锦州湾三河入海口重金属分布特征及污染评价  

DISTRIBTION OF HEAVY METALS AT THE JUNCTION OF LIANSHAN, WULI AND CISHAN ESTUARIES, JINZHOU BAY AND THEIR CONTAMINATION EVALUATION

作　　者：张思洋 于大涛[2] 张戈[1] ZHANG Siyang;YU Datao;ZHANG Ge(School of Geography,Liaoning Normal University,Dalian 116029,China;National Marine Environmental Monitoring Center,Dalian 116023,China)

机构地区：[1]辽宁师范大学地理科学学院,大连116029 [2]国家海洋环境监测中心,大连116023

出　　处：《海洋地质前沿》2020年第6期20-25,共6页Marine Geology Frontiers

基　　金：国家海洋局海域管理技术重点实验室基金(201611);辽宁省社会科学规划基金(L16CGL009)。

摘　　要：基于锦州湾24个海水样品和12个表层沉积物数据,分析了锦州湾三河入海口重金属含量及空间分布特征,采用单因子评价法及地累积指数法对研究区污染情况做出评价。结果表明:表层沉积物重金属元素含量随远离河口区而减少,含量顺序Zn>Cu>Cr>Pb>Hg>Cd。根据地累积指数计算,Zn有3个站位达到重污染,2个站位中度污染,剩余站位为偏中度污染。Cu、Pb、Cr元素在轻度污染和偏中度污染之间。研究区海水中重金属污染物主要为Pb和Zn,8个站位Pb含量超标,Zn有1个站位超标。Heavy metal distribution patterns were studied in this paper based on 24 seawater samples and 12 surface sediment samples collected from the junction of three estuaries,i.e.the Lianshan estuary,Wuli estuary and Cishan estuary,of Jinzhou Bay.The methods of single factor evaluation and geoaccumulation index were adopted to evaluate the contamination level of the area.The results show that the element contents of the surface sediment are in an order of Zn>Cu>Cr>Pb>Hg>Cd,and their contents decrease with the distance increase from the coast.According to the geoaccumulation index,it is heavily polluted by Zn in three stations,moderately polluted in two stations,and mild moderately polluted in the rest stations.Cu,Pb,and Cr elements are all ranked between the light pollution and mild moderate pollution.The pollutants in the seawater in the study area are dominated by Pb and Zn.According to the records,the Pb content exceeds the standard at eight stations.There is only one station where Pb contents exceeds the standard.The other stations are qualified to meet the requirements for marine management and protection of corresponding functional areas.

关 键 词：入海口 重金属 海水水质 表层沉积物 锦州湾 

分 类 号：X55[环境科学与工程—环境工程] X820.4