中文摘要：

对赣江中下游城市断面10个监测断面的水体及底泥重金属含量进行了分析。实验结果表明，水体中的重金属除Cd和As的含量超出地表水环境质量标准111类标准外，其他各项监测指标均能达到地表水环境质量Ⅲ类标准。对沉积物7种重金属分析表明，Cu、Pb和Cd重金属含量显著高于鄱阳湖土壤背景值。Cu、Zn、Pb、Cd、Cr、Ni和As含量范围和均值分别为8．29～70．87、27．07；5．98～40．59、18．10；8．33～129．64、35．60；0．55～110．33、14．122；3．96～35．06、11．91；11．67～42．03、25．65和0．31～21．13、5．49mg／kg；沉积物中重金属的污染程度较高，污染评价表明，Cd与Cu是主要的污染因子。潜在生态风险评价显示：沉积物中重金属潜在生态风险指数RI的平均值为608．82，属较强生态危害，5种重金属潜在生物毒性风险大小依次为Cd〉Cu〉Pb〉Cr〉Zn。

英文摘要：

Based on a survey of heavy metal pollution status of water and sediment, the results indicate that the content of every com- ponent except Cd and As in the water meet class Ill standard for surface water evaluation. Compared with environmental quality standard for soils, the content of Cu, Pb and Cd are significantly higher than the background value in Poyang Lake soil. The concen- tration of Cu ranges from 8. 29 to 70. 87 mg/kg（mean：27.07 mg/kg） ; Zn ranges from 5.98 to 40. 59 mg/kg（mean： 18. 10 mg/kg） ; Pb ranges from 8. 33 to 129. 64 mg/kg（mean： 35.60 mg/kg） ; Cd ranges from 0. 55 to 110. 33 mg/kg（mean.. 14. 12 mg/kg） ;Cr ran- ges from 3. 96 to 35.06 mg/kg（mean： 11.91 mg/kg） ; Ni ranges from 11.67 to 42. 03 mg/kg（mean：25.65 mg/kg） ; As ranges from 0. 31 to 21.13 mg/kg（mean：5.49 mg/kg）. The pollution of heavy metals in the sediments of the Ganjinag River is at a high level where Cd and Cu are the main pollution elements. The mean potential ecological risk index is 608. 82 in the lake which is classified as high contaminatiorL The sequence in the degree of potential ecological risks is Cd 〉Cu〉Pb 〉Cr〉Zn.