naa a22 4500 510749402 CHVBK 20180411083059.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1727-6 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1727-6 Defluoridation of Drinking Water Using PURAL® MG-20 Mixed Hydroxide Adsorbent [Elektronische Daten] [Gaurang Patankar, Amruta Tambe, Bhaskar Kulkarni, Alexander Malyshew, Sanjay Kamble] The potential of mixed alumina-magnesia hydroxide adsorbent (PURAL® MG-20) for defluoridation of drinking water using batch and continuous mode of operations has been reported in the present article. Systematic adsorption experiments were carried out to elucidate the effects of different process parameters such as adsorbent dose, initial fluoride concentration, pH of the solution and effect of other ions (usually present in groundwater). These studies were aimed to understand the adsorption behaviour of the PURAL® MG-20 adsorbents. Fluoride adsorption by PURAL® MG-20 sorbent was found pH dependent. Maximum fluoride removal efficiency was observed in the range of pH5-7. Langmuir isotherm described the data better than Freundlich and Temkin isotherm models and the adsorption capacity was found to be 5.62mgg−1 at initial fluoride concentration of 5.13mgL−1, pH7 and contact time 24h. The kinetic result shows that the fluoride sorption follows pseudo-second-order kinetics. Column breakthrough studies were performed to test the performance of the adsorbent media at continuous mode of operation. Thus, it can be concluded that PURAL® MG-20 adsorbent can be used directly for field applications since it shows high fluoride uptake capacity under simulated drinking water conditions and it is also commercially available. Springer Science+Business Media Dordrecht, 2013 Defluoridation of drinking water nationallicence Mixed hydroxide adsorbent nationallicence Kinetic modelling nationallicence Breakthrough studies nationallicence A T : Temkin isotherm equilibrium binding constant (in litre per milligram) nationallicence B T : Temkin isotherm constant nationallicence C o : Initial concentration of fluoride (in milligram per litre) nationallicence C e : Equilibrium concentration of fluoride ion (in milligram per litre) nationallicence K : Langmuir isotherm constant nationallicence K 1 : Pseudo-first-order rate constant (in per minute) nationallicence K 2 : Rate constant for second-order adsorption (in gram per milligram minute) nationallicence K F : Freundlich constants nationallicence K p : Intraparticle diffusion rate constant (in milligram per gram square root minute) nationallicence m : Weight of adsorbent used per litre of solution (in gram per litre) nationallicence n : Adsorption intensity nationallicence q t : Amount of adsorbate retained at time t (in milligram per gram) nationallicence q e : Adsorption capacity (in milligram per gram) of the solid at equilibrium nationallicence q max : Maximum sorption capacity corresponding to complete monolayer coverage (in milligram per gram) nationallicence V : Volume of the aqueous solution (L) nationallicence W : Mass of the adsorbent (g) nationallicence Patankar Gaurang Chemical Engineering Division, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, 400019, Mumbai, India aut Tambe Amruta Chemical Engineering and Process Development Division, National Chemical Laboratory (CSIR), Dr. Homi Bhabha Road, 411008, Pune, India aut Kulkarni Bhaskar Chemical Engineering and Process Development Division, National Chemical Laboratory (CSIR), Dr. Homi Bhabha Road, 411008, Pune, India aut Malyshew Alexander Sasol Germany GmbH, Hamburg, Germany aut Kamble Sanjay Chemical Engineering and Process Development Division, National Chemical Laboratory (CSIR), Dr. Homi Bhabha Road, 411008, Pune, India aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-13 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1727-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1727-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Patankar Gaurang Chemical Engineering Division, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, 400019, Mumbai, India aut NATIONALLICENCE 700 1- Tambe Amruta Chemical Engineering and Process Development Division, National Chemical Laboratory (CSIR), Dr. Homi Bhabha Road, 411008, Pune, India aut NATIONALLICENCE 700 1- Kulkarni Bhaskar Chemical Engineering and Process Development Division, National Chemical Laboratory (CSIR), Dr. Homi Bhabha Road, 411008, Pune, India aut NATIONALLICENCE 700 1- Malyshew Alexander Sasol Germany GmbH, Hamburg, Germany aut NATIONALLICENCE 700 1- Kamble Sanjay Chemical Engineering and Process Development Division, National Chemical Laboratory (CSIR), Dr. Homi Bhabha Road, 411008, Pune, India aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-13 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer