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Zero-valent iron (ZVI) Activation of Persulfate (PS) for Degradation of Para-Chloronitrobenzene in Soil

  • Jia Kang
  • Wencheng Wu
  • Wuxing Liu
  • Jianhua Li
  • Changxun DongEmail author
Article

Abstract

Para-chloronitrobenzene (p-CNB) in soil has posed significant health risks because of its persistence and high toxicity. The efficacy of catalyzed Zero-Valent Iron (ZVI), activated persulfate, and ZVI-persulfate processes for the degradation of p-CNB in soil was investigated. The p-CNB removal rate significantly increased from 10.8 to 90.1% with increased ZVI dosage from 0.1 mmol g−1 to 1.0 mmol g−1. The p-CNB removal increased with the decrease of initial pH and a removal efficiency of 85.3% was obtained at an initial pH value of 6.8 in combined system. The p-CNB removal rate in the single persulfate system and ZVI system was 36.5% and 60.2%, while the ZVI-persulfate system showed more sufficient p-CNB removal capacity and the removal rate of p-CNB was 88.7%. Scanning electron microscopy (SEM) and Electron paramagnetic resonance (EPR) was adopted in order to explore the degradation mechanism by ZVI-Persulfate system in soil.

Keywords

Para-chloronitrobenzene Zero-Valent Iron Persulfate Mechanism Oxidation 

Notes

Acknowledgements

This work was supported by the Science and Technology Support Plan Program of Jiangsu Province (No. BY2016077-03) and the Science and Technology Program of Jiangsu (No. BE2018679).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of SciencesNanjing Agricultural UniversityNanjingChina
  2. 2.South China Institute of Environmental ScienceMinistry of Environmental Protection (MEP)GuangzhouChina
  3. 3.Institute of Soil ScienceChinese Academy of SciencesNanjingChina

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