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Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan

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ISSN : 1907817X EISSN : 25500023 DOI : -

Core Subject : Science, Agriculture,

Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Articles 600 Documents

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Pengolahan Logam Pb(II) pada Limbah Cair Menggunakan Metode Kombinasi Elektrokoagulasiâˆ’Adsorpsi Karbon Aktif Setiawan, Adhi; Ramadani, Tarikh Azis; Hanastasia, Rizka Lutfita
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 2 (2020): Juli 2020
Publisher : Universitas Diponegoro

Logam berat Pb(II) merupakan jenis polutan yang menyebabkan pencemaran air serta berdampak terhadap kerusakan ekosistem. Limbah logam Pb(II) bersifat racun serta biomagnifikasi sehingga berdampak negatif terhadap kesehatan manusia. Kombinasi proses elektrokoagulasi dan adsorpsi merupakan salah satu alternatif yang efisien serta efektif dalam menghilangkan logam Pb(II) di dalam air limbah. Pada penelitian ini, proses pengolahan air limbah dilakukan secara batch menggunakan elektrokoagulasi dengan elektroda aluminium dan dilanjutkan dengan adsorpsi karbon aktif. Penelitian ini bertujuan menganalisis pengaruh tegangan elektrokoagulasi, waktu kontak adsorpsi, dan dosis adsorben terhadap penurunan konsentrasi Pb(II). Proses elektrokoagulasi dan adsorpsi menggunakan variasi tegangan (10, 20, 30 V), waktu adsorpsi (15, 30, 45 menit), serta dosis adsorben (2,5, 3,3, 4,1, 5 g/L). Hasil penelitian menunjukkan bahwa kombinasi elektrokoagulasi dan adsorpsi dapat menurunkan konsentrasi Pb(II) dalam air limbah secara signifikan. Peningkatan tegangan listrik, waktu adsorpsi, dan dosis adsorben menyebabkan meningkatnya efisiensi penyisihan Pb(II). Efisiensi penyisihan logam Pb(II) maksimal diperoleh pada kondisi tegangan 30 V, waktu adsorpsi 45 menit, serta dosis adsorben 5 g/L. Pada kondisi tersebut diperoleh efisiensi penyisihan Pb(II) sebesar 96,01%.

Analisis Kelayakan Ekonomi Pengelolaan Sampah Plastik Rumah Tangga Menggunakan Trichoderma sp. Zulaika, Aidha; Soesilo, Tri Edhi Budhi; Noriko, Nita; Sahamony, Nur Fitriyani
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 2 (2020): Juli 2020
Publisher : Universitas Diponegoro

Processing and managing plastic waste must be carried out through the application of environmental sustainability that can integrate ecology-based management and consider the social and economic dynamics known as the Socio-Ecological System (SES). This study aimed to determine the economic feasibility of household plastic waste management using Trichoderma sp. The research method used was the observation of plastic waste management in the community and secondary data processing results from field research on plastic waste processing with Trichoderma sp. Data analysis was carried out by applying economic analysis using the Benefit-Cost Ratio (BCR) analysis. Based on the economic analysis, it was found 1.29 BCR values for plastic waste processing using Trichoderma sp.

Dinamika Karbon dan Mikroba dalam Tanah pada Perlakuan Biochar Kompos Plus Purbalisa, Wahyu; Zulaehah, Ina; Paputri, Dolty Melyga W.; Wahyuni, Sri
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 2 (2020): Juli 2020
Publisher : Universitas Diponegoro

Carbon and microbes in the soil fluctuated from time to time due to various things. This study aims to determine the dynamics of carbon and microbes in the soil in the treatment of biochar-compost. In addition to the use of biochar-compost, this research also uses nano biochar and enrichment with microbial consortia. The study was conducted at the screen house using a complete randomized design with three replications with following treatments: control / without organic fertilizer (P0), compost (P1), biochar-compost 1: 4 (P2), nano-biochar-compost 1: 4 (P3 ), biochar-compost + microbial consortia (P4), compost + microbial consortia (P5) and biochar-compost + microbial consortia (P6) with a dose of 2.5 tons/ha respectively. Biochar comes from corncobs. Compost biochar plus application was made before planting.Â Parameters observed were soil carbon (C-organic), soil acidity (pH) at 7 DAA, 37 DAA and after harvest, and the total soil microbial population at 2 DAA and after harvest. Soil carbon was measured using Walkey and Black method measured by spectrophotometer, soil pH using a soil: water ratio = 1: 5 and measured by a pH meter, the total microbial population using Total Plate Counting (TPC) method. The results showed carbon and soil microbial populations decreased over time, except for microbial communities in a single compost treatment.

Pemetaan Hidrogeologi untuk Analisis Zona Konservasi Air Tanah di Cekungan Air Tanah (CAT) Sumowono, Provinsi Jawa Tengah Putranto, Thomas Triadi; Susanto, Novie; Pangestuti, Dina Rahayuning; Pranata, Mathias Andika Setya
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 2 (2020): Juli 2020
Publisher : Universitas Diponegoro

Groundwater management at groundwater basins Sumowono needs to be done because of the increasing development of the area. This research is oriented to analyzing groundwater conditions, compiling groundwater conservation zones, and explaining conservation zones' suitability with spatial maps. The method used is mapping hydrogeological conditions such as surface observation of rock types, inventory of hydrogeological points of interest, knowing the patterns and directions of groundwater flow, groundwater utilization, and groundwater sampling to measure the degree of acidity and electrical conductivity. From the mapping results, it is found that the lithology is composed of tuffaceous sandstones and volcanic breccias. Based on the free groundwater table analysis, the free groundwater flow pattern follows the topographic slope, flowing from the high topography on the south and southeast sides to the low topography on the north side of the area. The utilization of groundwater is used for irrigation, domestic and fishery purposes. Measurement of groundwater samples' quality for the degree of acidity is between 5.32-7.98 while the electrical conductivity is between 36-550 ÂµS / cm, and the level of damage due to groundwater utilization is included in the safe zone. The groundwater conservation zone consists of recharge areas and spring protection zones. The result of overlapping between the groundwater conservation zone and the spatial plan map shows suitability as a protection zone.

Pemetaan Lahan Sub-Optimal Berbasis Nilai NDVI Sentinel 2a: Studi Pendahuluan Indarto, Indarto; Nadzirah, Rufiani; Reksa Belagama, Hadrian
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 3 (2020): November 2020
Publisher : Universitas Diponegoro

Normalised Difference Vegetation Index (NDVI) is one of the vegetation indices used to analyse vegetation density. This study presents the potential use of NDVI to map dry-marginal-agricultural land (Dry-MAL). The study conducted in the eastern part of Situbondo, which includes three districts, namely, Arjasa, Asembagus and Jangkar. Sentinel-2A (recorded in 2018) and 450 Control points (GCPs) are used as the primary input. The region is an area with distinctive climate characteristics, where the dry season is longer than the rainy season. Analysis using "SNAP plug-ins" and "QGIS". Research procedures include (1) data inventory, (2) data pre-processing, (3) data processing and (4) accuracy testing. The NDVI classification can distinguish six (6) classes of land-use, i.e., water bodies, residential areas, dry MAL, non-irrigated rural area, irrigated paddy fields, forest-plantations. The NDVI classification produces Overall and Kappa accuracy values =Â 66,9% and 61,6%. Although the overall and kappa accuracy is below the standard, however, the result will benefit for further research of index vegetation or soil more applied for the identification of Dry-MAL

Synthesis of Silver Nanoparticles with Reductant of Java Long Pepper Leaf Extract (Piper Retrofractum Vahl) and Its Application as a Mercury Detector Muhamad Allan Serunting; Prio Santoso; Indah Puspita Sari; Riyanto Widodo
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

The synthesis of silver nanoparticles using the green chemistry concept utilizing Java long pepper leaf extract as a reducing agent has been successful. Silver nanoparticles were synthesized under optimum 1 mM silver nitrate concentration, 250 μL Java long pepper leaf extract, and 30 minutes under sunlight radiation. The silver nanoparticles formed can be confirmed by the change in the color of the solution from colorless to brownish red, indicating a reduction of Ag+ to Ag0. The Uv-vis spectrum showed a peak Surface Plasmon Resonance (SPR) at 441 nm. The FTIR spectrum showed that functional groups' vibrations in the Java Chili Leaf extract confirm that the phenol, alkaloid, and flavonoid compounds present in the extract act as reducing agents. TEM images show spherical silver nanoparticles with an average diameter of 17.65 nm. The potential of silver nanoparticles to detect Hg (II) metal is evidenced by a decrease in the color intensity of the silver nanoparticle solution along with the increasing concentration of Hg (II), which reacts back-oxidizing Ag0 to Ag+. The value of the correlation coefficient of the linear equation is 0.9807.

Coconut shell-based activated carbon preparation and its adsorption efficacy in reducing BOD from The Real Wastewater from Kitchen Restaurant (RWKR): Characteristics, Sorption Capacity, and Isotherm Model Yasdi Yasdi; Dhea Ussarvi; Rinaldi Rinaldi; Febri Juita; Shassy Endah Cahyani
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

Real Wastewater from Kitchen Restaurant (RWKR) contains high concentrations of Biochemical Oxygen Demand (BOD) pollutants to pollute the environment. One of the processing alternatives to reduce BOD is the adsorption method using activated carbon from coconut shells. This study aims to determine coconut shell-activated carbon as an adsorbent for the adsorption of organic matter to reduce BOD in RWKR. The method begins with making adsorbents that are activated with activators on HCl 3 M, NaOH 3 M, and H3PO4 M, then a preliminary adsorption test is carried out to select the best activator on coconut shell activated carbon to reduce BOD in RWKR. Determining the optimum conditions for adsorption was carried out by varying pH 3, 4, 5, 6, 7, and 8. Variation of contact time with a stirring speed of 250 rpm, then determined the isotherm model. The remaining organic matter in the wastewater will be measured using a DO meter based on SNI 6989.72: 2009 concerning the method of testing for biochemical oxygen demand (BOD). The results showed that the appropriate activator for coconut shell activated carbon was H3PO4 3 M with an average percentage value of uptake of 89.690%. The adsorption process's optimum pH is at pH 3 with an absorption percentage value of 88.626%. The optimum contact time is at 10 minutes and the adsorption isotherm model used is the Freundlich isotherm with a regression value of R2 = 0.8864.

Penentuan Sistem Pengelolaan Limbah Domestik Berkelanjutan di Wilayah Padat Penduduk Bantaran Sungai Ciliwung (Studi Kasus: Kelurahan Cililitan) Paramita, Nadia; Ningrum, Sari Sekar
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 3 (2020): November 2020
Publisher : Universitas Diponegoro

The Ciliwung River is one of the main rivers flowing in the DKI Jakarta area. Ciliwung has an area of 370.8 km2, with a length of 124.1 km. The Ciliwung River contributes greatly to the communities in three big cities, namely Bogor, Depok and Jakarta as a source of drinking water, a source of raw water and a source of water for irrigation. The condition of household wastewater is currently discharged directly or indirectly into river water bodies. gray water is immediately discharged into the water body without being treated. Blackwater is treated to inadequate septic tanks or discharged directly into water bodies. This condition certainly requires a fast and precise solution and handling. In terms of domestic wastewater management, both gray water and black water, at this time Cililitan village is not included in the area that is accessible to centralized wastewater piping or off-site systems and does not have land that can be used to make a communal system waste treatment so that most of the households still throw away directly into the river or using a septic tank without regular desludging. The purpose of this study is to identify the current waste management conditions in Cililitan Village and provide recommendations for the selection of a sustainable domestic waste management system that is acceptable to the community and safe for the environment.

Biofilm Formation and Bio Corrosion of Carbon Steel in Diesel-Biodiesel Storage Tank Aida Nur Ramadhani; Ardiyan Harimawan; Hary Devianto
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

Biodiesel is potential to blend with petroleum diesel as an alternative blended fuel. Biodiesel is usually stored in carbon steel storage tank which easily corroded by microorganisms. Microorganisms can use blended fuels as carbon source and water from biodiesel which is hygroscopic for growth and metabolism. Thus, degradation of fuel may occur and lead to biocorrosion by microorganisms such as Bacillus megaterium. This research was conducted to determine the effect of biodiesel concentration of blended fuel on biofilm formation and biocorrosion by Bacillus megaterium. The experiments were carried out by immersing carbon steel specimens in immersion medium for 21 days with variation of biodiesel concentration (B0, B20, B30, and B100). Biofilms that form on the metal surface cause areas with non-uniform oxygen concentrations and form anodic/cathodic conditions, raised to potential differences and biocorrosion occurred. The average corrosion rates were 0,035 ± 0,03; 0,533 ± 0,33; 0,642 ± 0,28; 0,109 ± 0,04 mm/year achieved by B0, B20, B30 and B100 respectively. These rates increased when compared to the control medium. Microorganism activity also caused damage to the metal surface by forming pitting corrosion on B30 and B100.

Studi Daya Dukung Lingkungan dan Tingkat Kekritisan Berdasarkan Pendekatan Ketersediaan Air Kota Balikpapan Harfadli, Muhammad Ma'arij; Ulimaz, Mega
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 3 (2020): November 2020
Publisher : Universitas Diponegoro

One of the priority problems in Balikpapan is the limited availability of raw water. This is due to the rapid growth of domestic and non-domestic activities in Balikpapan while the Manggar Reservoir as the main source of Â water supply is almost close to maximum capacity. The impact that will occur is a decrease in the environmental carrying capacity of Balikpapan. So it is necessary to predict when the availability of water in Balikpapan will reach a critical point. The method used in this study is to calculate the need and availability of water in Balikpapan, then calculate the ratio of water availability and demand to determine the carrying capacity and the water criticality index. The results of the calculation of the Environmental carrying capacity status in this study indicate that the water resources in Balikpapan from 2019 to 2029 are worth between 1-2 so that they are included in the conditional safe category. The calculation of the Water Critical Index Â shows that in 2019 and 2024 is approaching critical (50-70%). Meanwhile, in 2029 the water criticality index of Balikpapan will reach critical status (84%). So it is necessary to conserve water resources in Balikpapan.

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