Long-term effects of untreated wastewater on soil bacterial communities
Long-term effects of untreated wastewater on soil bacterial communities
复制标题
未经处理的废水对土壤细菌群落的长期影响
DOI：
10.1016/j.scitotenv.2018.07.223
复制
发表时间：
2019-01-01
影响因子：
9.8
通讯作者：
Wang, Renqing
中科院分区：
文献类型：
--
作者：
Shen, Tianlin;Liu, Lu;Wang, Renqing
46年来（1957-2002），污水灌溉增加了土壤中重金属和有机污染物的数量，改变了中国东北沈阳的细菌群落。有不同的重金属和石油污染物在两种类型的土地利用（玉米田和稻田）的表征。玉米田重金属污染的内梅罗综合指数（1.17-4.73）高于水稻田（0.57-1.64）。本研究采用分子生物学技术和生物化学技术对土壤微生物多样性进行了分析。稻田土壤微生物群落代谢活性高于玉米地。饱和芳烃和多环芳烃等有机污染物对土壤细菌组成有显著影响。重金属对微生物群落的干扰方式不同。砷（As）和铅（Pb）改变了群落组成，降低了微生物多样性;铜（Cu）降低了土壤中细菌的丰度;镉（Cd）和铬（Cr）降低了细菌的代谢能力。(C)2018 Elsevier B. V.版权所有。
For 46 years (1957-2002), irrigation with wastewater has increased the amount of heavy metal and organic contaminants in soils and altered bacterial communities in Shenyang, northeastern China. There has been characterization of the different heavy metal and petroleum contaminants in two types of land uses (cornfields and paddy fields). The Nemerow composite indices of heavy metal contaminants have been higher in cornfields (1.17-4.73) than those in paddy fields (0.57-1.64). Molecular-based techniques and biochemical-based techniques were used to analyze soil microbial diversity in our study. The metabolic activity of soil microbe communities was higher in paddy sites than that in cornfields. Organic pollutants such as saturated and polycyclic aromatic hydrocarbons have significantly affected soil bacterial compositions. Heavy metals differed in how they disturbed the microbial communities. Arsenic (As) and lead (Pb) shifted the community composition and decreased microbial diversity; copper (Cu) reduced bacterial abundance in soil; and cadmium (Cd) and chromium (Cr) lowered the metabolic capabilities of bacteria. (C) 2018 Elsevier B.V. All rights reserved.