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Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman
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EFFECT OF TIME VARIATION ON XYLENE USING ACTIVE CARBON FROM WASTE OF BANANA STEM (Musa paradisiaca L) Ashari, Ayu Wanti; -, Alimuddin; Sitorus, Saibun
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Test of activated carbon adsorption ability of banana stem waste (Musa paradisiaca L) on xylene has been carried out. In the characterization of activated carbon Scanning Electron Microscopy (SEM) was used to show the morphological differences in activated carbon after activation and before activation while xylene adsorption using a UV spectrophotometer with variations in the time of adsorption. The optimum xylene adsorption time was obtained on the weight of 0.4 gram adsorbent, the concentration of xylene 40 ppm was 45 minutes, the adsorption capacity was 1.772 mg/g.
THE MANUFACTURING OF SILICA GEL FROM BAMBOO LEAF ASH (Dendrocalamus asper (Schult. f) Backer ex Heyne) AND THE APPLICATION FOR ADSORPTION Cd (II) ION -, Yasrin; -, Alimuddin; Panggabean, Aman Sentosa
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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The research about silica gel manufacturing from bamboo leaf ash (Dendrocalamus asper (Schult.) Backer ex Heyne) and the application for Cd (II) ion adsorption has been done. The adsorption of Cd (II) ion done by some varieties, such as pH, concentration, and contact time. The result of the research showed the optimum pH was 8, the optimum concentration was 4 ppm and the contact time was 60 minutes. The adsorption capacity was 0.388 mg/g and the percentage of recovery was 93.44%.
MODIFICATION OF ADSORBEN SILICA FROM RICE HUSK ASH WITH CHITOSAN TO ADSORPTION ION MANGANESE (TOTAL) Fauzi, Akhmad; -, Alimuddin; Widodo, Nanang Tri
JURNAL ATOMIK Vol 5 No 2 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Adsorbent silica from rice husk ash supported by chitosan can be used to adsorb Mn (Total) metal. The adsorbent is regulated by adjusting the composition of 65% silica and 35% chitosan. The characteristics of the silica-chitosan adsorbent and the adsorbent interaction with Mn (Total) are believed to be based on Fourier Transform Infared (FTIR) data. The concentration of Mn (Total) ion after adsorption is determined by Atomic Absorption Spectrophotometer (AAS). The results showed optimum pH at pH 5 percentage adsorption 79.45% and optimum contact time at 60 minutes with adsorption percentage 96.78%, and obtained chitosan-silica adsorption capacity of Mn (Total) ions of 1.0349 mg/g.
DETERMINATION OF PARAMETER QUALITY OF GROUND WELL WATER USING ADSORBENT FILTER FROM RICE HUSK ASH Said, Yahya; -, Alimuddin; Gunawan, Rahmat
JURNAL ATOMIK Vol 6 No 1 (2021)
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Determining the parameters of the quality of well water in Mugirejo, Sungai Pinang, Samarinda, using an adsorption filter from rice husk ash, has been carried out. Determination of the optimum flow rate and the level of each water quality parameter BOD, TSS and levels of metals (Pb, Fe, Mn). Based on the results of the filtration process in well water samples showed that the effect of the flow rate obtained the optimum flow rate of 1 hour per liter against decreasing levels of BOD, TSS and levels of metals (Pb, Fe and Mn) of 8.1, 17.28 mg/L O2, 1.4 mg/L, 68 mg/L, ND (No Detection), 0.0012 µg/mL and 0 µg/mL. For the flow rate of ½ hour per liter against decreases in BOD, TSS and levels of metals (Pb, Fe and Mn) respectively at 8.0, 30.52 mg/L O2, 2.01 mg/L, 46 mg/L, 0 µg/mL, 0.0109 µg/mL and 0.021 µg/mL.
ANALISIS KADAR ION TIMBAL (Pb) DAN ION KROMIUM (Cr) PADA RAMBUT PEKERJA PERBENGKELAN DI KOTA SAMARINDA -, Sugiarti; Gunawan, Rahmat; -, Alimuddin
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Telah dilakukan penelitian ini yang bertujuan untuk mengetahui kadar ion timbal dan ion kromium pada rambut pekerja perbengkelan dengan variasi umur dan lama bekerja dengan kadar ion timbal dan ion kromium pada rambut pekerja perbengkelan. Rambut yang sudah dikumpulkan dicuci kemudian diabukan dan dihomogenkan kemudian dianalisis dengan Atomic Absorption Spectrophotometer (AAS). Panjang gelombang untuk analisis logam timbal 283,3 nm dan untuk logam kromium 357,9 nm. Hasil menunjukkan analisis kadar ion timbal sampel pada rambut pekerja bengkel terendah 3,892 (mg/kg) yang tertinggi 48,814 (mg/kg) dan untuk kadar ion kromium sampel rambut pada pekerja bengkel terendah 1,578 (mg/kg) yang tertinggi 36,884 (mg/kg). Berdasarkan uji statistik analisis korelasi yang berhubungan positif umur dan lama bekerja dengan kadar ion timbal dan ion kromium pada rambut pekerja perbengkelan. Dengan Koefisien determinan besarnya kadar ion timbal berdasarkan hubungan lama bekerja 98,2 % dan   untuk ion kromium 97,7 %,  dan koefisien determinan berdasarkan hubungan umur dengan kadar ion timbal 78,2 % dan ion kromium 83,2 %.
PEMBUATAN BIODIESEL DARI LEMAK IKAN PATIN(Pangasius sp) DENGAN RADIASI GELOMBANG MIKRO Tanjung, Albayssag Faisal; -, Alimuddin; Yusuf, Bohari
JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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The research about made biodiesel from fat of patin fish (Pangasius sp) as raw material and known influence time exposure microwave radiation to concentration biodiesel that was produced have been done.Fat of patin fish heated to get oil extract. The oil extract was refluxed with methanol as reactant and H2SO4 as catalyst for 120 minute. Then transesterified with methanol as reactant and NaOH as catalyst with different time that was for 2, 4, 6, 8, and 10 minutes. The high product of biodiesel is 87,2 b/v that was exposured microwave radiation for 8 minutes. To knew kind of methyl ester in biodiesel used GC-MS and the high concentration of methyl ester in biodiesel is methyl oleat with concentration 24,74%.
KARAKTERISASI BIOIDIESEL LEMAK IKAN BAUNG (MYTUS NEMURUS) DENGAN KATALIS CaO DARI CANGKANG TELUR AYAM Pali, Mendriyani; -, Alimuddin; -, Daniel
JURNAL ATOMIK Vol 1 No 2 (2016)
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The research abaout the use ash of eggchell as source of base catalyst in application for reaction of transseterification from fish baung fat. Conten of base compound in eggchell ash was analyzed by AAS and acidy alkalimetry. The result of the research showed that calcium concentration as carbonat calcium salt in the as of eggchell was 74,8% (w/w). weight variation on the eggchell as catalyst transeterification process is performed to find the optimum reqaction condition if the biodiesel production. Aqquisition of the highest biodiesel yield at catalyst weight of 2,5 % was 96.7663 %. The composition of fatty acid of fish baung fat from transesterification result it is determinate with FT-IR and GC-MS. GC-MS analysis showed that fatty acids are the dominant constituent in the biodiesel is methyl oleate in the amount of 39,39%.
PENURUNAN INTENSITAS WARNA REMAZOL RED RB 133 DALAM LIMBAH BATIK DENGAN ELEKTROKOAGULASI MENGGUNAKAN NaCl Fatimah, Nurul; -, Alimuddin; Gunawan, Rahmat
JURNAL ATOMIK Vol 3 No 1 (2018)
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A decrease in the intensity of dye Remazol Red RB 133 in batik waste with electrocoagulation method using electrodes aluminum and stainless steel has been done. Analysis was performed using a spectrophotometer Visibel. The results showed that the optimum effect of adding NaCl at a concentration 7 g/L with degradation was 84.95% percent, optimum contact time 60 minutes with degradation was 86.36%, stronger optimum voltage 12 Volts with degradation was 94.31% and pH optimum at pH 4 with degradation was 96.86%. Electrocoagulation in optimum condition dye Remazol Red RB 133 produces an average degradation was 96.41%, and electrocoagulation of batik waste obtained an average degradation was 91.38%.
ANALISIS LOGAM Fe, Cu, Pb, DAN Zn DALAM MINYAK PELUMAS BARU DAN BEKAS MENGGUNAKAN X-RAY FLUORESCENCE Supriyanto, Agus; -, Alimuddin; -, Bohari
JURNAL ATOMIK Vol 3 No 1 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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A research on the analysis of metals Fe, Cu, Pb, and Zn in lubricating oils new Turbolube 32 and used using X-Ray Fluorescence aims to determine the differences in levels of Fe, Cu, Pb and Zn in the lubricating oil of new and used and know their the effect of duration of use of used lubricating oil to elevated levels of metals Fe, Cu, Pb and Zn in compressors operating system F4K-3. Lubricating oils are used to reduce friction and wear two metal surfaces, the existence and the increase of heavy metals in lubricating oils indicated the occurrence of wear and tear on the engine compressor. From the research, it can be concluded the difference between new and used lubricating oil, lubricating oil does not contain metal new Fe, Pb and Zn but contains Cu amounted to 25.36 mg / L. In Used oil contains metals Fe, Cu and Zn with elevated levels of various metals iron (Fe) 6.243 mg / L, metal Copper (Cu) 41.260 mg / L and zinc (Zn) 32 469 mg / L except metals Lead (Pb) there is no difference between New and Used Lubricating Oil is still 0:00 mg / L or below the Lower Limit of Detection XRF 5.3 mg / L. using Simple Linear Regression correlation coefficient lows of iron (Fe) 0913 and the highest zinc (Zn) 0969 this suggests there is a relationship between duration of use of lubricating oil in the compressor with elevated levels of metals iron (Fe), copper (Cu) and Zinc (Zn). Improved metals in used lubricating oil indicates the wear and tear on the compressor engines except metal Lead (Pb) no elevated levels of metals.
DECREASE THE LEVEL OF LINEAR ALKYLBENZENE SULFONATE (LAS) WITH USING RICE HUSK ASH Hidayah, Amala Nur; -, Alimuddin; Subagyono, RR Dirgarini Julia Nurlianti
JURNAL ATOMIK Vol 5 No 1 (2020)
Publisher : Jurusan Kimia FMIPA UNMUL

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Penelitian tentang penurunan kadar linear alkylbenzene sulfonate (LAS) dalam limbah laundry menggunakan abu sekam padi telah dilakukan. Tujuan dari penelitian ini untuk mengetahui kinerja adsorpsi dari abu sekam padi dengan optimasi pH, berat, waktu kontak, konsentrasi dan kapasitas pada proses adsorpsi. Rendemen abu sekam padi yang diperoleh sebesar 28,58 %. Kondisi optimum penjerapan pada 2 mg/L linear alkylbenzene sulfonate (LAS) sebanyak 150 mL menggunakan 0,4 g abu sekam padi yaitu pada pH 5 dalam waktu 30 menit dengan kapasitas adsorpsi maksimum 3,894 mg/g. Hasil penurunan kadar LAS pada limbah laundry dari 1,8661 mg/L menjadi 0,465 mg/L ppm yaitu sebesar 75,013 %.
Co-Authors -, Bohari -, Yasrin Aditya, Roy Agus Supriyanto Akhmad Fauzi Aman Sentosa Panggabean Ashari, Ayu Wanti Asri Usman Azhar Seli Apriani, Azhar Seli Bohari Yusuf Chairul Saleh Daniel -, Daniel Dewi Purwati Dewi Sundari, Dewi Erwin - Harjuna, Hariani Hasanuddin, Basri Hidayah, Amala Nur Indri Ayu Lestari, Indri Ayu Malik, Abdilla Miu, Agustinus Mustafidah -, Mustafidah Nanang Tri Widodo Nur Fadhila Amri Nurul Fatimah Pali, Mendriyani RAHMAT GUNAWAN Rudi Kartika, Rudi Saibun Sitorus Said, Yahya Siti Nurliana, Siti Subagyono, RR Dirgarini Julia Nurlianti Sugiarti - Tandi, Harsen Tanjung, Albayssag Faisal Tiro, M. Arif Yogie Henry Payung, Yogie Henry