• 关键词：酸雨  稀土元素  环境化学行为  植物可利用性

• 基金项目：国家自然科学基金

• 陈照喜
• 华东冶金学院化工系,马鞍山 243002

• 王晓蓉
• 南京大学环科系

• 田笠卿
• 南京大学环科系

• 戴乐美
• 南京大学环科系

• 摘要：研究了模拟酸雨对两种土壤中稀土元素的环境化学行为和植物可利用性的影响。结果表明,酸雨的酸度及淋洗量皆对稀土元素的淋溶产生影响,酸雨淋洗使土壤中稀土元素的形态含量发生了改变。由回归分析得知,有效态稀土的主要存在形态是交换态和松结有机态,实验表明,稀土的植物可利用性随模拟酸雨淋洗液的酸度增大而减小。

• Abstract：The effects of simulated acid precpitation on the environmental chemical behavior andplant utility of rare earth elements(REEs)are studied.The results show that the acidityand volume of acid precipitation affect apparently on the process of the leaching of REEs;the acid precipitation changes the amounts of various forms of REEs.Optimum regressionanalysis predicts that the main source of available REEs is exchangeable REEs and REEsweakly bound to organic matter.This study also finds that the amounts of REEs in plantsdecrease with increase of acidity in simulated acid precipitation.

• Key words：acid precipitation  rare earth elements  environmental chemical behavior  plant utility

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