Textile wastewater decolorization by zero valent iron activated peroxymonosulfate: Compared with zero valent copper

被引：131
作者：
Ghanbari, Farshid [1 ]
Moradi, Mahsa [2 ]
Manshouri, Mohammad [2 ]
机构：
[1] Ahvaz Jundishapur Univ Med Sci, Sch Publ Hlth, Dept Environm Hlth Engn, Ahvaz, Iran
[2] Shahid Beheshti Univ Med Sci SBMU, Sch Publ Hlth, Dept Environm Hlth Engn, Tehran, Iran
来源：
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2014年 / 2卷 / 03期
关键词：
Average oxidation state; Peroxymonosulfate; Textile wastewater; Zero valent copper; Zero valent iron;
D O I：
10.1016/j.jece.2014.08.003
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Textile wastewater must be decolorized before discharging into the environment. In this study, peroxymonosulfate (PMS) was activated by zero valent iron (ZVI) to produce sulfate radical for degradation of organic compounds. The optimum condition for activation of PMS was provided in pH of 4 and 3000 mg/L ZVI. ZVI compared to zero valent copper (ZVC) was more effective in terms of COD and color removals. PMS and H2O2 performances were compared and the results showed that PMS had more efficiency in similar conditions. Simultaneous use of PMS and H2O2 synergically increased decolorization rate. The TOC and COD removal efficiencies of various processes were in the following order: ZVI-PMS-H2O2 >= ZVI-PMS > ZVI-H2O2 > ZVC-PMS > ZVC-H2O2. The average oxidation state (AOS) was considerably increased after oxidation processes using PMS and H2O2. This result indirectly proves biodegradability improvement of real textile wastewater. Finally, the oxidative processes were economically compared based on cost of chemicals. (C) 2014 Elsevier Ltd. All rights reserved.
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收藏
页码：1846 / 1851
页数：6
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