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We investigated the reductive dechlorination of granular\u2010activated carbon (GAC)\u2010adsorbed trichloroethylene (TCE) by nanoscale zero\u2010valent iron (nZVI) to understand the effect of sequestration on abiotic reactivity of organic contaminants. Significant reduction of TCE sequestered in GAC micropores was observed, even though direct contact with nZVI was unlikely. Reduction of sequestered TCE by reactive Fe(II) species or molecular hydrogen was ruled out as the reaction mechanisms. We propose that GAC served as the conductor for the transfer of electrons or atomic hydrogen from nZVI to the micropores, wherein adsorbed TCE molecules were reduced. An important implication for environmental remediation is that carbonaceous adsorbents not only function as a superb sink for organic contaminants but also allow them to be slowly degraded while being trapped.<\/jats:p>","DOI":"10.2134\/jeq2011.0185","type":"journal-article","created":{"date-parts":[[2011,12,5]],"date-time":"2011-12-05T14:45:10Z","timestamp":1323096310000},"page":"1878-1885","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":57,"title":["Reductive Dechlorination of Activated Carbon\u2010Adsorbed Trichloroethylene by Zero\u2010Valent Iron: Carbon as Electron Shuttle"],"prefix":"10.1002","volume":"40","author":[{"given":"Hao","family":"Tang","sequence":"first","affiliation":[{"name":"College of Environmental Science and Engineering Ministry of Education Key Lab. of Pollution Processes and Environmental Criteria Nankai Univ. Tianjin Key Lab. of Environmental Remediation and Pollution Control Tianjin 300071 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dongqiang","family":"Zhu","sequence":"additional","affiliation":[{"name":"State Key Lab. of Pollution Control and Resource Reuse School of the Environment, Nanjing Univ. Jiangsu 210093 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tielong","family":"Li","sequence":"additional","affiliation":[{"name":"College of Environmental Science and Engineering Ministry of Education Key Lab. of Pollution Processes and Environmental Criteria Nankai Univ. Tianjin Key Lab. of Environmental Remediation and Pollution Control Tianjin 300071 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haonan","family":"Kong","sequence":"additional","affiliation":[{"name":"College of Environmental Science and Engineering Ministry of Education Key Lab. of Pollution Processes and Environmental Criteria Nankai Univ. 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