Evaluation of industrial based adsorbents for simultaneous removal of arsenic and fluoride from drinking water

Bibi, Sadia; Farooqi, Abida; Hussain, Khadim; Haider, Naeem

doi:10.1016/j.jclepro.2014.09.030

Cited by 123 publications

(49 citation statements)

References 42 publications

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“…The results of the present study were compared with several other adsorbents, biochars, and biosorbents, and are given in Table . From the literature, it was found that the present study shows acceptable removal values in comparison to other research findings . The defluoridation capacity in the present study was superior over most of other adsorbents, only ammonium carbonate activated tamarind fruit shell carbon showed a comparable removal value of 83%.…”

Section: Resultssupporting

confidence: 46%

Fluoride Sorption Onto a Steam‐Activated Biochar Derived From Cocos nucifera Shell

Halder

Khan

Dhawane

2015

CLEAN Soil Air Water

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Fluoride‐contaminated water and its potential menace to the human being has been of enormous environmental concern toward exploration of significant remedial measures. The present investigation focused on the removal of fluoride from synthetic wastewater using superheated steam activated biochar (SAB) derived from Cocos nucifera shell. The experiments were carried out under the influence of three operational parameters viz. pH, SAB dose, and contact time in the range of 5–8, 2–7 g/L, and 60–120 min, respectively, following the experimental matrix developed by central composite design approach. SAB was characterized by scanning electron microscopy, Fourier transform IR spectroscopy and X‐ray diffraction to prevail the physical properties and detect the surface contexture. At a fixed initial concentration of 10 mg/L for the synthetic solution, the maximum removal was 83.04% at pH 6.5, contact time 90 min, SAB dose 8.7 g/L, temperature 30 °C and 300 rpm, while for the sample collected from Asanjola it was 81.3% for the initial concentration of 7 mg/L under the same process conditions. The significance of process parameters was checked by analysis of variance and a regression model was derived. The results of the study revealed that the SAB indigenously prepared from C. nucifera shell could be an eminent adsorbent for the defluoridation of water.

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Section: Resultssupporting

confidence: 46%

Fluoride Sorption Onto a Steam‐Activated Biochar Derived From Cocos nucifera Shell

Halder

Khan

Dhawane

2015

CLEAN Soil Air Water

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“…D-R model is expressed by Eqs. (15) and (16), where b is the activity coefficient related to mean sorption energy (mol 2 kJ À2 ); e is the Polanyi potential, R is the ideal gas constant, T is the absolute temperature and E (kJ mol À1 ) is defined as the free energy change required to transfer 1 mol of ions from solution to the solid surfaces, which equals to the following equation:…”

Section: Adsorption Isotherm Analysismentioning

confidence: 99%

“…However, direct comparison of AICFA with other adsorbents is difficult, [3] Zirconium(iv)-impregnated groundnut (Anacardium occidentale) shell carbon 2.23 [64] Cynodon dactylon-based activated carbon 7.0 4.617 [65] Zirconium impregnated cashew nut (Anacardium occidental) shell carbon 7.0 1.83 [66] Sugarcane bagasse carbon [16] Phyllanthus embolic based thermally activated carbon 7.0 7.014 [67] Pecan (carya illinoinensis)nut shell carbon modified with egg shells calcium 7.0 1.61-2.51 [68] Scandinavia spruce wood modified with aluminum and iron oxides carbonized at 500°C 6.9 7.92 [69] Scandinavia spruce wood modified with aluminum and iron oxides carbonized at 650°C 6.9 5.67 [69] Scandinavia spruce wood modified with aluminum and iron oxides carbonized at 900°C 6.9 5.67 [69] Activated bagasse carbon 6.0 1.15 [15] Aluminum impregnated coconut fiber ash 5.0 a 3.192 a Current studied a Freundlich adsorption capacity. and it was found, in general, that the adsorption capacity of AICFA for fluoride ions is comparable with that of other adsorbents and in fact greater than certain adsorbents reported earlier.…”

Section: Comparison With Other Adsorbentsmentioning

confidence: 99%

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Removal of fluoride by aluminum impregnated coconut fiber from synthetic fluoride solution and natural water

Mondal

Bhaumik

Datta

2015

Alexandria Engineering Journal

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Aluminum impregnated coconut fiber ash (AICFA) was used for removal of fluoride from synthetic fluoride solution. The AICFA showed high specific area and strong affinity toward fluoride. Synthesized AICFA was characterized by pH ZPC , FTIR, SEM and XRD studies. Adsorption kinetics indicated that the adsorption equilibrium was reached within 60 min and the adsorption process followed the pseudo-second-order kinetic model better. The Langmuir isotherm model could fit the experimental data well. Thermodynamic parameters such as Gibbs free energy (DG ), enthalpy (DH ) and entropy (DS ) change of sorption were also evaluated which indicated that the adsorption process was spontaneous, feasible and exothermic in nature. Furthermore, the coexisting anions had significant effect on fluoride adsorption. Moreover, desorption study with AICFA showed that nearly 98% of fluoride could be leached out at pH 12. Further, the reusable properties of the material supported the possibility of its use commercially. Ó 2015 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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“…In the world, it is estimated that more than 200 million people are exposed to drinking water with a fluoride concentration that exceeds the WHO guideline (1.5 mg.L -1 ) (Bhatnagar, Kumar, & Sillanpää, 2011). Many countries around the world such as India, Bangladesh, Nepal, Sénégal, USA, and Mexico are concerned by fluoride exposure because of the high numbers of their populations that present the effects caused by the high concentration of fluoride in their drinking water (Fawell et al, 2006;Bibi, Farooqi, Hussain, & Haider, 2015).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Conversion of Agriculture and Food Waste into Activated Carbons Devoted to Fluoride Removal from Drinking Water in Senegal

Hervy

Diop²,

Gérente

et al. 2015

IJC

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The objective of this study was to investigate the production of activated carbons (AC) from cashew shells, and millet stalks and their efficiency in fluoride retention. These agricultural residues are collected from Senegal. It is known that some regions of Sénégal, commonly called the groundnut basin, are affected by a public health problem caused by an excess of fluoride in drinking water used by these populations. The activated carbons were produced by a combined pyrolysis and activation with water steam; no other chemical compounds were added. Then, activated carbonaceous materials obtained from cashew shells and millet stalks were called CS-H 2 O and MS-H 2 O respectively. CS-H 2 O and MS-H 2 O show very good adsorbent features, and present carbon content ranges between 71 % and 86 %. The BET surface areas are 942 m² g -1 and 1234 m².g -1 for CS-H 2 O and MS-H 2 O respectively. A third activated carbon produced from food wastes and coagulation-flocculation sludge (FW/CFS-H 2 O) was produced in the same conditions. Carbon and calcium content of FW/CFS-H 2 O are 32.6 and 39.3 % respectively. The kinetics sorption were performed with all these activated carbons, then the pseudo-first equation was used to describe the kinetics sorption. Fluoride adsorption isotherms were performed with synthetic and natural water with the best activated carbon from kinetics sorption, Langmuir and Freundlich models were used to describe the experimental data. The results showed that carbonaceous materials obtained from CS-H 2 O and MS-H 2 O were weakly efficient for fluoride removal. With FW/CFS-H 2 O, the adsorption capacity is 28.48 mg.g -1 with r² = 0.99 with synthetic water.

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Evaluation of industrial based adsorbents for simultaneous removal of arsenic and fluoride from drinking water

Cited by 123 publications

References 42 publications

Fluoride Sorption Onto a Steam‐Activated Biochar Derived From Cocos nucifera Shell

Fluoride Sorption Onto a Steam‐Activated Biochar Derived From Cocos nucifera Shell

Removal of fluoride by aluminum impregnated coconut fiber from synthetic fluoride solution and natural water

Sustainable Conversion of Agriculture and Food Waste into Activated Carbons Devoted to Fluoride Removal from Drinking Water in Senegal

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