Enhancing the adsorption function of F⁻ by iron and zirconium doped zeolite: Characterization and parameter optimization

Bo Yang; Chaomin Jia; Guirong Sun; Bingxu Quan; Chunhui Zhang; Qianqian Huo; Peidong Su

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자료유형: 학술저널

저자정보: Bo Yang (China University of Mining and Technology-Beijing) Chaomin Jia (China University of Mining and Technology-Beijing) Guirong Sun (China University of Mining and Technology-Beijing) Bingxu Quan (China University of Mining and Technology-Beijing) Chunhui Zhang (China University of Mining and Technology-Beijing) Qianqian Huo (China University of Mining and Technology-Beijing) Peidong Su (Chinese Academy of Sciences)

저널정보: 대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제28권 제2호

발행연도: 2023.4

수록면: 213 - 224 (12page)

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This study presented an original study on the F⁻ removal by Fe and Zr doped Gismondine-dominated Zeolite. Various modified zeolites are prepared by systematically adjusting the synthesis variables, namely pH, mass ratio of zeolite to modify agent (mZeolite:m(Fe+Zr)), mass ratio of Fe to Zr (Fe:Zr) to investigate their effects on the F⁻ adsorption. The performance of prepared Fe-Zr-Zeolite on F⁻ removal was examined through both statistic adsorption and dynamic adsorption. Results indicated that when the modified pH was 7, the Fe:Zr ratio was 1:1 and mZeolite:m(Fe+Zr) was 1:2, the modified natural zeolites which was named Fe-Zr-Zeolite showed the best removal efficiency on F⁻. Fe-Zr-Zeolite could remove over 80% when the initial concentration was less than 20 mg/L and F⁻ adsorption followed pseudo-second-order adsorption kinetic and Langmuir adsorption isotherm, indicating that F⁻ adsorption by Fe-Zr-Zeolite was chemically dominated. Besides, Fe-Zr-Zeolite had better removal efficiency of F⁻ under acidic conditions than that under alkaline conditions, and the competing anions, typically, Cl-, NO₃⁻ and SO₄2- had negligible effect on F⁻ removal by Fe-Zr-Zeolite. The dynamic adsorption test demonstrated that in order to maintain the high removal efficiency of F⁻, the filling thickness of Fe-Zr-Zeolite should be at least 30 ㎝ and the small the flow rate is, the higher the F⁻ removal efficiency will be.

#Adsorption #Defluoridation #F⁻ pollution #Zeolite #Zirconium

참고문헌 (56)

참고문헌 신청

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