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Adsorption of Fluoride from water using Spirulina platensis and its Measurement using Fluoride Ion Selective Electrode

Author Affiliations

  • 1 Department of Biotechnology, Shridevi Institute of Engineering and Technology, Tumkur-572106, INDIA
  • 2 Department of Biotechnology, Sapthagiri College of Engineering, Bangalore-57, INDIA

Res.J.chem.sci., Volume 4, Issue (6), Pages 41-44, June,18 (2014)


Fluorosis is an endemic worldwide, including India due to consumption of Fluorine containing underground water (>1.5 mg/l) routinely. Defluoridation is very essential. Adsorption of fluoride from contaminated water is economic yet efficient method. Considering bioadsorbent for defluoridation is more beneficial than conventional adsorbents such as alumina, activated carbon etc., both in terms of quality and quantity. In our experimental studies, we have used dry biomass of Spirulina platensis as a bioadsorbent to defluoridate water samples. Based upon the multivariable studies pH, adsorbent dosage, initial fluoride concentration and contact time, we have found that in lab scale, at pH 5 and adsorbent dosage of 1.0g/100ml and at the fluoride concentration of 20 mg/l, maximum adsorption (97.10%) takes place. Langmuir isothermal model suits well for the adsorption of fluoride from water using Spirulina as bioadsorbent. The FTIR spectroscopy results were also checked to know the cause of adsorption.


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