National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
J Hazard Mater. 2010 Apr 15;176(1-3):186-92. doi: 10.1016/j.jhazmat.2009.11.011. Epub 2009 Nov 10.
The article describes a convenient method for the modification of Amberlite XAD-4 resin by introducing thio-urea binding sites onto the aromatic rings. The modified (ATU) resin has been employed for the quantitative sorption of fluoride ions in batch as well as column experiments. The parameters (i.e. pH, contact time, etc.) were optimized and desorption of fluoride ions was fulfilled by using 0.01 M HCl solution. The equation isotherms such as Langmuir, Freundlich, Dubinin-Radushkevich (D-R) and Temkin were also successfully applied to model the experimental data. The sorption capacity of the ATU resin was found as 3.286 mmol g(-1). From the D-R isotherm parameters, it has been calculated that the uptake of fluoride ion by ATU resin occurs through ion exchange sorption mechanism. The study will contribute toward the remediation of fluoride polluted areas as well as in the various fields of materials science.
本文描述了一种将硫脲结合位点引入芳环上从而对 Amberlite XAD-4 树脂进行修饰的简便方法。改性（ATU）树脂已用于批量和柱实验中氟离子的定量吸附。优化了参数（例如 pH 值、接触时间等），并用 0.01 M HCl 溶液实现了氟离子的解吸。还成功地应用了 Langmuir、Freundlich、Dubinin-Radushkevich（D-R）和 Temkin 等方程等温线来对实验数据进行建模。ATU 树脂的吸附容量为 3.286 mmol g(-1)。从 D-R 等温线参数来看，可以计算出氟离子被 ATU 树脂的摄取是通过离子交换吸附机制发生的。该研究将有助于受氟污染地区的修复以及材料科学的各个领域。
