摘要
Abstract
By constructing a dual index model for plant screening,suitable plants such as sunflowers,alfalfa,and tall fescue were selected for the remediation of heavy metal contaminated soil around the coking plant in Lvliang city.To comprehensively understand the remediation effect of plant remediation technology,three typical polluted plots were selected for field experiments in Lvliang city,and different plant combination modes and auxiliary measures were adopted.The results showed that with the extension of restoration time,the removal rates of Cd and Pb and the biomass increment of 667 m2 both showed an upward trend.After 2.5 years,the Cd removal rate reached 61.2%and the Pb removal rate reached 57.3%.Compared with traditional physical restoration methods,plant restoration technology has the advantages of short restoration cycle,low cost,and good soil restoration effect,with a cost reduction of about 68.3%.关键词
重金属污染/土壤/植物修复技术/田间试验Key words
heavy metal pollution/soil/plant restoration technology/field experiment分类
资源环境
