Enhanced nitrate reduction in hypotrophic waters with integrated photocatalysis and biodegradation  

作　　者：Bingjie Xue Li Tian Yaqi Liu Lingxiu Peng Waheed Iqbal Liangzhong Li Yanping Mao 

机构地区：[1]College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,518071,PR China [2]School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an,710072,PR China [3]Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou,510640,PR China

出　　处：《Environmental Science and Ecotechnology》2024年第5期133-140,共8页环境科学与生态技术（英文）

基　　金：supported by the Natural Science Foundation of Guangdong Province,China(2022A1515011961,2023A1515012019);the Stable Support Program of Colleges and Universities in Shenzhen,China(20200813153536001).

摘　　要：Addressing nitrate contamination in water bodies is a critical environmental challenge,and Intimately Coupling Photocatalysis and Biodegradation(ICPB)presents a promising solution.However,there is still debate about the effectiveness of ICPB in reducing nitrate under hypotrophic conditions.Further research is needed to understand its microbial metabolic mechanism and the functional changes in bacterial structure.Here we explored microbial metabolic mechanisms and changes in bacterial structure in ICPB reactors integrating a meticulously screened TiO_(2)/g-C3N4 photocatalyst with biofilm.We achieved a 26.3%increase in nitrate reduction using 12.2%less organic carbon compared to traditional biodegradation methods.Metagenomic analysis of the microbial communities in ICPB reactors revealed evolving metabolic pathways conducive to nitrate reduction.This research not only elucidates the photocatalytic mechanism behind nitrate reduction in hypotrophic conditions but also provides genomic insights that pave the way for alternative approaches in water remediation technologies.

关 键 词：Nitrate reduction PHOTOCATALYSIS Activated sludge BIODEGRADATION Metabolic pathway 

分 类 号：X52[环境科学与工程—环境工程]