Use of oxide minerals to abate fluoride from water

Mohapatra, Debendra K.; Mishra, Dillip Kumar; Mishra, Smita; Chaudhury, G. Roy; Das, Rajashree

doi:10.1016/j.jcis.2004.02.051

Cited by 113 publications

(62 citation statements)

References 13 publications

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“…In this study, fluoride removal using bauxite from the Sadrabad, Shahid Nilchian, Biglar, Khidbas, Hassanabad, and Khezri mines and using pseudo first order kinetics with a correlation coefficient greater than 0.950 showed better results than pseudo second order kinetics. The results of this study were consistent with those of other similar studies, such as Mohapatra et al (39), Das et al (40), and Sujana et al (8). Fluoride removal using bauxite from the Shomal-e-Yazd, Tash, Mendon, Jajarm, and Shahbalaghi mines and using pseudo second order kinetics with a correlation coefficient greater than 0.984 showed better results than the pseudo first order kinetics.…”

Section: Discussionsupporting

confidence: 92%

“…In India, Mohapatra et al used mineral oxides to remove fluoride. Similar behavior was observed with increased amounts of adsorbent (39). In this study, fluoride removal using bauxite from the Sadrabad, Shahid Nilchian, Biglar, Khidbas, Hassanabad, and Khezri mines and using pseudo first order kinetics with a correlation coefficient greater than 0.950 showed better results than pseudo second order kinetics.…”

Section: Discussionsupporting

confidence: 74%

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Use of bauxite from active Iranian mines for the removal of fluoride from drinking water

Malakootian

Javdan

Iranmanesh

2017

Environ Health Eng Manag

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Background: Fluoride plays an important role in bone and dentin mineralization; however, excess fluoride intake is harmful to mankind. Methods: This study evaluated the performance of bauxite from active Iranian mines in removing fluoride from drinking water. The effects of pH, contact time, adsorbent dose, and fluoride concentration on defluoridation and removal efficiency were determined. Kinetics and adsorption isotherms were studied. Fluoride levels were measured using SPADNS. Data analysis was performed using SPSS16. Results: Bauxite from the Jajarm mine had the lowest adsorbency (20 g/L) and required the shortest contact time (90 minutes) to reach equilibrium compared with the ore from bauxite mines evaluated in another study which had greater efficiency rates in removing fluoride from drinking water (58.15%). The fluoride removal efficiency rates of the other bauxite mines were as follows: Mendon > Sadrabad > Khidabas > Khezri > Shahbalaghi > Tash > Biglar. Bauxite from Shomal-e Yazd, Hasanabad, and Shahid Nilchian mines could not achieve the required efficiency to remove fluoride from drinking water without initial preparation and modification. The removal efficiency rates of actual samples were much lower than the synthetic samples because of confounding factors. Conclusion: As a result of the low cost and abundant availability of bauxite and the fact that its use does not require a particular expertise or sophisticated technology, the removal efficiency of this adsorbent can be increased to desirable levels through the use of corrective methods such as heating, acidifying, particle crushing, or the mixing of two or more removal systems. Keywords: Fluoride, Iran, drinking water, kinetics Citation: Malakootian M, Javdan M, Iranmanesh F. Use of bauxite from active Iranian mines for the removal of fluoride from drinking water.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 74%

Use of bauxite from active Iranian mines for the removal of fluoride from drinking water

Malakootian

Javdan

Iranmanesh

2017

Environ Health Eng Manag

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“…Various techniques are use for fluoride removal such as precipitation [5], DOI: 10.18535/ijsrm/v5i6.45 ion exchange [6], reverse osmosis [7], donnan dialysis [8], electro dialysis [9], nano filtration [10], membrane based methods [11], electro coagulation [12] and adsorption by using different adsorbents [13] [14] [15] [16]. It is very important to select choose an suitable technique based on economical, cheap, easy to handle, availability of materials and reuse of materials etc.…”

Section: Introductionmentioning

confidence: 99%

Calcium Ion Impregnated on Water Hyacinth for Defluoridation of Water

Gajbhiye¹,

Kulkarni²,

Kulkarni³

2017

ijsrm

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Fluoride ion has adverse effect to human body if it exceeded beyond the permissible limit. Adsorption technique is one of the efficient method for removal of fluoride from water by using biomass. In present work water hyacinth (Eichhornia Crassipes) leaf powder was used as biomass along with the loaded calcium ion. Calcium carbonate (CaCO 3 ) was used as doping reagent in microwave. Batch experiments were carried out for 5-25 mg/l of fluoride concentration. It was observed that using water hyacinth loaded with the calcium ion 83.34 % fluoride removal was achieved. The effect of various parameters on fluoride removal was studied in batch experiments.

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“…Several techniques for fl uoride removal have been developed, including membrane fi ltration 7 , ion exchange 8 , electrocoagulation 9 , precipitation 10 , nanofi ltration 11 , and adsorption 12 . Because of its low cost, simplicity of design, and ease of operation, the adsorption technique has been the most extensively used of these techniques.…”

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confidence: 99%