模拟酸雨对土柱中稀土元素迁移的影响  

EFFECT OF SIMULATED ACID RAIN ON TRANSPORT OF THE RARE EARTH ELEMENTS IN SOIL COLUMN

作　　者：张宇峰[1,2] 姚敏[1] 邵春燕[1] 王晓蓉[3] 骆永明[2] 

机构地区：[1]南京工业大学城建与安全环境学院 [2]中国科学院南京土壤研究所,南京210008 [3]南京大学环境学院,污染控制与资源化研究国家重点实验室

出　　处：《环境化学》2005年第4期379-382,共4页Environmental Chemistry

基　　金：国家自然科学基金资助项目(29890280-1).

摘　　要：模拟研究酸雨对土柱中稀土元素迁移的影响.结果表明,在雨水、酸雨淋溶下,对照组红壤土柱中所含稀土元素有向下迁移的趋势,并且随淋溶液pH值的降低,稀土元素向下迁移的能力增加.外源稀土迁移量的大小顺序为;Ce>La>Nd>Pr,其顺序与各稀土元素在稀土微肥中含量大小的顺序相同.表明外源稀土的迁移性与外源稀土的总量密切相关.外源稀土在土柱中的含量随着红壤深度的增加而减少,稀土元素主要在土柱中第一、二层持留;随着淋溶液酸度的下降,稀土元素向下迁移的能力增加.The effects of simulated rain and acid rain on the transport of rare earth elements (REEs) in soil columns were investigated. The results showed that the leaching potential of REEs increased with decreasing pH of rain in the unpolluted soil column. The REEs could be listed by their amount of transportation in column was Ce > La > Nd > Pr, correlated with the order of REEs in the REEs micro-fertilizers. The amount of REEs decreased and leaching potential increased with decreasing pH of acid rain in the polluted soil column.

关 键 词：元素迁移 土柱 模拟酸雨 稀土元素 外源稀土 溶液PH值 模拟研究 稀土微肥 溶液酸度 顺序 迁移量 迁移性 红壤 能力 含量 淋溶 

分 类 号：X144[环境科学与工程—环境科学]