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膨润土对重金属离子的吸附动力学 总被引:11,自引:0,他引:11
研究了膨润矿对溶液中重金属离子Cu^2+的吸附动力学,实验结果表明:(1)膨润土对Cu^2+离子的吸附过程可分为三个阶段,初始阶段(t≤3min)满足于方程为dC/dt=-A.e^-mt,中期阶段(3min≥t〈10min)是从初始阶段到后期阶段的过渡阶段,后期阶段(t≥10min)满足于方程dC/dt=-k.C。(2)吸附速度常数随吸附温度的提高而增加,且与温度T之间的关系符合Arrhenius 相似文献
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Using the calculation of thermodynamicequilibria in multicomponent systems,two ternaryphase diagrams,Ni-Cr-Mo and Ni-Cr-Co,havebeen calculated by optimizing the Gibbs free ener-gies with respect to phase diagrams andthermodynamic data.On the basis of this calcula-tion,the occurrence of σ-phase in the residual solidsolution of commercial Ni-base superalloys,IN-713C and U-700,has been predicted.The re-sults show that the calculation of phase equilibria issuccessful in the prediction of the occurrence of theσ-phase. 相似文献
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