摘要
目前中国地下水中存在较为严重的铁锰污染问题,已被列为国家目前急需解决的多种环境问题之一。文章为探明竹炭混合基质水平潜流人工湿地对含铁锰废水的净化效果和湿地水样中的微生物群落结构特征,在实验室条件下向水平潜流式人工湿地中加入竹质生物质炭,研究湿地污废水中铁锰的浓度变化和微生物群落的结构变化。实验研究发现,人工湿地运行在水力停留时间为24 h的情况下,湿地进水口Fe^(2+)、Mn^(2+)浓度值分别设置为30 mg/L和20 mg/L时,添加了竹炭的石英砂竹炭混合基质的人工湿地对Fe^(2+)、Mn^(2+)去除率较单一石英砂基质人工湿地有明显优势,Fe^(2+)和Mn^(2+)去除率都达到了90%以上,分别为93.46%和90.87%。微生物群落方面,石英砂竹炭混合基质中菖蒲的根际细菌群落丰富度和多样性均大于石英砂基质中菖蒲根际,石英砂竹炭混合基质中细菌在菖蒲的根际周围可以更好地生存。
There is a serious iron and manganese pollution problem in groundwater in China,which has been listed as one of the many environmental problems that need to solve urgently.In order to explore the purification effect of bamboo charcoal mixed substrate horizontal subsurface flow constructed wetland on iron and manganese wastewater and the microbial community structure characteristics,bamboo biomass charcoal was added to the horizontal subsurface flow constructed wetland under laboratory conditions to study the iron and manganese in wetland wastewater concentration changes and changes in the structure of the microbial community.Experimental studies have found that when the constructed wetland is operated with a hydraulic retention time of 24 hours,and the heavy metal content of the wetland set to 30 mg/L and 20 mg/L at the inlet Fe^(2+)and Mn^(2+)concentration values,respectively,and bamboo charcoal added to the quartz sand bamboo charcoal,the mixed matrix constructed wetland has obvious advantages in removing Fe^(2+)and Mn^(2+)than the single quartz sand matrix constructed wetland.The removal rates of Fe^(2+)and Mn^(2+)both reached more than 90%,93.46% and 90.87%,respectively.In terms of microbial community,the richness and diversity of bacterial communities in the rhizosphere of calamus in the mixed matrix of quartz sand and bamboo charcoal are greater than those in the rhizosphere of calamus in the quartz sand matrix.The bacteria in the mixed matrix of quartz sand and bamboo and charcoal can survive better around the rhizosphere of calamus.
作者
王新帅
董堃
杨秀玖
贺瑶
游少鸿
林华
俞果
WANG Xinshuai;DONG Kun;YANG Xiujiu;HE Yao;YOU Shaohong;LIN Hua;YU Guo(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technolagy,Guilin 541004,China;Collaborative Innovaion Center of Waer Pollution Control and Uilization Security in Karst Area,Guilin University of Technology.Guilin 541004.China;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined wih Science and Technology Innovation Base,Guilin 541004.China;Haikou Marine Geological Survey Center,China Geological Survey Administration,Haikou 570100,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2022年第3期73-80,共8页
Environmental Science & Technology
基金
国家自然科学基金(51868010,41867022)
广西高等学校高水平创新团队及卓越学者计划项目(桂财教函[2018]319号)
广西科技基地和人才专项:澜沧江-湄公河水环境技术创新平台(桂科AD19110156)。
关键词
竹炭混合基质
铁锰复合污染污水
菖蒲
高通量测序
bamboo charcoal mixed matrix
Fe and Mn polluted wastewater
calamus
high-throughput sequencing
