Kinetics of Chromium Ion Removal from Tannery Wastes Using Amberlite IRA-400 Cl- and its Hybrids
Kinetics of Chromium Ion Removal from Tannery Wastes Using Amberlite IRA-400 Cl- and its Hybrids
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DOI：
10.1007/s11270-009-0221-7
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发表时间：
2010-07-01
影响因子：
2.9
通讯作者：
Waseem, Muhammad
中科院分区：
文献类型：
--
作者：
Mustafa, Syed;Ahmad, Tauqeer;Waseem, Muhammad
采用强碱阴离子交换树脂Amberlite IRA-400 Cl-及其与Mn(OH)(2)和Cu(OH)(2)的杂合物，对合成革废浴液中的铬进行了脱除。通过改变实验条件，即树脂用量、搅拌速度和温度来检查回收率。当树脂用量从0.2 g增加到1.0 g时，Amberlite IRA-400 Cl-对铬的去除率提高了近4倍。此外，当搅拌速度从100转/分增加到1000转/分时，铬的吸附速率几乎增加了一倍，表明吸附是一个扩散控制的过程。随着温度的升高，除铬能力也有所提高，显示出该工艺的吸热性质。利用膜扩散、粒子扩散和拉格伦准一级动力学模型对结果进行了解释。将Amberlite IRA-400 Cl-的动力学结果与其杂化阴离子交换树脂IRA-400 Mn(OH)(2)和IRA-400 Cu(OH)(2)进行了比较。研究发现，与母体交换剂相比，杂化离子交换剂具有更强的去除能力和更快的动力学。
A strong base anion exchange resin Amberlite IRA-400 Cl- and its hybrids with Mn(OH)(2) and Cu(OH)(2) are used for the removal of chromium from the synthetic spent tannery bath. The recovery is examined by varying the experimental conditions, viz., resin dosage, stirring speed, and temperature. The rate of chromium removal by Amberlite IRA-400 Cl- increased almost four times when the resin dosage was increased from 0.2 to 1.0 g. Furthermore, the rate of chromium sorption almost doubled when the stirring speed was increased from 100 to 1,000 rpm, suggesting that the sorption is a diffusionally controlled process. The chromium removal capacity also increased with the rise of temperature, showing the endothermic nature of the process. The results are explained with the help of film diffusion, particle diffusion, and Lagergren pseudo-first-order kinetic models. The kinetics results of the Amberlite IRA-400 Cl- are compared with its hybrid anion exchange resins IRA-400 Mn(OH)(2) and IRA-400 Cu(OH)(2). It is found that the hybrid ion exchangers have greater removal ability and fast kinetics as compared to the parent exchanger.