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中南大学学报(自然科学版)

Journal of Central South University

第49卷    第10期    总第290期    2018年10月

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文章编号:1672-7207(2018)10-2391-07
基于亚硫酸盐的六价铬-苯酚污染废水协同处理研究
闫松,张成武,呼博识,郭超,秦传玉

(吉林大学 新能源与环境学院,吉林 长春,130012)

摘 要: 探讨基于亚硫酸盐的六价铬-苯酚复合污染废水协同处理的可行性。探究重金属-六价铬、有机物-苯酚协同处理的效果、影响因素及机理。研究结果表明:该体系可以快速且同时实现六价铬还原和苯酚降解;降解效率随体系初始pH降低而逐渐增大,本实验条件范围内最佳pH为3.0;Fe2+,Fe3+和Mn2+均在不同程度上抑制六价铬还原和苯酚降解,Al3+对该体系处理效果没有显著影响;仅当有氧气存在时体系能生成羟基自由基和硫酸根自由基进而氧化降解苯酚,其中起主要作用的是硫酸根自由基。该体系可以为复合污染废水的处理提供有效的依据,实现协同、绿色的水处理。

 

关键字: 六价铬;苯酚;亚硫酸盐;自由基;协同处理

Study on sulfite-based synergistic treatment of wastewater containing hexavalent chromium and phenol
YAN Song, ZHANG Chengwu, HU Boshi, GUO Chao, QIN Chuanyu

College of New Energy and Environment, Jilin University, Changchun 130012, China

Abstract:The feasibility of sulfite-based synergistic treatment of hexavalent chromium and phenol polluted wastewater was investigated. The synergetic transformation efficiency, influencing factors and correlated mechanisms were analysed. The results show that this system can achieve the simultaneous and rapid effect of hexavalent chromium reduction and phenol oxidation. The transformation efficiency of both pollutants gradually increases with the decrease of pH, and the optimum pH is 3.0 in this series of experiments. Fe2+, Fe3+, Mn2+ all inhibit hexavalent chromium reduction and phenol degradation to some extent, but Al3+ has little influence on the treatment. In this synergistic reaction system, oxygen is necessary in generating the free radicals, such as hydroxyl radical and sulfate radical. Sulfate radical plays a major role in degrading phenol. This study can provide a basis for remediation of composite wastewater contamination, as a realization of synergistic and green wastewater treatment.

 

Key words: hexavalent chromium; phenol; sulfite; free radicals; synergistic treatment

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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