Sulfonated polystyrene waste in liquid phase as on-exchange material to remove Cr (III) in aqueous solution

4th International Forum on Sustainable Future in Asia / 4th NIES International Forum

生态环境科学

Nguyen, C.^1 ; Nguyen, P.^1 ; Pham, G.^1 ; Nguyen, K.^1 ; Pham, T.^1

Faculty of Environment, VNU University of Science, Hanoi, Viet Nam^1

关键词: Analysis techniques;    Experimental conditions;    Fourier transform infra reds;    Ion-exchange columns;    Polystyrene waste;    Reaction conversion;    Sulfonated polystyrene;    Waste polystyrene;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/266/1/012005/pdf
DOI  :  10.1088/1755-1315/266/1/012005

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Polystyrene waste from disposal products has been sulfonated in a homogeneous phase by using sulfur acid and cyclohexane to synthesize cation exchange material, which could be used to uptake Cr(III) from aqueous solution. In this study, by analysis techniques such as SEM (Scanning Electron Microscope) and FITR (Fourier transform infrared), the surface area of material groups is revealed that they are larger than raw materials to increase point of contact with Cr(III). Moreover, it is proven that the additional sulfonic groups were presented. The results pointed out that the dependence of ion exchange column operation on many factors (size, reaction time, flow rate,...) exert an influence on the efficiency of Cr(III) ion treatment. In addition, experimental conditions which affect the sulfonation conversion, have been investigated such as temperature, modification time, H2SO4 concentration,... It was found that reducing the Cr(III)concentration by 87.51% and 98.72% for 10 cm and 15cm ion-exchange height layer after 3 hours operation in the reaction conversion using the column 8mm diameter, flow rate 2.00ml per minute with shaking speed 220 rpm. The experimental data were consistent with Thomas and Yoon-Nelson kinetic models. The ability of sulfonated waste polystyrene to uptake chromium ion from aqueous water has been evaluated significantly.