酸化天然地表水体中铝形态分布的化学平衡计算

CHEMICAL EQUILIBRIUM CALCULATION OF ALUMINUM SPECIATION IN ACIDIFIED SURFACE WATERS

报导了酸化天然地表水体中铝形态的化学平衡模式计算。建立了适用于两种不同情况下水中铝形态分布的计算模型，获得了有价值的结论。

A simple computer model based on chemical equilibrium calculation for evaluating the aluminum speciation in surface waters of low ionic strength (Ⅰ<1×10 -4 M) was presented in this paper.Two cases were discussed.In case Ⅰ,the aluminum is in equilibrium with the solid phase Al(OH) 3 and in case Ⅱ the aluminum speciation depends on its total concentration C * Al where Al 3+ is not in equilibrium with any form of solid phase.Although chemical equilibrium calcuation can only provide a gross picture of aluminum speciation in surface waters because the natural waters are very complicated,it can still offer a way to allow a general characterization of the chemical speciation.All of this should prove to be a useful guide for assessing the actural speciation of aluminum for field condition with the merit of simplicity.