摘要
于2014年6月、8月、10月和12月对浙江省温州地区沿海主要贝类养殖区的海水、表层沉积物进行取样,研究了重金属Cu、Cd、As、Pb在贝类养殖区海水和表层沉积物中的分布特征,并对养殖区进行了生态环境质量评价及潜在生态风险评价。结果表明:所测养殖区海水中Cu、As属于本底水平,Pb、Cd已属中度到重度污染,污染程度顺序为Cd>Pb>Cu>As;表层沉积物中各重金属的污染程度顺序依次为Pb>As>Cu>Cd;潜在生态风险评价结果表明,贝类养殖区重金属Cu、Pb、As属于轻微潜在生态危害水平;Cd属于中等潜在生态危害,各重金属的潜在生态危害程度顺序依次为Cd>Pb>As>Cu,从多种重金属的潜在生态危害指数(RI)看,所调查的贝类养殖区域RI值均小于140,为低潜在生态风险。
Samples of seawater and surface sediments were taken from the main shellfish culture area of Wenzhou in June,August, October and December,2014,and the content and distribution of heavy metals(Cu, Cd, As, Pb) in the seawater and surface sediments were analyzed. Eco-environmental quality and potential ecological risk in the shellfish culture area were al-so assessed.The results showed that: the contents of Cu and As in seawater were in nature level and the contents of Pb and Cd in seawater were in middle to heavy pollution level. the order of pollution degree was Cd>Pb>Cu>As.The potential ecological risk of Cu, Pb, As in the shellfish culture area to the ocean ecology system was very light and that of Cd to the ocean ecology system was middle. The potential ecological risk index(RI) of these heavy metals in the shellfish culture area was less than140, that meant the environmental quality of the culture areas was good.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2016年第S1期376-379,397,共5页
Environmental Science & Technology
基金
温州市海洋与渔业局项目(KH1410001)
关键词
贝类养殖区
重金属
分布特征
生态风险
shellfish culture area
heavy metals
distribution characteristic
ecological risk assessment
