KIT | KIT-Bibliothek | Impressum

Impact of laterite characteristics on fluoride removal from water

Osei, J.; Gawu, S.K.Y.; Schäfer, A.I.; Atipoka, F.; Momade, F.W.Y.

Abstract (englisch):
BACKGROUND

The presence of high concentrations of fluoride in groundwater is a threat to the provision of potable water especially to rural communities. Various substances have been suggested for the removal of fluoride from water. This work investigates the characteristics of laterite, which makes it an adsorbent applicable to fluoride removal.


RESULTS

Chemical and mineralogical analyses of the laterite using X-ray fluorescence (XRF) and X-ray diffraction (XRD) techniques showed varying amounts of iron oxide/hydroxide (goethite/hematite), silica (quartz) and kaolinite. Scanning electron microscopy (SEM) combined with energy dispersive X-ray (EDX) analysis revealed intimate association of all minerals. Isoelectronic point (IEP) value was largely influenced by the mineralogical composition with higher values for higher iron oxide/hydroxide content.


CONCLUSION

While variation in the initial pH of fluoride solution had an effect on fluoride adsorption, the impact of IEP (and hence indirectly pHpzc) was not significant in adsorption. Samples heat treated at 400 °C performed better in fluoride adsorption. The mechanism ... mehr


Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.1002/jctb.4656
ISSN: 0021-8871, 0142-0356, 0268-2575, 0368-4075, 0375-9210, 1097-4660
KITopen ID: 1000060458
HGF-Programm 12.02.03; LK 01
Erschienen in Journal of chemical technology & biotechnology
Heft 91
Seiten 911 - 920
Schlagworte laterite; chemical; mineralogical; fluoride adsorption; mechanism pH
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page