Removal of CI Reactive Red 2 by low pressure UV/chlorine advanced oxidation

被引：22
作者：
Wu, Qianyuan [1 ]
Li, Yue
Wang, Wenlong
Wang, Ting
Hu, Hongying
机构：
[1] Tsinghua Univ, Sch Environm, Environm Simulat & Pollut Control State Key Joint, Beijing 100084, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL SCIENCES | 2016年 / 41卷
关键词：
Textile wastewater; Azo dye; Ultraviolet irradiation; Chlorine; Advanced oxidation process; AZO-DYE; AQUEOUS-SOLUTION; ELECTRICAL ENERGY; WASTE-WATER; DECOLORIZATION; DEGRADATION; CHLORINE; UV; PHOTOLYSIS; KINETICS;
D O I：
10.1016/j.jes.2015.06.013
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Azo dyes are commonly found as pollutants in wastewater from the textile industry, and can cause environmental problems because of their color and toxicity. The removal of a typical azo dye named C.I. Reactive Red 2 (RR2) during low pressure ultraviolet (UV)/chlorine oxidation was investigated in this study. UV irradiation at 254 nm and addition of free chlorine provided much higher removal rates of RR2 and color than UV irradiation or chlorination alone. Increasing the free chlorine dose enhanced the removal efficiency of RR2 and color by UV/chlorine oxidation. Experiments performed with nitrobenzene (NB) or benzoic acid (BA) as scavengers showed that radicals (especially UOH) formed during UV/chlorine oxidation are important in the RR2 removal. Addition of HCO3- and Cl- to the RR2 solution did not inhibit the removal of RR2 during UV/chlorine oxidation. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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页码：227 / 234
页数：8
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