Removal of fluoride from drinking water by natural stilbite zeolite modified with Fe(III)

Sun, Yuan; Fang, Qiang; Dong, Junping; Cheng, Xiaowei; Xu, Jingyi

doi:10.1016/j.desal.2011.04.013

Cited by 179 publications

(71 citation statements)

References 38 publications

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“…However, it is higher than the adsorption rate of natural stilbite zeolite modified with Fe 3? (0.0085 min -1 ) for 5.0 mg/L F À (Sun et al 2011). This indicates that the diffusion of F À into the cavity of iron ore has a significant influence on adsorption process.…”

Section: Adsorption Kinetics Of Fluoridementioning

confidence: 69%

“…In recent years, scientists suggested composite metal oxide as effective adsorbent for fluoride removal (Tchomgui-Kamga et al 2010a;Sun et al 2011;Tomar and Kumar 2013) and the U.S. Patent Trademark Office approved such novel approaches (Yang et al 2010). Iron ore is a mixture of different metal oxides responsible for the removal of fluoride and is one of the most abundant and cheap materials available anywhere in the Rift Valley.…”

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of sorptive removal of fluoride from drinking water using iron ore

et al. 2014

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High concentrations of fluoride in drinking water is a public health concern globally and of critical importance in the Rift Valley region. As a low-cost water treatment option, the defluoridation capacity of locally available iron ore was investigated. Residence time, pH, agitation rate, particle size of the adsorbent, sorbent dose, initial fluoride concentration and the effect of co-existing anions were assessed. The sorption kinetics was found to follow pseudo-first-order rate and the experimental equilibrium sorption data fitted reasonably well to the Freundlich model. The sorption capacity of iron ore for fluoride was 1.72 mg/g and the equilibrium was attained after 120 min at the optimum pH of 6. The sorption study was also carried out at natural pH conditions using natural ground water samples and the fluoride level was reduced from 14.22 to 1.17 mg/L (below the WHO maximum permissible limit). Overall, we concluded that iron ore can be used in water treatment for fluoride removal in the Rift Valley region and beyond.

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Section: Adsorption Kinetics Of Fluoridementioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of sorptive removal of fluoride from drinking water using iron ore

et al. 2014

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“…Uticaj koncentracije adsorbata je važan faktor jer se sa porastom koncentracije fluoridnih jona povećava adsorpcioni kapacitet adsorbenta, ali se i smanjuje procenat ukupno uklonjenih fluoridnih jona [24,25].…”

Section: Uticaj Početne Koncentracije Fluorida I Vremena Kontakta Na unclassified

“…za manje od 20 minuta pri inicijalnoj koncentraciji od 5 mg/L). Radi poređenja može se navesti da je prilikom adsorpcije fluorida na titanijum dioksidu ravnotežno stanje postignuto posle 180 min [25], a na zeolitu nakon 120 minuta [26]. Međutim, sa porastom koncentracije opada efikasnost uklanjanja (posle 50 minuta pri koncentraciji fluorida od 5 mg/L efikasnost uklanjanja je 99% dok je pri 15 mg/L ona 94%), pa je u izboru optimalnih operativnih parametara potrebno naći balans.…”

Section: Uticaj Početne Koncentracije Fluorida I Vremena Kontakta Na unclassified

Fluoride ion adsorption onto Al-alginate particles

Milivojević¹,

Jocic²,

Lopičić³

et al. 2017

Zas Mat

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“…Wide ranges depend on the factors such as the geological, physical and chemical properties of the region and pH, temperature and content of the soil [2]. The current US EPA maximum contaminant level (MCL) of drinking water for fluoride is 4mg/L [3]. Preventive effects of optimal dose fluoride have been proven on the dental caries in children and adults.…”

Section: Introductionmentioning

confidence: 99%

The Hydrogeochemical Occurrence of Fluoride in Groundwater and Its Effect on Human Health: A Case Study from Sanliurfa, Turkey

Atasoy¹,

Yeşilnacar²

2017

eer

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Fluoride ions in drinking water higher than the permissible level lead to negative effects on the human health. More than 200 million people in the world were adversely affected from the high fluorine water. Endemic fluorosis originating from the consumption of high fluorine water was observed also in some parts of Anatolia, Turkey. Volcanic formations are found in areas with high fluoride concentrations in ground waters. In this study, fluoride concentration in ground water was researched in two villages in Sanliurfa where comprised generally sedimental formations thereupon the identified fluorosis cases on the primary school students.

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Removal of fluoride from drinking water by natural stilbite zeolite modified with Fe(III)

Cited by 179 publications

References 38 publications

Experimental evaluation of sorptive removal of fluoride from drinking water using iron ore

Experimental evaluation of sorptive removal of fluoride from drinking water using iron ore

Fluoride ion adsorption onto Al-alginate particles

The Hydrogeochemical Occurrence of Fluoride in Groundwater and Its Effect on Human Health: A Case Study from Sanliurfa, Turkey

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