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All Journal Jurnal Sains Dasar Jurnal Harpodon Borneo PROSIDING SEMINAR KIMIA Jurnal Kimia Mulawarman Molecular and Cellular Biomedical Sciences (MCBS) Indonesian Journal of Chemistry JURNAL ATOMIK
Bohari Yusuf
Jurusan Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Mulawarman
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Education Energy Environmental Science Immunology & microbiology Medicine & Pharmacology Neuroscience

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Cellulose production from modified cassava skin 2-mercaptobenzotiazole for controlling cadmium (II) metal pollution Yusuf, Bohari; Alimuddin, Alimuddin; Saleh, Chairul; Rahayu, Desy Ridho
Jurnal Sains Dasar Vol 3, No 2 (2014): October 2014
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (965.166 KB) | DOI: 10.21831/jsd.v3i2.4143

Abstract

The research study of cadmium (II) metal ion adsorption in a solution by 2-mercaptobenzotiazole modified cellulose and unmodified cellulose had been done. The aims of this research are to know the ability of 2-mercaptobenzotiazole modified and unmodified celluloses for adsorbing cadmium (II) metal ion with the composition of modification. The modification processes of cellulose were done by the composition variation between cellulose and MBT of 1:1, 1:2, and 1:3. The adsorption process of metal ions by 2-mercaptobenzotiazole modified cellulose were done by shaking at pH 3, 4, 5, 6, 7, 8, and 9 with the effect of metal ions concentration of 0.05; 0.1; 0,15; 0,2, and 0,25 mg/L. The analysis of functional groups of cellulose-MBT and cellulose unmodified was using FTIR Spectrophotometer. The analysis of cadmium (II) concentration metal ions as cadmium metals were done by atomic absorption spectrophotometer (AAS). The result of this research showed that on the functional groups which derived from FTIR spectrum, there was some similarity of functional groups between unmodified cellulose and MBT-cellulose which could be seen from the wave length of C-S stretching at 663.51 cm-1; functional group of C-H aromatic stretching at 3749.62 cm-1; functional group of C-N at 1319.31 cm-1, and functional group of C=N that came from diazole  functional group (-N=C-S) which could be seen at 1597.06 cm-1. The optimum adsorption metal ions cadmium by MBT-cellulose happened at 1:2 composition modification, pH 4, and at the concentration of 0.2 mg/L.   Key words: adsorption, modified, cadmium (II) metal ion, cellulose, 2-merkaptobenzotiazole
PEMANFAATAN BATU PADAS DALAM MENGADSORPSI LOGAM BERAT Pb (II) DI PERAIRAN Hutapea, Tri Paus Hasiholan; Yusuf, Bohari; Purba, Ritson
Jurnal Harpodon Borneo Vol 9, No 2 (2016): Volume 9 No 2 Oktober 2016
Publisher : Jurnal Harpodon Borneo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.121 KB) | DOI: 10.35334/harpodon.v9i2.166

Abstract

The research of increasing adsorption of the heavy metal iron by padas stone that activated by NaOH 4 N. The Result of survey show that acidity surface and capacity adsorption of padas stone that activited by a NaOH 4 N higher than padas stone which unactivited. Which acidity of surface and higher adsorption capacity aconed by padas stone that activited by NaOH 4 N namely 0,100 mmol/gram. In this research has show the increasing of padas stone adsorption to the ion heavy iron metal. Kata kunci : stone of padas ; adsorption ; Heavy metal ; Pb (II)
PEMANFAATAN BATU PADAS DALAM MENGADSORPSI LOGAM BERAT Pb (II) DI PERAIRAN Tri Paus Hasiholan Hutapea; Bohari Yusuf; Ritson Purba
Jurnal Harpodon Borneo Vol 9, No 2 (2016): Volume 9 No 2 Oktober 2016
Publisher : Fakultas Perikanan Dan Ilmu Kelautan Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.12 KB) | DOI: 10.35334/harpodon.v9i2.166

Abstract

The research of increasing adsorption of the heavy metal iron by padas stone that activated by NaOH 4 N. The Result of survey show that acidity surface and capacity adsorption of padas stone that activited by a NaOH 4 N higher than padas stone which unactivited. Which acidity of surface and higher adsorption capacity aconed by padas stone that activited by NaOH 4 N namely 0,100 mmol/gram. In this research has show the increasing of padas stone adsorption to the ion heavy iron metal. Kata kunci : stone of padas ; adsorption ; Heavy metal ; Pb (II)
KAJIAN KUALITAS UDARA KOTA SAMARINDA DITINJAU DARI ASPEK AKTIVITAS KENDARAAN BERMOTOR Bohari Yusuf
PROSIDING SEMINAR KIMIA SEMINAR NASIONAL KIMIA 2014
Publisher : PROSIDING SEMINAR KIMIA

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Abstract

Declining air quality and increasing number of vehicles at Samarinda City indicating that there is strong relationship between both. Research was done to understand current air pollution level in Samarida as ISPU Criteria and relationship air pollutant level with number of vehicles activities. Research was done by counting number of vehicles and collecting air samples at five crowded traffic intersection. Air samples tested in laboratory for ISPU specified air pollutant level, which are CO, NO2, SO2, O3 and dust (PM 10). Analysis of correlation was conducted to understand relationship between numbers of vehiclesand air pollutant level. Average level of air pollutant and their ISPU value were CO 2803ug/m3 (28.03; Good), NO2 47.9ug/m3 (-; Good), SO2 53.0ug/m3 (33.12; Good), O3 31.3ug/m3 (13.04; Good) and Dust 36.1ug/m3 (36.1; Good). There was positive correlation between numbers of vehicles and air pollutant level with coefficient >0.9. Therefore, limit numbers of vehicles before limit air pollutant level passed could be predicted. Prediction of limit numbers of vehicles based on CO level were 31217 units, NO2 level were 54186 units, SO2 level were127692 units, O3 level were 48672 units and dust level were 26371 units. Levels of CO, NO2, SO2, O3 and dust (PM 10) at Samarinda City still comply PP No. 41 year 1999 with Good as ISPU criteria average. Increase in number of vehicle will increase air pollutant levels too.Keywords: Air, Level, Pollutant, ISPU, Quality
PEMANFAATAN ARANG AKTIF DARI KULIT DURIAN (Durio zibethinus L.) SEBAGAI ADSORBEN ION LOGAM KADMIUM (II) Marlinawati -; Bohari Yusuf; Alimuddin -
JURNAL KIMIA MULAWARMAN Vol 13 No 1 (2015)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The research of adsorption cadmium (II) metal ions in the solution by activated carbon from durian peel has been done. Adsorption process is done by using a variation of pH (1, 2, 3, 4, 5 and 6), variation of contact time (15, 30, 45, 60, 75 dan 90 menit), variation of the concentration (20, 30, 40, 50 dan 60 mg/L). Analysis of metal ion concentration of cadmium (II) used by Atomic Absorption Spectrophotometer (AAS). The results of this research shows that the optimum condition was achieved at the pH value of 4 and the contact time of 60 minutes. Metal ion adsorption of cadmium (II) by activated carbon from durian’s peel at pH value of 4 and the contact time of 60 minutes can achieve 64,540%. Metal ion adsorption capacity of cadmium (II) adsorbed by activated carbon from durian’s peel can achieve 0,4951 mg/g.Keywords : Adsorption, Activated Carbon, Durian Peel, Metal Ions Cadmium (II)
Analisis Kadar Ion Pb2+ Pada Kangkung Darat (Ipomea Reptans Poir) Yang Diberi Air Lindi Dari Tpa Sampah Bukit Pinang Samarinda Hamsina Hamsina; Bohari Yusuf; Erwin Erwin
JURNAL KIMIA MULAWARMAN Vol 15 No 1 (2017)
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.v15i1.545

Abstract

The Research to determine the levels of Pb ion on swamp cabbage (Ipomoea reptans Poir) where each of media cropping given variation of leachate volume from TPA Bukit Pinang Samarinda for every 10 kg of soil has been carried out. Swamp cabbage was analyzed in the roots, stems and leaves at the age of 2 weeks to 4 weeks. The levels of Pb2+ ion was determined by dry destruction method, then measured by atomic absorption spectrophotometry. Pb2+ ion was accumulated on the ground kale plants. The highest levels of Pb2+ ion was contained in the roots of ground kale plants on media cropping which added 1.5 L of leachate at the age of 3 weeks of 2.0642 mg / kg wet weight. The lowest level of Pb2+ ion was contained in the leaves of control plants at the age of 2 weeks that was 0.0177 mg / kg wet weight.
MODIFIKASI RESIN Ca-ALGINAT DENGAN ABU JERAMI PADI SEBAGAI MATERIAL PENGISI KOLOM PADA TAHAPAN PRAKONSENTRASI ANALISA ION Mn (II) SECARA OFF- LINE Adhi Surya Pranata Surya Pranata; Bohari Yusuf; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 12 No 1 (2014)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The modification of resin Ca - Alginate with rice straw ash as a column filler material for preconcentration step of Mn(II) ion. Has been done Preconcentration method was used by off-line method, water samples were passed through the column and eluted with 0.1 M H2SO4. The eluate was taken and detected by using Spectrophotometer UV-Visible. Optimum composition of modified resin Rice straw ash - Ca - Alginat were at 1% Na - Alginate, 0.1 M CaCl2, and 0.5 g rice straw ash. The result of research shown the optimum condition of retention capacity ion Mn(II) was 0.08211 mg Mn / gr resin. The best sorption at pH 2, and optimum condition of eluent concentration 0.1 M H2SO4, sample volume 12 mL and eluent volume was 5 mL. The analytical performance of this method was good for determination of ion Mn(II) that could be evaluated by limit of detection about 0.7727 mg/L with the reproducibility level shown by the precentage of the coefficient variance was 1.179 %. This method could be applicated to determine ion Mn(II) at the natural water samples from Mahakam river with a recovery percentage of > 95 %, used spike method that shown this resin is good to using at preconcentration stage determination of ion Mn(II).
PEMANFAATAN TANAMAN PETUNIA UNGU (Ruellia simplex C.) SEBAGAI PENYERAP LOGAM TIMBAL (Pb) PADA MEDIA TUMBUH TANAH Mutia Wulandari; Alimuddin -; Bohari Yusuf
JURNAL KIMIA MULAWARMAN Vol 10 No 2 (2013)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

Has been done a research concerning the use of Petunia Ungu (Ruellia simplex C.) plants as an absorbent lead metal (Pb) in the soil growing medium. The research almed to determine the levels of lead metal in petunia ungu plants and determine the effect of variations of concentrations also to determine the effect of absorption time in plants during planting petunia ungu 1, 2, 3 and 4 weeks then petunia ungu planted in the soil as the growing that was added a solutions of lead respectively 0, 25, 50, 75 and 100 mg/L. A soil sample preparation was conducted by wet digestion method and petunia ungu plants by dry digestion method. Metal levels of lead in the soil samples and petunia ungu plants was measured by atomic absorption spectrophotometer at wavelengths of 283,3 nm. The result of research showed that petunia ungu plants can absorb lead metal, the average levels of lead metal in petunia ungu plants consist of 0 ppm 1, 2, 3 and weeks 1,2303; 1,3190; 1,5064 and 1,6915 mg/Kg. 25 ppm 2,1779; 3,0426; 3,4145 and 3,3643 mg/Kg. 50 ppm 3,1317; 3,4316; 3,8689 and 4,2841 mg/Kg. 75 ppm 3,1179; 4,6695; 6,5676 and 6,6828 mg/Kg. 100 ppm 2,5205; 3,6302; 5,4442 and 6,9167 mg/Kg. beside that a lead metal content in the soil as a growing medium decreased.
PERBANDINGAN KINERJA ANALITIK HASIL PENENTUAN ION LOGAM Pb DENGAN MENGGUNAKAN SPEKTROFOTOMETER SERAPAN ATOM DI BERBAGAI LABORATORIUM SAMARINDA Arifin Syam Surya; Bohari Yusuf; Aman Sentosa Panggabean
JURNAL KIMIA MULAWARMAN Vol 19 No 1 (2021)
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.v19i1.909

Abstract

The study about the comparison of analytical performance of the determination of Pb metal ions using Atomic Absorption Spectrophotometer in various laboratories in samarinda has been conducted. The validated methods are linearity, detection limits, quantity and precision limits. The results showed, a standardized regression test obtained by laboratory A, a value of R2 ≥ 0.4103, laboratory B a value of R2 ≥ 0.983 and laboratory C, a value of R2 ≥ 0.000. The detection limit found at laboratory A was 0.6728 µg/L, laboratory B was 0.1989 µg/L and laboratory C was 0.0001 µg/L. The quantization limit obtained by laboratory A was 0.6817 µg/L, laboratory B was 0.6063 µg/L and laboratory C was 0.0001 µg/L. The precision test of laboratory A was 7.2208, laboratory B was 5.4557 and laboratory C was 0,000. The result of determining Pb of gas station soil samples in laboratory A is 0.737 µg/L and laboratory B is 0.391 µg/L, so that means they have exceeded the quality standards set by the Indonesian National Standard (INS).
ADSORPSI LOGAM KADMIUM (Cd) OLEH ARANG AKTIF DARI TEMPURUNG AREN (Arenga pinnata) DENGAN AKTIVATOR HCl Indri Ayu Lestari; Alimuddin -; Bohari Yusuf
JURNAL KIMIA MULAWARMAN Vol 12 No 1 (2014)
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

The adsorption of cadmium (Cd2+) by palm shell carbon (Arenga pinnata) activated carbon have been researched. This research is aim to find the effects of pH value, contact time and concentration. In this research, the variations of pH value was (2 – 7), contact time (5 – 70 minutes) and concentration (1,5 – 3,5 mg/L) were applied. The determination of cadmium concentration used an Atomic Absorption Spectrophotometer (AAS). The result of this research shows that pal shell activated carbon could adsorp metal ion Cd 2+ . The optimum condition was achieved at the pH 3 with a capacity factor of adsorbent was 2,372 mg/L or 94,92%, contact time was 30 minutes with a capacity factor of adsorbent was 2,327 mg/L or 93,12% and concentration was achieved at the concentration 3,5 mg/L with a capacity factor of adsorbent was 3,321 mg/L or 94,91%.Keywords: adsorption, actived carbon, palm shell, metal ions Cd 2+
Co-Authors Adhi Surya Pranata Surya Pranata Adhi Surya Pranata Surya Pranata, Adhi Surya Pranata Surya Agustin Pratiwi, Agustin Agustinus Miu Albayssag Faisal Tanjung Alimuddin - Alimuddin - Alimuddin Alimuddin Alimuddin Alimuddin Aman S Panggabean Aman S Panggabean, Aman S Aman Sentosa Panggabean Andi Sahriani Anton Rahmadi Apri Nuranda Arifin Syam Surya Arsyik Ibrahim Chairul Saleh Desy Ridho Rahayu Erwin Erwin Fenny Dian Lestari Finqo Aprianto Firzan Nainu Hamsina Hamsina Herman Herman Indri Ayu Lestari Indri Ayu Lestari, Indri Ayu Islamudin Ahmad Khasanah, Manja’a Laode Rijai Linda Ajang Linda Ajang, Linda Linda Yuniar Astria Marlinawati - Mirhansyah Ardana Mutia Wulandari RAHMAT GUNAWAN Rahmat GUnawan Rahmat Gunawan Rani Novia Ulya Ritson Purba Ritson Purba, Ritson Rudi Kartika, Rudi Selvi Jumiatul Astati Septiana, Rientha Siti Nurliana Siti Nurliana, Siti Tangke Veronika Tri Paus Hasiholan Hutapea, Tri Paus Hasiholan