Biochar-supported nanoscale zero-valent iron as an efficient catalyst for organic degradation in groundwater

[Display omitted] •The porous biochar carrier can facilitate the TCE removal by alleviating aggregation of iron nanoparticles and enhancing PMS activation.•The biochar catalysts manifested a superior catalytic performance of PMS activation for TCE degradation.•The catalytic performance of Fe-CB600 o...

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Veröffentlicht in:Journal of hazardous materials 2020-02, Vol.383, p.121240-121240, Article 121240
Hauptverfasser: Li, Zhe, Sun, Yuqing, Yang, Yang, Han, Yitong, Wang, Tongshuai, Chen, Jiawei, Tsang, Daniel C.W.
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container_issue
container_start_page 121240
container_title Journal of hazardous materials
container_volume 383
creator Li, Zhe
Sun, Yuqing
Yang, Yang
Han, Yitong
Wang, Tongshuai
Chen, Jiawei
Tsang, Daniel C.W.
description [Display omitted] •The porous biochar carrier can facilitate the TCE removal by alleviating aggregation of iron nanoparticles and enhancing PMS activation.•The biochar catalysts manifested a superior catalytic performance of PMS activation for TCE degradation.•The catalytic performance of Fe-CB600 out-performed other fabricated catalysts.•The superoxide radical and singlet oxygen were validated as predominant ROSs and oxygen containing group played the key role in PMS activation. High-efficiency and cost-effective catalysts are critical to completely mineralization of organic contaminants for in-situ groundwater remediation via advanced oxidation processes (AOPs). The engineered biochar is a promising method for waste biomass utilization and sustainable remediation. This study engineers maize stalk (S)- and maize cob (C)-derived biochars (i.e., SB300, SB600, CB300, and CB600, respectively) with oxygen-containing functional groups as a carbon-based support for nanoscale zero-valent iron (nZVI). Morphological and physiochemical characterization showed that nZVI could be impregnated within the framework of the synthesized Fe-CB600 composite, which exhibited the largest surface area, pore volume, iron loading capacity, and Fe0 proportion. Superior degradation efficiency (100% removal in 20 min) of trichloroethylene (TCE, 0.1 mM) and fast pseudo-first-order kinetics (kobs =22.0 h−1) were achieved via peroxymonosulfate (PMS, 5 mM) activation by the Fe-CB600 (1 g L−1) under groundwater condition (bicarbonate buffer solution at pH = 8.2). Superoxide radical and singlet oxygen mediated by Fe0 and oxygen-containing group (i.e., CO) were demonstrated as the major reactive oxygen species (ROSs) responsible for TCE dechlorination. The effectiveness and mechanism of the Fe/C composites for rectifying organic-contaminated groundwater were depicted in this study.
doi_str_mv 10.1016/j.jhazmat.2019.121240
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High-efficiency and cost-effective catalysts are critical to completely mineralization of organic contaminants for in-situ groundwater remediation via advanced oxidation processes (AOPs). The engineered biochar is a promising method for waste biomass utilization and sustainable remediation. This study engineers maize stalk (S)- and maize cob (C)-derived biochars (i.e., SB300, SB600, CB300, and CB600, respectively) with oxygen-containing functional groups as a carbon-based support for nanoscale zero-valent iron (nZVI). Morphological and physiochemical characterization showed that nZVI could be impregnated within the framework of the synthesized Fe-CB600 composite, which exhibited the largest surface area, pore volume, iron loading capacity, and Fe0 proportion. Superior degradation efficiency (100% removal in 20 min) of trichloroethylene (TCE, 0.1 mM) and fast pseudo-first-order kinetics (kobs =22.0 h−1) were achieved via peroxymonosulfate (PMS, 5 mM) activation by the Fe-CB600 (1 g L−1) under groundwater condition (bicarbonate buffer solution at pH = 8.2). Superoxide radical and singlet oxygen mediated by Fe0 and oxygen-containing group (i.e., CO) were demonstrated as the major reactive oxygen species (ROSs) responsible for TCE dechlorination. 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High-efficiency and cost-effective catalysts are critical to completely mineralization of organic contaminants for in-situ groundwater remediation via advanced oxidation processes (AOPs). The engineered biochar is a promising method for waste biomass utilization and sustainable remediation. This study engineers maize stalk (S)- and maize cob (C)-derived biochars (i.e., SB300, SB600, CB300, and CB600, respectively) with oxygen-containing functional groups as a carbon-based support for nanoscale zero-valent iron (nZVI). Morphological and physiochemical characterization showed that nZVI could be impregnated within the framework of the synthesized Fe-CB600 composite, which exhibited the largest surface area, pore volume, iron loading capacity, and Fe0 proportion. Superior degradation efficiency (100% removal in 20 min) of trichloroethylene (TCE, 0.1 mM) and fast pseudo-first-order kinetics (kobs =22.0 h−1) were achieved via peroxymonosulfate (PMS, 5 mM) activation by the Fe-CB600 (1 g L−1) under groundwater condition (bicarbonate buffer solution at pH = 8.2). Superoxide radical and singlet oxygen mediated by Fe0 and oxygen-containing group (i.e., CO) were demonstrated as the major reactive oxygen species (ROSs) responsible for TCE dechlorination. The effectiveness and mechanism of the Fe/C composites for rectifying organic-contaminated groundwater were depicted in this study.</description><subject>Biomass waste valorization</subject><subject>Charcoal</subject><subject>Engineered biochar</subject><subject>Groundwater</subject><subject>Iron</subject><subject>nZVI-carbon composites</subject><subject>Reactive oxygen species</subject><subject>Sustainable waste management</subject><subject>Sustainable/green remediation</subject><subject>Water Pollutants, Chemical - analysis</subject><issn>0304-3894</issn><issn>1873-3336</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkEtv2zAQhIkiRe0k_QkNeOxFLl-ipFPRGnkBAXppzsSaXDk0ZNIhKRfxr68Mu73mtIvFzA7mI-QLZwvOuP62WWxe4LCFshCMdwsuuFDsA5nztpGVlFJfkDmTTFWy7dSMXOa8YYzxplafyEzyWstGN3My_PTRvkCq8rjbxVTQ0QAhZgsD0gOmWO2nLRTqUwwUMoVAse-99cejhQLDWy60j4nGtIbgLXW4TuCg-MngA12nOAb3Bwqma_KxhyHj5_O8Is93t7-XD9XTr_vH5Y-nyiomSgUaGt0qqZxFgQgNMBRaO-Gw76RAzbupGDTtqm2xbZsaelH34Jy2tl5JK6_I19PfXYqvI-Zitj5bHAYIGMdshOg6pbqJzCStT1KbYs4Je7NLfgvpzXBmjqDNxpxBmyNocwI9-W7OEeNqi-6_6x_ZSfD9JMCp6N5jMvnIzKLzCW0xLvp3Iv4C3-2UTQ</recordid><startdate>20200205</startdate><enddate>20200205</enddate><creator>Li, Zhe</creator><creator>Sun, Yuqing</creator><creator>Yang, Yang</creator><creator>Han, Yitong</creator><creator>Wang, Tongshuai</creator><creator>Chen, Jiawei</creator><creator>Tsang, Daniel C.W.</creator><general>Elsevier B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-6850-733X</orcidid><orcidid>https://orcid.org/0000-0003-2576-1589</orcidid></search><sort><creationdate>20200205</creationdate><title>Biochar-supported nanoscale zero-valent iron as an efficient catalyst for organic degradation in groundwater</title><author>Li, Zhe ; Sun, Yuqing ; Yang, Yang ; Han, Yitong ; Wang, Tongshuai ; Chen, Jiawei ; Tsang, Daniel C.W.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c402t-a6a768434dce2eea7a0e266d2def932e619304a78b88e8875af25fadd6cc5b3c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Biomass waste valorization</topic><topic>Charcoal</topic><topic>Engineered biochar</topic><topic>Groundwater</topic><topic>Iron</topic><topic>nZVI-carbon composites</topic><topic>Reactive oxygen species</topic><topic>Sustainable waste management</topic><topic>Sustainable/green remediation</topic><topic>Water Pollutants, Chemical - analysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Zhe</creatorcontrib><creatorcontrib>Sun, Yuqing</creatorcontrib><creatorcontrib>Yang, Yang</creatorcontrib><creatorcontrib>Han, Yitong</creatorcontrib><creatorcontrib>Wang, Tongshuai</creatorcontrib><creatorcontrib>Chen, Jiawei</creatorcontrib><creatorcontrib>Tsang, Daniel C.W.</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of hazardous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Zhe</au><au>Sun, Yuqing</au><au>Yang, Yang</au><au>Han, Yitong</au><au>Wang, Tongshuai</au><au>Chen, Jiawei</au><au>Tsang, Daniel C.W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Biochar-supported nanoscale zero-valent iron as an efficient catalyst for organic degradation in groundwater</atitle><jtitle>Journal of hazardous materials</jtitle><addtitle>J Hazard Mater</addtitle><date>2020-02-05</date><risdate>2020</risdate><volume>383</volume><spage>121240</spage><epage>121240</epage><pages>121240-121240</pages><artnum>121240</artnum><issn>0304-3894</issn><eissn>1873-3336</eissn><abstract>[Display omitted] •The porous biochar carrier can facilitate the TCE removal by alleviating aggregation of iron nanoparticles and enhancing PMS activation.•The biochar catalysts manifested a superior catalytic performance of PMS activation for TCE degradation.•The catalytic performance of Fe-CB600 out-performed other fabricated catalysts.•The superoxide radical and singlet oxygen were validated as predominant ROSs and oxygen containing group played the key role in PMS activation. 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subjects Biomass waste valorization
Charcoal
Engineered biochar
Groundwater
Iron
nZVI-carbon composites
Reactive oxygen species
Sustainable waste management
Sustainable/green remediation
Water Pollutants, Chemical - analysis
title Biochar-supported nanoscale zero-valent iron as an efficient catalyst for organic degradation in groundwater
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