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施用城市污泥堆肥后林业土壤中重金属的潜在生态风险评价Potential Ecological Risk Assessment of Heavy Metals in the Forestry Lands of Application of Municipal Sludge Compost
翟羽佳, 封莉, 马博强, 张立秋
重金属, 潜在生态风险评价, 城市污泥堆肥, 林业土壤Heavy Metals; Potential Ecological Risk; Municipal Sludge Compost; Forestry Land
《Advances in Environmental Protection》, Vol.4 No.1B, 2014-04-24
Application of municipal sludge compost in forestry
land will not directly bring pollutants, such as heavy metals, into food chain,
but it will change the content of heavy metals in soil. This paper studied
potential environment risk of heavy metals in Ginkgo land and Plum blossom land
after application of compost. The ecological risk index was used to evaluate
the potential ecological risk of heavy metals in soil. The results showed that
one year after fertilization, the Ginkgo and Plum lands had low ecological risk
in general, where Cd and Hg were the main pollution factors. However the pollution
of Hg in Ginkgo forest had reached high ecological risk. Moreover the
ecological risk is higher when the application of compost amount is greater.
Also, it can be found that soil background value is an important factor when
applying sewage sludge compost in forest lands.