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IJCT Vol.17(1) [January 2010] >


Title: Studies on defluoridation of water using magnesium titanate
Authors: Gopal, V
Elango, K P
Keywords: Adsorption
Defluoridation
Isotherms
Magnesium titanate
Issue Date: Jan-2010
Publisher: CSIR
Abstract: Batch sorption system using magnesium titanate as an adsorbent was investigated to remove fluoride ions from the aqueous solution. The amount of fluoride adsorbed from 4 mg L-1 of fluoride solution at 30oC was found to be 0.029 mg g-1. The system variables studied include initial concentration of the sorbate (2-10 mg L-1), adsorbent dose (0.5-5 g/50 mL), agitation time (5-60 min), pH (3-11), co-ions (Cl-, SO42-, NO3-, and HCO3-) and temperature (30-50oC). The experimental data fitted satisfactorily (r>0.97) to the Langmuir isotherms. Thermodynamic parameters such as Ho, So and Go concluded the adsorption is endothermic. The magnitude of the enthalpy change (20-45 kJ mol-1) indicated that the mechanism of adsorption process involves physisorption.
Page(s): 28-33
ISSN: 0975-0991 (Online); 0971-457X (Print)
Source:IJCT Vol.17(1) [January 2010]

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