Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pb2+ adsorption on TiO2@HF‐waste building bricks: Kinetics, thermodynamics, and mechanisms
Pb2+ pollution poses severe threats to human health and ecosystem. In this study, based on the waste building bricks (WBB), the TiO2@HF‐WBB was prepared for Pb2+ adsorption removal from wastewater. The adsorption of Pb2+ on TiO2@HF‐WBB followed the pseudo‐second‐order kinetics and the Freundlich isotherm model. The thermodynamic parameters indicated that the adsorption process was endothermic, spontaneous, and irreversible, and also included physical adsorption and chemical adsorption simultaneously. Ca2+ and Mg2+ had little effect on Pb2+ adsorption. The effluent of fixed‐bed was below 3 μg/L within 1,000 BV. The desorption rate could reach 90% by simple operation. The possible mechanisms included the electrostatic interaction and the complexation. Waste building bricks were utilized for Pb2+ removal from wastewater. The effluent of fixed‐bed was below 3 μg/L within 1,000 BV. TiO2@HF‐WBB has excellent adsorption property and desorption property. Possible mechanisms are electrostatic interaction and the complexation.
Pb2+ adsorption on TiO2@HF‐waste building bricks: Kinetics, thermodynamics, and mechanisms
Pb2+ pollution poses severe threats to human health and ecosystem. In this study, based on the waste building bricks (WBB), the TiO2@HF‐WBB was prepared for Pb2+ adsorption removal from wastewater. The adsorption of Pb2+ on TiO2@HF‐WBB followed the pseudo‐second‐order kinetics and the Freundlich isotherm model. The thermodynamic parameters indicated that the adsorption process was endothermic, spontaneous, and irreversible, and also included physical adsorption and chemical adsorption simultaneously. Ca2+ and Mg2+ had little effect on Pb2+ adsorption. The effluent of fixed‐bed was below 3 μg/L within 1,000 BV. The desorption rate could reach 90% by simple operation. The possible mechanisms included the electrostatic interaction and the complexation. Waste building bricks were utilized for Pb2+ removal from wastewater. The effluent of fixed‐bed was below 3 μg/L within 1,000 BV. TiO2@HF‐WBB has excellent adsorption property and desorption property. Possible mechanisms are electrostatic interaction and the complexation.
Pb2+ adsorption on TiO2@HF‐waste building bricks: Kinetics, thermodynamics, and mechanisms
Shi, Jing (Autor:in) / Xing, Chao (Autor:in) / Chen, Yating (Autor:in) / Xu, Zhengwen (Autor:in) / Du, Qiong (Autor:in) / Cui, Yixin (Autor:in)
Water Environment Research ; 91 ; 788-796
01.08.2019
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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