Novel strategy to enhance the biological treatment of coal chemical wastewater by nano-zero valent iron loaded fly ash-based activated carbon assisted activated sludge process

Industrial waste as novel conductive mediator was applied for wastewater treatment as a novel strategy for both waste recycling and sustainable development of wastewater treatment. In this study, nanoscale zero valent iron-loaded fly ash-based activated carbon (nZVI@FABAC) was prepared and applied t...

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Bibliographic Details
Published in:Environmental science and pollution research international 2023-11, Vol.30 (51), p.110550-110561
Main Authors: Ma, Weiwei, Zhang, Xiaoqi, Han, Hongjun, Shi, Xueqing, Kong, Qiaoping, Yu, Tong, Zhao, Fei
Format: Article
Language:English
Subjects:
Activated carbon
Activated sludge
Activated sludge process
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bacteria
Biodegradation
Biological treatment
Chemical industry wastewaters
Chemical wastewater
Earth and Environmental Science
Ecotoxicology
Electron transfer
Environment
Environmental Chemistry
Environmental Health
Fly ash
Industrial wastes
Industrial wastewater
Industrial wastewater treatment
Iron
Phenols
Research Article
Sustainable development
Waste recycling
Waste treatment
Waste Water Technology
Wastewater treatment
Water Management
Water Pollution Control
Water treatment
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Summary:Industrial waste as novel conductive mediator was applied for wastewater treatment as a novel strategy for both waste recycling and sustainable development of wastewater treatment. In this study, nanoscale zero valent iron-loaded fly ash-based activated carbon (nZVI@FABAC) was prepared and applied to enhancing activated sludge (AS) process for coal chemical wastewater (CCW) treatment. The results demonstrated that the removal efficiencies of COD and total phenols (TPh) in nZVI@FABAC/AS process reached about 83.96 and 85.17%, which increased 52.51 and 31.52% compared with the single AS process, respectively. And the acute toxic unit value of CCW was reduced by 88.24% after nZVI@FABAC/AS process treatment. The various functional bacteria including phenol-degrading bacteria ( Comamonas and Acinetobacter ), electroactive bacteria ( Geobacter ), and iron reduction bacteria ( Geothrix ) were enriched in the nZVI@FABAC/AS process, which provided various electron transfer pathways to improve the degradation of toxic organics in CCW. Accordingly, nZVI@FABAC/AS process provided a promising and sustainable way for industrial wastewater treatment.
ISSN:1614-7499
0944-1344
1614-7499
DOI:10.1007/s11356-023-29904-9