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Irma Mon
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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Optimasi Proses Degradasi Metil Violet pada Reaktor Fotokatalitik Film TiO2-PEG Ika Sri Sulfiana; Hardeli Hamzah; Irma Mon
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (268.883 KB) | DOI: 10.24036/p.v1i1.553

Abstract

Methyl violet is one of triphenylmethane dyes which has been used extensively in various industrial application. Significant proportion of these dye enters the environment as wastewater. Photocatalytic degradation by using TiO2 under UV light irradiation has been shown to be potentially advantageous in the treatment of wastewater. This research was aimed to determine the optimum thin layers of catalyst and irradiation period of photocatalytic reactor. Modification by adding PEG was done to enhance TiO2 activity. A decrease in methyl violet concentration was analysed by using UV-Vis Spectrophotometer. GC-MS was used to ensure that there were a degradation indeed. Experimental results showed the optimum thin layers was reached in 8 times and  irradiation period was 5 hours. At this optimum condition, degradation percentage obtained was 79,03% with the initial concentration used was 10 mg/L and the flow rate was 110 mL/s. Identification by using GC-MS showed many peaks which proved there were degradation processes.
Studi Inhibisi Korosi Baja oleh Ekstrak Biji Kakao (Theobroma cacao) dalam Medium Asam Klorida Nurfitriana .; Irma Mon; Yerimadesi Busmairizal
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.884 KB) | DOI: 10.24036/p.v1i1.563

Abstract

Cocoa (Theobroma cacao) is one of the many plants contain catechin. Catechin can form a complex with iron, a complex is formed on the surface of steel and the complex adsorbed may block the entry of oxygen, ions Cl- ion and other corrosive, so the rate of corrosion can be slowed down. This research aims to determine the efficiency of inhibition corrosion of steel by cocoa extract in hydrochloric acid medium. The method used is based on the gravimetric, namely based on the reduction of weight (weight loss) of steel before and after with corrosion. Surface analysis the steel is done using stereo microscopes. Of research results obtained that the cacao seed extract may decrease the rate of corrosion of steel in hydrochloric acid medium 0.01 M with corrosion inhibition efficiency 76,21% and results analysis by FTIR spectrophotometer to layer on steel surface indicate a complex formed between Fe-catechin.
Co-Authors Hardeli Hamzah Ika Sri Sulfiana Nurfitriana . Yerimadesi Busmairizal