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Removal of fluoride from aqueous phase by biosorption onto algal biosorbent Spirogyra sp.-IO2: sorption mechanism elucidation.
J Hazard Mater. 2007 Mar 22; 141(3):465-74.JH

Abstract

This communication presents results pertaining to the adsorptive studies carried out on fluoride removal onto algal biosorbent (Spirogyra IO2). Batch sorption studies were performed and the results revealed that biosorbent demonstrated ability to adsorb the fluoride. Influence of varying the conditions for removal of fluoride, such as the fluoride concentration, the pH of aqueous solution, the dosage of adsorbent, the temperature on removal of fluoride, and the adsorption-desorption studies were investigated. Sorption interaction of fluoride on to algal species obeyed the pseudo first order rate equation. Experimental data showed good fit with the Langmuir's adsorption isotherm model. Fluoride sorption was found to be dependent on the aqueous phase pH and the uptake was observed to be greater at lower pH. Maximum fluoride sorption was observed at operating 30 degrees C operating temperature. Adsorption-desorption of fluoride into inorganic solutions and distilled water was observed and this indicated the combined effect of ion exchange and physical sorption phenomena. Significant changes in the FT-IR spectra was observed after fluoride sorption which is indicative of the participation of surface function groups associated with hydrogen atoms in the carboxylic groups in sorption interaction. From X-ray photoelectron spectroscopy (XPS) analysis a marginal increase in the area for the binding energy peak at 287.4eV was observed which could be due to the formation of -C-F- bonds. Thermogravimetric (TGA) analysis of the fluoride loaded sorbent showed that the biosorbent underwent three steps decomposition process when heated from 25 to 100 degrees C. The maximum weight loss was observed to be between 200 and 400 degrees C and 700 and 800 degrees C.

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Authors+Show Affiliations

Venkata Mohan S
Bioengineering and Environmental Centre, Indian Institute of Chemical Technology, Hyderabad 500007, India. vmohan_s@yahoo.com
Ramanaiah SV
No affiliation info available
Rajkumar B
No affiliation info available
Sarma PN
No affiliation info available

MeSH

AdsorptionChlorophytaFluoridesHydrogen-Ion ConcentrationMicroscopy, Electron, ScanningSpectroscopy, Fourier Transform InfraredSpectrum AnalysisSurface PropertiesTemperatureThermogravimetryWater Pollutants, ChemicalWater PurificationX-Rays

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16920254

Citation

Venkata Mohan, S, et al. "Removal of Fluoride From Aqueous Phase By Biosorption Onto Algal Biosorbent Spirogyra sp.-IO2: Sorption Mechanism Elucidation." Journal of Hazardous Materials, vol. 141, no. 3, 2007, pp. 465-74.
Venkata Mohan S, Ramanaiah SV, Rajkumar B, et al. Removal of fluoride from aqueous phase by biosorption onto algal biosorbent Spirogyra sp.-IO2: sorption mechanism elucidation. J Hazard Mater. 2007;141(3):465-74.
Venkata Mohan, S., Ramanaiah, S. V., Rajkumar, B., & Sarma, P. N. (2007). Removal of fluoride from aqueous phase by biosorption onto algal biosorbent Spirogyra sp.-IO2: sorption mechanism elucidation. Journal of Hazardous Materials, 141(3), 465-74.
Venkata Mohan S, et al. Removal of Fluoride From Aqueous Phase By Biosorption Onto Algal Biosorbent Spirogyra sp.-IO2: Sorption Mechanism Elucidation. J Hazard Mater. 2007 Mar 22;141(3):465-74. PubMed PMID: 16920254.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of fluoride from aqueous phase by biosorption onto algal biosorbent Spirogyra sp.-IO2: sorption mechanism elucidation. AU - Venkata Mohan,S, AU - Ramanaiah,S V, AU - Rajkumar,B, AU - Sarma,P N, Y1 - 2006/07/10/ PY - 2006/05/03/received PY - 2006/07/04/revised PY - 2006/07/05/accepted PY - 2006/8/22/pubmed PY - 2007/5/19/medline PY - 2006/8/22/entrez SP - 465 EP - 74 JF - Journal of hazardous materials JO - J Hazard Mater VL - 141 IS - 3 N2 - This communication presents results pertaining to the adsorptive studies carried out on fluoride removal onto algal biosorbent (Spirogyra IO2). Batch sorption studies were performed and the results revealed that biosorbent demonstrated ability to adsorb the fluoride. Influence of varying the conditions for removal of fluoride, such as the fluoride concentration, the pH of aqueous solution, the dosage of adsorbent, the temperature on removal of fluoride, and the adsorption-desorption studies were investigated. Sorption interaction of fluoride on to algal species obeyed the pseudo first order rate equation. Experimental data showed good fit with the Langmuir's adsorption isotherm model. Fluoride sorption was found to be dependent on the aqueous phase pH and the uptake was observed to be greater at lower pH. Maximum fluoride sorption was observed at operating 30 degrees C operating temperature. Adsorption-desorption of fluoride into inorganic solutions and distilled water was observed and this indicated the combined effect of ion exchange and physical sorption phenomena. Significant changes in the FT-IR spectra was observed after fluoride sorption which is indicative of the participation of surface function groups associated with hydrogen atoms in the carboxylic groups in sorption interaction. From X-ray photoelectron spectroscopy (XPS) analysis a marginal increase in the area for the binding energy peak at 287.4eV was observed which could be due to the formation of -C-F- bonds. Thermogravimetric (TGA) analysis of the fluoride loaded sorbent showed that the biosorbent underwent three steps decomposition process when heated from 25 to 100 degrees C. The maximum weight loss was observed to be between 200 and 400 degrees C and 700 and 800 degrees C. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/16920254/Removal_of_fluoride_from_aqueous_phase_by_biosorption_onto_algal_biosorbent_Spirogyra_sp__IO2:_sorption_mechanism_elucidation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(06)00799-0 DB - PRIME DP - Unbound Medicine ER -