摘要
为了探索人工湿地植物和基质中重金属的分布规律,选择西安市皂河人工湿地示范基地为研究区域,通过测定该湿地水、基质和植物中Cr和Cu的浓度,对该湿地中Cr和Cu的分布特征、转移富集特性以及重金属含量的相关性进行分析。结果表明:(1)芦苇和香蒲各部位中Cr浓度表现为根>茎>叶,而Cu浓度则表现为根>叶>茎,但都比其根际基质中的浓度小得多;(2)芦苇和香蒲中Cr和Cu的迁移指数差距较小,表明植物的种类不是影响TF的主要因素;植物中Cu的生物富集系数都大于Cr,说明基质中的Cu更易被植物的根吸收;(3)水样和基质中的Cr浓度、植物叶和水样中Cu浓度呈正相关,植物茎与基质之间Cr和Cu浓度均呈正相关,表明基质中Cr和Cu浓度会影响植物茎中Cr和Cu浓度,植物茎和叶之间Cr和Cu浓度呈正相关,表明植物内部Cr和Cu易于由茎向叶的转移。
In order to explore the distribution of heavy metals in the constructed wetland plants and substrate, the Zao river constructed wetland demonstration base was selected in this study. The concentrations of Cr and Cu in plants and substrate were determined to analyze the characteristics of distribution, enrichment, transfer and correlation of heavy metals in constructed wetland. The results showed that the Cr concentrations in various parts of reed and typha were as the follows, root > stem > leaf, while Cu concentrations in various parts of reed and typha were as the follows, root > leaf > stem, but both were much lower than that in rhizosphere matrix. There was no obvious difference of Cr and Cu migration index(TF) between reed and typha, indicating that plant species was not the main factor affecting TF. The biological enrichment coefficient(BCF) of Cu was greater than that of Cr in both reed and typha, indicating that Cu in the matrix was more easily absorbed by plant roots. The Cr concentrations in water and matrix, the Cu concentrations in plant leaves and water sample were positively correlated. Both Cr and Cu concentrations were positively correlated between the stems and the substrate, indicating that Cr and Cu concentrations in the matrix would affect these concentrations in the stems. The positive correlation between Cr and Cu concentration between stem and leaf indicated that Cr and Cu were easily transferred from stem to leaf.
作者
葛光环
陈爱侠
寇坤
储玖琳
GE Guang-huan;CHEN Ai-xia;KOU Kun;CHU Jiu-lin(School of Tourism and Environment,Ankang University,Ankang 725000,China;Engineering Technology Research Center for Water Resource Protection and Utilization of Hanjiang River/South Shaanxi Ecological and Economic Research Center/Collaborative Innovation Center of Qinba Land and Resources Utilization and Eevironment Protection,Ankang 725000,China;School of Environmental Science and Engineering,Chang’an University,Xi’an 710054,China)
出处
《江西农业学报》
CAS
2020年第1期115-119,128,共6页
Acta Agriculturae Jiangxi
基金
安康学院高层次人才科研启动项目“序批式生物膜反应器处理养殖废水过程中N2O释放特征及减排措施研究”(2018247)
国家级大学生创新创业训练计划项目“安康学院砚月湖人工湿地环境净化功能研究”
陕西省教育厅自然科学研究项目“陕南养殖发酵废水深度处理工艺及其N2O减排措施研究”(19JK0015)
关键词
人工湿地
重金属转移
富集性
相关性
Constructed wetland
Heavy metal transfer
Enrichment
Correlation
