二级表流人工湿地基质中Cr和Cu的分布特征研究  

Distribution characteristics of Cr and Cu in secondary surface flow artificial wetland substrates

作　　者：葛光环 寇坤 张熙龙 闫茹玉 尚思凡 GE Guang-huan;KOU Kun;ZHANG Xi-long;YAN Ru-yu;SHANG Si-fan(School of Tourism and Environment,Ankang University,Ankang 725000,Shaanxi,China;Academician(Expert)Workstation of Shaanxi Province,Ankang University,Ankang 725000,Shaanxi,China)

机构地区：[1]安康学院旅游与资源环境学院,陕西安康725000 [2]安康学院陕西省院士(专家)工作站,陕西安康725000

出　　处：《湖北农业科学》2022年第22期29-33,共5页Hubei Agricultural Sciences

基　　金：大学生创新创业训练计划项目(S202011397046);陕西省安康市科技计划项目一般项目(AK2021-SF-05);陕西省教育厅一般项目(20JK0476);大学生创新创业训练计划项目(S202111397051)。

摘　　要：为了研究在人工湿地基质中Cr和Cu的分布特征,选取皂河人工湿地示范工程中第5系列为研究对象,沿水流方向设置了11个采样点,在7个采样点处设置3个不同深度的采样点,重点分析了重金属总量和各形态含量的空间分布特征。结果表明,在水平方向上Cr和Cu总的含量沿程变化趋势相似,先在采样点1~8下降趋势明显,采样点9、10、11略有升高;在垂直方向上Cr和Cu总量沿深度加深而降低;Cr和Cu在湿地表层基质中的主要赋存形态是残渣态,形态含量大小分布趋势基本相同,4种形态的总量大小表现为残渣态>可还原态>可氧化态>弱酸可溶态;弱酸可溶态、可还原态和可氧化态的Cr和Cu含量随深度加深而不断减少。In order to study the distribution characteristics of Cr and Cu in the artificial wetland matrix,the 5th series in the Soap River artificial wetland demonstration project was selected as the research object,11 sampling points were set along the water flow direction,and 3 sampling points at different depths were set at 7 sampling points.The spatial distribution characteristics of the total amount of heavy metals and the content of each form were analyzed,and the results showed that the trend of the total Cr and Cu content in the horizontal direction was similar along the course,with a significant decrease in sampling points 1 to 8 and a slight increase in sampling points 9,10 and 11;in the vertical direction,the total amount of Cr and Cu decreased along the depth;the main distribution form of Cr and Cu in the wetland surface matrix was the residue state.The distribution trend of the size of Cr and Cu in the wetland surface matrix is basically the same,and the total size of the four forms showed residue state>reducible state>oxidizable state>weakly acid soluble state;the contents of Cr and Cu in the weakly acid soluble,reducible and oxidizable states decreased continuously with depth.

关 键 词：湿地 重金属 基质 

分 类 号：X703.1[环境科学与工程—环境工程]