硫化钠对土壤汞、镉、铅的植物可利用性的调控  

Regulation of phyto-availability of Hg, Cd, Pb in soil by sodium sulfide

作　　者：陈宏[1] 陈玉成[1] 杨学春[1] 

机构地区：[1]西南农业大学资源环境学院,重庆400716

出　　处：《生态环境》2003年第3期285-288,共4页Ecology and Environmnet

基　　金：重庆市科技攻关项目(1999专项基金)

摘　　要：针对重庆市蔬菜重金属污染现状,通过盆栽试验,研究了硫化钠对污染土壤中Hg、Cd、Pb活性的影响及它们在植物体内的积累效应,筛选出控制叶菜类蔬菜中汞、镉、铅等重金属污染物进入蔬菜的经济有效、易于实施的化学添加剂用量,为蔬菜基地土壤重金属污染控制提供可靠的技术措施。分析结果表明,硫化钠能减少土壤中Hg、Cd的残留量,增加Hg、Cd的植物可利用性;降低土壤Pb的活性,减少Pb的植物可利用性。当硫化钠施用量为0.00351 thm-2时,植物体Pb质量分数下降了23.8%,同时使植物的生物量增加。According to vegetable抯 heavy metal pollution in Chongqing, pot experiments were carried out to study the effect of sodium sulfide on the amelioration of Hg, Cd and Pb in polluted soil and their accumulation in plants. The results showed that sodium sulfide could reduce residual Hg and Cd, and increase phyto-availability of Hg and Cd. Sodium sulfide could reduce the activity of Pb in soil and its phyto-availability. The content of Pb in asparagus lettuce was decreased by 23.8% and biomass increased when the addition level of sodium sulfide was at 0.00351 thm-2.

关 键 词：硫化钠 土壤污染 汞 镉 铅 积累效应 植物 重庆 蔬菜 重金属 可利用性 

分 类 号：X53[环境科学与工程—环境工程]