基于梯形模糊数的胶州湾东部沉积物重金属生态风险评价

Ecological risk evaluation of heavy metals in sediments of east Jiaozhou bay based on trapezoidal fuzzy numbers

通过整理近10 a来公开发表的有关胶州湾东部沉积物重金属的数据,对数据进行模糊处理,构建基于梯形模糊数的生态风险评价模型。结果表明各重金属的污染程度跨度较大,其中Zn的污染水平跨度最大;就生态风险而言,胶州湾东部除毒性系数较大的Hg和Cd处于低-高风险,海泊河口除Hg和Cd分别处于高-极高风险和高-很高风险外,其余重金属均为低风险;胶州湾东部和海泊河口沉积物重金属综合生态风险分别为为低-高风险和高-极高风险,分别隶属于中等风险和高风险的可能性最大。在进行重金属风险评价时,应重视Hg和Cd的风险。

The data about heavy metals in sediments of Jiaozhou bay in papers published publicly about recent 10 years were collected and analyzed.And the heavy metals’ potential ecological risk evaluation model was built based on trapezoidal fuzzy numbers.The results indicate that the pollution level of every heavy metal is large-span,especially Zn.The ecological risk of Hg and Cd in east Jiaozhou bay is at low-high level,it is high-utmost high and high-very high risk in Haibo estuary,other heavy metals is at low risk.The integrated ecological risk of heavy metal in sediment of east Jiaozhou bay and Haibo estuary is at low-high and high-very high level risk,and the possibility belonging to medium and high risk level is bigger than that of others level.The risk of Hg and Cd should be paid more attention to in the heavy metals’ ecological risk evaluation.