Adsorption behaviour of calcined layered double hydroxides towards removal of fluoride from aqueous solution

Research Article| September 01 2006 Adsorption behaviour of calcined layered double hydroxides towards removal of fluoride from aqueous solution Liang Lv Liang Lv 1The West Branch of Zhejiang University of Technology, Zhejiang, 324006, China Tel.: +86 570 8510552 Fax: +86 570 8026668; E-mail: lianglv_qzxy@126.com Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2006) 55 (6): 413–418. https://doi.org/10.2166/aqua.2006.026 Article history Received: July 18 2005 Accepted: April 20 2006 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Liang Lv; Adsorption behaviour of calcined layered double hydroxides towards removal of fluoride from aqueous solution. Journal of Water Supply: Research and Technology-Aqua 1 September 2006; 55 (6): 413–418. doi: https://doi.org/10.2166/aqua.2006.026 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Removal of fluoride from aqueous solution by calcined layered double hydroxides (CLDHs) was investigated in batch mode. The influences of calcined temperature, Mg/Al molar ratio of CLDHs, pH of aqueous solution, temperature and co-existing anions on the removal of fluoride have been discussed in detail. It was found that the LDHs with an Mg/Al ratio of 2 calcined at 500°C had the highest capacity to remove fluoride and the maximum percentage removal of fluoride takes place at pH 6.0. The adsorption capacity of CLDHs decreases with a rise in temperature, indicating that the removal process is exothermic in nature. The data from isotherms fitted well to the linearly transformed Langmuir equation. The negative values of ΔG0 and ΔHo calculated using the Langmuir constant, confirm the spontaneous and exothermic nature of the removal of fluoride. adsorption, calcined, defluorination, fluoride, layered double hydroxides, removal This content is only available as a PDF. © IWA Publishing 2006 You do not currently have access to this content.