Surfactant-assisted removal of 2,4-dichlorophenol from soil by zero-valent Fe/Cu activated persulfate

doi:10.1016/j.cjche.2021.03.031

Chinese Journal of Chemical Engineering ›› 2022, Vol. 44 ›› Issue (4): 447-455.DOI: 10.1016/j.cjche.2021.03.031

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Surfactant-assisted removal of 2,4-dichlorophenol from soil by zero-valent Fe/Cu activated persulfate

Ling Xu^1,2, Ji Li¹, Wenbin Zeng^1,2, Kai Liu^2,3, Yibing Ma⁴, Liping Fang^2,3, Chenlu Shi^2,3

1 Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China;
2 Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China;
3 National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China;
4 Macau Environmental Research Institute, Macau University of Science and Technology, Taipa, Macau, China

Received:2020-10-17 Revised:2021-03-11 Online:2022-06-18 Published:2022-04-28
Contact: Liping Fang,E-mail:jegerfang@gmail.com;Chenlu Shi,E-mail:clshi@soil.gd.cn
Supported by:
This work was financially supported by the National Natural Science Foundation of China (21876161; 41420104007), and the National Key Research and Development Project of China (No. 2018YFF0213403), Guangdong Academy of Sciences' Project (2019GDASYL-0102006; 2019GDASYL-0301002; 2018GDASCX-0501).

Surfactant-assisted removal of 2,4-dichlorophenol from soil by zero-valent Fe/Cu activated persulfate

Ling Xu^1,2, Ji Li¹, Wenbin Zeng^1,2, Kai Liu^2,3, Yibing Ma⁴, Liping Fang^2,3, Chenlu Shi^2,3

1 Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, China;
2 Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China;
3 National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China;
4 Macau Environmental Research Institute, Macau University of Science and Technology, Taipa, Macau, China

通讯作者: Liping Fang,E-mail:jegerfang@gmail.com;Chenlu Shi,E-mail:clshi@soil.gd.cn
基金资助:
This work was financially supported by the National Natural Science Foundation of China (21876161; 41420104007), and the National Key Research and Development Project of China (No. 2018YFF0213403), Guangdong Academy of Sciences' Project (2019GDASYL-0102006; 2019GDASYL-0301002; 2018GDASCX-0501).

Abstract

Abstract: The organic compounds contaminated soil substantially threatens the growth of plants and food safety. In this study, we synthesis zero-valent bimetallic Fe/Cu catalysts for the degradation of 2,4-dichlorophenol (DCP) in soils with persulfate (PS) in combination of organic surfactants and exploring the main environmental impact factors. The kinetic experiments show that the 5% (mass) dosage of Fe/Cu exhibits a higher degradation efficiency (86%) of DCP in soils, and the degradation efficiency of DCP increases with the increase of the initial PS concentration. Acidic conditions are favorable for the DCP degradation in soils. More importantly, the addition of Tween-80, and Triton-100 can obviously desorb DCP from the soil surface, which enhances the degradation efficiency of DCP in soils by Fe/Cu and PS reaction system. Furthermore, the Quenching experiments demonstrate that SO₄^-· and ·OH are the predominant radicals for the degradation of DCP during the Fe/Cu and PS reaction system as well as non-radical also exist. The findings of this work provide an effective method for remediating DCP from soils.

Key words: Zero-valent iron and copper, Advanced oxidation process, Persulfate, Chlorinated organic pollutants, Surfactant

摘要： The organic compounds contaminated soil substantially threatens the growth of plants and food safety. In this study, we synthesis zero-valent bimetallic Fe/Cu catalysts for the degradation of 2,4-dichlorophenol (DCP) in soils with persulfate (PS) in combination of organic surfactants and exploring the main environmental impact factors. The kinetic experiments show that the 5% (mass) dosage of Fe/Cu exhibits a higher degradation efficiency (86%) of DCP in soils, and the degradation efficiency of DCP increases with the increase of the initial PS concentration. Acidic conditions are favorable for the DCP degradation in soils. More importantly, the addition of Tween-80, and Triton-100 can obviously desorb DCP from the soil surface, which enhances the degradation efficiency of DCP in soils by Fe/Cu and PS reaction system. Furthermore, the Quenching experiments demonstrate that SO₄^-· and ·OH are the predominant radicals for the degradation of DCP during the Fe/Cu and PS reaction system as well as non-radical also exist. The findings of this work provide an effective method for remediating DCP from soils.

关键词: Zero-valent iron and copper, Advanced oxidation process, Persulfate, Chlorinated organic pollutants, Surfactant

Ling Xu, Ji Li, Wenbin Zeng, Kai Liu, Yibing Ma, Liping Fang, Chenlu Shi. Surfactant-assisted removal of 2,4-dichlorophenol from soil by zero-valent Fe/Cu activated persulfate[J]. Chinese Journal of Chemical Engineering, 2022, 44(4): 447-455.

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Surfactant-assisted removal of 2,4-dichlorophenol from soil by zero-valent Fe/Cu activated persulfate

Surfactant-assisted removal of 2,4-dichlorophenol from soil by zero-valent Fe/Cu activated persulfate

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