Fenton试剂和活化过硫酸钠氧化降解土壤中的二氯酚和三氯酚

刘楚琛, 阎秀兰, 刘琼枝, 邵金秋, 廖晓勇. Fenton试剂和活化过硫酸钠氧化降解土壤中的二氯酚和三氯酚[J]. 环境工程学报, 2018, 12(6): 1749-1758. doi: 10.12030/j.cjee.201712066
引用本文: 刘楚琛, 阎秀兰, 刘琼枝, 邵金秋, 廖晓勇. Fenton试剂和活化过硫酸钠氧化降解土壤中的二氯酚和三氯酚[J]. 环境工程学报, 2018, 12(6): 1749-1758. doi: 10.12030/j.cjee.201712066
LIU Chuchen, YAN Xiulan, LIU Qiongzhi, SHAO Jinqiu, LIAO Xiaoyong. Oxidative degradation of dichlorophenol and trichlorophenol in soils by Fenton reagent and activated persulfate[J]. Chinese Journal of Environmental Engineering, 2018, 12(6): 1749-1758. doi: 10.12030/j.cjee.201712066
Citation: LIU Chuchen, YAN Xiulan, LIU Qiongzhi, SHAO Jinqiu, LIAO Xiaoyong. Oxidative degradation of dichlorophenol and trichlorophenol in soils by Fenton reagent and activated persulfate[J]. Chinese Journal of Environmental Engineering, 2018, 12(6): 1749-1758. doi: 10.12030/j.cjee.201712066

Fenton试剂和活化过硫酸钠氧化降解土壤中的二氯酚和三氯酚

  • 基金项目:

    北京市科技计划项目(D16110900470000)

Oxidative degradation of dichlorophenol and trichlorophenol in soils by Fenton reagent and activated persulfate

  • Fund Project:
  • 摘要: 氯酚类物质(chlorophenols, CPs)在环境介质中广泛存在且具有很强环境毒性。为探究化学氧化修复场地氯酚类污染的可行性,通过室内实验、模拟搅拌实验、现场中试,开展应用Fenton试剂和活化过硫酸钠氧化降解土壤CPs的研究。结果表明,化学氧化可有效降解土壤中的CPs,在氧化剂用量和CPs总量摩尔比为15:1时,CaO活化Na2S2O8能高效降解土壤中的二氯酚(2,4-DCP)和三氯酚(2,4,6-TCP),室内实验和现场中试的去除率均达90%以上,处理后的2,4-DCP和2,4,6-TCP浓度均低于《展览会用地土壤环境质量评价标准》(HJ 350-2007)A类标准限值。Fenton试剂在室内实验中降解率达90%以上,但现场中试对2,4-DCP和2,4,6-TCP的降解率仅为66.1%、23.8%,处理后2,4-DCP浓度仍超过A类标准限值1倍以上。此外,在修复过程中,约70%的2,4-DCP、2,4,6-TCP会向液相转移,因此,需要关注修复系统引入水后污染物向液相中的转移可能造成的二次污染。研究结果可为氯酚类污染土壤的修复提供新思路,并为实际工程应用提供理论依据。
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  • 刊出日期:  2018-06-18

Fenton试剂和活化过硫酸钠氧化降解土壤中的二氯酚和三氯酚

  • 1. 中国科学院地理科学与资源研究所,北京 100101
  • 2. 中国科学院陆地表层格局与模拟重点实验室,北京 100101
  • 3. 中国科学院大学,北京 100049
基金项目:

北京市科技计划项目(D16110900470000)

摘要: 氯酚类物质(chlorophenols, CPs)在环境介质中广泛存在且具有很强环境毒性。为探究化学氧化修复场地氯酚类污染的可行性,通过室内实验、模拟搅拌实验、现场中试,开展应用Fenton试剂和活化过硫酸钠氧化降解土壤CPs的研究。结果表明,化学氧化可有效降解土壤中的CPs,在氧化剂用量和CPs总量摩尔比为15:1时,CaO活化Na2S2O8能高效降解土壤中的二氯酚(2,4-DCP)和三氯酚(2,4,6-TCP),室内实验和现场中试的去除率均达90%以上,处理后的2,4-DCP和2,4,6-TCP浓度均低于《展览会用地土壤环境质量评价标准》(HJ 350-2007)A类标准限值。Fenton试剂在室内实验中降解率达90%以上,但现场中试对2,4-DCP和2,4,6-TCP的降解率仅为66.1%、23.8%,处理后2,4-DCP浓度仍超过A类标准限值1倍以上。此外,在修复过程中,约70%的2,4-DCP、2,4,6-TCP会向液相转移,因此,需要关注修复系统引入水后污染物向液相中的转移可能造成的二次污染。研究结果可为氯酚类污染土壤的修复提供新思路,并为实际工程应用提供理论依据。

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