与高岭石固相平衡的酸性天然地表水中铝形态分布的计算机模拟     

刘锋  毕树平  汤伟 《湖泊科学》2000,12(4):311-320

基于热力学平衡计算,用计算机模拟研究了与高岭石固相平衡的酸性天然地表水中铝的形态分布,讨论了影响铝莆态分布的各种因素,同三水铝石固相平衡相比,与高岭石固相平衡的酸性天然地表水中,铝的形态分布与溶解硅酸的浓度密度相关,聚合态铝浓度较低,总溶解铝浓度明湿减小约２个数量级,模型被用于实际水样的分析,所得结果与实验值符合较好,最后用Ｍｏｎｔｅ Ｃａｒｌｏ模拟考察了由于平衡常数的选择而带来的不确定性。  相似文献   

与高岭石固相平衡的酸性天然地表水中铝的缓冲作用的计算机模拟     

刘锋  毕树平 《湖泊科学》2000,12(3):233-239

基于质量守恒以及电中性条件,采用化学平衡计算法,计算模拟研究了高岭石固相平衡的酸性天然地表水中铝的缓冲作用对ｐＨ值,酸中和容量ＡＮＣ和缓冲强度β的影响,讨论了影响酸性地表水ｐＨ估算的各种因素,如溶解硅酸的浓度,溶解总无机碳的浓度,溶解总氟和总有机碳的浓度及温度等。模型被用于实际水样的分析,所得结果与实验值符合较好,用ＭｏｎｔｅＣａｒｌｏ模拟考察了由于平衡常数的选择以及水化学参数测量误差而带来的不确  相似文献   

美国罗德河流域地下水中铝形成动力学     

毕树平  David L. Correll 《湖泊科学》1998,10(S1):309-314

In the Rhode River estuarine/watershed area, increased acidity of precipitation from atmospheric acidic deposition has deleterious effects on the freshwater ecosystems. One of the characteristics of an acidic watershed is the mobilization of aluminum from soils to aquatic environment. Increased concentrations of aluminum in surface waters are toxic to living organisms. Detection of long-term changes of acidity and elevated Al concentrations in surface and soil waters is a central issue. In this present paper, the dynamics ofAl speciation in the shallow ground waters from Rhode River watershed 110 (la) were investigated. This research provides a unique, regional analysis of important controls on the transport of Al speciation through the rural watershed of the Chesapeake Bay.  相似文献   

用DASA溶出安伏法确定淡水中的铝离子浓度     

毕树平 《湖泊科学》1998,10(S1):579-583

Application of the adsorptive stripping voltammetry using DAS A (1, 2-dihydroxy an-thraquinoine-3-sulfonic acid) in the buffer solution of triethanolamine (pH 7.6) to determine the ionic forms of aluminum in fresh waters were presented in this paper. No serious interferences from Zn, Fe, Cl and V were found. Small amounts of Ca enhanced the analytical signal. Electroactive or ionic aluminum concentrations in fresh waters sampled both from China and USA was analysed.  相似文献