摘要
利用ＣａＣＯ３－ＣＯ２－酸雨系统的平衡态及未平衡态的水化学模型计算出各种ｐＨ值的酸雨与灰岩反应过程中Ｃａ２＋的浓度与溶液中ｐＨ值之间的变化关系，以此来反映灰岩被酸雨的侵蚀过程。ｐＨ＜３０的酸雨对灰岩的侵蚀量多半是在初始阶段（反应起点至ｐＨ＝３０时刻）发生的，因此ｐＨ＜３０的酸雨对灰岩的溶蚀不仅量大而且速度较快，其余酸度的酸雨与灰岩的反应在中间阶段（ｐＨ＝４０～７，０）都很缓慢，灰岩被侵蚀量很小，而在反应后期阶段灰岩被溶蚀的量又有所提高。
The relationship between Ca2+ concentration and pH in the process is calculated in the CaCO3-acid rain-CO2 equlibrium state and in its unequilibrium state The curve of the relationship is regarded as an erosion process The result of modelling indicates that the erosion of acid rain (pH<30) in the early period is majority of the total That′s to say, the erosion of limestone by the acid rain whose pH<30 is rapid and the equantity is substantial In the middle period (pH=40～70), the velocity of the erosion is very low In the last period (from pH=70 to equilibrium), the erosion goes up again this contributes to the entering of CO2 gas from atmosphere
出处
《桂林工学院学报》
1997年第4期372-379,共8页
Journal of Guilin University of Technology
基金
国家自然科学基金
关键词
酸雨
灰岩
侵蚀过程
模拟计算
岩溶侵蚀
acid rain
limestone
erosion
equilibrium state
unequilibrium state
modelling
calculation
