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首页> 外文期刊>Chemical Science International Journal >Removal of Co2+ and Ni2+ Ions from AqueousSolutions by Low Cost Synthetics Na-4-mica
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Removal of Co2+ and Ni2+ Ions from AqueousSolutions by Low Cost Synthetics Na-4-mica

机译：低成本合成Na-4-云母从水溶液中去除Co2 +和Ni2 +离子

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摘要

A high charged density sodium fluorophlogopite mica Na-4-mica, ideal chemical structure Na4Si_(4)Al_(4)Mg_(6)O_(~(20))F_(4).xH_(2)O, was prepared by a simple and economic method using kaolinite as a source for SiO_(2), Al_(2)O_(3) and MgO. The prepared mica was characterized by using XRD, DSC and SEM. Na-4-mica was used for removal of Co~(2+) and Ni~(+2 )ions from aqueous solutions using a stepwise remediation method. The factors affecting the removal efficiency such as pH change during the exchange reaction, particle size of Na-4-mica, initial metal concentration were investigated. The results showed the removal efficiency increased by decreasing the particle size of the mica and initial concentration of the heavy metal in the solution. Na-4 mica showed removal efficiency for Ni~(2+) ions higher than that for Co~(2+) ions. This related to the difference in the hydrated ions radii between Co~(2+ )and Ni~(2+) ions.
机译：高电荷密度的氟金云母钠云母Na-4-云母，理想的化学结构Na4Si_（4）Al_（4）Mg_（6）O_（〜（20））F_（4）.xH_（2）O使用高岭石作为SiO_（2），Al_（2）O_（3）和MgO的来源的一种简单经济的方法。用XRD，DSC和SEM对制得的云母进行表征。 Na-4-云母采用逐步修复法从水溶液中去除Co〜（2+）和Ni〜（+2）离子。研究了影响交换效率的因素，例如交换反应过程中的pH值变化，Na-4-云母的粒径，初始金属浓度。结果表明，去除效率的提高是通过减小云母的粒径和溶液中重金属的初始浓度来实现的。 Na-4云母对Ni〜（2+）离子的去除效率高于Co〜（2+）离子。这与Co〜（2+）和Ni〜（2+）离子之间的水合离子半径差异有关。

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