潜在生态危害指数法评价中重金属毒性系数计算

Calculation of Heavy Metals' Toxicity Coefficient in the Evaluation of Potential Ecological Risk Index

在众多用潜在生态危害指数法评价重金属污染的文章中,只采用了7个重金属元素的毒性系数,但有的重金属仍是环境污染的重要组成部分。针对此情况,文章根据Hakanson的计算原则,结合陈静生的计算方法,重新计算了十种重金属元素的毒性系数,最后给出了12种重金属的毒性系数,它们分别是Ti=Mn=Zn=1<V=Cr=2<Cu=Ni=Co=Pb=5<As=10<Cd=30<Hg=40。

Only 7 heavy metals＇ toxic coefficients are used to assess pollution degree of heavy metals in many papers that use the method of Potential Ecological Risk Index （RI）, but there are still other important heavy metals not employed to calculate toxic coefficient. Because of this, 10 heavy metals＇ toxic coefficients are recalculated on the principle of Hakanson combining with the method of Chen Jingsheng, with 12 heavy metals＇ toxic coefficients as Ti=Mn=Zn=1〈V=Cr=2 〈Cu=Ni= Co=Pb=5 〈As=10〈Cd=30 〈Hg=40.