标题：Decolorization and Detoxification of Acid Orange 7 by Zero-Valent Iron with UV Light
作者： Li, HY (Li, Huiyuan); Qiu, JJ (Qiu, Juanjuan); Wang, X (Wang, Xue); Zhang, H (Zhang, Hui)
来源出版物：JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN 卷：39 期：5 页码: 812-819 出版年： OCT 2017
摘要：The decolorization and detoxification of Acid Orange 7 (AO7), a commonly used azo dye, by zero-valent iron (Fe-0) and UV light was investigated. The influence of important reaction parameters, such as initial pH and the Fe-0 dosage, on the color removal and effluent toxicity, was elucidated. Results indicated that the decolorization of AO7 was enhanced in the UV/Fe-0 system, as compared to that with only UV or Fe-0, in which the decolorization efficiency in 60 min increased with increasing Fe-0 dosage and decreasing solution pH. The kinetics of the A07 removal conformed to the Langmuir-Hinshelwood model with high correlation coefficient (R-2 = 0.9962). Under the optimum conditions, AO7 was decolorized rapidly within 60 min (over 97% decolorization efficiency), with 34.8% of TOC reduction. Fe-0 could be used for repeated cycles to decolorize AO7 effectively. Furthermore, nearly no Daphnia magna immobilization was found after the treatment, suggesting that the method was effective to reduce the AO7 toxicity.
作者关键词：Acute toxicity; Azo dye; Fe-0 reuse; Langmuir-Hinshelwood model; Zero-valent iron
扩展关键词： AQUEOUS-SOLUTION; ZEROVALENT IRON; AZO-DYE; ULTRASONIC IRRADIATION; REDUCTIVE TRANSFORMATION; RAPID DECOLORIZATION; WASTE-WATER; DEGRADATION; REMOVAL; FENTON
通讯作者地址：Zhang, H (reprint author), Wuhan Univ, Dept Environm Engn, Wuhan 430079, Hubei, Peoples R China.
地址：[Li, Huiyuan; Qiu, Juanjuan; Wang, Xue; Zhang, Hui] Wuhan Univ, Dept Environm Engn, Wuhan 430079, Hubei, Peoples R China.
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