钠基凹凸棒土对模拟废水中重金属Co（II）离子的吸附研究

doi:10.19286/j.cnki.cci.2018.09.042

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Abstract

The sorption effect of Na-attapulgite on heavy metal ion of Co(II) was studied. The experimental factors such as contact time, solid content, pH value, ionic strength, foreign ions, FA and temperature on the adsorption ratio were investigated. The results indicate that the sorption of Na-attapulgite on Co(II) ions achieves equilibration rapidly and can be described well by pseudo-second-order model. pH and ionic strength are the main impact factors and the sorption effect of Na-attapulgite on Co(II) ions is mainly dominated by ion exchange and/or outer-sphere surface complexation. The thermodynamic parameters (△G°, △S°, △H°) calculated from the temperature-dependent sorption isotherms indicated that the sorption of Na-attapulgite on Co(II) is an endothermic and spontaneous process and Langmuir model simulated the experimental data very well.

Key words： Na- attapulgite heavy metal ion sorption thermodynamics kinetics wastewater

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Zhang Wanxu. Study on the sorption effect of Na-attapulgite on heavy metal ion of Co（II） in simulated wastewater[J]. CCI, 2018, 41(9): 148-154.

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http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2018.09.042 OR http://www.mtyhg.com.cn/EN/Y2018/V41/I9/148

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