饮用水活性炭净水器对抗生素抗性基因的去除效果  

REMOVAL EFFICIENCY OF ANTIBIOTIC RESISTOME IN ACTIVATED CARBON DRINKING WATER PURIFIERS

作　　者：徐兰 周振超 朱琳 刘扬 帅馨怡 林泽俊 陈红[1] XU Lan;ZHOU Zhen-chao;ZHU Lin;LIU Yang;SHUAI Xin-yi;LIN Ze-jun;CHEN Hong(Institute of Environmental Technology,College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学环境与资源学院环境技术研究所,杭州310058

出　　处：《环境工程》2021年第6期27-33,共7页Environmental Engineering

基　　金：国家自然科学基金(21677121,21876147)。

摘　　要：为了评估不同类型家用饮用水活性炭净水器对常规水质及新型污染物抗生素抗性基因(antibiotic resistance genes, ARGs)的净化能力,购置了6种具有不同滤芯结构的家用活性炭净水器,对常规水质指标及抗性基因的动态变化(80 d)进行跟踪调查。实验结果显示:活性炭净水器能长期有效去除余氯,但对有机物的去除效果随着时间推移而减弱。活性炭的物理性质对净水性能影响较大,比表面积越大,吸附性能就越强,去除有机物的能力就越高。采用qPCR定量分析了饮用水中5种抗性基因,绝对丰度最高的是sul1和tetA,活性炭净水器出水中抗性基因的绝对丰度随时间增加逐渐上升,48~80 d时出水中抗性基因绝对丰度达到较高水平。具有刚性孔隙和渐紧过滤结构的烧结活性炭能对抗性基因起到一定的控制效果。水中有机物质和Ⅰ类整合子intI1在抗性基因的增殖与传播中发挥了重要作用。In order to evaluate the water purification capacities of household activated carbon drinking water purifiers and the behavioral characteristics of antibiotic resistance genes(ARGs), six kinds of household activated carbon water purifiers with different filter structures were purchased in this study. The dynamic changes of conventional water quality indicators and ARGs were tracked for 80 days. The research results showed that activated carbon drinking water purifiers could effectively remove residual chlorine for a long period of time. The removal effect of organic matter deteriorated with time. The physical properties of activated carbon had a great impact on water purification performance. Large specific surface area helped to remove organics. Five ARGs were quantitatively analyzed by qPCR, and the absolute abundances of sul1 and tetA were the highest. The absolute abundances of ARGs in the filtered water gradually increased with time, and reached a high level in 48~80 days in general. Sintered activated carbon with rigid pores and gradually-tight filter structure could play a certain control effect on ARGs. Organic matter and intI1 in water played an important role in the proliferation and transmission of ARGs.

关 键 词：饮用水 活性炭净水器 抗生素抗性基因 荧光定量PCR 

分 类 号：TU991.2[建筑科学—市政工程]