In situ remediation of ortho-nitrochlorobenzene in soil by dual oxidants (hydrogen peroxide/persulfate)

被引:27
作者
Liu, Zhonghua [1 ]
Guo, Weilin [1 ]
Han, Xuemei [1 ]
Li, Xianghui [1 ]
Zhang, Ke [2 ]
Qiao, Zhuangming [2 ]
机构
[1] Univ Jinan, Sch Resources & Environm, Jinan 250022, Peoples R China
[2] Shandong Meiquan Environm Protect Sci & Technol C, Jinan 250101, Peoples R China
关键词
Nitrochlorobenzene; Persulfate; Hydrogen peroxide; Modified Fenton; Soil remediation; PERSULFATE ACTIVATION; CONTAMINATED SOIL; ORGANIC-MATTER; OXIDATION; DEGRADATION; PEROXIDE; KINETICS; MINERALS; WATER; IRON;
D O I
10.1007/s11356-016-7188-x
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The efficacies of catalyzed H2O2, activated persulfate, and catalyzed H2O2-persulfate processes for the degradation of ortho-nitrochlorobenzene (o-NCB) in soil were investigated. The application of catalyzed H2O2-persulfate process was promising, and after a careful adjustment of oxidants and activator doses, it demonstrated a considerable improvement in o-NCB degradation compared with activated persulfate process and catalyzed H2O2 process. The degradation of o-NCB in catalyzed H2O2-persulfate process was obviously influenced by the concentration of persulfate and H2O2, the molar ratio between persulfate and H2O2, the concentration of o-NCB, and initial pH. Degradation of o-NCB was obviously inhibited by the addition of tert-butyl alcohol, methanol, and phenol, suggesting that nitrobenzene was dominantly oxidized by HO center dot and SO4 (-)center dot generated in the catalyzed H2O2-persulfate process. The results from these studies demonstrated that the natural iron species present in soil could effectively facilitate the degradation of organic pollutants in the presence of H2O2 and persulfate.
引用
收藏
页码:19707 / 19712
页数:6
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