【摘要】 由于地下水污染的加剧,对地下水中污染物运移规律的研究日益受到重视。地下水中的溶质在运移过程中伴随着溶质组分间的化学反应,因此需要建立地下水溶质运移与化学反应的耦合模型。PHREEQC是近年来发展起来的描述局部平衡反应、动态生物化学反应的水文地球化学模拟软件。本文利用该模拟软件对一维地下水流动过程中溶质离子交换反应和动态氧化还原反应进行了模拟。结果表明,PHREEQC能够成功地进行溶质运移情况下复杂水化学反应模拟,但对于复杂地下水流和溶质运动的情况,有必要耦合其它的地下水流动和溶质运移软件来共同完成。更多还原

【Abstract】 With the increase of groundwater contamination, the study of contaminant transfer is becoming more and more important. Since chemical reaction occurs simultaneously with contaminant transfer, these two aspects should be coupled in one model. PHREEQC is a simulation software for chemical reactive transport processes in natural or underground water. PHREEQC was applied to simulate the processes of cation exchange and kinetic redox with 1-D groundwater flow. The results show that PHREEQC can successfully simulate those complex geochemical reactions occurred under simple chemical transport condition. However, to the multi-dimensional groundwater flow and contaminant transport, it’s necessary to couple PHREEQC with other groundwater flow and species transport models.更多还原