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  • Chem Sci Trans., 2012, 1(2),  pp 239-256  

    DOI:10.7598/cst2012.134

    Research Article

    Studies on Defluoridation of Water by Tea Ash: An Unconventional Biosorbent

  • NABA KUMAR MONDAL*, RIA BHAUMIK, TANMOY BAUR, BISWAJIT DAS, PALAS ROY and JAYANTA KUMAR DATTA
  • Department of Environmental Science, The University of Burdwan, Burdwan-713104, India
    Naba Kumar Mondal, Department of Environmental Science, The University of Burdwan, 713104, India
  • Abstract

    Residual part of tea as a household waste was effectively used for removal of fluoride from aqueous medium. The variable operating parameters such as pH, initial fluoride concentration, sorbent particle size, agitation time and temperature. The defluoridation capacity increases with increasing adsorbent dose and contact time but decrease with initial concentration of fluoride solution. Moreover, acidic pH (6) showed the highest removal of fluoride. Further defluoridation follows second order kinetics and Langmuir and Freundlich adsorption isotherm. The surface and sorption characteristics were analyzed using FTIR and SEM techniques. For domestic and industrial applications, defluoridation with 100% achievement and subsequent regeneration of adsorbent was performed with a household water filter and fixed bed column respectively

    Keywords

    Fluoride removal, Batch study, Tea residue, Isotherm study, Thermodynamic study

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