生物滤料去除饮用水中消毒副产物和抗性基因对比  

Removal of Disinfection Byproducts and Antibiotic Resistance Genes in Drinking Water by Biological Filter Media

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作  者:高靖雨 蔡武 梁昊 史国贵 陈友怡 吕来 邢学辞 胡春 GAO Jing‑yu;CAI Wu;LIANG Hao;SHI Guo‑gui;CHEN You‑yi;LÜLai;XING Xue‑ci;HU Chun(Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Institute of Environmental Research at Greater Bay,Guangzhou University,Guangzhou 510006,China)

机构地区:[1]广州大学大湾区环境研究院、珠江三角洲水质安全与保护教育部重点实验室,广东广州510006

出  处:《中国给水排水》2024年第19期31-38,共8页China Water & Wastewater

基  金:国家自然科学基金资助项目(52150056、51838005);广东省“珠江人才计划”引进创新创业团队项目(2019ZT08L387);广东省自然科学基金资助面上项目(2023A1515011509);广州市科技计划市校联合资助项目(202201020177)。

摘  要:为强化对水中复合微污染物的去除,制备了改性椰壳活性炭(CAC)和催化剂滤料(HCLL-S8-M),考察了其对含氮消毒副产物生成势(N-DBPsFP)和抗性基因(ARGs)的去除效果和机制。结果表明,在相同复合微污染物条件下(甲基对硫磷和2,4-二氯苯氧乙酸均为1μg/L),改性CAC和HCLL-S8-M出水中卤代乙腈和卤代硝基甲烷的总生成势分别为385.15、464.18 ng/L,较进水分别降低了212.74、133.71 ng/L;进水、改性CAC和HCLL-S8-M出水中的ARGs相对丰度分别为4.35%、1.91%和2.88%。改性CAC和HCLL-S8-M可以高效去除溶解性有机物(DOC)和复合微污染物。生物滤料上微生物分泌的胞外聚合物更少,并可富集能够降解有机物的菌群。改性CAC和HCLL-S8-M可通过减少DBPs前体物的产生和ARGs的增殖,控制微污染物胁迫效应造成的间接饮用水水质风险。To enhance the removal of composite micro‑pollutants in water,modified coconut shell activated carbon(CAC)and catalyst filler(HCLL‑S8‑M)were prepared,and their removal effects and mechanisms on nitrogenous disinfection byproducts formation potential(N‑DBPsFP)and antibiotic resistance genes(ARGs)were investigated.The results showed that the total formation potential of haloacetonitriles and halonitromethanes in the modified CAC and HCLL‑S8‑M effluent were 385.15 ng/L and 464.18 ng/L,which were 212.74 ng/L and 133.71 ng/L lower than that in influent.The relative abundance of ARGs in the influent,modified CAC and HCLL‑S8‑M effluent were 4.35%,1.91%and 2.88%under the same complex micro‑pollutants conditions(1μg/L for parathion‑methyl and 2,4‑dichlorophenoxyacetic acid).Modified CAC and HCLL‑S8‑M could remove DOC including complex micro‑pollutants.Microorganisms secreted less EPS,and those capable of degrading organic matter became dominant in effluent.Modified CAC and HCLL‑S8‑M reduced the production of DBPs precursors and proliferation of ARGs and helped to control indirect drinking water quality risks due to the stressful effects of micro‑pollutants.

关 键 词:饮用水深度处理 生物滤料 消毒副产物 抗性基因 胞外聚合物 

分 类 号:TU991[建筑科学—市政工程]

 

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