期刊
WATER SCIENCE AND TECHNOLOGY
卷 81, 期 4, 页码 781-789出版社
IWA PUBLISHING
DOI: 10.2166/wst.2020.161
关键词
degradation; Fenton; hydroxyl radicals; mechanism; MgFe-layered double hydroxides
资金
- national nature science foundation of China [51608412]
- Young Talent fund of University Association for Science and Technology in Shaanxi, China [20190607]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JQ-428]
- Special Fund Project of Education Department in Shaanxi Province of China [19JK0409]
- Chongqing Key Laboratory of Environmental Materials and Remediation Technology (Chongqing University of Arts and Sciences) [CEK1804]
MgFe-layered double hydroxides (LDHs) were prepared by co-precipitation method with the ratios of [Mg2+]/[Fe3+] varied in the range of 2:1-6:1, and occupied as heterogeneous catalysts for the degradation of Methylene Blue (MB) in the Fenton process. MgFe-LDH prepared with the ratio of [Mg2+]/[Fe3+] at 3:1 was verified to be of high purity. The Fenton-like process catalyzed by MgFe-LDH performed excellently, and more than 97% degradation of MB was obtained with 0.5 mmol/L H2O2 and 0.50 g/L MgFe-LDH at initial pH 2 at room temperature. The occurrence of hydroxyl radicals (center dot OH) was detected and the mechanism was proposed. MgFe-LDH is of excellent catalytic activity and good reusability.
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