农业环境科学学报2011，Vol.30Issue(2)：289-294,6.
赤泥颗粒对韭菜吸收污染土壤中铅锌的抑制效应研究
Inhibition Effect of Granulated Red Mud to Leeks Absorption in Lead and Zinc Polluted Soil
摘要
Abstract
Heavy metal pollution is one of the typical types of soil pollution.The main objective of the study is to analyse the passivation mechanism of granulated red mud to the heavy metals in soil and determine the best granulated red mud treatment in remediating soil contaminated with heavy metals that contribute to the growth of leeks.A treatment with granulated red mud addition was used to repair the soil which was polluted by Pb and Zn in incubation experiment.The concentration of heavy metals in soil (with and without leeks ) at different stages and leeks were measured by flame atomic absorption spectrophotometer.Experiments indicated that granulated red mud could control the release of OH-, promote the transformation of heavy metals' chemical fractionation like Pb and Zn and inhibit biological absorption.The results showed that the optimal treatment with granulated red mud addition for remediation of lead-zinc contaminated soil was 5％, reducing the bio-available fraction of Pb and Zn in contaminated soil by 41.03％ and 26.55％ respectively during remediation time.In the combined remediation of lead-zinc contaminated soil and the effects of growth on leeks, the optimal treatment with granulated red mud addition for remediation of lead-zinc contaminated soil was 1％, thereby reducing the bio-available fraction of Pb and Zn in contaminated soils by 24.81％ and 15.9 ％ respectively during remediation time.Repair capacity of granulated red mud to lead-zinc waste soil was :Pb＞Zn.关键词
重金属/钝化/生物有效态/韭菜Key words
heavy metals/ passivation/ bio-available/ leeks分类
资源环境引用本文复制引用
刘艳,罗琳,罗惠莉,田杰,魏建宏..赤泥颗粒对韭菜吸收污染土壤中铅锌的抑制效应研究[J].农业环境科学学报,2011,30(2):289-294,6.基金项目
国家自然科学基金项目(50874046) （50874046）
湖南教育厅科技项目(08A032) （08A032）
