【摘要】 取白洋淀底泥制成3种不同厚度的基质种植芦苇,另外设置不含底泥的麦地土壤和旱地芦苇土壤,定期对基质采样,测定底泥中重金属Cu,Cd,Pb,Zn浓度并进行比较分析。试验表明,底泥和供试麦地土壤和芦苇土壤已受到重金属Cu,Cd,Pb,Zn不同程度污染;Cd浓度均已超过全国土壤质量三级标准,分别为1.35~1.59 m g/kg和1.078~1.16 m g/kg,污染程度严重。其次为Pb和Zn,Cu为轻微污染。随着芦苇的生长,底泥和麦地及芦苇土壤中大部分重金属浓度呈不同程度下降趋势,表明芦苇对有害重金属有一定抗性和富集作用,旨在为底泥污染治理提供科学依据。更多还原

【Abstract】 Three foundations of different thickness were made with sediments from Baiyangdian.Besides,soil from planting wheat and reed without sediments was also put into experiment as compared.Foundation was collected periodically and the concentrations of heavy metal Cu,Cd,Pb,Zn were determinated.The analytical results shows sediments and soils in the experiment are polluted by heavy metal Cu,Cd,Pb and Zn with different degree.The concentration of Cd has already been over national soil quality standard Ⅲ,respectively 1.35～1.59 mg/kg and 1.078～1.16 mg/kg and the pollution is serious.The pollution of Pb and Zn is followed that of Cd.Cu pollution is little.The concentrations of most heavy metal in sediments and soils take on decrease trend on different degree.It shows heavy metal can be enrichmented by reed and reed has the capability of resisting heavy metal.It aims to offer scientific countermeasure to sediments remediation.更多还原