Precipitation and adsorption during fluoride removal from water by calcite in the presence of acetic acid

ABSTRACTDefluoridation of groundwater is of major concern in several places around the world, such as North and East Africa, India and China. In this paper, removal of fluoride from model solutions and a Tunisian groundwater sample was performed using calcite particles in the presence of acetic acid in batch experiments. After 1 h decantation, dead-end microfiltration was further used to retain the fluorite (CaF2) precipitates present in the supernatant. At 5 mg L−1 fluoride concentration, removal efficiency was found to increase from 17.4% without acid to 30.4% with 0.1 M acetic acid. The increase in fluoride removal with acetic acid was mainly attributed to the renewal of the area available for adsorption on the calcite particles. At the fluoride concentration of 50 mg L−1, the removal efficiency was equal to 9.5% without acid and 94.3% with the addition of 0.1 M acetic acid. The removal of fluoride was attributed to precipitation as a result of higher supersaturation in the solution. Optimum parameters...

[1]  C. Fuller,et al.  A model for trace metal sorption processes at the calcite surface: Adsorption of Cd2+ and subsequent solid solution formation , 1987 .

[2]  Meenakshi,et al.  Fluoride in drinking water and its removal. , 2006, Journal of hazardous materials.

[3]  S. Ayoob,et al.  A Conceptual Overview on Sustainable Technologies for the Defluoridation of Drinking Water , 2008 .

[4]  A. Schäfer,et al.  Impact of pH on the removal of fluoride, nitrate and boron by nanofiltration/reverse osmosis , 2010 .

[5]  W. Pickering.  The mobility of soluble fluoride in soils , 1985 .

[6]  B. K. Mishra,et al.  Review of fluoride removal from drinking water. , 2009, Journal of environmental management.

[7]  R. Sippel,et al.  Experimental pseudomorphs: replacement of calcite by fluorite , 1962 .

[8]  C. Charcosset,et al.  Defluoridation of water by nanofiltration , 2013 .

[9]  D. Rowell,et al.  THE ADSORPTION AND PRECIPITATION OF PHOSPHATE ONTO CALCITE , 1981 .

[10]  J. Buffle,et al.  Combined use of calcium salts and polymeric aluminium hydroxide for defluoridation of waste waters , 1986 .

[11]  J. A. Kittrick,et al.  The mechanism of Zn2+ adsorption on calcite , 1988 .

[12]  E. Ngameni,et al.  Evaluation of removal efficiency of fluoride from aqueous solution using new charcoals that contain calcium compounds. , 2010, Journal of colloid and interface science.

[13]  Imam Bakhsh Solangi,et al.  Removal of fluoride from aqueous environment by modified Amberlite resin. , 2009, Journal of hazardous materials.

[14]  P. Jaouen,et al.  Transfer of monovalent anions and nitrates especially through nanofiltration membranes in brackish water conditions , 2004 .

[15]  D. Simonsson.  Reduction of Fluoride by Reaction with Limestone Particles in a Fixed Bed , 1979 .

[16]  J. Sandeaux,et al.  Defluoridation of groundwater by a hybrid process combining adsorption and Donnan dialysis , 2002 .

[17]  S. K. Nath,et al.  Fluoride removal from water using crushed limestone , 2010 .

[18]  R. Patel,et al.  Evaluation of removal efficiency of fluoride from aqueous solution using quick lime. , 2007, Journal of hazardous materials.

[19]  S. Sloan,et al.  A calcite permeable reactive barrier for the remediation of Fluoride from spent potliner (SPL) contaminated groundwater. , 2008, Journal of contaminant hydrology.

[20]  N. Mameri,et al.  Fluoride removal from brackish water by electrodialysis , 2001 .

[21]  S. K. Nath,et al.  Acid-enhanced limestone defluoridation in column reactor using oxalic acid , 2012 .

[22]  W. Pickering,et al.  Fluoride sorption by soil components: calcium carbonate, humic acid, manganese dioxide and ailica , 1985 .

[23]  M. McBride.  Chemisorption and Precipitation of Mn2+ at CaCO3 Surfaces1 , 1979 .

[24]  D. Parker,et al.  Adsorption kinetics of fluoride on low cost materials. , 2003, Water research.

[25]  O. Trautz,et al.  Experiments with calcium carbonate phosphates and the effect of topical application of sodium fluoride. , 1961, Archives of oral biology.

[26]  M. Pontie,et al.  Selective demineralization of water by nanofiltration application to the defluorination of brackish water. , 2001, Water research.

[27]  Min Yang,et al.  Fluoride removal in a fixed bed packed with granular calcite , 1999 .

[28]  P. Binning,et al.  Fluoride removal by calcite: evidence for fluorite precipitation and surface adsorption. , 2005, Environmental science & technology.

[29]  L. Mccaffrey.  Distribution and causes of high fluoride groundwater in the western Bushveld area of South Africa , 1998 .

[30]  S. K. Nath,et al.  Enhancement of limestone defluoridation of water by acetic and citric acids in fixed bed reactor. , 2010 .

[31]  N. Mondal,et al.  Eggshell Powder as an Adsorbent for Removal of Fluoride from Aqueous Solution: Equilibrium, Kinetic and Thermodynamic Studies , 2012 .

[32]  Yan-xin Wang,et al.  A Limestone Reactor for Fluoride Removal from Wastewaters , 2000 .

[33]  W. Pickering,et al.  Interaction of clays with dilute fluoride solutions , 1984 .

[34]  J. Meima,et al.  Sorption and sorption reversibility of cadmium on calcite in the presence of phosphate and sulfate , 1997 .

[35]  Ali Tor,et al.  Removal of fluoride from water by using granular red mud: Batch and column studies. , 2009, Journal of hazardous materials.

[36]  M. A. Diallo,et al.  Performance of Nanofiltration (NF) and Low Pressure Reverse Osmosis (LPRO) Membranes in the Removal of Fluorine and Salinity from Brackish Drinking Water , 2011 .

[37]  C. Charcosset,et al.  Removal of fluoride ions using cuttlefish bones , 2011 .

[38]  S. K. Nath,et al.  Effect of acid on morphology of calcite during acid enhanced defluoridation , 2011 .

[39]  S. Meenakshi,et al.  Identification of selective ion-exchange resin for fluoride sorption. , 2007, Journal of colloid and interface science.