0渗滤液初始浓度(CL )是计算填埋场渗漏污染物源强的重要参数之一，由于填埋场构造复杂，其在运行过0程中很难获取，因此在计算填埋场环境风险数学的模型常用浸出浓度（ Ce ）代替CL 。本研究以典型危险废物固化飞灰为代表，开展了优势污染物Cr在不同模拟高度（ h ）土柱和不同浸取剂pH条件下土柱溶出模拟试验研究，通过对比不00同时间段内不同体积浸出液中的总Cr浓度（ CCr0），定义了表征CL 对应的采样体积数，探讨CL 的影响因素中其与h、00pH的相关关系。研究结果表明浸取液的pH在37范围内时CL 没有明显规律性， CL 随h增大而增大，并且根据实验数0据初步建立了CL 和h、pH之间的简单数学关系模型。~%0Initial concentration of landfill leachate (CL ) is one of the key parameters to calculate source intensity of the pollutants leaked from the landfill site, but it is difficult to be obtained during 0the operation of the landfill site which is rather complicated in structure. Therefore, instead of CL , leaching concentration (Ce) is often used in the mathematical models for calculation of environmental risks of landfill site. In this paper, solidified fly ash is taken as a typical representative of hazardous wastes, and a study of experimental simulation of column dissolution of priority pollutant Cr from the solidified fly ash is carried out under the conditions of different column heights and leaching agents with various pH values. By comparison of the total concentration of Cr (CCr0) in the leaching liquid with different volumes 0at different time ranges, sampling volume corresponding to CL characterization is defined and correlation 0 0between CL and column height and pH is researched. The results show that the change of CL in the leaching liquid with pH values from 3 to 7 is not obvious in regularity, while it increases as the column height 0increases. On the basis of the experimental data, a simple mathematical model for relationship between CL and height and pH is preliminarily established.
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