Efficient microwave-assisted mineralization of oxytetracycline driven by persulfate and hypochlorite over Cu-biochar catalyst

Qiaozhi Zhang; Yuqing Sun; Weijian Xu; Yang Cao; Chunfei Wu; Chi Hwa Wang; Daniel C.W. Tsang

doi:10.1016/j.biortech.2023.128698

Efficient microwave-assisted mineralization of oxytetracycline driven by persulfate and hypochlorite over Cu-biochar catalyst

Qiaozhi Zhang, Yuqing Sun, Weijian Xu, Yang Cao, Chunfei Wu, Chi Hwa Wang, Daniel C.W. Tsang

Research output: Journal article publication › Journal article › Academic research › peer-review

34 Citations (Scopus)

Abstract

Microwave (MW)-assisted catalytic degradation of organic pollutants draws increasing attention owing to its high efficiency in wastewater treatment. This work developed Cu-loaded biochar (CuBC) catalysts for time-efficient mineralization of refractory and high-concentration oxytetracycline (OTC). With only 1 min at 80 °C, Na₂S₂O₈ achieved 100% total organic carbon (TOC) removal over the Cu5BC, while NaClO mineralized 73.3% TOC over the metal-free BC, in contrast to a relatively low mineralization efficiency (< 35%) achieved by H₂O₂. The high efficiency in MW-assisted oxidation systems could be ascribed to reactive oxidizing species (^•SO₄⁻ or ^•ClO), which otherwise were barely detectable in a conventional heating system. The interactions between CuBC and MW were revealed by correlating the physiochemical characteristics to the MW absorption ability. The proposed catalytic systems can contribute to the development of a high-throughput and low-carbon wastewater treatment technology.

Original language	English
Article number	128698
Journal	Bioresource Technology
Volume	372
DOIs	https://doi.org/10.1016/j.biortech.2023.128698
Publication status	Published - Mar 2023

Keywords

Advanced oxidation
Engineered biochar
Industrial wastewater treatment
Microwave activation
Pharmaceuticals and personal care products

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

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10.1016/j.biortech.2023.128698

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title = "Efficient microwave-assisted mineralization of oxytetracycline driven by persulfate and hypochlorite over Cu-biochar catalyst",

abstract = "Microwave (MW)-assisted catalytic degradation of organic pollutants draws increasing attention owing to its high efficiency in wastewater treatment. This work developed Cu-loaded biochar (CuBC) catalysts for time-efficient mineralization of refractory and high-concentration oxytetracycline (OTC). With only 1 min at 80 °C, Na2S2O8 achieved 100% total organic carbon (TOC) removal over the Cu5BC, while NaClO mineralized 73.3% TOC over the metal-free BC, in contrast to a relatively low mineralization efficiency (< 35%) achieved by H2O2. The high efficiency in MW-assisted oxidation systems could be ascribed to reactive oxidizing species (•SO4− or •ClO), which otherwise were barely detectable in a conventional heating system. The interactions between CuBC and MW were revealed by correlating the physiochemical characteristics to the MW absorption ability. The proposed catalytic systems can contribute to the development of a high-throughput and low-carbon wastewater treatment technology.",

keywords = "Advanced oxidation, Engineered biochar, Industrial wastewater treatment, Microwave activation, Pharmaceuticals and personal care products",

author = "Qiaozhi Zhang and Yuqing Sun and Weijian Xu and Yang Cao and Chunfei Wu and Wang, {Chi Hwa} and Tsang, {Daniel C.W.}",

note = "Funding Information: This study was financially supported by the Hong Kong Research Grants Council (PolyU 15222020). Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

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doi = "10.1016/j.biortech.2023.128698",

language = "English",

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T1 - Efficient microwave-assisted mineralization of oxytetracycline driven by persulfate and hypochlorite over Cu-biochar catalyst

AU - Zhang, Qiaozhi

AU - Sun, Yuqing

AU - Xu, Weijian

AU - Cao, Yang

AU - Wu, Chunfei

AU - Wang, Chi Hwa

AU - Tsang, Daniel C.W.

PY - 2023/3

Y1 - 2023/3

N2 - Microwave (MW)-assisted catalytic degradation of organic pollutants draws increasing attention owing to its high efficiency in wastewater treatment. This work developed Cu-loaded biochar (CuBC) catalysts for time-efficient mineralization of refractory and high-concentration oxytetracycline (OTC). With only 1 min at 80 °C, Na2S2O8 achieved 100% total organic carbon (TOC) removal over the Cu5BC, while NaClO mineralized 73.3% TOC over the metal-free BC, in contrast to a relatively low mineralization efficiency (< 35%) achieved by H2O2. The high efficiency in MW-assisted oxidation systems could be ascribed to reactive oxidizing species (•SO4− or •ClO), which otherwise were barely detectable in a conventional heating system. The interactions between CuBC and MW were revealed by correlating the physiochemical characteristics to the MW absorption ability. The proposed catalytic systems can contribute to the development of a high-throughput and low-carbon wastewater treatment technology.

AB - Microwave (MW)-assisted catalytic degradation of organic pollutants draws increasing attention owing to its high efficiency in wastewater treatment. This work developed Cu-loaded biochar (CuBC) catalysts for time-efficient mineralization of refractory and high-concentration oxytetracycline (OTC). With only 1 min at 80 °C, Na2S2O8 achieved 100% total organic carbon (TOC) removal over the Cu5BC, while NaClO mineralized 73.3% TOC over the metal-free BC, in contrast to a relatively low mineralization efficiency (< 35%) achieved by H2O2. The high efficiency in MW-assisted oxidation systems could be ascribed to reactive oxidizing species (•SO4− or •ClO), which otherwise were barely detectable in a conventional heating system. The interactions between CuBC and MW were revealed by correlating the physiochemical characteristics to the MW absorption ability. The proposed catalytic systems can contribute to the development of a high-throughput and low-carbon wastewater treatment technology.

KW - Advanced oxidation

KW - Engineered biochar

KW - Industrial wastewater treatment

KW - Microwave activation

KW - Pharmaceuticals and personal care products

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JO - Bioresource Technology

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Efficient microwave-assisted mineralization of oxytetracycline driven by persulfate and hypochlorite over Cu-biochar catalyst

Abstract

Keywords

ASJC Scopus subject areas

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