臭氧氧化-粉末活性炭-超滤对污水厂二级出水中抗生素抗性基因的去除效能及影响因素
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1.北京建筑大学城市雨水系统与水环境教育部重点实验室;2.北京建筑大学环境与能源工程学院;3.北京市市政工程设计研究总院有限公司

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X703

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国家自然科学基金(52370004、52070011)、北京建筑大学研究生创新项目资助(PG2024085)


Removal Efficiency and Influencing Factors of Antibiotic Resistance Genes in Secondary Effluent by the process of O3 -PAC-UF
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Key Laboratory of Urban Rainwater System and Water Environment Ministry of Education, Beijing University of Civil Engineering and Architecture

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    摘要:

    抗生素抗性基因(Antibiotic Resistance Genes,ARGs)作为新兴环境污染物已对人类健康造成威胁,研究表明,污水处理厂的二级出水是环境中ARGs的重要来源。采用臭氧预氧化结合粉末活性炭PAC(Powdered Activated Carbon,PAC)与超滤(Ultrafiltration,UF)组合工艺处理污水厂二级出水,考察O3投加量与水样的pH、温度对二级出水中不同形态ARGs去除效果的影响因素和作用机理。结果表明:ARGs被O3氧化失活后,经过PAC吸附与UF膜的过滤能得到更为有效的去除;在O3最佳投加量(2.0 mg/L)条件下,O3-PAC-UF组合工艺对二级出水中不同类型ARGs(tetA、tetC、tetG、sulI、sulII)和其他污染物(intⅠ1、16S rRNA)的去除量为102.67 ~ 103.92 copies/mL,且对细胞态和游离态ARGs去除效果明显增强;升高pH值和较低温度均利于ARGs的去除;O3分子的直接氧化作用居于二级出水中ARGs去除机制的主导地位。综上,臭氧联合粉末活性炭与超滤组合可以有效去除二级出水中的抗生素抗性基因。

    Abstract:

    ARGs as emerging environmental pollutants pose a threat to human health, and studies show that secondary effluent from sewage treatment plants is an important source of ARGs in the environment. Ozone pre-oxidation combined with PAC and UF was used to treat the secondary effluent from the wastewater treatment plant, and the factors and mechanisms of O3 dosage, pH, and temperature on the removal of different forms of ARGs in the secondary effluent were investigated. The results show that ARGs could be more effectively removed by PAC adsorption and UF after oxidative inactivation by O3; under the condition of optimal O3 dosage (2.0 mg/L), the combined O3-PAC-UF process could remove different types of ARGs (tetA, tetC, tetG, sulI, sulII) and other pollutants (intⅠ1, 16S rRNA) from the secondary effluent. The removal of different types of ARGs (tetA, tetC, tetG, sulI, sulII) and other pollutants (intⅠ1, 16S rRNA) by the combined process is 102.67~103.92 copies/mL, and the removal of cellular and free ARGs is significantly enhanced; the removal of ARGs is facilitated by the elevated pH and lower temperature; the direct oxidation of O3 molecules dominate the removal of ARGs in the secondary effluent. In conclusion, ozone combined with PAC and UF can effectively remove antibiotic resistance genes from secondary effluent.

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孙丽华,邓斯,史鹏飞,等. 臭氧氧化-粉末活性炭-超滤对污水厂二级出水中抗生素抗性基因的去除效能及影响因素[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-11-20
  • 最后修改日期:2024-06-17
  • 录用日期:2024-06-24
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