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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.

PEMANFAATAN LIMBAH TONGKOL JAGUNG (Zea mays L.) SEBAGAI ARANG AKTIF DALAM MENURUNKAN KADAR AMONIA, NITRIT DAN NITRAT PADA LIMBAH CAIR INDUSTRI TAHU MENGGUNAKAN TEKNIK CELUP Azwar Amin; Saibun Sitorus; Bohari Yusuf
JURNAL KIMIA MULAWARMAN Vol 13 No 2 (2016)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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A research about utilization of waste corncob (Zea may L.) as active charcoal in reduction ammonia, nitrite and nitrate levels on industrial tofu liquid waste using dye technique have been researched. The purpose of this research to know reduction levels of industrial tofu liquid waste from some parameter is ammonia, nitrite and nitrate by using 2 variations is contact time and pH tofu liquid waste. The percentage yield of research to show of reduction ammonia, nitrite and nitrate levels at the optimum contact time 10 minute and the optimum pH 6 that is 51,29%, 31,93% and 58,71%. And then analyzed of data by using ANOVA test to know Fcount influence of the contact time of active charcoal to reduction ammonia, nitrite and nitrate levels on industrial tofu liquid waste that is 2,4891 less than Ftable 3,00. It is stated that is no significant effet on the reduction ammonia, nitrite and nitrate levels of industrial tofu liquid waste by using variation contact time active charcoal. While Fcount influence of optimum pH industrial tofu liquid waste to reduction ammonia, nitrite and nitrate levels on industrial tofu liquid waste that is 5,7168 more than Ftable 2,07. It is stated that is a significant effet on the reduction ammonia, nitrite and nitrate levels of industrial tofu liquid waste by using variation optimum pH industrial tofu liquid waste.

PENENTUAN KADAR ASAM AMINO ESENSIAL (FENILALANIN, TREONIN, TIROSIN DAN VALIN) PADA TELUR PENYU DAN TELUR AYAM RAS Agnes Lebang; Saibun Sitorus; winni astuti
JURNAL KIMIA MULAWARMAN Vol 15 No 2 (2018)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/jkm.v15i2.410

Determination of amino acid essential’s content (phenylalanin, threonin, tyrosin and valine) on turtle eggs and chicken eggs. Turtle eggs and chicken eggs are a high animal protein source and easy to obtain. This research has been carried out by categorizing of turtle eggs and chicken eggs by size and continued analysis of water content by Methods of Gravimetry, analyzes protein content total by the Method of Kjeldahl and analysis of the levels of essential amino acids with Method of HPLC (High Performance Liquid Chromatography). In this study, the researcher found the water content in the mix (large, medium and small) is 73,1891% and mixture of chicken eggs of different size is 73,1820%. Results of total protein content with used Kjeldahl method mixture based on the size of turtle eggs is 9,3114% and mixture chicken eggs is 10,2691%. Results of the amino acid content with used HPLC (High Performance Liquid Chromatography) method on a mixture of turtle eggs is Phenylalanin 1,69%, Threonin 1,16%, Tyrosin 2,46% and Valine 1,46%. Mixture of chicken eggs is Phenylalanin 0,30%, Threonin 0,61%, Tyrosin 1,03% and Valine 0,55%

Kunyit Putih (Curcuma zedoaria [Berg.] Roscoe) sebagai Pengawet dan Antioksidan Pangan Suroto Hadi Saputra; Saibun Sitorus
Jurnal Riset Teknologi Industri Vol 8 No 16 Desember 2014
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Community health awareness, especially regarding the selectionof healthyfoods. Healthy food is pretty containing nutrients, it does not contain harmful substances, andfresh. This scientific review using literature search. The purposeof this paperis to provide information about the white turmeric (Curcuma zedoaria[Berg.] Roscoe) as preservative and antioxidant agents of food products. White turmeric (C. zedoaria) contains secondary metabolic compounds include terpenoids, phenolics and alkaloids. Compounds that act as antimicrobial agents are phenol group including 2,3-dimethoxy-5-benzoquinon such as2,3-dimethoxy-5-methyl-benzoquinon, 2,6-diphenyl-benzoquinon and2,6-dimethoxy-benzoquinon. Compounds that act as antioxidants are a group of flavonoids that dihicalcone, chalcone, flavones, catechins, leucoanthocyanidins, flavonols, saltflavin, anthocyanidins.White turmeric extract 10mg/kg of materialable to suppress the growth of microbial in noddle up to 3 days.ABSTRAKSaat ini masyarakat menyadari betapa pentingnya memilih makanan yang sehat terutama kandungan zat gizi, segar dan tidak mengandung zat-zat yang berbahaya. Ulasan ilmiah ini menggunakan metode penelusuran literatur.Tujuan penulisan ini adalah memberikan informasi tentang kunyit putih (Curcuma zedoaria [Berg.] Roscoe) sebagai pengawet dan antioksidan untuk produk pangan. Kunyit putih (C. zedoaria) mengandung senyawa metabolik sekunder antara lain terpenoid, fenolik dan alkaloid. Senyawa yang berperan sebagai anti mikroba adalah kelompok fenol yaitu 2,3-dimetoksi-5-benzokuinon seperti 2,3-dimetoksi-5-metil-benzokuinon, 2,6-difenil-benzokuinon dan 2,6-dimetoksi-benzokuinon. Senyawa yang berperan sebagai antioksidan adalah kelompok flavonoid yaitu dihikalkon, kalkon, flavon, katekin, leukoantosiadin, flavonol, garam flavin, antosianidin. Ekstrak kunyit putih 10 mg per kg bahan mampu menekan pertumbuhan mikroba pada produk miehingga 3 hari. Kata kunci : kunyit putih, fenolik, pengawet, antioksidan, mie.

Pemanfaatan Limbah Padat Palm Kernel Cake (PKC) sebagai Sumber Karbon Aktif dengan Proses Kimia Haspiadi Haspiadi; Saibun Sitorus
Jurnal Riset Teknologi Industri Vol 10 No 1 Juni 2016
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Solid waste of Palm kernel cake (PKC) is a by product of oil extraction from palm nut pose a serious environmental problem in some factories of Palm Kernel Oil (PKO. Thererfore the research about utilization of palm kernel cake solid waste (PKC) as a source of activated carbon was performed. From this research is to know quality of activated carbon using palm kernel cake as a row material to compare with the SNI 06-3730-1995. The process was carried out is chemical activation method with in laboratory scale using two types activator, which is phosphoric acid and potassium hydroxide at six different concentration 2%, 4%, 6%, 8%, 10% and 12% respectively. Whereas, carbonization was held at temperature of 400oC during 120 minutes. The result indicated that the quality of activated carbon according to key parameters using the lowest concentration of activator fulfilling with SNI 06-3730-1995 was produced by H3PO4 6% with iodine adsorption capacity 769 mg/g. Meanwhile for activator KOH 10% according to key parameters using the lowest concentration of activator fulfilling with SNI 06-3730-1995 was produced by with condition of iodine adsorption capacity 778 mg/gABSTAKLimbah padat palm kernel cake (PKC) yang dihasilkan dari proses ekstraksi kernel merupakan permasalahan lingkungan yang serius dibeberapa industri yang mengolah Palm Kernel Oil (PKO). Oleh karena itu dilakukan penelitian untuk memanfaatkan limbah padat Palm Kernel Cake (PKC) sebagai sumber karbon aktif. Diharapkan dari penelitian ini dapat diketahui mutu karbon aktif yang dihasilkan dibandingkan dengan SNI 06 3730-1995. Proses pengolahan yang dilakukan secara kimia dalam skala laboratorium, menggunakan dua jenis aktivator yaitu H3PO4 dan KOH dengan konsentrasi 2%, 4%, 6%, 8%, 10% dan 12%. Karbonisasi dilakukan pada suhu 400 oC selama 120 menit. Hasil uji mutu karbon aktif yang dihasilkan berdasarkan parameter kunci dengan pertimbangan penggunaan bahan kimia dengan konsentrasi aktivator terkecil menunjukkan bahwa pengggunaan aktivator 6% H3PO4 memiliki daya serap terhadap iod sebesar (I2) 769 mg/g, bila dibandingkan dengan SNI 06 3730-1995 telah dapat memenuhi syarat mutu. Sedangkan penggunaan aktivator KOH 10% dengan pertimbangan penggunaan bahan kimia dengan konsentrasi aktivator terkecil memiliki daya serap terhadap iod sebesar 778 mg/g. Kata kunci : asam fosfat, kalium hidroksida, karbon aktif, limbah padat, daya serap iod, palm kernel cake

Identifikasi Komponen Senyawa Kimia Tandan Kosong Kelapa Sawit Kromatografi Gas - Spektrometer Massa (GC-MS) Eldha Sampepana; Saibun Sitorus
Jurnal Riset Teknologi Industri Vol 8 No 16 Desember 2014
Publisher : Balai Riset dan Standardisasi Industri Samarinda

Air Product, 2014, Cellulosic Biofuels (Pembakaran/Gasifikasi Lignin Hidrolisis). Air Products and Chemicals, Inc. http://www.airpro-ducts.co.id/industries/Energy/Bioenergy/Cellulosic-Biofuels/product-list/ com-bustiongasification-of-hydrolyis-lignin-cellulosic-biofuels.aspx?itemId =8F39-9214FA4A462FA14588FE4F 86D3C2, Diakses tanggal 27 Oktober 2014Alejandro R., L. Serranoa, A. Morala, A. Pereza dan L. Jimeneza, 2007, Bioresource Tehnology, 98 (3): 554-559.Andaka Ganjar, 2011, Hidrolisis Ampas Tebu Menjadi Furfural Dengan Katalisator Asam Sulfat, Jurnal Teknologi, Volume 4 Nomor 2, Desember 2011, 180-188Anindyawati, Trisanti, 2009, Prospek Enzim dan Limbah Lignoselulosa Untuk Produksi Bioetanol, Pusat Penelitian Bioteknologi-LIPI, CibinongAnnisa, Gina, 2012, Hidrodeoksigenasi Bio-Oil menggunakan katalis CoMo/C untuk Optimalisasi Produksi Alkana dan Alkohol, Skripsi Universitas Indonesia, Depok.Artati, K., Enny, E., Novia Margareta, H. Widhie Vissia, 2010, Konstanta Kecepatan Reaksi Sebagai Suhu Hidrolisa Selulosa Dari Ampas tebu dengan Katalisator Asam Sulfat. Ekuilibrum Volume 9 Nomor 1 Januari 2010 Hal. 1-4. ISSN 1412-9124Darnako, 1992, Potensi Pemanfataan Limbah Lignoselulosa Kelapa Sawit Melalui Bioonversi, Berita Penelitian Perkebunan, 2 (2) : 85 – 87.Dea, I. A., 2009, Kajian Awal Biokonversi Tandan Kosong Kelapa Sawit (TKKS) Menjadi Etanol Melalui Sakarifikasi dan fermentasi Alkoholik, Institut Teknologi Bandung, BandungDinas Perkebunan Provinsi Kalimantan Timur, 2013, Komoditi Kelapa Sawit, SamarindaFadiarwaty Diyah dan Susanto Herri, 2005, Penghematan Konsumsi Katalis Dalam Proses Hidrolisis Tandan kosong kelapa sawit Untuk Produksi Furfural, Jurnal Teknik Kimia Indonesia Volume 4 Nomor 3 Desember 2005 hal. 279 – 286Hambali, E., S. Mujdalipah, A. H. Tambunan, A. W. Pattiwiri dan Roy H. 2007, Teknologi Bioenergi, Agromedia Pustaka, Jakarta.Hidajati, Nurul, 2006, Pengolahan Tongkol Jagung Sebagai Bahan Pembuatan Furfural, Jurnal Ilmu Dasar Volume 8 No. 1, Universitas Negeri Surabaya. SurabayaIriani, P. I., 2009, Kajian Awal Biokonversi Tandan Kosong Kelapa Sawit (TKKS) Menjadi Etanol Melalui Skarifikasi dan Fermentasi Alkoholik, Diakses dari http://www.sith.itob.ac.id pada tanggal 16 April 2012.Juwita Rinna, Syarif Rizki Lailan, Tuhuloala Abubakar, 2012, Pengaruh dan Konsentrasi Asam Terhadap Sintesis furfural Dari Sekam Padi. Konversi, Volume 1 Nomor 1, Oktober 2012. Hal. 34 -38.Ketaren, S., 2005, Minyak dan Lemak Pangan., Universitas Indonesia Press, JakartaKirk, R. E., dan Othmer, D., 1995, Furan Derivatives : Supplement Encyclopedia of Chemical Technology, John Wiley & Sons. New YorkLewis, J. Richard., 2001, Condensed Chemical Dictionary Fourteenth Edition. John Wiley & Sons Inc. New York.Nist Standard Reference Data, 2011, 2-Furancarboxaldehyde, 5-methyl- Material Measturement Laboratory. The U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. AmericaOthmer dan Kirk, 1969, Furfural and other furan compounds,”encyclopedia of chemical Technology2nd. Ed., Vol.10Padil, Yelmida A., dan Masfika Candra, 2011, Optimasi Hidrolisis Tandan kosong kelapa sawit Dengan Ekstrak Abu Tks Menggunakan Rancangan Percobaan Response Surface Methode. Jurnal Sains Dan Teknologi 10 (1), Maret 2011: 42-46.Peby, Agrian 2010, Biomass to liquid: Proses Konversi tandan kosong sawit kelapa sawit menjadi biooil dengan metode pirolisis, Skripsi, Universitas Indonesia, DepokPurwito dan Firmanti, 2005, Pemanfaatan Limbah Sawit dan Asbuton Untuk Bahan Pencegah Seranggan Rayap Tanah: Departemen Pekerjaan Umum, BandungRohana Aulina Nova, Mardiah Elida dan Afrizal, 2013, Produksi Selulase Dari Aspergillus Niger Dan Kemampuannya Menghidrolisis Ampas Tebu, Jurnal Kimia Unand (ISSN No. 2303-3401), Volume 2 Nomor 2, Mei 2013Roliadi, H dan Fatriasari, W., 2011, Kemungkinan Pemanfaatan Tandan Kosong Kelapa Sawit Sebagai Bahan Baku Pembuatan Papan Serat Berkerapatan Sedang, Universitas Sriwijaya, PalembangSampepana, Eldha, Yustini Eka Paluphy, Renaldi Adhytia, Amiroh, 2013, Optimalisasi Proses Hidrolisis Furfural dari Tandan Kosong Kelapa Sawit, Balai Riset dan Standardisasi Industri Samarinda, SamarindaSugiarta, Karmila Dian, 2009, Prarancangan Pabrik Furfural Dari Sekam Padi Dengan Proses Quaker Oats Kapasitas 1.550 Ton Per Tahun, Jurusan Teknik Kimia Fakultas Teknik Universitas Muhammadiyah Surakarta, SurakartaSuharto, 2006, Pemanfaatan Limbah Tandan Kosong Sawit untuk Produksi Commercial Grade Furfural, Laporan Akhir Kumulatif – Program Penelitian dan Pengembangan IPTEK, LIPISunarko, 2007, Petunjuk Praktis Budi Daya dan Pengolahan Kelapa Sawit, Agromedia Pustaka, Jakarta.Sun, Y. dan Cheng, J., 2002, Hydrolysis of lignocellulosic materials for ethanol production: a review, Bioresource Technology, 83(1), 1-11Suryadi, H., T., Katsuragi, N., Yoshida, S. Suzuki, dan Y. Tani., 2000, Polyol production by culture of methanol utilizing yeast. Journal of Bioscience and Bioengineering 89 (3): -Taherzadeh, M. J., dan Karimi, K., 2007, Enzyme-based hydrolysis processes for ethanol from lignocellulosic materials: A review, BioResources, 2(4), 707-738Wahyuni, Susilowati Ari, Setyaningsih Ratna, 2004, Optimasi Produksi Xilitol Dengan Variasi Konsentrasi Hidrolisat Hemiselulosa Bagase Oleh Candida Tropicalis. Biofarmasi 2 (1): 29-34, Pebruari 2004, ISSN: 1693-2242Wijanarko Anondho, Witono Anton Johanes, Wiguna Satria Made, 2006, Tinjauan Komprehensif Perancangan Awal Pabrik Furfural Berbasis Ampas Tebu Di Indonesia, Journal Of The Indonesian Oil And Gas Community. Published By “Komunitas Migas Indonesia”, ISSN: 1829-9466Wijaya Mohammad, Noor Erliza, Irawadi Tedja Tun Dan Pari Gustan, 2008, Perubahan Suhu Pirolisis Terhadap Struktur Kimia Asap Cair Dari Serbuk Gergaji Kayu Pinus, Jurnal Ilmu Dan Teknologi Hasil Hutan 1(2): 73-77 (2008)Wilson, W.C., 1941,"Furan", Org. Synth, Coll. Vol. 1: 274

Pemanfaatan Abu Sabut Kelapa sebagai Katalis Basa dalam Pembuatan Biodiesel dari Minyak Biji Jarak Pagar (Jatropha curcas. L) saibun sitorus
Jurnal Riset Teknologi Industri Vol 9 No 1 Juni 2015
Publisher : Balai Riset dan Standardisasi Industri Samarinda

The research about utilization ash of coconut husk as source of base catalyst in aplication for reaction of transesterification from Jatropha curcas oil has been researched. Content of base compound in coconut husk ash was analyzed by AAS and acidy alkalimetry. The base catalyst was extracted using methanol, for transesterification reaction of Jatropha curcas oil. This method of biodiesel production by transesterification process used coconut husk ash catalyst by weight variation as much as 2%, 4%, 6%, 8% and 10% (w/w). Analysis of the quality of biodiesel is done with quality parameters acid number, iodine number, density, viscosity and water content in accordance with SNI 04-7182-2006 standards. The result of the research showed that potassium concentration as carbonat salt in the ash of coconut husk was 17,4% (w/w) and the conversion of biodiesel obtained from each catalyst in a row is 43,62%; 78,45%; 76,22%; 75,69% and 63,27% (w/w). Biodiesel optimum results obtained with the addition of the catalyst are 4% with density values of 0.86 (g / mL), the viscosity value of 3.23 (cSt), the value of water content 0.0352%, 0.12 acid number (mg KOH / g) and iodine number of 8.23 (g I2 / 100 g).The research about utilization ash of coconut husk as source of base catalyst in aplication for reaction of transesterification from Jatropha curcas oil has been researched. Content of base compound in coconut husk ash was analyzed by AAS and acidy alkalimetry. The base catalyst was extracted using methanol, for transesterification reaction of Jatropha curcas oil. This method of biodiesel production by transesterification process used coconut husk ash catalyst by weight variation as much as 2%, 4%, 6%, 8% and 10% (w/w). Analysis of the quality of biodiesel is done with quality parameters acid number, iodine number, density, viscosity and water content in accordance with SNI 04-7182-2006 standards. The result of the research showed that potassium concentration as carbonat salt in the ash of coconut husk was 17,4% (w/w) and the conversion of biodiesel obtained from each catalyst in a row is 43,62%; 78,45%; 76,22%; 75,69% and 63,27% (w/w). Biodiesel optimum results obtained with the addition of the catalyst are 4% with density values of 0.86 (g / mL), the viscosity value of 3.23 (cSt), the value of water content 0.0352%, 0.12 acid number (mg KOH / g) and iodine number of 8.23 (g I2 / 100 g).ABSTRAKPenelitian tentang pemanfaatan abu sabut kelapa sebagai sumber katalis basa pada aplikasi reaksi transesterifikasi minyak biji jarak pagar (Jatropha curcas. L) telah dilakukan. Karakterisasi kadar basa dalam sabut kelapa dilakukan dengan AAS dan alkalinitas. Katalis basa diperoleh dengan pengadukan abu sabut kelapa dalam metanol dan selanjutnya digunakan untuk reaksi transesterifikasi minyak biji jarak pagar (Jatropha curcas. L). Metode pembuatan biodiesel ini dengan transesterifikasi menggunakan katalis abu sabut kelapa dengan variasi berat sebanyak 2%, 4%, 5%, 6%, 8% dan 10% (b/b). Analisis kualitas dari biodiesel dilakukan dengan parameter mutu bilangan asam, bilangan iod, densitas, viskositas dan kadar air sesuai dengan standar SNI 04-7182-2006. Hasil penelitian menunjukkan bahwa kadar kalium dalam bentuk kalium karbonat dalam abu sabut kelapa sebesar 17,4% (b/b) dan konversi biodiesel yang diperoleh dari masing masing katalis berturut-turut adalah 43,62%; 78,45%; 76,22%; 75,69% dan 63,27% (b/b). Hasil optimum biodiesel diperoleh dengan penambahan katalis 4% dengan nilai densitas 0,86 (g/mL), nilai viskositas 3,23 (cSt), nilai kadar air 0,0352%, bilangan asam 0,12 (mg KOH/g) dan bilangan iod sebesar 8,23 (g I2/100 g). Kata kunci : Abu sabut kelapa, biodiesel, transesterifikasi, minyak biji jarak pagar(Jatropha curcas. L)

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

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