Noor Hindryawati, Noor
Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan alam, Universitas Mulawarman

Published : 23 Documents
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PREPARATION OF SPENT BLEACHING EARTH-SUPPORTED CALCIUM FROM LIMESTONE AS CATALYST IN TRANSESTERIFICATION OF WASTE FRYING OIL

Jurnal Bahan Alam Terbarukan Vol 6, No 1 (2017): June 2017 [Nationally Accredited]
Publisher : Semarang State University

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Abstract

An investigation was conducted on palm oil refinery waste-spent bleaching earth (POR-SBE), POR-SBE supported by calcium as catalysts for methyl esters production through transesterification process using waste frying oil. The catalysts showed longer lasting activity than the traditional alkali catalysts. The optimum conditions for the process were: Ca-POR-SBE catalyst amount 7 %; methanol to oil molar ratio 12:1; and a reaction duration is 4 h. The process was able to transesterify oil to methyl esters at 96.8 % conversion at 65 °C. The catalysts were easily separated from the reaction mixture and the final product met selected biodiesel fuel properties in accordance with European Standard EN 14214.

JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research on the synthesis of activated carbon from jengkol shells (Pithecellobium lobatum) with the help of ultrasonic waves as an electrochemical energy storage material has been done. The activated carbon from jengkol shells is characterized by surface area using blue methylene method and pore morphology with SEM (Scanning Electron Microscope) instrument. The characterization results show that the active carbon with ultrasonic wave exposure has a larger surface area of 181.3693 m2/gram than the activated carbon without exposure to ultarsonic waves of 178.0290 m2/gram. The SEM results in activated carbon with ultasonic wave exposure indicate that the pore distribution is more evenly distributed, the number of pores more, and the pore size tends to be smaller, whereas in the activated carbon without the exposure of larger and slightly larger portions of ultrasound waves. The optimum value of capacitance on activated carbon without and with ultrasonic wave exposure of and 6.97 μF/gram and 5.21 μF/gram.

VALIDASI METODE RAPID TEST DALAM PENENTUAN TOTAL MOISTURE, ASH CONTENT, CALORIFIC VALUE (AR) PADA BATUBARA TERHADAP STANDAR ISO UKURAN 3 MM PT. KALTIM PRIMA COAL

JURNAL ATOMIK Vol 1 No 2 (2016)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Penelitian validasi metode rapid test dalam penentuan total moisture, ash content, calorific value (as received) pada batubara terhadap standar ISO (International Organization for Standardizations) dengan ukuran 3 mm (studi kasus di PT. Kaltim Prima Coal) telah dilakukan. Tujuan penelitian ini adalah mengetahui perbedaan pada total moisture, ash content, calorific value jika dilakukan dalam basis (ar) dan mengetahui hasil jika batubara yang digunakan dalam operasional berukuran 3 mm. Berdasarkan penelitian yang telah dilakukan dengan menggunakan batubara ukuran 3 mm diperoleh hasil pada total moisture dan ash content untuk batubara ini tidak terdapat perbedaan dan dapat digunakan dalam operasional laboratorium, sedangkan pada calorific value terdapat perbedaan pada batubara ini. Dalam penentuan ini harus tetap memperhatikan range varian dari nilai reproducibility pada setiap parameter batubara.

ACTIVATION OF ZEOLITE WITH ULTRASONIC WAVE FOR ADSORPTION RECTIVE YELLOW 86 ON SAMARINDA WASTE WOVEN

JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The research about activation of natural zeolite with variation concentration HCl for adsorption reactive yellow 86 from waste liquid woven Samarinda has been conducted. The activation of zeolite was prepared with two way, by mechanicalstirring and ultrasonic assisted. From the X-Ray Diffraction (XRD) result showed that natural zeolite activated with ultrasonic (NZA-U) has 38 % composition of SiO2, while natural zeolite activated with mechanical stirring (NZA-MS) is 21 %. Surface area analysis using methylene blue shows for NZA-U is 25 m2/g and 24 m2/g for NZA-MS. The results on adsorption of reactive yellow 86 from waste liquid woven Samarinda using spectrophotometer visible on wavelength 417 nm shows the optimum condition adsorption on time contact60 minutes and concentration HCl 3 M, with percent of adsorption is 56.14 % for NZA-U and 53.93 % for NZA-MS

JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Spent bleaching earth (SBE) as adsorbent of Pb2+ ion, through oil extraction process and continued by acid activation has been studied, this process assisted by ultrasonic wave in 30, 60 and 90 minutes reaction time. Based on the results analysis of X-Ray Flourescence (XRF), the reaction time of  30, 60 and 90 minutes showed an increase of SiO2 were 37.802 %, 42.374 % and 38,793 %. From the surface area with method methylene blue adsorption showed the surface area of DSBE-A 30, 60 and 90 were 34.3057 m2/g, 36.3375 m2/g and 35.8893 m2/g, respectively. XRD analysis showed the type of DSBE-A 60 was rectorite mineral with chemical compound was Na.Al4(Si,Al)8.O20.(OH)4.H2O and has a crystallinity 53.93%. Optimum conditions of DBSE-A 60 to adsorb Pb2+ ion in contact time was at 80 minutes, pH 3 and 20 ppm of Pb2+ ion concentration with adsorbtion efficiency up to 46.04 % and the optimum capacity of DSBE-A 60 to adsorb Pb2+ ion was 0.9209 mg/g.

ANALISIS KADAR LOGAM Pb, Mn dan KANDUNGAN PROTEIN PADA DAGING UDANG WINDU (Penaeus sp.) YANG DIAMBIL DIPERAIRAN SUNGAI DONDANG KECAMATAN MUARA JAWA

JURNAL ATOMIK Vol 3 No 1 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

Research on metal concentration of Pb, Mn and protein content in windu shrimp’s meat (Penaeus sp.) analysis in Dondang river, Muara Jawa have been done. This research is aimed to determine the concentration of heavy metal Pb, Mn and concentration of protein inside windu shrimp based by size and different sampling location. Concentration of heavy metal Pb, Mn and protein are correlated using Least Square method. Concentration of heavy metal Pb and Mn are analyzed by using AAS (Atomic Absorption Spectrophotometry) and concentration of protein are analyzed by using Kjeldahl method. Result of this research is the concentration heavy metal Pb and Mn in sampling point 1 in average concentration are 0.556 mg/L and 0.463 mg/L, sampling point 2 are 0.790 mg/L and 0.738 mg/L, sampling point 3 are 0.876 mg/L and 0.905 mg/L. Concentration of protein in windu shrimp in sampling point 1 in average are 23.4928%, sampling point 2 are 28.1701% and sampling point 3 are 29.1622%. Correlation of concentration of heavy metal Pb and Mn to the concentration of protein in windu shrimp (penaeus sp.) with R = 0.791; r = 0.948.

ETHANOL PRODUCTION FROM TUBER GANYONG (Canna Edulis Kerr.) BY Saccharomyces cerevisiae WITH THE ADDITION OF Spirulina Sp.

JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

This study demonstates the potential of starch tuber ganyong (Canna edulis Kerr.) as a substance for making ethanol by Saccharomyces cerevisiae with microalgae addition of Spirulina sp. as a source of nutrients in the fermentation process of ethanol has been carried out. The study also aims to determine the amount of nutrient concentration and fermentation time was used to generate the optimum ethanol content. Hydrolysis process by enzymatic is done through a liquification phase with α-amylase and saccharification phase with gluko-amylase. Furthermore the process of fermentation stage with the variation of the time (132 hours, 156 hours, 180 hours and 204 hours) using the yeast Saccharomyces cerevisiae with the addition of Spirulina sp. as a nutrient in the variation of Spirulina sp. concentrations (0,6 % (w/v), 1,2 % (w/v) and 1,8 % (w/v)). The result showed the sugar reducing after of hydrolysis was obtained with amount of 0,527 %, increased from the initial state with amount of 0,351 %. The highest ethanol content be found on the increase nutrient with amount of 1,2 % (w/v) by is time of fermentation to180 hours.

JURNAL ATOMIK Vol 2 No 2 (2017)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

A study on the adsorption of Cd2+ ion using silica gel modified with 2-mercaptobenzothiazole (MBT) from rice husk ash has been conducted. The modification of silica gel with MBT was conducted by several steps namely, sample preparation, synthesis of sodium silicate and modification of silica using MBT through a sol gel method. The XRF result showed that silica gel contained 98.98 % SiO2 . The FTIR spectrum of silika MBT showed the persence of Si-OH,   Si-O, Si-O-Si and –SH groups. The surface area of silica gel and silica MBT were 163 m2/g and 30 m2/g, respectively. The adsorption capacity of Cd2+ ion was 0.42 mg/g and the adsorption percentage was 69.40%. The presence of Cr6+ ion decreased the adsorption capacity of silica MBT over Cd2+ ion.

THE INFLUENCE OF Pb (II) ION CONCENTRATION ON PROTEIN CONTENT IN MUSSEL SHELLS (Mactra violacea) IN CONTAMINATED AREA OF TARAKAN ISLAND EAST KALIMANTAN

JURNAL ATOMIK Vol 3 No 2 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

The researched about the correlation level of metal lead (Pb) towards the protein content of mussel shells (Mactra violacea) had been done. This research was taken in the coastal water of Tarakan, North Borneo. The research aimed to know  concentration of ion (Pb) and protein content of mussel shells (Mactra violacea) based on the size and location of the different sampling. Afterwards, the lead (Pb) metal and protein were correlated using Least Square method. Analysis of concentration of Pb ion was performed by using AAS (Atomic Absorption Spectrofotometry) and analysis of protein content using Kjehdal method. From this research, it was found the concentration of Pb ion on point 1 is by an average of 0.7220 mg/L, on point 2 is by an average of 0.7433 mg/L and point 3 is by an average of 0.9208 mg/L. It is also found the content protein of mussel shells (Mactra violacea) on point 1 is by an average of 19,9883%, on point 2 it was found the average of protein content of 21.7714% and point 3 by an average 22.8664%. The correlation concentration of Ion Pb towards protein conten on kerang kepah (Mactra violacea) symbolized as r = 0.8448.

THE MANUFACTURE OF BIODEGRADABLE FILM FROM CEMPEDAK SEED STARCH AND CARBOXY METHYL CELLULOSE WITH THE ADDITION OF GLYCEROL

JURNAL ATOMIK Vol 3 No 2 (2018)
Publisher : Jurusan Kimia FMIPA UNMUL

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Abstract

This research about the manufacture of biodegradable film from cempedak (Artocapus champeden sp.) seed starch and CMC (Carboxy Methyl Cellulose) as well as with the addition of glycerol as a plasticizer has been studied. The purpose of this research are to knowing the concentration of glycerol which have the best of tensile strength, percent elongation, water uptake and biodegradability and knowing the characteristic of biodegradable film produced. In this research the ratio of starch: CMC used is 7:3 while the concentration glycerol is added 10%, 20%, 30% and 40% from the weight of starch. The result of the best concentration of glycerol is glycerol 10%. Glycerol 10% produce a film with 19.62 N/mm2 of tensile strength, 4.98% of percent elongation, 54.33% of water uptake and 39.96% of degradation in 2 days with degradability 24.9 mg/day. Biodegradable film characterized by using FT-IR, analysis result of functional groups showing there are alcohol (O-H) and eter (C-O) groups which indicates that the film is biodegradable.