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Fe3O4 nanoparticles loading on cow dung based activated carbon as an efficient catalyst for catalytic microbubble ozonation of biologically pretreated coal gasification wastewater.

Authors
  • Hou, Sen1
  • Jia, Shengyong2
  • Jia, Jinjin1
  • He, Zhengguang1
  • Li, Guirong1
  • Zuo, Qiting3
  • Zhuang, Haifeng4
  • 1 School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China. , (China)
  • 2 School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China; Yellow River Institute of Hydraulic Research, Zhengzhou, 450003, China; Henan Key Laboratory of Groundwater Pollution Prevention and Rehabilitation, Zhengzhou, 450001, China. Electronic address: [email protected] , (China)
  • 3 School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China; Henan Key Laboratory of Groundwater Pollution Prevention and Rehabilitation, Zhengzhou, 450001, China. , (China)
  • 4 Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou, 310023, China. , (China)
Type
Published Article
Journal
Journal of Environmental Management
Publisher
Elsevier
Publication Date
Apr 29, 2020
Volume
267
Pages
110615–110615
Identifiers
DOI: 10.1016/j.jenvman.2020.110615
PMID: 32364131
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Cow dung based activated carbon was successfully modified by Fe3O4 nanoparticles as the novel catalyst (Fe3O4 [email protected]) to improve the microbubble ozonation treating biologically pretreated coal gasification wastewater (BPCGW). When the pH, ozone dosage, ozone bubble diameter and catalyst dosage of the ozonation were 7, 0.4 L/min, 5 μm and 3 g/L, the chemical oxygen demand (COD) removal efficiency reached 74% and the ratio of biochemical oxygen demand in five days/COD (BOD5/COD) increased from 0.04 to 0.52, which were attributed to the electron transfer of Fe2+ and Fe3+ in Fe3O4 and enhanced hydroxyl radicals generation by the reaction of iron ions and ozone. Meanwhile, benzene derivatives, naphthalene and aromatic proteins were significantly removed while multiple chain hydrocarbons and their derivatives composed the main residual organic matters. The catalytic activity was slightly decreased even the catalyst has been reused for five times. Therefore, catalytic microbubble ozonation using Fe3O4 [email protected] represented excellent performance treating BPCGW and it is a promising process for wastewater advanced treatment. Copyright © 2020 Elsevier Ltd. All rights reserved.

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