Investigation of performances and mechanism of fluoride removal by Fe (III)-loaded ligand exchange cotton cellulose adsorbent |
| |
Authors: | Zhao Ya-ping Li Xiu-yan Liu Lu Chen Fu-hua |
| |
Affiliation: | (1) College of Environmental Science and Engineering, Nankai University, 300071 Tianjin, China;(2) Department of Environmental Science and Technology, East China Normal University, 200062 Shanghai, China |
| |
Abstract: | Novel adsorbent, Fe(III)-loaded ligand exchange cotton cellulose adsorbent [Fe(III)LECCA], was used to investigate the adsorption performances and mechanism of fluoride removal from aqueous solutions. The adsorbent was found to adsorb fluoride rapidly and effectively. The fluoride removal was influenced by pH. Adsorption model followed first-order reaction at different temperature, theapparent adsorption activated energyE, was 6.37 kJ·mol−1, and adsorption enthalpy ΔH was 5.35 kJ·mol−1. The adsorption capacity of fluoride on adsorbent was 3.2 mmol·g−1 (dry weight). The maximal integer coordination ratio of fluoride with Fe(III) LECCA was 3∶1. The ligand exchange mechanism of adsorption was elucidated through chemical methods and IR spectral analysis. Foundation item: Supported by the National Natural Science Foundation of China (29977010) and Shanghai Priority Academic Discipline Biography: ZHAO Ya-ping (1974-), female, Ph.D., research direction: water and wastewater treatment. |
| |
Keywords: | fluoride Fe(III)LECCA adsorption mechanism ligand exchange |
本文献已被 SpringerLink 等数据库收录! |
|