The hydroxyapatite-loaded swine manure derived-biocarbon was successfully prepared by pyrolysis method for the adsorption of uranium(Ⅵ).The results of the adsorption experiments displayed that the adsorption behavior...The hydroxyapatite-loaded swine manure derived-biocarbon was successfully prepared by pyrolysis method for the adsorption of uranium(Ⅵ).The results of the adsorption experiments displayed that the adsorption behaviors for uranium(Ⅵ)of biocarbon did almost not depend on the interfering ions except Al^(3+),Ca^(2+)and CO_(3)^(2−),showing the high selectivity of the composites for uranium(Ⅵ).The maximum static and dynamic removal capacity of the hydroxyapatite-biocarbon composites to uranium(Ⅵ)were 834.8 and 782.8 mg/g(pH=3,m/V=0.1 g/L and T=298 K),far exceeding other reported biocarbon and hydroxyapatite materials,which indicated that the hydroxyapatite-biocarbon composites possessed an application potential in adsorption.After five cycles of adsorption-desorption processes,the removal efficiency of the hydroxyapatite-biocarbon composite for uranium(Ⅵ)was 93.2%(C_(i)=5 mg/L,pH=3,m/V=0.1 g/L and T=298 K),revealing that the composite had excellent stability and reusability.Moreover,the capture mechanisms of the hydroxyapatite-biocarbon composite for uranium(Ⅵ)included ion exchange and complexation,which was ascribed to the ample active adsorption sites(-OH and PO_(4)^(3−)).Therefore,the hydroxyapatite-loaded swine manure derived-biocarbon would be a potential material to effectually separate uranium(Ⅵ)from solution.展开更多
基金the National Natural Science Foundation of China(No.21902130 and 21976147)Sichuan Science and Technology Program(No.2020JDJQ0009,2020ZDZX0012,2020JDRC0099,2020YFG0467 and 2020YFS0345)+3 种基金the Career Development Funding of CAEP(2402001)the Presidential Funding of CAEP(YZJJLX2019007)Research Fund of SWUST for Ph.D.(No.19zx7129,18zx7149 and 17zx7135)Sichuan’s Training Program of Innovation and Entrepreneurship for Undergraduate(No.S202110619086 and S202110619061).
文摘The hydroxyapatite-loaded swine manure derived-biocarbon was successfully prepared by pyrolysis method for the adsorption of uranium(Ⅵ).The results of the adsorption experiments displayed that the adsorption behaviors for uranium(Ⅵ)of biocarbon did almost not depend on the interfering ions except Al^(3+),Ca^(2+)and CO_(3)^(2−),showing the high selectivity of the composites for uranium(Ⅵ).The maximum static and dynamic removal capacity of the hydroxyapatite-biocarbon composites to uranium(Ⅵ)were 834.8 and 782.8 mg/g(pH=3,m/V=0.1 g/L and T=298 K),far exceeding other reported biocarbon and hydroxyapatite materials,which indicated that the hydroxyapatite-biocarbon composites possessed an application potential in adsorption.After five cycles of adsorption-desorption processes,the removal efficiency of the hydroxyapatite-biocarbon composite for uranium(Ⅵ)was 93.2%(C_(i)=5 mg/L,pH=3,m/V=0.1 g/L and T=298 K),revealing that the composite had excellent stability and reusability.Moreover,the capture mechanisms of the hydroxyapatite-biocarbon composite for uranium(Ⅵ)included ion exchange and complexation,which was ascribed to the ample active adsorption sites(-OH and PO_(4)^(3−)).Therefore,the hydroxyapatite-loaded swine manure derived-biocarbon would be a potential material to effectually separate uranium(Ⅵ)from solution.
