马兰黄土与Cr(Ⅲ)水岩相互作用模型的建立与验证

Establishment and validation of the water-rock intereaction modelling between the Malan loess and Cr(Ⅲ)

摘要: 使用SEM、EDS、IR、XRD等仪器,分析了马兰黄土的物化组成、表面结构及表面位浓度和阳离子交换容量等特征,并利用这些数据建立了马兰黄土-Cr(Ⅲ)的水岩相互作用模型及变初始浓度、去碳酸岩盐以及形态提取实验。通过对比模拟结果与实验结果,验证模型的可靠性,并初步获取了马兰黄土与水溶液中Cr(Ⅲ)作用过程中所发生的相关反应及其强度。结果显示,在实验浓度(1～100mg/L)范围内,该模型能够很好地描述马兰黄土与水中Cr(Ⅲ)的反应过程,其模型精度达90%。本成果将进一步丰富马兰黄土与Cr(Ⅲ)水岩相互作用的机理研究。

Abstract: The results of column experiment and batch experiment show that the removal rate of Cr(Ⅲ) by the Malan loess could reach 95%.The surface characteristics of the Malan loess such as physico-chemical properties,surface structure,concentration of surface site,cation exchange capacity were analyzed with some advanced equipments,for example,SEM,EDS,IR,XRD,etc and the water-rock interaction modeling between the Malan loess and Cr(Ⅲ) was built.The different initial concentration experiment,non-calcites ...