Acid mine drainage is an important environmental hazard due to its serious chemical contamination to the surface and groundwater resources. To provide enough and representative data for developing restoration techniques, this time-dependent geochemical process should be investigated based on kinetic principles. Thus, the kinetic column test generally utilized in the earlier studies without any accepted procedures related to the column dimension and properties of materials such as particle size and mass of samples to be tested for this purpose. To overcome the dissimilarities between the mass release rate of contaminants specified in the laboratory and in the field, and to upscale laboratory-based measurements to the field, kinetic column tests were performed by using different columns filled with crushed coarse and fine ore samples. The fluctuations of pH values and the concentration of various constituents were determined during kinetic column tests. The effluents of columns turned to acid after a lag time of between 21 and 65 weeks depending on the column dimensions and particle size. Statistically significant predictive models for upscaling geochemical behaviour of AMD processes were presented based on simple and multiple regression analyses among column dimensions and main parameters controlling the rate of acid generation.

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动力学程序和经验模型对酸性矿山排水的评价

酸性矿山的排水由于其对地表和地下水资源的严重化学污染，因此是一种重要的环境危害。为了为开发修复技术提供足够的代表性数据，应根据动力学原理研究这种随时间变化的地球化学过程。因此，动力学色谱柱试验通常用于较早的研究中，而没有任何可接受的与色谱柱尺寸和材料特性（例如粒度和待测样品质量）相关的程序。为了克服实验室和现场指定的污染物的质量释放速率之间的差异，以及为了对基于现场的实验室进行高级测量，使用填充有粗碎和细矿石样品的不同色谱柱进行了动力学色谱柱测试。在动力学柱测试过程中确定pH值的波动和各种成分的浓度。在21到65周之间的滞后时间后，取决于色谱柱的尺寸和粒径，色谱柱的流出物变为酸。基于柱尺寸和控制酸生成速率的主要参数之间的简单和多重回归分析，提出了用于提升AMD工艺地球化学行为的具有统计学意义的预测模型。