污泥施入黄土后Cu、Zn对Cd的淋滤迁移影响  

Leaching of Cu and Zn on Cd migration affect experiments after sludge was applied into loess

作　　者：苟剑锋[1] 高冬香[1] 曾正中[1] 雷勋杰 王厚成[1] 南忠仁[1] 

机构地区：[1]兰州大学资源环境学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2016年第4期440-446,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(51178209)

摘　　要：选择污泥中毒性大或质量分数高的Cd、Cu、Zn作为研究对象,通过室内模拟土柱进行了1 a灌溉用水量5种方案的淋滤对比实验,了解重金属Cu、Zn对Cd在黄土层中淋滤迁移的影响.通过测定淋滤前后土柱和渗出液中的w(Cd),分析污泥重金属Cd在黄土中的淋滤、迁移特征.结果表明:耕作层增加w(Cd)或添加Cu、Zn均对Cd的淋滤迁移有促进作用,污泥Cd大部分仍残留在耕作层中,少部分迁移滞留于剖面中上部,而迁移溶出的量极少.Toxic or high content of Cd,Cu and Zn in sludge were selected as the research objects and an experiment simulating an annual irrigation water consumption of 5 kinds of solution leaching conditions was conducted,which was aimed at studying the leaching migration characteristics of Cu and Zn on Cd in soil,and providing an experimental basis for land use to control heavy metal pollution in loess areas and to analysis the leaching migration characteristics of heavy metals by measuring the leaching of the total amount of Cd before and after soil column and exudates.The results showed that increasing the concentration of Cd or adding Cu and Zn leached migration had a promoting effect of Cd in the plow layer,though most sludge Cd still remaining in the plow layer,stranded in the upper section of a small number of migrations,while the amount of migration of the dissolution was very little.

关 键 词：堆肥污泥 重金属镉 黄土 淋滤迁移 

分 类 号：X705[环境科学与工程—环境工程]