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-, Bohari
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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PEMBUATAN MEMBRAN SILIKA DARI FLY ASH BATUBARA UNTUK PENURUNAN INTENSITAS WARNA DARI LIMBAH CAIR INDUSTRI SARUNG SAMARINDA Pratiwi, Kartika; -, Bohari; Gunawan, Rahmat
JURNAL ATOMIK Vol 3 No 1 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Synthesis of silica membrane from coal fly ash to decrease the color intensity of the liquid waste of sarung Samarinda industry has been done. The extraction of silica from coal fly ash by using the sol-gel process, and for silica membrane by using mixture of PVA (Poly Viny Acohol) and PEG (Polyethylen Glycol. Decrease in color intensity were analyzed using UV-Visible Spectrofotometer and the morphology of the membrane was observed by SEM-EDX. Based on the results from the spectrofotometer the concentration of the liquid waste berofe is 52.92 Unit Pt.Co and after decolorization is 25.04 Unit Pt.Co. The result show that decreasing are concentration is 52.68%, and the results the Scanning Electron Microscope (SEM)-EDX on the membrane after decolorization of liquid waste show distribution of pores in the membrane experiencing changes caused by new particles covering membrane be expected from liquid waste, and the elements are C, O, Na, Al and Si.
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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Abstract

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.
Co-Authors Agus Supriyanto Alimuddin - Kartika Pratiwi RAHMAT GUNAWAN