Arid
DOI10.2166/ws.2013.016
Adsorption of fluoride from aqueous solution using low cost adsorbent
Buamah, R.1; Mensah, R. Asare1; Salifu, A.2
通讯作者Buamah, R.
来源期刊WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY
ISSN1606-9749
出版年2013
卷号13期号:2页码:238-248
英文摘要

High fluoride levels beyond the recommended value of 1.5 mg/L have been detected in several groundwater wells in Northern Ghana. This occurrence has led to the capping of many high yielding wells that hitherto have been major sources of drinking water for the populace in these arid areas. Most of the fluoride removal technologies applied in the area has not been versatile in effectively removing fluoride because of the varying water qualities. This study focused on screening adsorbents including high aluminium or iron containing bauxite ores, fabricated zeolite and activated Neem seeds for removal of fluoride from drinking water. The model water used was prepared by simulating the prevailing groundwater quality in Northern Ghana. The high aluminium bauxite ore (HABO) had the highest fluoride removal capacity. Within the pH range tested (5-7), the fluoride removal decreased with increasing pH. Occurrence of sulfate, chloride and nitrate in the model water reduced the fluoride removal capacity by 57, 24 and 38% respectively. The combined effect of these anions showed a 60% reduction in the fluoride removal capacity. The Freundlich and Langmuir isotherms gave an adsorption capacity (K) of 0.90 mg/g for the HABO. The adsorption kinetics fitted well the pseudo second-order kinetic model. The HABO is thermally stable and has kaolinite [Al2Si2O5(OH)(5)] and gibbsite [Al(OH)(3)] as its major components. X-ray fluorescence (XRF) and energy dispersive X-ray (EDX) results showed Al, Fe, Ti, O, C and Si as the predominant elements in the HABO.


英文关键词adsorption bauxite ore EDX fluoride Northern Ghana XRD
类型Article
语种英语
国家Ghana ; Netherlands
收录类别SCI-E
WOS记录号WOS:000334249500005
WOS类目Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS研究方向Engineering ; Environmental Sciences & Ecology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/180243
作者单位1.Kwame Nkrumah Univ Sci & Technol, Dept Civil Engn, Kumasi, Ghana;
2.UNESCO IHE, Inst Water Educ, NL-2601 DA Delft, Netherlands
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GB/T 7714
Buamah, R.,Mensah, R. Asare,Salifu, A.. Adsorption of fluoride from aqueous solution using low cost adsorbent[J],2013,13(2):238-248.
APA Buamah, R.,Mensah, R. Asare,&Salifu, A..(2013).Adsorption of fluoride from aqueous solution using low cost adsorbent.WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY,13(2),238-248.
MLA Buamah, R.,et al."Adsorption of fluoride from aqueous solution using low cost adsorbent".WATER SCIENCE AND TECHNOLOGY-WATER SUPPLY 13.2(2013):238-248.
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