纳米零价铁对耐四环素菌耐药特性的影响  

Influence of nanoscale zero-valent iron(n ZVI) on resistance character of tetracycline resistant bacteria

作　　者：陆贤[1,2] 郭美婷[1,2] 张伟贤[1,2] LU Xian;GUO Mei-ting;ZHANG Wei-xian(State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China;College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China)

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]同济大学环境科学与工程学院,上海200092

出　　处：《中国环境科学》2017年第1期381-385,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(51308399)

摘　　要：研究了纳米零价铁对污水中耐四环素菌的影响.在不同浓度、反应时间和含氧条件下用纳米零价铁对耐药细菌进行处理.结果表明,当纳米零价铁终浓度为5000mg/L,反应时间为12h,厌氧条件下,纳米零价铁对耐四环素菌有较好的抑制效果.纳米零价铁对细菌的耐药能力有消极作用,因而引起耐药性的减弱.50mg/L浓度的纳米零价铁较大提高了基因转移效率,为原来的2.15倍,因此需综合评估纳米零价铁对耐药性的影响.Effect of nanoscale zero-valent iron(nZVI)on tetracycline resistant bacteria in wastewater was investigated.Specifically drug resistance,gene transfer,microbial growth and separation in municipal wastewater were examined.Tetracycline resistant bacteria were treated with nZVI particles under a verity of experimental conditions such asconcentration,reaction time,availability to dissolved oxygen and redox state.Experimental results suggest that nZVI waseffective for the inactivation of tetracycline resistant bacteria when nZVI concentration is over5,000mg/L,or reaction timewas over12hours under anaerobic condition.nZVI could also trigger rapid decrease on the antibiotic resistance.Furthermore,addition of50mg/L nZVI could enhance the transfer efficiency by215%.Results demonstrate that nZVI was highly reactivein wastewater and there was an urgent need to understand the influence of nZVI on microbial drug resistance.

关 键 词：纳米零价铁 耐四环素菌 耐药特性 基因转移 

分 类 号：X172[环境科学与工程—环境科学]