کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1738301 1521617 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An investigation into the adsorption of thorium(IV) from aqueous solutions by a carboxylate-functionalised graft copolymer derived from titanium dioxide-densified cellulose
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
An investigation into the adsorption of thorium(IV) from aqueous solutions by a carboxylate-functionalised graft copolymer derived from titanium dioxide-densified cellulose
چکیده انگلیسی

The use of a carboxylate-functionalized graft copolymer (PGTDC-COOH) based on titanium dioxide-densified cellulose (TDC) for the removal and recovery of thorium(IV) [Th(IV)] from industrial wastewater is reported in this paper. Infrared spectroscopy and X-ray diffractometer were used to characterize the adsorbent material. Batch equilibrium experiments showed that the adsorbent exhibited 98.6 ± 3.1% adsorption from an initial concentration of 10 mg/L Th(IV) solution at pH 5.0. The sorption kinetics have been analysed by pseudo-first-order and pseudo-second-order kinetic models and the adsorption kinetics was described by pseudo-second-order model. The experimental data obeyed Langmuir isotherm and the maximum monolayer adsorption capacity for Th(IV) was also found to be 92.23 ± 2.4 mg/g at 30 °C. The desorption capacity of HCl concentrations of different strengths ranging from 0.001 to 0.1 M was also studied. Maximum desorption of 98.2 ± 2.8% for Th(IV) occurred with 0.1 M HCl. The adsorption efficiency towards Th(IV) ion removal was tested using artificial sea water. Almost complete removal was possible with 3.5 g of the adsorbent from 1 L of the sea water.


► Graft copolymer of titanium dioxide-densified cellulose is used as adsorbent.
► Batch equilibrium experiments were carried out.
► Monolayer adsorption capacity for Th(IV) was found to be 92.23 ± 2.4 mg/g at 30 °C.
► Effect of ionic strength showed cation exchange mechanism.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Radioactivity - Volume 116, February 2013, Pages 141–147
نویسندگان
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