Experimental and theoretical aspects of biochar-supported nanoscale zero-valent iron activating H2O2 for ciprofloxacin removal from aqueous solution

Qiming Mao; Yaoyu Zhou; Yuan Yang; Jiachao Zhang; Lifen Liang; Hailong Wang; Shuang Luo; Lin Luo; Paramsothy Jeyakumar; Yong Sik Ok; Muhammad Rizwan

doi:10.1016/j.jhazmat.2019.120848

Experimental and theoretical aspects of biochar-supported nanoscale zero-valent iron activating H₂O₂ for ciprofloxacin removal from aqueous solution

Qiming Mao, Yaoyu Zhou, Yuan Yang, Jiachao Zhang, Lifen Liang, Hailong Wang, Shuang Luo, Lin Luo, Paramsothy Jeyakumar, Yong Sik Ok, Muhammad Rizwan

Research output: Contribution to journal › Article › peer-review

142 Citations (Scopus)

Abstract

Ciprofloxacin has been frequently detected in water environment, and its removal has become a significant public concern. Biochar-supported nanoscale zero-valent iron (BC/nZVI) to activate hydrogen peroxide (H₂O₂) has many advantages on promoting the removal of organic contaminants. In this paper, the BC/nZVI activating H₂O₂ degradation of ciprofloxacin was systematically investigated by experimental and theoretical approaches. The morphologies and property analysis showed that nZVI particles distributed uniformly on the biochar surface, which mainly include ⁻OH, >C[dbnd]O and C[sbnd]O[sbnd]C and C[sbnd]O groups. Different reaction conditions were compared to define the optimal conditions for ciprofloxacin removal in BC/nZVI/H₂O₂ system. More than 70% of ciprofloxacin was removed in the optimal conditions: acidic condition (pH 3∼4), low doses of H₂O₂ (20 mM), and temperature of 298 K. The hydroxyl radical (^•OH) oxidation was the primary pathway in BC/nZVI/H₂O₂ degradation of ciprofloxacin process. The theoretical calculation indicated that hydrogen atom abstraction (HAA) pathways were the dominant oxidation pathways contributing 92.3% in overall second‒order rate constants (k) of ^•OH and ciprofloxacin. The current results are valuable to evaluate the application of BC/nZVI activating H₂O₂ degradation of ciprofloxacin and other fluoroquinolone antibiotics in water treatment plants.

Original language	English
Article number	120848
Journal	Journal of hazardous materials
Volume	380
DOIs	https://doi.org/10.1016/j.jhazmat.2019.120848
Publication status	Published - 2019 Dec 15

Bibliographical note

Funding Information:
Funding from National Key research and development Projects of China (2016YFC0403002), and the National Nature Science Foundation of China (21806035, 21806003), Nature Science Foundation of Hunan province (2019JJ50226) and Hunan Provincial Key Research and Development (2018WK4007) is gratefully acknowledged.

Funding Information:
Funding from National Key research and development Projects of China ( 2016YFC0403002 ), and the National Nature Science Foundation of China ( 21806035, 21806003 ), Nature Science Foundation of Hunan province ( 2019JJ50226 ) and Hunan Provincial Key Research and Development ( 2018WK4007 ) is gratefully acknowledged.

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

Advanced oxidation processes
Biochar-supported
Density functional theory
Nanoscale zero-valent iron

ASJC Scopus subject areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

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10.1016/j.jhazmat.2019.120848

Cite this

Mao, Q., Zhou, Y., Yang, Y., Zhang, J., Liang, L., Wang, H., Luo, S., Luo, L., Jeyakumar, P., Ok, Y. S., & Rizwan, M. (2019). Experimental and theoretical aspects of biochar-supported nanoscale zero-valent iron activating H₂O₂ for ciprofloxacin removal from aqueous solution. Journal of hazardous materials, 380, Article 120848. https://doi.org/10.1016/j.jhazmat.2019.120848

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abstract = "Ciprofloxacin has been frequently detected in water environment, and its removal has become a significant public concern. Biochar-supported nanoscale zero-valent iron (BC/nZVI) to activate hydrogen peroxide (H2O2) has many advantages on promoting the removal of organic contaminants. In this paper, the BC/nZVI activating H2O2 degradation of ciprofloxacin was systematically investigated by experimental and theoretical approaches. The morphologies and property analysis showed that nZVI particles distributed uniformly on the biochar surface, which mainly include −OH, >C[dbnd]O and C[sbnd]O[sbnd]C and C[sbnd]O groups. Different reaction conditions were compared to define the optimal conditions for ciprofloxacin removal in BC/nZVI/H2O2 system. More than 70% of ciprofloxacin was removed in the optimal conditions: acidic condition (pH 3∼4), low doses of H2O2 (20 mM), and temperature of 298 K. The hydroxyl radical (•OH) oxidation was the primary pathway in BC/nZVI/H2O2 degradation of ciprofloxacin process. The theoretical calculation indicated that hydrogen atom abstraction (HAA) pathways were the dominant oxidation pathways contributing 92.3% in overall second‒order rate constants (k) of •OH and ciprofloxacin. The current results are valuable to evaluate the application of BC/nZVI activating H2O2 degradation of ciprofloxacin and other fluoroquinolone antibiotics in water treatment plants.",

keywords = "Advanced oxidation processes, Biochar-supported, Density functional theory, Nanoscale zero-valent iron",

author = "Qiming Mao and Yaoyu Zhou and Yuan Yang and Jiachao Zhang and Lifen Liang and Hailong Wang and Shuang Luo and Lin Luo and Paramsothy Jeyakumar and Ok, {Yong Sik} and Muhammad Rizwan",

note = "Funding Information: Funding from National Key research and development Projects of China (2016YFC0403002), and the National Nature Science Foundation of China (21806035, 21806003), Nature Science Foundation of Hunan province (2019JJ50226) and Hunan Provincial Key Research and Development (2018WK4007) is gratefully acknowledged. Funding Information: Funding from National Key research and development Projects of China ( 2016YFC0403002 ), and the National Nature Science Foundation of China ( 21806035, 21806003 ), Nature Science Foundation of Hunan province ( 2019JJ50226 ) and Hunan Provincial Key Research and Development ( 2018WK4007 ) is gratefully acknowledged. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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T1 - Experimental and theoretical aspects of biochar-supported nanoscale zero-valent iron activating H2O2 for ciprofloxacin removal from aqueous solution

AU - Mao, Qiming

AU - Zhou, Yaoyu

AU - Yang, Yuan

AU - Zhang, Jiachao

AU - Liang, Lifen

AU - Wang, Hailong

AU - Luo, Shuang

AU - Luo, Lin

AU - Jeyakumar, Paramsothy

AU - Ok, Yong Sik

AU - Rizwan, Muhammad

N1 - Funding Information: Funding from National Key research and development Projects of China (2016YFC0403002), and the National Nature Science Foundation of China (21806035, 21806003), Nature Science Foundation of Hunan province (2019JJ50226) and Hunan Provincial Key Research and Development (2018WK4007) is gratefully acknowledged. Funding Information: Funding from National Key research and development Projects of China ( 2016YFC0403002 ), and the National Nature Science Foundation of China ( 21806035, 21806003 ), Nature Science Foundation of Hunan province ( 2019JJ50226 ) and Hunan Provincial Key Research and Development ( 2018WK4007 ) is gratefully acknowledged. Publisher Copyright: © 2019 Elsevier B.V.

PY - 2019/12/15

Y1 - 2019/12/15

N2 - Ciprofloxacin has been frequently detected in water environment, and its removal has become a significant public concern. Biochar-supported nanoscale zero-valent iron (BC/nZVI) to activate hydrogen peroxide (H2O2) has many advantages on promoting the removal of organic contaminants. In this paper, the BC/nZVI activating H2O2 degradation of ciprofloxacin was systematically investigated by experimental and theoretical approaches. The morphologies and property analysis showed that nZVI particles distributed uniformly on the biochar surface, which mainly include −OH, >C[dbnd]O and C[sbnd]O[sbnd]C and C[sbnd]O groups. Different reaction conditions were compared to define the optimal conditions for ciprofloxacin removal in BC/nZVI/H2O2 system. More than 70% of ciprofloxacin was removed in the optimal conditions: acidic condition (pH 3∼4), low doses of H2O2 (20 mM), and temperature of 298 K. The hydroxyl radical (•OH) oxidation was the primary pathway in BC/nZVI/H2O2 degradation of ciprofloxacin process. The theoretical calculation indicated that hydrogen atom abstraction (HAA) pathways were the dominant oxidation pathways contributing 92.3% in overall second‒order rate constants (k) of •OH and ciprofloxacin. The current results are valuable to evaluate the application of BC/nZVI activating H2O2 degradation of ciprofloxacin and other fluoroquinolone antibiotics in water treatment plants.

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