植物生态修复技术在城市公园绿地重金属污染土壤中的应用研究

Application of Plant Ecological Remediation Technology in Heavy Metal Contaminated Soil in Urban Park Greenbelt

研究通过对城市公园绿地土壤重金属含量进行检测分析,对不同重金属的相关性进行了分析。采用了分析常用的植物的富集系数和对土壤的重金属的转运系数进行了分析评价。实验结果表明,城市公园绿地土壤重金属含量累积强度排序为Pb>Cu>Co>Fe>Zn>Cr>Mn>Ni>As;城市公园绿地的土壤重金属来源较为复杂,且来源不单一。可修复重金属植物中,榆树和紫丁香的富集能力最强,其次是小叶杨和高羊茅。转运系数最大的植物是小叶杨和高羊茅,其次是紫丁香和榆树。筛选出对重金属极具富集能力的植物,为城市公园绿地土壤重金属污染植物修复方法提供参考依据。

This study analyzed the correlation between different heavy metals by detecting and analyzing the heavy metal content in soil of urban park green spaces.The enrichment coefficient of commonly used plants and the transport coefficient of heavy metals in soil were analyzed and evaluated.The experimental results show that the cumulative intensity of heavy metal content in soil of urban park green spaces is ranked as Pb>Cu>Co>Fe>Zn>Cr>Mn>Ni>As.The sources of heavy metals in the soil of urban park green spaces are complex and diverse.Among the heavy-metal plants that can be repaired,elm and lilac have the strongest enrichment ability,followed by small leaved poplar and tall fescue.The plants with the highest transport coefficient are small leaved poplar and tall fescue,followed by lilac and elm.The research screens out plants with high enrichment ability for heavy metals,providing a reference for phytoremediation methods for heavy metal contaminated soil in urban park green spaces.