Volume 10 Issue 2
Mar.  2020
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Article Navigation >  Journal of Environmental Engineering Technology  > 2020  >  10(2): 288-292
YAN Xianghua, LIU Xinghai, WANG Xingrun, ZHAO Caiyun, TONG Xuejiao. Condition optimization of pesticide contaminated soils remediation by modified Fenton reagent[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 288-292. doi: 10.12153/j.issn.1674-991X.20190094
Citation: YAN Xianghua, LIU Xinghai, WANG Xingrun, ZHAO Caiyun, TONG Xuejiao. Condition optimization of pesticide contaminated soils remediation by modified Fenton reagent[J]. Journal of Environmental Engineering Technology, 2020, 10(2): 288-292. doi: 10.12153/j.issn.1674-991X.20190094
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Condition optimization of pesticide contaminated soils remediation by modified Fenton reagent

doi: 10.12153/j.issn.1674-991X.20190094

  • 1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences

  • 2. Yuhuan Environmental Technology Co., Ltd.

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  • Corresponding author: Xingrun WANG E-mail: wangxr@craes.org.cn
  • Received Date: 2019-05-31
  • Publish Date: 2020-03-20
    Abstract
  • Fenton reagent modified by EDTA-2Na was applied to study the chemical oxidation remediation of chlorinated organics and BTEX in pesticide contaminated soils. The effects of EDTA-2Na, H2O2, FeSO4 dosage and H2O2 dosing times on pollutants degradation rate were studied. The results showed that the degradation rate of benzene was increased by 29.6 percentage points and that of 1,2-dichlorobenzene by 26.4 percentage points when EDTA-2Na was added in the ratio of 1∶1 to Fe 2+. Under the same experimental conditions, the degradation rates of benzene, 1, 2-dichlorobenzene increased with the addition of EDTA-2Na, H2O2, FeSO4, H2O2 concentrations, as well as with H2O2 dosing times, and then gradually stabilized. The suitable process parameters were identified as follows: H2O2 dosage 3.0 mmol∕g, n(H2O2)∶n(FeSO4)∶n(EDTA-2Na)=10∶1∶1, and reaction time 2 hours, and H2O2 added within 4 times. Under these conditions, the degradation rate of benzene was high up to 86.0%, and that of 1,2-dichlorobenzene was up to 83.6%.

     

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