Descoloração e degradação do azo corante Vermelho GRLX-220 por ozonização

Química Nova

Admildo Costa de Freitas¹  Karla Carvalho Fernandes²  Luiz Antonio de Faria²  Patrícia Kelly dos Santos²  Leonardo Morais da Silva³ 

[1] Instituto Federal de Educação, Ciência e Tecnologia Triângulo Mineiro;Universidade Federal de Uberlândia;Universidade Federal dos Vales do Jequitinhonha e Mucuri;

关键词: discoloration and degradation;    ozone;    semi-batch conditions;   

DOI  :  10.1590/S0100-40422011000800004

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown