期刊
ENVIRONMENTAL POLLUTION
卷 218, 期 -, 页码 1255-1261出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2016.08.081
关键词
Leachate treatment plants (LTPs); Antibiotics resistance genes (ARGs); Receiving bodies; Heavy metals; Landfill
资金
- National Natural Science Foundation of China [41671481]
- National Science and Technology Major Project [2016YFC0400706]
- Science & Technology Plan Project of Guangdong [2013B090200016, 2014A020216039, 2015A3FC0023, 2016A020221036]
The antibiotic resistance genes (ARGs) from urban waste may spread to the environment with the discharge of leachate. Fifteen types of ARGs, including tetracycline, sulfonamides, AmpC beta-lactamase and the class 1 integron gene were detected in the samples from the largest leachate treatment plant (LTP) in Guangzhou and its effluent receiving bodies (soil and surface water). The results showed that ARGs in leachates were in high levels and varied with seasons. The abundance of ARGs in the influent from high to low was in the turn of summer, winter, spring. About 2 to 4 orders of magnitude of ARGs were eliminated by the whole leachate treatment process. The predominant ARGs in the receiving soil were intl1, tetB, sul2, tetA and tetX, while those in the receiving surface water were sul2, intl1 and sail, and the concentrations of ARGs in the receiving bodies were higher than those in the other natural bodies by 1 to 2 orders of magnitude. In addition, the results of bivariate correlation analysis showed that the abundances of ARGs (tetC, tetW, sul1, sul2, intl1 and FOX) were in significant correlation with the concentrations of heavy metals (Cu, Zn, Ni and Cr) (p < 0.05). LTPs are more likely to be sources of ARGs than wastewater treatment plant (WWTP) and need to be focused on. (C) 2016 Elsevier Ltd. All rights reserved.
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