintetis (Synthetic Unit Hydrograph). HSS) dengan data curah hujan tahun 2010 sampai dengan tahun 2019 diperoleh dari stasiun BMKG Betoambari Kota Baubau. Dari hasil analisa tersebut akan diperoleh debit banjir rencana kala ulang 5, 10, 20, 25, 50 dan 100 tahun.Kata kunci: DAS Baubau, debit banjir, hidrograf

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Location Kota padang, Sumatera barat INDONESIA

Abstract

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Contact Name
-

Contact Email
-

Phone
-

Journal Mail Official
-

Editorial Address
-

Location
Kota padang,

Sumatera barat

INDONESIA