Simultaneous Multifunctional Sorption of PFOS and Cr(VI) on Activated Carbon Prepared by One-Step Microwave Activation

摘要: Multifunctional sorbents, activated carbons (AC), were prepared by one-step microwave activation utilizing peanut shells and sunflower seed husks. The influence of the original particle size raw materials on yield specific surface area AC was studied, which reached 33.5 % 1133.27 m(2)/g, respectively. repetitive competitive uptakes perfluorooctane sulfonate (PFOS) chromium applied to investigate sorption properties AC. mechanisms demonstrated using sulfur Kedge X-ray absorption near edge structure analysis (XANES). In experiment, made from (AC(P05)) still retained 70 removal efficiency PFOS after fourth because sorbed might form a new organic phase that supplied effective sites for hydrophobic partition PFOS. However, Cr(VI) decreased dramatically 60 11 uptake electrostatic attraction its only pathway. binary solutes system, AC(P05) possessed perfect performance both Cr(VI), 885 192 mg/g, multivariate XANES spectra indicated thiol functional group existed in resulting metal chelate formed between Zn2+/Cu2+. Hence, presence Zn2+/Cu2+ further promoted through anions positive chelate.