Synthesis, characterization and trivalent arsenic sorption potential of Ce-Al nanostructured mixed oxide

International Symposium on Current Progress in Functional Materials

Bhattacharya, S.^1 ; Gupta, K.^2 ; Ghosh, U.C.^2

School of Ecology and Environment Studies, Nalanda University, Rajgir, Bihar, India^1

Department of Chemistry, Presidency University, Kolkata, India^2

关键词: Arsenic contamination;    Batch sorption method;    Contaminated water;    Equilibrium sorption;    Freundlich isotherm;    Health consequences;    Sorption behaviors;    Surface sorptions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/188/1/012003/pdf
DOI  :  10.1088/1757-899X/188/1/012003

来源: IOP

【 摘 要 】

Arsenic contamination in the ground water has serious health consequences in many parts of the world. The surface sorption method for arsenic mitigation has been widely investigated due to its simple method, inexpensive operation, highly efficient and low content of by-products. In the present study, nanostructured hydrated cerium aluminum oxide (NHCAO) was synthesized and characterized and its arsenic (III) sorption behavior from the aqueous solution was studied. The material was characterized in SEM, FE-SEM, TEM, AFM, XRD, and FT-IR. Batch method was used for the kinetics of As (III) sorption on nanoparticles at 303 (± 1.6) K and at pH 7.0 (± 0.2). The experiments on isotherm subject were performed individually at 288K, 303K, 318K temperatures at pH 7.0 (± 0.2) using the batch sorption method. In the kinetics study of arsenic (III) sorption, the sorption percentage was observed to remain nearly unchanged up to pH 9.0, thereafter only slight reduction in sorption percentage. The equilibrium sorption results were tested using the models of Langmuir and the Freundlich isotherm. The Langmuir model is the most fitted model for the sorption reaction. NHCAO was highly efficient in As(III) removal out of the water in the extensive range of pH and could be used for arsenic removal from contaminated water.