【摘要】 本实验研究了腐殖酸 (HumicAcid ,又名胡敏酸 )对外源稀土元素在土壤中形态分布的影响和各形态的有效性。结果发现 ,加入腐殖酸后 ,土壤中稀土的交换态和碳酸盐结合态含量降低 ,有机结合态含量上升 ,而且腐殖酸浓度与稀土有机结合态含量有良好的相关性 ,说明腐殖酸能够提高稀土元素在土壤中的固定性 ,减少有效态稀土含量更多还原

【Abstract】 In this experiment, the effects of Humic Acid (HA) on the distributing and validity of external Rare Earth Elements (REEs) in the red soil were investigated. The results showed that after the HA adding to the soil, the exchangeable fraction and binding to carbonate fraction of REEs reduced, while the binding to organic matter fraction of REEs increased. The close relation of the concentration of HA with the binging to organic matter fraction of REEs was found. The results showed that HA could increase the fixity of external REEs, and it also could decrease the valid fractions of REEs in the soil.更多还原