期刊
CHEMOSPHERE
卷 225, 期 -, 页码 157-165出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.02.180
关键词
Cu layered double hydrotalcite; Hydrogen peroxide; Catalytic degradation; Ethylbenzene
资金
- National Natural Science Foundation of China [41471404]
- Natural Science Foundation of Jiangsu Province [BK20171519]
- Frontier Fields during the Thirteenth Five-Year Plan Period of the Institute of Soil Science, Chinese Academy of Sciences [ISSASIP 1659]
- International Cooperation and Exchanges NSFC [41761134091]
- National Key R&D Program of China [2018YFC1803002]
- Foundation of National Engineering Laboratory for Site Remediation Technologies [NEL-SRT201710]
A high catalytic system using Cu layered double hydrotalcite (Cu(II)-Mg(II)-Fe(III)LDHs) and hydrogen peroxide (H2O2) was developed for the degradation of ethylbenzene. It was identified that the degradation efficiency of ethylbenzene (0.08 mmol L-1) and TOC removal were 96.1% and 39.7% respectively in the presence of 0.1 g L-1 Cu(II)-Mg(II)-Fe(III)LDHs with (Cu2+ + Mg2+)/Fe3+ molar ratio of 5.0 and 0.16 mmol L-1 H2O2 in 6.0 h. Based on ESR and XPS data, hydroxyl radicals (center dot OH) were the predominant free radical specials generated from the catalytic decomposition of H2O2 for the degradation of ethylbenzene. The redox of Cu(II)/Cu(III) on the layered Cu(II)-Mg(II)-Fe(III)LDHs surface active sites accounted for the formation of center dot OH radicals and the cycle of Cu(II) in the Cu(II)-Mg(II)-Fe(III)LDHs/H2O2 system were proposed. (C) 2019 Elsevier Ltd. All rights reserved.
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