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Jurnal Kimia (Journal of Chemistry)

jchem
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Published by Universitas Udayana

ISSN : 19079850 EISSN : 25992740 DOI : 10.24843/JCHEM

Core Subject : Science,

Chemistry

Jurnal Kimia (Journal of Chemistry) publishes papers on all aspects of fundamental and applied chemistry. The journal is naturally broad in scope, welcomes submissions from across a range of disciplines, and reports both theoretical and experimental studies.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 13 Documents

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Search results for , issue "Vol. 7, No. 1 Januari 2013" : 13 Documents clear

STUDI FOTODEGRADASI CONGO RED MENGGUNAKAN UV/ZnO/REAGEN FENTON Ni Luh Putu Widiantini; James Sibarani; Manuntun Manurung
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The study of photodegradation of Congo Red using UV light, with addition ZnO catalyst, H2O2 and Fe2+ has been carried out. This study included the determination of optimum amount of ZnO, H2O2, Fe2+, pH optimum and the determination of system which shows the most effective in Congo Red photodegradation. The results showed that the optimum conditions to degradate 100 ppm of Congo Red solution were 60 mg of ZnO, 4 ml of H2O2 (0,0392 mol), 20 mg FeSO4 (0,0013 mol) and pH 5. The highest percentage of degradation was 93,6093 + 0,12 % reached using UV/ZnO/H2O2/ Fe2+ system at 5 hour photodegradation time. In this processes addition of ZnO, H2O2, and FeSO4, and pH were important parameters to increase the percentage of photodegradation.

VARIASI KONSENTRASI DAN pH TERHADAP KEMAMPUAN KITOSAN DALAM MENGADSORPSI METILEN BIRU Turmuzi Tammi; Ni Made Suaniti; Manuntun Manurung
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The effects of chitosan concentration and pH on adsorption properties of the chitosan extracted from shrimp shell waste to adsorb methylen blue had been studied. Chitosan was made by two steps namely the isolation of chitin and the chitin deacetylation. The chitin isolation itself was conducted by three sequence procedures which were deproteination, demineralization, and depigmentation. The deacetylation was conducted by heating the chitin obtained in the concentrated solution of NaOH 50% (w/v) at 90oC for 120 minutes. The degree of the deacetylation was 54,65%. The maximum concentration of 0,2% (w/v) at pH 7 showed the highest adsorption (%D) of 50 mL 10 ppm methylene blue of 95,044%.

SINTESIS KOMPOSIT SELULOSA-POLIPROPILENA DENGAN REAGEN FENTON SEBAGAI AGEN PENGKOPLING I Nengah Simpen; I Made Sutha Negara
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The research was conducted to observe of mixture ratio of cellulose from eceng gondok, concentrations of H2O2/Fe2+ (Fenton reagent), and concentrations of polypropylene from plastic garbage wich produced optimum condition to composite production with strong mechanics and biodegradable properties. This research was conducted by determination of optimum condition in composite forming of cellulose-PP. Steps performed within forming of cellulose-PP were (1) purification of plastic garbage to get polypropylene (PP); (2) cellulose extraction of from enceng gondok by alkaline extraction; continued with (3) composite forming of cellulose-PP through reaction of free radical with Fenton reagent as insiator. Determination of optimum conditions for the formation of cellulose-PP composite was conducted by varying some variables influencing the properties of mechanicals and biodegradability of cellulose-PP composite that is concentration ratio between cellulose and PP and concentration of H2O2. Composite of cellulosa-PP to be tested by mechanicals properties (elasticity modulus (MOE), breaking modulus (MOR), and density and also its ability of water absorption test and biodegradability test on dry land and wet land. The result gave optimum ratio of 1:3 and optimum concentration of H2O2 of 0.5%. Analysis of Laser Induced Breakdown Spectroscopy (LIBS) showed that the hardness of EG-PP was higner than with plastic PP and that insertion of cellulose molecule in composite was successful. Its optimum conditionthe EG-PP composite can adsorp 18.73% water and biodegradable properties.

PENGARUH KONSENTRASI AMMONIUM SULFAT ((NH4)2SO4) OPTIMASI JAMUR JERAMI PADI ILS (ISOLAT LOKAL SINGARAJA) UNTUK BIODEGRADASI ZAT WARNA AZO JENIS REMAZOL RED I Nyoman Sukarta; Putu Sumahandriyani
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

This study aims to determine the concentration, contact time, and the optimum pH required by the ILS rice straw mushrooms to degrade azo dyes remazol red type. Subject in this study is ILS rice straware mushroom which is obtained from existing fields in Temukus Village, Banjar District, Buleleng Regency. The objecs are the concentration, contact time, and the optimum pH required by the ILS rice straw mushroom to degrade textile dyes remazol red type. Stage of data collection starts from the preliminary test biodegradability of dyes, mold growing on PDA medium (potato dextrosa agar) and liquid Czapex, qualitative test of lignolitic enzyme, and dye biodegradation test on the variation of environmental conditions. The concentrations of remazol red dye before and after degraded by the ILS rice straw mushroom was measured by using a Hach spectrophotometer. The results showed that the degradation of azo dyes type remazol red RB using the ILS rice straw mushroom was optimum at color concentration of 30 ppm, contact time of 10 days, and pH 5 with the efficiency of each of 57,77; 71,13; and 50,88%.

ISOLASI DNA METAGENOMIK DARI TANAH HUTAN MANGROVE PANTAI SUWUNG BALI I Nengah Wirajana; Darma Asih Yuliana; Ketut Ratnayani
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Metagenomic DNA isolation from mangrove forest soils of Suwung Beach-Bali was conducted to exploit the biocatalytic potential of microbial communities for the discovery of novel cellulase. The whole DNA isolation was conducted by modification of preparation step by Marco (2010) and DNA extraction step by Amorim et al (2008). The results of metagenomic DNA isolation were analyzed by spectrophotometry and agarose gel electrophoresis. The results showed that whole DNA was able be isolated successfully, but protein and humic acid were found as contaminant.

MODIFIKASI SILIKA GEL DARI ABU SEKAM PADI DENGAN LIGAN DIFENILKARBAZON I Wayan Sudiarta; Ni Putu Diantariani; Putu Suarya
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Modification of silica gel from rice husk ash by diphenylcarbazone ligand have been conducted. This study included synthesis of silica gel from rice husk ash, determination of the optimum ratio of ligand/silica gel, optimum time of silica gel modification The results showed that the modification of silica gel from rice husk ash with diphenylcarbazone has been successfully synthesized, indicated by appearearance of characteristic absorbances of Si-O-Si, Si-OH, -NH, Ar-H, C=O functional groups on the infra red spectra at 1096, 910-830, 3330, 3242, cm-1, and 1660 cm-1, respectively. The optimum of ligand/silica is 0,5 mmol : 0,5 g or 1mmol ligand 1g silica gel, with the modification time of 4 hours.

STUDI LAJU KOROSI DAN MEKANISME INHIBISI ALUMINIUM MURNI MENGGUNAKAN NATRIUM SITRAT Tiurlina Siregar
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The process of corrosion in metals is a spontaneous one that goes along with the flow of the electrons in the metal that serves as the anode to that which act as a cathode. Thus, metal corrosion is an electrochemical process. A common form of corrosion on aluminum is pitting corrosion. Pitting corrosion can occur on metal surfaces in direct contact with moist air, usually with a metal that has a thin layer of oxide. Because of the a corrosions, a variety of processes in the metallurgical industry should get special treatment to improve the corrosion resistance of the environment, ie with the addition of a corrosion inhibitor. A corrosion inhibitor is an additive in the fluid that can slow the rate of corrosion. Sodium citrate is an anodic inhibitor which is an ampifilik organic salt with both polar and non-polar groups. Sodium benzoate and sodium tartrate salt are ampifilic known as food additive, show that salts can act as corrosion inhibitor on aluminum. These findings drive the author to try Sodium Citrate as a corrosion inhibitor on aluminum which is environmentally friendly given that the benzoate salt at high levels the can’t damage environment.

ANTITUBERCULOSIS ACTIVITY OF METHANOLIC EXTRACT OF KEDONDONG HUTAN (SPONDIAS PINNATA (L.f.) Kurz.) LEAVES Ida Bagus Nyoman Putra Dwija; I Ketut Juniarta; Sagung Chandra Yowani; Ni Putu Ariantari
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Tuberculosis remains global health problem nowadays. The presence of resistant strain of Mycobacterium tuberculosis against first and second line antiberculosis drugs, support any effort for discovering alternative and complementary therapy. Kedondong Hutan (Spondias pinnata (L.f) Kurz.) belongs to Anacardiaceae family, traditionally used to treat chronic cough, which is one of common symptoms of tuberculosis. The objective of this study was to investigate antituberculosis activity of methanolic extract of Kedondong hutan leaves against multidrug resistant strain of M. tuberculosis. Kedondong hutan leaves were extracted with methanol continued with phytochemical analysis. Antituberculosis activity assay of this extract was performed by proportion method using L-J medium. Extract was tested within 3 different concentration of 10, 50 and 250 mg/mL, with and without any additional rifampicin of 40 µg/mL. The observation of colonies was done every day started from 3rd week until 4th week and then analyzed qualitatively. The result of phytochemical analysis showed the presence of triterpenoids and flavonoids. Antituberculosis activity of kedondong hutan leaves extract at a concentration of 30 mg/mL was 52-73% and that ofcombination of 10 mg/mL extract + 40 µg/mL rifampicin was 85-89.5%. Extract concentration of 50 and 250 mg/mL, alone and combined with rifampicin showed growth inhibiton of 100%. In conclusion, methanol extract of kedondong hutan leaves has a potential antituberculosis activity.

EFEKTIFITAS PENGOLAHAN AIR EFFLUENT MENJADI AIR REKLAMASI DI INSTALASI PENGOLAHAN AIR LIMBAH SUWUNG DENPASAR DITINJAU DARI KANDUNGAN KEKERUHAN, TOTAL ZAT TERLARUT (TDS), DAN TOTAL ZAT TERSUSPENSI (TSS) Luh Putu Widya Kalfika Devi; K. G. Dharma Putra; A. A. Bawa Putra
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

The application of water reclamation system has been researched for the concentrations of Total Suspended Solid (TSS), Total Dissolved Solid (TDS), and turbidity in the effluent of waste water treatment in Suwung Denpasar. The aims of the research are to determine the effect of each stage of water reclamation, to determine the effectiveness water reclamation system and to know the quality reclaimed water. The results showed that each stage of water reclamation system can decrease the concentrations of TSS, TDS, and turbidity from effluent. The percentage of reduction of TSS, TDS, and turbidity in biological filtration system were 85.60 %, 63.75 %, and 62.78 % respectively. The pre-ozonation system were 63.82 %, 64.93 %, and 73.78 % respectively and the coagulation and membrane systems were 60.58 %, 92.48 %, dan 74.58 % respectively. The overall rate of effectivenes of waste water reclamation system was 97.94% for TSS, 99.04% for TDS and 97.52% for turbidity.

SINTESIS SILIKA GEL DARI ABU SEKAM PADI DAN ABU LIMBAH PEMBAKARAN BATU-BATA DENGAN METODE PRESIPITASI Isnawan Hadi; Made Arsa; I Wayan Sudiarta
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Studies on synthesis of silica gel from rice hull and waste ofcombustion ash with prepitatian method have been. The studies was with the determination of the optimum temperature incineration of rice husk, the determination of the optimum concentration of NaOH in the manufacture of Sodium Silicate solution from rice hush and brick ash. Synthetic silica gel was obtained by boiling the ash with NaOH solution to create sodium silicate. This solution was neutralized with sulfuric acid and silica gel was produced. After washing and drying the silica gel was analyzed by spectrophotometer IR and X-ray Diffractometer. The result showed that the optimum incineration temperature of rice husk was 700oC, the optimum concentration of NaOH was 3M. Based on the characterization by IR, silica gel has been successfully created, marked by the absorption indicating and silianol of functional groups –OH at 3456,44-3487,30 cm-1and Si-O-Si or siloxane at 1103,28-1087,85 cm-1and X-RD analysis showed that silica gel formed was amorphous form.

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Ni Putu Diantariani

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jurnalkimia@unud.ac.id

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+628123640424

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jurnalkimia@unud.ac.id

Editorial Address
Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

Location
Kota denpasar,

Bali

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Ni Putu Diantariani

Contact Email jurnalkimia@unud.ac.id

Phone +628123640424

Journal Mail Official jurnalkimia@unud.ac.id

Editorial Address Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

Location Kota denpasar, Bali INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Ni Putu Diantariani

Contact Email
jurnalkimia@unud.ac.id

Phone
+628123640424

Journal Mail Official
jurnalkimia@unud.ac.id

Editorial Address
Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

Location
Kota denpasar,

Bali

INDONESIA