Fluoride removal performance of phosphoric acid treated lime: Breakthrough analysis and point-of-use system performance

Journal article

Authors / Editors

Ochieng, Aoyi

Research Areas

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Publication Details

Author list: Murutu C, Onyango MS, Ochieng A, Otieno FAO

Publisher: Water Research Commission

Place: PRETORIA

Publication year: 2012

Journal acronym: WATER SA

Volume number: 38

Issue number: 2

Start page: 279

End page: 285

Number of pages: 7

ISSN: 0378-4738

Languages: English-Great Britain (EN-GB)

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Abstract

Fluoride in drinking water above permissible levels is responsible for dental and skeletal fluorosis. In this study, removal of fluoride ions from water using phosphoric acid treated lime was investigated in continuous and point-of-use system operations. In the continuous column operations, fluoride removal performance was investigated as a function of the fluoride concentration, flow rate and amount of adsorbent mass. Early saturation and lower fluoride removal were observed at higher flow rate and initial concentration, and at lower mass. Two domestic defluoridation point-of-use systems operated intermittently to process 20 l.day(-1) of water were used. High fluoride uptake capacity (FUC) from groundwater was observed depicting the suitability of the new media in defluoridation. However, further research is required to optimise the point-of-use systems performances.

Keywords

Adsorption, Breakthrough, fluoride, lime

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