Removal of Fluoride from Aqueous Solutions by Adsorption using a Siliceous Mineral of a Kenyan Origin

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dc.contributor.authorWambu, E.W.
dc.contributor.authorOnindo, C.O.
dc.contributor.authorAmbusso, W.
dc.contributor.authorMuthakia, G. K.
dc.date.accessioned2014-08-07T13:08:33Z
dc.date.available2014-08-07T13:08:33Z
dc.date.issued2013-04-01
dc.description10.1002/clen.201100171en_US
dc.description.abstractThe problem of high fluoride in water sources in Africa and the rest of the developing world has exacerbated in the latest past due to increasing shortage of water. More people are being exposed to high water fluoride resulting in elevated levels of fluorosis in the societies. Fluoride (F) adsorption from solutions using a siliceous mineral from Kenya (M1) was studied on batch basis and results verified on high fluoride water using fixed-bed column experiments. About100% batch F adsorption wasachieved at 200mg/L F concentration, 0.5g/mL adsorbent dosage, 303–333K, and pH 3.4 0.2. Based on Giles classifications, F adsorption isotherm was found to be an H3 type isotherm. The equilibrium data was correlated to Freundlich and Langmuir models and the maximum Langmuir adsorption capacity was found to be 12.4mg/g. Column experiments were conducted for different fluoride concentrations, bed depths, and flow rates. The F breakthrough curves were analyzed using the Thomas model and efficient F adsorption was found to occur at low flow rates and low influent concentrations. The Thomas F adsorption capacity (11.7mg/g) was consistent with the Langmuir isotherm capacity showing that M1 could be applied as an inexpensive medium for water defluoridationen_US
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/10846
dc.language.isoenen_US
dc.publisherWILEY‐VCH Verlagen_US
dc.subjectBatch adsorption,en_US
dc.subjectBreakthrough curve,en_US
dc.subjectEquilibrium isotherm,en_US
dc.subjectFluorosis,en_US
dc.subjectWater quality.en_US
dc.titleRemoval of Fluoride from Aqueous Solutions by Adsorption using a Siliceous Mineral of a Kenyan Originen_US
dc.typeArticleen_US
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