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All Journal PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman Jurnal Riset Teknologi Industri
Saibun Sitorus
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : PROSIDING SEMINAR KIMIA

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PEMANFAATAN ARANG AKTIF DARI KULIT BUAH BINTARO (Cerbera Manghas) SEBAGAI ADSORBEN ION LOGAM Mn (II) Margarita Margarita; Saibun Sitorus; Rahmat Gunawan
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2017
Publisher : PROSIDING SEMINAR KIMIA

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There has been research on the utilization of activated charcoal carbon as an adsorben of cerbera manghas shell in metal ions Mn. This research was intended to find the effects of pH value, contact period and to determine the maximum adsorptive capacity Mn metal ions by cerbera manghas shell activated carbon. The adsorption process have been variate of pH 2, 3, 4, 5 dan 6; contact time variation 15, 30, 45, 60 and 75 and 90 minutes; concentration variation 20, 40, 60, 80 and 100 mg/L. The analysis of metal ions Mn concentration by cerbera manghas shell activated carbon by using atomic absorption spectrophotometer (AAS). The result of this research shows that cerbera manghas activated carbon could adsorb metal ion Mn. The optimum condition was achieved at the pH 2 with a number of metal ions that adsorbed at 9,689 mg/L, with optimum period of 90 minutes with a number of metal ions that adsorbed at 9.414 mg/L, as for optimum concentration was achieved at the cosentration 100 mg/L with a number of metal ions that adsorbed at 25,932 mg/L. Keywords : cerbera manghas shell, activated carbon, adsorption, metal ions Mn.
PEMODELAN SETTLING POND UNTUK PENURUNAN PENCEMARAN KIMIA-FISIK AIR LIMBAH PERTAMBANGAN BATUBARA Saibun Sitorus; Wahyudin M.
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Making a variety of settling ponds in coal mining is one of the models for reducing the burden of wastewater pollution. This settling pond variation modeling aims to evaluate the ability to reduce the pollution load of wastewater based on chemical quality. The settling pond variation model consists of 3, namely settling pond model 1, model 2 and model 3. The method in this study is descriptive qualitative. Based on the results of the study, the reduction of pollution load on model (1) was 2% (0.0031 kg / second), for model (2) 1.21% (0.4281kg / second) and model (3) 1% (0.0074 kg / second). Actual Pollutant Load -BPA at the settling pond variation site is smaller compared to the Maximum Pollutant Load-BPM (BPA<BPM). Actual pollutant load of settling pond variations (1) 0.107 kg/second, (2) of 0.032 kg/second and (3) 0.105 kg/second. Maximum Pollutant Load (BPM) settling pond (model 1) 0.165 kg/sec, (model 2) 2.01 kg/sec and (model 3) 0.628 kg/sec. The decrease in the load of pollutants in the settling pond is influenced by several factors including vegetation, distance of the source of the pollutant (catchment area) with the settling pond, dimensions of the settling pond (retention pond), the process of giving coagulants, topography, type of lithology. Keywords: Settling pond modeling, pollution reduction, polluting load, Chemical-physical
ANALISIS KADAR MAGNESIUM (Mg) TOTAL DAN MANGAN (Mn) PADA PENAMBAHAN EM4 TERHADAP PUPUK KOMPOS (SAMPAH KULIT KEDELAI - KACANG PANJANG) Darius Ryan Partogi Simamora; Saibun Sitorus; Daniel Tarigan
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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This study on composting time analysis and determining the optimum time based on pH conditions, temperature and humidity of soybean peel and string bean compost and determining the optimum variation of EM4 bioactivators to total magnesium (Mg) and manganese (Mn) levels has been carried out. The study consisted of making compost in takakura baskets, measuring the pH, temperature and humidity of the compost and analyzing total magnesium (Mg) and manganese (Mn) levels using an atomic absorption spectrophotometer. The results of measuring the pH, temperature and humidity of the compost were tested using a one-way analysis of variance test. The results showed that the F value of calculating the pH, temperature and humidity of the compost was greater than the table F value with successive values of 146.427 > 2.62; 10,690 > 2.62; 746.343 > 2.62 so it was concluded that the composting time had a significant effect on the pH, temperature and humidity of the compost. The optimum time of composting is 16 days with a pH of 7.19-7.5, a temperature of 27-28.9oC and a humidity of 50-60%. The optimum variation of EM4 is 5 mL with a total magnesium (Mg) content value of 0.09644% and manganese (Mn) total of 0.01788%.
UJI AKTIVITAS ANTIBAKTERI DARI EKSTRAK METANOL DAUN DOLAR (FICUS PUMILA L.) TERHADAP BAKTERI Streptococcus mutans DAN Salmonella typhi DENGAN MENGGUNAKAN METODE DIFUSI AGAR Marulak Sehat Sinaga; Daniel Daniel; Saibun Sitorus; Agustina Rahayu M.
PROSIDING SEMINAR KIMIA Vol 1 No 1 (2022): Prosiding SNK 2022
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Phytochemical screening and antibacterial activity from methanol extract of Dollar leaves (Ficus pumila L.) against Streptococcus mutans and Salmonella typhi bacteria has been done. The extraction was done by maceration extraction using methanol. Phytochemical test showed Ficus pumila L. contains secondary metabolites including alkaloids and steroids. Antibacterial activity test using diffusion methode of agar by well and disc indicate the presence of antibacterial activity (same MIC among concentration 0-0.625%) againts Streptococcus mutans and Salmonella typhi bacteria. The diameter range againts Streptococcus mutans and Salmonella typhi bacteria by well including with 13.5 mm (strong antibacterial activities) dan 16.67 mm (strong antibacterial activities) while by paper disc including with 15.66 mm (strong antibacterial activities) dan 16.3 mm (strong antibacterial activities). Keywords: Phytochemical, Antibactery, Dollar Leaves (Ficus pumila L.), Agar Diffusion
PEMANFAATAN ARANG AKTIF BONGGOL JAGUNG (Zea mays) SEBAGAI ADSORBEN RADIKAL ALKIL PEROKSIDA PADA MINYAK JELANTAH : STUDI PENURUNAN BILANGAN PEROKSIDA Hasriani; Saibun Sitorus; Irfan Ashari Hiyahara
PROSIDING SEMINAR KIMIA Vol 4 No 1 (2025): Prosiding SNK 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Used cooking oil is known to contain lipids resulting from the oxidation process at high heating temperatures. The oxidation process in cooking oil continuously causes the formation of alkyl peroxide radicals. Used cooking oil is at risk of disrupting water and soil ecosystems if disposed of into the environment without further management. In this study, a characterization test of corn cob activated charcoal was carried out based on SNI 06-3730-1995, characterization using the Surface Area Analyzer (SAA) instrument and a test of the peroxide number in used cooking oil. The results of the activated charcoal characterization test showed that it still met the requirements of SNI 06-3730-1995 and showed an increase in surface area of ​​109,705 m2/g in the SAA test. In the control before the adsorption process using corn cob activated charcoal, the peroxide number was 30 mek O2/kg. In the refining process of used cooking oil, there was a decrease in the peroxide number. The optimum decrease in the peroxide number was found at a charcoal mass of 4 g with a contact time of 45 minutes. The peroxide value obtained was 8 mek O2/kg, which was a decrease of around 73.33% from the used cooking oil before refining. Keywords: Activated Charcoal, Alkyl Peroxide Radicals, Surface Area Analyzer, Used Cooking Oil, Zea Mays.
Co-Authors Agnes Lebang Agustina Rahayu M. Akhmad Rifani Aman Sentosa Panggabean Azwar Amin Bohari Yusuf Daniel Daniel Daniel Tarigan Darius Ryan Partogi Simamora Deristu Samurai Teweng Dzulkarnain Dzulkarnain Eka Riskhi M Eldha Sampepana Emakana Lestari Br Kaban Firdaus S. R Haspiadi Haspiadi Hasriani Irfan Ashari Hiyahara Margarita Margarita Marulak Sehat Sinaga Muhammad Fadliannur Nur Linda Anggraini Rahmat Fajar Riyanto Rahmat Gunawan Recha Defrosa Morasih Samta Sihotang Suroto Hadi Saputra Wahyudin M. Winni Astuti