连云港南海域沉积物重金属分布及其潜在生态风险评价

doi:10.3969/j.issn.1000-1565.2015.03.011

摘要/Abstract

摘要： 根据2013年3月份和10月份连云港南海域11个站位沉积物重金属(Cu,Zn,Pb,As,Cd,Hg)的调查数据,重点分析了重金属含量时空分布特征,采用Hakanson潜在生态风险指数法对重金属潜在生态风险性进行评价.结果表明:从空间分布来看,3月份6种重金属含量空间分布总体趋势均为河口区＞倾倒区＞养殖区,10月份Cu,Zn,Pb,As的分布规律一致,即倾倒区＞河口区＞养殖区,倾倒区Cu,Zn,Pb,As,Cd 5种重金属分布均有由倾倒区中心向外含量逐渐降低的规律,说明倾倒的疏浚物是该海区重金属污染的重要来源;从时间上看,多数站位重金属含量3月份数值高于10月份;调查区内重金属的潜在生态风险指数均小于40,表明该海域表层沉积物重金属对海洋生态系统的潜在危害风险低;3月份各重金属对该海域潜在生态危害顺序为Hg＞Cd＞As＞Cu＞Pb＞Zn,10月份为Hg＞As＞Cd＞Cu＞Pb＞Zn;养殖区重金属生态风险指数均较低,这对该区海水养殖提供了重要参考.

关键词: 连云港, 沉积物, 重金属, 倾倒区, 潜在生态风险

Key words: Lianyungang, sediments, heavy metals, dumping area, potential ecological risk

中图分类号:

X826

田慧娟,刘吉堂,吕海滨,张瑞. 连云港南海域沉积物重金属分布及其潜在生态风险评价[J]. 河北大学学报(自然科学版), 2015, 35(3): 289-297.

TIAN Huijuan,LIU Jitang,L(U) Haibin,ZHANG Rui. Distribution pattern and the potential ecological risk evaluation of heavy metals in the sediments in Lianyungang south sea areas[J]. Journal of Hebei University (Natural Science Edition), 2015, 35(3): 289-297.

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