添加酸改性赤泥对模拟人工湿地生态系统的影响  

EFFECT OF ACID-ACTIVATED RED MUD ON THE SIMULATED CONSTRUCTED WETLAND ECOSYSTEM

作　　者：何晨凤 张芳娟[1] 梁晓倩 王中玉[1] 田永兰[1] 张化永[1] HE Chen-feng;ZHANG Fang-juan;LIANG Xiao-qian;WANG Zhong-yu;TIAN Yong-lan;ZHANG Hua-yong(Research Center for Engineering Ecology and Nonlinear Science,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学工程生态学与非线性科学研究中心,北京102206

出　　处：《环境工程》2018年第7期51-55,61,共6页Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2015ZX07204-007;2015ZX07204-011)

摘　　要：基于模拟的人工湿地生态系统,系统研究了酸改性赤泥对氮、磷去除,植物生长和微生物群落的影响。结果表明:添加酸改性赤泥能加快水体氮、磷污染物去除,降低水体和底泥氮、磷浓度;适量添加酸改性赤泥可以促进植物生物量积累,投加量为5 g/L时促进效果最大。变性梯度凝胶电泳(DGGE)、多样性与聚类分析结果表明:增加酸改性赤泥浓度,微生物DGGE图谱丰度(S)、Shannon-Weiner指数(H)和均匀度指数(J)均呈先增加后降低的趋势。酸改性赤泥浓度为2 g/L时达到最大,且系统中微生物的优势种也随之变化,优势种的优势度与微生物群落结构相似度逐渐增加,出现了更适应酸改性赤泥环境的微生物。综合来讲,适量添加酸改性赤泥有利于模拟人工湿地生态系统功能的发挥。The effects of acid-activated red mud on the removal of nitrogen and phosphorus pollutants,plant growth,as well as the microorganism community were investigated within a simulated constructed wetland ecosystem. The results showed that acid-activated red mud could accelerate the removal of nitrogen and phosphorus pollutants. The plant biomass could be increased by adding moderate acid-activated red mud,and the highest increasing effect was reached at the concentration of 5 g/L. As demonstrated by the DGGE, diversity and clustering analyses, with the increase of acid-activated red mud concentration,the abundance of microbial DGGE profiles（ S）,Shannon-Weiner index（ H） and evenness index（ J） increased first and then decreased,and reached their maximum values when the concentration of acid-activated red mud was 2 g/L. The dominant microbial species within the system varied with the acid-activated red mud concentration rising. Meanwhile,the dominance of the dominant species and the similarity of microbial community structure increased gradually,microorganisms with more adaptable to acid-activated red mud appeared. In general,adding appropriate concentration of acid-activated red mud was conducive to the function of simulated constructed wetland ecosystem.

关 键 词：酸改性赤泥 模拟人工湿地 氮磷去除 植物 微生物 底泥 

分 类 号：X171[环境科学与工程—环境科学] X703