摘要
饱和指数SI是反映水环境中矿物溶解—沉淀状态的重要参数,而水溶液中络合物的存在对SI值有很大的影响。但从微观角度而言,络合物的形成满足一定的络合平衡条件,因此正确计算络合物的含量,可提高水—岩作用SI模型的计算精度。依据化学热力学的基本理论,作者编写了计算SI值的Fortran程序,选用离子强度作为控制变量描述络合物对SI值的影响程度,结合某工程实例,证明该模型具有很好的稳定性和计算精度。
Saturation index （SI） is an important parameter to describe mineral dissolve-precipitateing state in water environment, while complex has significant influence on SI value in water solution. But from microscopic view, the formation of complex must obey some complex equilibrium conditions; it will improve the calculation accuracy of SI model on water-rock interaction by calculating the content of complex correctly. According to the basic theory of chemical thermodynamics, Fortran program is designed to calculate SI value, and ion strength is chosen as the control variable to describe the influence degree of complex on SI value. Through an engineering case, it proves that the model has better stability and calculation precision.
出处
《勘察科学技术》
2008年第3期23-26,共4页
Site Investigation Science and Technology
关键词
地下水
络合物
饱和指数
水-岩作用模拟
groundwater
complex
saturation index
water-rock interaction simulation
