广州市公园土壤重金属含量特征及潜在生态危害评价

为研究广州市公园的土壤重金属累积程度及其对环境的影响,在6公园中采集表层土壤样本,分析测定表层土壤中的Cd、Cu、Ni、Pb、Zn等5种重金属的含量及相关性,运用潜在生态危害指数法对6公园土壤污染状况进行评价。结果显示:Cu-Zn、Cd-Ni、Cd-Pb之间的相关性达到极显著水平,采用潜在生态危害指数评价各重金属的危害程度依次为:Cd>Pb>Cu>Zn>Ni。其中Cd是广州6个公园土壤的主要污染重金属元素。各公园潜在生态危害指数依次为:瀛州生态园(166.86)>人民公园(99.20)>珠江公园(94.27)>麓湖公园(88.83)>流溪河国家森林公园(54.55)>广东树木园(35.19)。

Character of content and contamination evaluation for heavy metal in the soil of Guangzhou parks

In order to study the accumulation extent and environmental effect on the heavy metal in soil,the soil samples were collected from the surface soil in six urban parks of Guangzhou,and the content and correlation of Cd,Cu,Ni,Pb and Zn were analyzied.Evaluation of the soil pollution was conducted adopting the potential ecology risk index method.The results showed that Between Cu and Zn,Cd and Ni,Cd and Pb,the relevance achieved the extremely remarkable level.By means of potential ecological risk method reach,every heavy metal extent of injury is in proper order：CdPbCuZnNi.Each park potential ecological risk index in turn is：Yingzhou ecological garden（166.86）the people park（99.20）Zhujiang park（94.27）Luhu park（88.83）Liuxi river country forest park（54.55）Guangdong trees garden（35.19）.