Fluoride adsorption onto an acid treated lateritic mineral from Kenya: Equilibrium studies

Simple item page
dc.contributor.authorWambu, Enos W.
dc.contributor.authorOnindo, Charles O.
dc.contributor.authorAmbusso, Willis J.
dc.contributor.authorMuthakia, Gerald K.
dc.date.accessioned2017-12-06T09:51:47Z
dc.date.available2017-12-06T09:51:47Z
dc.date.issued2012
dc.descriptionResearch Articleen_US
dc.description.abstractAdsorption of fluoride (F) ions from water using acid treated lateritic mineral (LM-1) from Kenya was studied by batch experiments. The effect of acid-treatment of adsorbent and change in temperature, mass of LM-1, pH and selected competing ions was evaluated. The adsorption process was strongly influenced by temperature, pH and adsorbent dosage. The percentage F removal increased the presence of the nitrate and the chlorate ions but decreased the presence of sulphates, chloride and phosphate ions. Adsorption isotherms were classified according to Giles’ classification and the adsorption data validated using Langmuir and Freundlich isotherms. The data correlated to both the Langmuir and Freundlich isotherms although the data fit to the Freundlich model was somehow better. This showed that F adsorption onto LM-1 followed a mixed adsorption mechanism in which physisorption reactions involving intra-particle diffusion of F into mesoporous sites in LM-1 became increasingly important at higher concentrations and temperatures whereas ion-exchange mechanism involving surface OH- appear to dominate at low surface coverage in more alkaline conditions. With maximum adsorption capacity of 10.5 mg/g, LM-1 could be used to remove F water.en_US
dc.identifier.citationAfrican Journal of Environmental Science and Technology Vol. 6(3), pp. 160-169, March 2012en_US
dc.identifier.issn1996-0786
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/17914
dc.language.isoenen_US
dc.publisherAcademic Journalsen_US
dc.subjectEquilibrium analysisen_US
dc.subjectFluoride adsorptionen_US
dc.subjectLangmuir and Freundlich isothermsen_US
dc.subjectLateritic mineral adsorbenten_US
dc.subjectLow-cost adsorbentsen_US
dc.titleFluoride adsorption onto an acid treated lateritic mineral from Kenya: Equilibrium studiesen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Fluoride adsorption onto an acid treated lateritic.pdf
Size:
412.86 KB
Format:
Adobe Portable Document Format
Description:
Full Text Article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
RP-Department of Chemistry