海砂氯离子溶出机制和模型研究

为研究海砂淡化过程中氯离子的溶出机制，采用海砂淡化试验分析不同淡化方法下溶出氯离子量与淡化时间、水砂质量比的关系；在此基础上，考虑海砂氯离子分布及溶出特征，以Fick定律推导的溶解扩散理论为基础，建立同时考虑海砂表面氯离子溶解和内部氯离子释放的溶出模型，并对模型进行了验证。结果表明：海砂氯离子溶出模型可以较好地描述海砂氯离子的溶出过程，能够反应淡化时间和水砂质量比对海砂淡化效果的影响。

Investigation on mechanism and model of chloride dissolution from sea sand

In order to investigate the dissolution mechanism of chloride in the desalination process of sea sand, desalination experiments were conducted by different methods to analyze the relationships of the amount of dissolved chloride with time and water-sand mass ratio. Based on the distribution and dissolution characteristics of chloride in sea sand, a chloride dissolution model considering both the surface chloride solution and the internal chloride dissolution was developed, from the dissolution and diffusion theory derived from the Fick''s law. The results of model validations show that this model can well describe the chloride dissolution process and reflect the influences of time and water-sand mass ratio on the desalination effect of sea sand.