广州市建成区土壤环境质量试点监测及生态风险评价

Soil environmental quality survey and ecological risk ssessment in urban built-up area

为进一步了解快速城市化过程中城市土壤环境质量状况以及由此带来的环境生态风险,本文以广州市城市建成区表层土壤为研究对象,设置91个监控点位,通过对土壤样品的采集、测定、分析,采用Nemerow Index综合污染指数对土壤环境质量状况进行评价,采用Hakanson潜在生态风险指数法对土壤环境生态风险进行评价,结果表明:广州市建成区土壤环境质量处于清洁(安全)水平,综合污染指数均值为0.23;生态环境风险总体表现为轻微生态危害,潜在生态风险指数均值为133。

In order to further understand the environmental quality of urban soil and the environmental ecological risk caused by rapid urbanization,91 monitoring points were set up in the surface soil of Guangzhou urban built-up area,and the soil sample were collected,measured and analyzed.Nemerow Index comprehensive pollution index was used to evaluate the environmental quality of soil.The Hakanson potential ecological risk index was used to evaluate the ecological risk of soil environment.The results show that:Guangzhou soil environmental quality(safety)is at clean level,the comprehensive pollution index is 0.23;the risk of ecological environment is at slight ecological harm level,potential ecological risk index mean value is 133.