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All Journal Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Marisi, Dany Poltak
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology

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Seasonal Assessment of Water Quality and Pollution Index of Cileungsi River in Bogor Regency, Indonesia Marisi, Dany Poltak; Suprihatin, Suprihatin; Sigid Hariyadi; Kaswanto, Regan Leonardus Kaswanto
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 15 No 4 (2025): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.15.4.615

Abstract

The Cileungsi River is the upstream part of the Bekasi Watershed, and its existence is crucial for the sustainability of the local economy and the survival of the community, industry, agriculture, and commerce surrounding the riverbanks. It is also the raw water source for Regional Water Company. This study aims to assess the water quality of the Cileungsi River and its pollution status using the Pollution Index (PI) method. This research was conducted at six sampling points, covering the upstream, middle, and downstream sections in both the dry and rainy seasons of 2022. The method used to analyze the water quality of the Cileungsi River refers to the Indonesian National Standard. In contrast, the calculation of the PI refers to the Decree of the State Minister of Environment. During the dry season, the PI at the Regional Water Company bridge in Kota Wisata and beside PT Rahayu Indah Kulit fell into the moderately polluted category, with PI values of 5.49 and 7.30, respectively. The highest PI value during the rainy season was recorded at 10.30 on the border of Bogor Regency and Bekasi City, which falls within the heavily polluted category. The Gunung Putri area has a lightly polluted index value in both seasons. The parameters that require attention are BOD, NO2-, free chlorine, and fecal coliform, which serve as indicators of pollution from household and agricultural activities. These results will help the Bogor Regency government develop strategies to protect and sustainably manage the Cileungsi River.
Penurunan Kadar Torium dan Radioaktivitas dalam Limbah Cair Proses Pengolahan Monasit PLUTHO Menggunakan Koagulan FeSO4 Marisi, Dany Poltak; Suprihatin; Ismayana, Andes
EKSPLORIUM Vol. 39 No. 1 (2018): MEI 2018
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2018.39.1.4276

Abstract

The separation of radioactive and rare earth mineral carried out in PLUTHO produces waste that still contains thorium and uranium. The resulting waste requires further processing to be environmentally friendly. The purpose of study is to reduce thorium content and radioactivity in liquid waste of PLUTHO monazite treatment process using ferro sulphate coagulant. PLUTHO Pilot Plant is one of facility that built to dissociate uranium, thorium and light rare earth from mineral of monazite. Variations of treatments applied in the research are coagulant dosage and pH. Thorium content is measured by Spectrophotometer UV-Vis method, whereas radioactivity is measured by radiation counting meter Ludlum Model 1000 Scaler. The result shows that the optimum condition of coagulation is in pH 8,0 with concentration of ferro sulphate 225 mg/L which may reduce thorium content up to 45,20 % and reduce radioactivity to 100 % out of its initial thorium content and radioactivity as much as 0,73 mg/L and 1,35 Bq/g, respectively.
Reduksi Torium Pada Limbah Cair Pengolahan Monasit Menggunakan Resin Penukar Anion Hasna, Laili; Amalia, Suci; Marisi, Dany Poltak
EKSPLORIUM Vol. 41 No. 2 (2020): NOVEMBER 2020
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2020.41.2.6006

Abstract

The effect of separating rare earths from monazite is wastewater containing the radioactive element thorium which is harmful to the environment and living things. A standard method of separating thorium from wastewater is with anion-exchange resin. This study determines the optimum type of anion-exchange resin, resin weight, and contact time to reduce thorium levels in monazite wastewater. The results showed that the optimum exchange rate that occurred in Amberlite IRA402 resin is 57.7%, at 60 minutes and 1 gram. Meanwhile, the optimum exchange rate for Tulsion A23 resin is 50.7%, at 50 minutes and 1 gram. The statistical test showed that there was no significant difference in the resin type and contact time variation, which showed a considerable value >0.05. At the same time there was a substantial difference in resin mass variation with a significant value <0.05. The Duncan test stated that lighter resin masses (0.25 and 0.5 gram) are suitable for Tulsion A23 and heavier resin masses (0.75 and 1 gram) are ideal for Amberlite IRA402.
Fitoremediasi Limbah Radioaktif Cair Menggunakan Kayu Apu (Pistia stratiotes) Untuk Menurunkan Kadar Torium Soheti, Prima; Sumarlin, La Ode; Marisi, Dany Poltak
EKSPLORIUM Vol. 41 No. 2 (2020): NOVEMBER 2020
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2020.41.2.6092

Abstract

Thorium (Th) waste is an alpha-emitting radioactive waste that is harmful to the environment and living things so it is necessary to treat the waste effectively with phytoremediation. Phytoremediation is a plant ability to reduce pollutants presence in the environment. This research aim is examining apu wood plant ability to reduce Th contents from Th-contaminated waste. The UV-VIS spectrophotometer analysed Th level in apu wood plant and liquid waste while the Ludlum Model 1000 Scaler measured their radioactivity. The parameters for phytoremediation occurrence include the decreasing physical condition of the plants, the pH of the waste that is close to neutral, and the temperature that fluctuates with the ambient temperature. The results showed that the plant biomass of apu wood decreased after phytoremediation to 96.2% with a remediation efficiency of 97.4% from the initial concentration of Th liquid radioactive waste of 10 ppm. This is due to thorium absorption resulting in thorium accumulation in apu wood plants of 4,069.4 mg/kg. Apu wood was also able to reduce Th liquid waste radioactivity to 0.631 Bq/L from the initial radioactivity of 2.819 Bq/L. The radioactivity level is below the Klierens Level and it is safe to release the waste into the environment.
Co-Authors Andes Ismayana Hasna, Laili Kaswanto, Regan Leonardus Kaswanto La Ode Sumarlin Sigid Hariyadi Soheti, Prima Suci Amalia Suprihatin Suprihatin Suprihatin