Ozone and Fenton oxidation affected the bacterial community and opportunistic pathogens in biofilms and effluents from GAC
文献类型：期刊论文
| 作者 | Sun, Wei; Lu, Zhili; Zhang, Zeyu; Zhang, Yao; Shi, Baoyou ; Wang, Haibo
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2022-06-30 |
| 卷号 | 218期号:0页码:118495 |
| ISSN号 | 0043-1354 |
| 关键词 | EXTRACELLULAR POLYMERIC SUBSTANCES CHLORINE DISINFECTION WATER CARBON RESISTANCE |
| 英文摘要 | Granular activated carbon (GAC) filtration impacts pathogen colonization and bacterial communities in drinking water. However, the effects of ozone and heterogeneous Fenton oxidation on microbial community composition, in particular opportunistic pathogens (OPs), and their metabolic potential in biofilms and effluents from GAC filtration are not fully understood. The results of our pilot-scale test indicated that Fenton-GAC filtration removed more dissolved organic carbon (DOC, 1.25 mg/L) than ozone-GAC filtration (0.98 mg/L). Excitation-emission matrix (EEM) results showed that Fenton-GAC removed more tyrosine-like proteins and fulvic acid-like materials, while ozone-GAC removed more humic acid-like compounds and tryptophan-like proteins. Illumina HiSeq analysis indicated that Curvibacter and Hydrogenophaga dominated in the Fenton-GAC biofilm, while Bradyrhizobium, Aquabacterium and Limnobacter were predominant in the ozone-GAC biofilm. Functional prediction suggested that the microbial functional gene related to glyoxylate and dicarboxylate metabolism (the pathway for carbohydrate metabolism) was higher in the Fenton-GAC biofilm, resulting in higher contents of protein in extracellular polymeric substances (EPS) in the Fenton-GAC biofilm. Therefore, there were fewer bacteria that detached from the biofilm into the water during the Fenton-GAC filtration process. The lower EPS content in the effluents from Fenton-GAC resulted in bacteria, including OPs, being easier to remove by chlorine. However, ozone oxidation removed more bacteria, including different OPs, than Fenton oxidation, which contributed to fewer bacteria and OPs in the effluents from ozone-GAC. Overall, our results provide a Fenton-GAC treatment process to remove DOC and control OPs in drinking water systems, the cost of which was comparable to that of ozone-GAC. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47889]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 通讯作者 | Wang, Haibo |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.North China Univ Water Resources & Elect Power, Inst Environm & Municipal Engn, Zhengzhou 450045, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Wei,Lu, Zhili,Zhang, Zeyu,et al. Ozone and Fenton oxidation affected the bacterial community and opportunistic pathogens in biofilms and effluents from GAC[J]. WATER RESEARCH,2022,218(0):118495. |
| APA | Sun, Wei,Lu, Zhili,Zhang, Zeyu,Zhang, Yao,Shi, Baoyou,&Wang, Haibo.(2022).Ozone and Fenton oxidation affected the bacterial community and opportunistic pathogens in biofilms and effluents from GAC.WATER RESEARCH,218(0),118495. |
| MLA | Sun, Wei,et al."Ozone and Fenton oxidation affected the bacterial community and opportunistic pathogens in biofilms and effluents from GAC".WATER RESEARCH 218.0(2022):118495. |
入库方式： OAI收割
来源：生态环境研究中心
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