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All Journal Molekul: Jurnal Ilmiah Kimia
Mardiyah Kurniasih
Program Studi Kimia, Fakultas Sains dan Teknik Unsoed Purwokerto
Chemical Engineering, Chemistry & Bioengineering Chemistry

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PENENTUAN KEASAMAN ZEOLIT MENGGUNAKAN METODE GRAVIMETRI, TITRASI DAN FTIR Dwi Kartika; Mardiyah Kurniasih
Molekul Vol 2, No 2 (2007)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (70.057 KB) | DOI: 10.20884/1.jm.2007.2.2.38

Abstract

Determination of natural zeolite and activated natural zeolite acidity using gravimetric, titration and FTIR methods had been carried out. The result of gravimetric method show that the acidity of the natural zeolite and activated natural zeolite was 2,350 and 5,628 mol/gram, respectively. The titration method can be obtained that the acidity degree of the natural zeolite and activated natural zeolite was 12,333 and 12,067, respectively. The result showed that the activation of the natural zeolite sample by HCl caused dealumination.
STUDI DEGRADASI ZAT PEWARNA AZO, METIL ORANYE MENGGUNAKAN FERRAT (FeO42-) Dian Windy Dwiasi; Mardiyah Kurniasih
Molekul Vol 3, No 1 (2008)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (189.384 KB) | DOI: 10.20884/1.jm.2008.3.1.42

Abstract

Synthesis of ferrate and its application to azo dyes degradation have been investigated. The synthesis was carried out by reacting Fe(NO3)3 solution with NaOCl in alkaline condition. Oxidation reaction of azo dyes was carried out by adjusting the molar ratio of ferrate to azo dyes. When ferrate reacted with azo dyes, its absorbance was monitored using UV-Vis spectrophotometer at pH condition that had been optimized. Kinetics study for azo dyes degradation was carried out at the absorbance maximum of azo dyes, as a function of time. Ferrate can oxidize azo dyes, methyl oranye effectively in optimum pH of 9.6. With the molar ratio of ferrate/azo dyes 5/1, it showed that the percentages of methyl oranye degradation reached 100%. The azo dyes degradation followed first order of kinetics. Analysis using UV-Vis spectrofotometry suggests that the products of azo dyes degradation are nitrate, ammonia, and benzene. This results showed that ferrate is an alternative and green oxidizing agent which can be used for azo dyes degradation.
Co-Authors Dian Windy Dwiasi Dwi Kartika