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.
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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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Kang, J., Wu, W., Liu, W. et al. Zero-valent iron (ZVI) Activation of Persulfate (PS) for Degradation of Para-Chloronitrobenzene in Soil. Bull Environ Contam Toxicol 103, 140–146 (2019). https://doi.org/10.1007/s00128-018-2511-5
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DOI: https://doi.org/10.1007/s00128-018-2511-5