DISCOLORATION AND DEGRADATION OF THE RED GRLX-220 AZO-DYE BY OZONATION.

被引:8
|
作者
dos Santos, Patricia Kelly [1 ]
Fernandes, Karla Carvalho [1 ]
de Faria, Luiz Antonio [1 ]
de Freitas, Admildo Costa [2 ]
da Silva, Leonardo Morais [3 ]
机构
[1] Univ Fed Uberlandia, Inst Quim, BR-38400100 Uberlandia, MG, Brazil
[2] Inst Fed Educ Ciencia & Tecnol Triangulo Mineiro, BR-38064790 Uberaba, MG, Brazil
[3] Univ Fed Vales Jequitinhonha & Mucuri, Dept Quim, BR-39100000 Diamantina, MG, Brazil
来源
QUIMICA NOVA | 2011年 / 34卷 / 08期
关键词
discoloration and degradation; ozone; semi-batch conditions; WASTE-WATER TREATMENT; ENHANCED OZONATION; FENTONS OXIDATION; REACTIVE DYES; OZONE; DECOLORIZATION; REMOVAL; GENERATION; TOXICITY; KINETICS;
D O I
10.1590/S0100-40422011000800004
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
DISCOLORATION AND DEGRADATION OF THE RED GRLX-220 AZO-DYE BY OZONATION. The discoloration and degradation of the textile dye RED GRLX-220 using the electrochemically generated ozone was investigated. Total discoloration was rapidly achieved in both acid and basic conditions. A pseudo-first order kinetics was observed for discoloration, influenced by pH and ozonation time. A considerable degree of mineralization (60%) was obtained after 30 min of ozonation in alkaline medium. The feasibility of organic matter oxidation during the ozonation process increased in both acidic and alkaline media. The toxicity decreased after the ozonation process, suggesting that the byproducts are less toxic than the parental compound.
引用
收藏
页码:1315 / 1322
页数:8
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