摘要
重金属是近岸海域常见污染物之一,以辽东半岛东岸碧流河口潮间带海域为研究区域,使用WSS重力沉积物采样器,钻取2根柱状样,对该海域沉积物中的7种重金属元素Cu、Pb、Zn、Cr、Ni、Mn、Co的含量、污染程度及潜在生态风险进行检测和分析评价。结果表明:7种重金属元素含量的平均值分别为33.86 mg/kg、79.24 mg/kg、82.57 mg/kg、141.14 mg/kg、77.62 mg/kg、952.28 mg/kg、49.09 mg/kg;7种重金属元素的I;平均值分别为1.04(Cu)、0.98(Pb)、-0.32(Zn)、0.89(Cr)、1.29(Ni)、1.02(Mn)、0.93(Co),表明研究区重金属的综合潜在生态风险是主要由Co、Ni、Cu、Pb引起;7种重金属元素的潜在生态风险系数平均值分别为15.53(Cu)、5.68(Cr)、14.84(Pb)、3.11(Mn)、15.88(Co)、1.21(Zn)和18.91(Ni),72个样品的RI平均值为75.27,所测样品都属于低生态危害。根据地累积指数与潜在生态风险系数评价结果,总体来说碧流河入海口附近海域沉积物生态风险较轻微,研究区重金属的主要来源为工、农业污水和交通污染。
Heavy metals are one of the common pollutants in coastal water. This paper takes the intertidal zone of Biliu Estuary on the east coast of Liaodong Peninsula as the study area, analyzes and evaluates the content, pollution degree and potential ecological risks of seven heavy metal elements Cu, Pb, Zn, Cr, Ni, Mn and Co of two collected columnar samples. The results showed that the average contents of seven heavy metal elements in the sediments of the study area were 33.86 mg/kg, 79.24 mg/kg, 82.57 mg/kg, 141.14 mg/kg, 77.62 mg/kg, 952.28 mg/kg and 49.09 mg/kg respectively. The I;average values of seven heavy metal elements were 1.04(Cu), 0.98(Pb),-0.32(Zn), 0.89(Cr), 1.29(Ni), 1.02(Mn) and 0.93(Co) respectively, indicating that the Comprehensive potential ecological risks of heavy metals in the study area are mainly caused by Co, Ni, Cu and Pb.The average values of potential ecological risk coefficients of seven heavy metal elements are 15.53(Cu), 5.68(Cr), 14.84(Pb), 3.11(Mn), 15.88(Co), 1.21(Zn) and 18.91(Ni) respectively. The average value of RI of 72 samples is 75.27.All samples are at the level of low-risk to ecology. Generally speaking, the ecological risk of sediments near the mouth of Biliu River is slight. The main sources of heavy metals in the study area are from industrial and agricultural sewage and traffic pollution.
作者
张威
苏世兵
李宁
ZHANG Wei;SU Shibing;LI Ning(School of Geographical Sciences,Liaoning Normal University,Dalian,Liaoning 116021,China)
出处
《贵州师范大学学报（自然科学版）》
CAS
2022年第1期6-12,共7页
Journal of Guizhou Normal University：Natural Sciences
基金
辽宁省特聘教授课题项目(60618006)。
关键词
沉积物
重金属
污染评价
辽东半岛
碧流河口
sediment
heavy metals
pollution assessment
Liaodong Peninsula
Biliu Estuary
