生态与农村环境学报2024，Vol.40Issue(8)：1113-1120,8.DOI:10.19741/j.issn.1673-4831.2023.0622
不同植物对污染土壤中铜和镉的生物移除效率
Biological Removal Efficiency of Different Plants of Copper and Cadmium in Contaminated Soil
摘要
Abstract
In order to select heavy metal-enriched plants,Pennisetum sinese,Sesamum indicum,Sorghum,Sedum plumbizincicola,Elsholtzia splendens,and Setaria pumila were planted in a copper(Cu)and cadmium(Cd)contamina-ted soil in Jiangxi Province.This study investigated the biomass and heavy metal accumulation characteristics of the six plant species,compared the extraction amount and biological removal efficiency of heavy metals by the plants.The results reveal that the total concentrations of Cu and Cd in the soil were 560.0 mg·kg-1 and 0.80 mg·kg-1,respectively,which were 10.20 times and 1.67 times higher than the soil risk screening values for agricultural land(GB 15168-2018,pH≤5.5,Cu 50 mg·kg-1,Cd 0.3 mg·kg-1),respectively.The biomass of Pennisetum was the highest(41.40 t·hm-2),which is 11.82 times that of Sedum plumbizincicola.Only Elsholtzia splendens had a bioconcentration factor(BCF)over 1 for Cu,and Sedum plumbizincicola had the highest BCF for Cd(46.16),significantly higher than those of the other plants(1.47-9.69).The extraction amount for Cu was the highest in Pennisetum sinese(7.7 kg·hm-2)and Elsholtzia splen-dens(6.9 kg·hm-2),but their biological removal efficiencies were only 0.61％and 0.55％,respectively.The extraction amount for Cd in Pennisetum sinese(156.17 g·hm-2)and Sedum plumbizincicola(122.32 g·hm-2)were the highest,with biological removal efficiencies of 8.68％and 6.80％,respectively.Pennisetum sinese can be used for biomass power generation,while the heavy metal content of Sesamum indicum seeds meets the national food safety standards(GB 2762-2022,Cd＜0.5 mg·kg-1)and offers certain economic benefits.Therefore,a Sedum plumbizincicola-Sesamum indicum rotation or monocropping mode of Pennisetum sinese is recommended for the remediation of contaminated soils,providing good biological removal effect and potential economic benefits.关键词
植物修复/土壤/生物移除/Cu和Cd/富集系数Key words
phytoremediation/soil/biological removal/Cu and Cd/bioconcentration factor分类
资源环境引用本文复制引用
叶萍,崔红标,程洁钰,梁家妮,周静..不同植物对污染土壤中铜和镉的生物移除效率[J].生态与农村环境学报,2024,40(8):1113-1120,8.基金项目
安徽省自然科学基金面上项目(2208085MD87) （2208085MD87）
安徽省教育厅重大项目(KJ2020ZD35) （KJ2020ZD35）
淮北矿业集团科技研发资助项目(2022-113) （2022-113）
