The effects of adsorption time, amount of adsorbent, vibration rate, pH value and adsorption equilibrium were studied through the test of the adsorption of Cd2+ ions in waters with palygorskite based on purification of Jingyuan palygorsk ite clay at the normal temperature, and the kinetics process and adsorption equilibrium were discussed. The XRD and IR analysis results indicate that quartz is separated from the original mineral obviously with the purification. The equilibrium can be reached in about 60 minutes. The effect of pH value on adsorption is evident, the adsorption amount increases with the rise of pH value, and the disposal rate can exceed 99% when pH>8. The adsorption process is on the whole identical with pseudo-second-order Lagergren model, the adsorption of Cd2+ on palygorskite is fitted to both Langmuir and Freundlich models, and the saturated adsorption capacity calculated from the Langmuir isotherm is 31.65 mg/g.
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郝艳玲,范福海,2008,Cd2+在甘肃靖远坡缕石粘土上的吸附作用研究[J].岩石矿物学杂志,27(6):567~571. HAO Yan-ling, FAN Fu-hai,2008,Adsorption of cadmium ions from aqueous solution on palygorskite clay from Jingyuan, Gansu Province[J]. Acta Petrologica et Mineralogica,27(6):567~571.