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基于热力学平衡计算,用计算机模拟研究了与Jurbanite固相平衡的酸性天然地表水中各种无机铝形态、有机铝形态、聚合铝形态随水溶液pH变化的关系,用文献提供的实际水样数据作为输入数据,比较了与酸性天然地表水中可能存在的固相矿物如Jurbanite,basaluminite,alunite和gibbsite相平衡的几种土壤溶液中的铝形态变化规律,重点放在易受酸沉降影响的Jur- banite上。在矿相Jurbanite存在的条件下,由模型预知,SO4 2-对铝的形态分布和总铝浓度有显著影响,而在所研究的pH范围内有机铝络合物和氟络合物的浓度相对较小。模型同时被用于文献中与Jurbanite固相平衡的土壤溶液中铝形态的计算,预测其浓度大小依次为总可溶性铝、无机铝和有机铝。然而,模型结果表明,Jurbanite受酸沉降影响溶解之后将显著地影响土壤溶液Al化学。
Based on the thermodynamic equilibrium calculation, the relationships between the morphology of inorganic aluminum, the morphology of organic aluminum and the pH of aqueous solution of acidic natural surface water which is in solid phase equilibrium with Jurbanite were studied by computer simulation. The actual water sample data provided in the literature were used as input Data comparing the aluminum speciation in several soil solutions that balances the possible presence of solid-phase minerals such as Jurbanite, basaluminite, alunite and gibbsite in acidic, natural surface waters, with an emphasis on Jur-banite susceptible to acid deposition . In the presence of the mineral phase Jurbanite, it was predicted by the model that SO 4 2- had a significant effect on the morphological distribution of aluminum and the total aluminum concentration, whereas the concentration of organoaluminum complex and fluorine complex in the studied pH range was relatively Smaller. The model was also used to calculate the aluminum speciation in the soil solution which is in equilibrium with Jurbanite in the literature. The concentrations of total aluminum, inorganic aluminum and organoaluminum are predicted in turn. However, the model results show that Jurbanite will significantly affect Al solution in soil solution after being dissolved by acid deposition.