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.
Keyword: ferrate, azo dyes,
methyl oranye, azo dyes degradation
Penulis: Dian Windy Dwiasi,
Mardiyah Kurniasih
Kode Jurnal: jpkimiadd080023
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