Layered double hydroxides (LDH) are a class of naturally occurring and synthetic anionic clays classified under the hydrotalcite-like compound. Fluoride (F-) is an essential micronutrient for the calcification of bone and dental enamel formation. But excessive intake causes skeletal and dental fluorosis. The contamination of F in surface and groundwater could come either from natural geological sources and industrial wastewater. Nitrate (NO3-) is a widely spread groundwater contaminant. It causes severe health & environmental problems like blue baby syndrome and eutrophication. LDH can be synthesized by using the co-precipitation method. Magnesium dichloride hexahydrate (MgCl2.6H2O), Aluminium chloride hexahydrate (AlCl3.6H2O), Potassium Hydroxide ( KOH ), Potassium Carbonate ( K2CO3 ), Deionized water were used to synthesize LDH. It is a comparatively economically feasible synthesis method. The synthetic product can be identified by using the Powder X-ray Diffraction (PXRD) method by using the values at 7.5916(003), 3.8011(006), 3.1390(009) (JCPDS-22-700) and Fourier Transform Infrared Spectroscopy (FTIR) peaks at 558 cm-1(Mg-O stretching), 876 cm-1(Al-O stretching), 1411 cm-1 (C-O stretching), 3200- 3500 cm-1 (O-H stretching). LDH was stirred with F- and NO3-for 0 - 4 hours respectively. After each 10 minutes time interval, remaining anion concentrations were measured respectively. Finally, the best fitted kinetic model was found for each. Removal of fluoride has been successfully followed Pseudo second-order kinetic model and the kinetics of fluoride removal is not affected by initial concentration and amount of adsorbent quantity. The highest efficiency of removal of fluoride has been found with 4.00x103 mg L-1of LDH and the initial fluoride concentration was 10.00 mg L-1. Removal of nitrate has successfully followed the Pseudo 1st order kinetic model. The efficiency of F removal is 87.58%, while nitrate removal efficiency is 85.38%.
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