Batch and column adsorption and desorption of fluoride using hydrous ferric oxide: Solution chemistry and modeling

Nur, Tanjina; Loganathan, P.; Nguyen, Thi Thanh Sang; Vigneswaran, S.; Singh, Govindra; Kandasamy, Jaya

doi:10.1016/j.cej.2014.03.009

Cited by 146 publications

(64 citation statements)

References 30 publications

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“…The resins GMDA, NDA-88 and D-301 with amine groups exhibit the positive charge with protonation appearance in the acid environment while the XAD-4 presents corresponding isoelectric points due to the nonfunctional group structure. So, large amounts of free-state sulfonic acid groups make the charge of H-acid below the isoelectric point, which causes a strong charge interaction with the resins of amine group [24]. According to the Zeta potential-pH profiles, the best adsorption performances might occur within the pH 2-4 due to the electrostatic interaction.…”

Section: Effect Of Ph On the Adsorptionmentioning

confidence: 99%

A comparative study on the adsorption of 8-amino-1-naphthol-3,6-disulfonic acid by a macroporous amination resin

Zhang

Wang

Yang

et al. 2016

Chemical Engineering Journal

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Section: Effect Of Ph On the Adsorptionmentioning

confidence: 99%

A comparative study on the adsorption of 8-amino-1-naphthol-3,6-disulfonic acid by a macroporous amination resin

Zhang

Wang

Yang

et al. 2016

Chemical Engineering Journal

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“…After 8 cycles, the adsorbents were withdrawn from the column, washed, air dried and weighed to find out its loss. It was noticed that there was no significant loss of all the three adsorbents [9].…”

Section: Column Regenerationmentioning

confidence: 99%

Comparative Column Studies of Chemically Modified Ion Exchange Resin With Agglomerated Adsorbents for Fluoride Removal

Chandasekaran¹,

Arthanas²

2016

MJAS

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The present study is aimed to prepare three different granular adsorbents and applying on fluoride removal in column operations. Commercially available powdered adsorbents activated alumina (PAA) and tri-calcium phosphate (PTCP) is agglomerated to obtain granular polymer agglomerated alumina (GPAA) and granular polymer agglomerated tri-calcium phosphate (GTCP). Agglomeration was carried out using powdered adsorbents with neutral and non-toxic polymer Poly (vinyl acetate) to granular form of 20 -50 mesh size. Plain Amberlite IRA 400 anion exchange resin (PR) was chemically modified (CMR) through phosphorylation by alum impregnation and investigated for fluoride removal as a third adsorbent. Column studies were carried out using 1.5 cm diameter columns to find out the suitability of the material for large scale applications. Solutions containing 5 mg L -1 of fluoride adjusted to pH 7.0 were allowed to percolate through the column at known flow rates. Under optimum conditions of flow rate 10 mL min -1 and bed height of 31 cm (25 g) of GPAA, 36 cm (20 g) of GTCP and 42 cm (20 g) of CMR respectively. The amount of fluoride removed were 1.948 mg g -1 , 2.1005 mg g -1 , and 2.3325 mg g -1 of the respective adsorbent. The effects of co-existing anions were also studied in column experiments. Column regeneration studies were also carried out for all the adsorbents with Al 2 (SO 4 ) 3 solutions. The cyclic regeneration experiments indicated that all the three adsorbents could be completely regenerated and used for repeated cycle. Ground water sample was collected from a village in Dharmapuri district of South India. The defluoridation capacity of the wet resin (6.80 mg g -1 ) was found to be three times more than dried resin. CMR potentially can be the best adsorbent for fluoride removal.Keywords: defluoridation, agglomeration, poly vinyl acetate, granular adsorbents, column studies Abstrak Matlamat kajian ini adalah untuk menyediakan tiga penjerap berbutir yang berbeza dan diaplikasikan untuk penyingkiran fluorida dalam operasi turus. Penjerap komersial serbuk teraktif alumina (PPT) dan tri-kalsium fosfat (PTCP) digumpalkan untuk mendapatkan polimer berbutir alumina (GPAA) dan polimer berbutir tri-kalsium fosfat (GTCP). Penggumpalan telah dijalankan dengan menggunakan penjerap serbuk poli polimer (vinil asetat) neutral dan tidak toksik kepada bentuk berbutir dari 20-50 saiz sirat. Amberlit kosong IRA 400 anion resin pertukaran (PR), telah diubahsuai secara kimia (CMR) melalui kaedah pemfosforilan mengunakan impregnasi alum, dan diuji untuk penyingkiran fluorida sebagai penjerap ketiga. Kajian turus telah dilakukan dengan menggunakan 1.5 cm diameter turus bagi mengetahui kesesuaian bahan untuk aplikasi skala besar. Larutan fluorida yang berpekatan 5 mg L -1 dan pH 7.0 dibiarkan meresap melalui turus pada kadar aliran yang telah dikenalpasti. 3 . Eksperimen penghasilan semula kitaran menunjukkan bahawa ketiga-tiga penjerap boleh dihasilkan semula sepenuhnya dan digunakan untuk kitaran berulang. Sampel air bawah ta...

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“…Researchers are mostly focusing their study on various types of inexpensive and effective materials such as different clays, coconut shell carbon, chemically activated carbon, bone charcoal, natural zeolites, burnt clay, activated alumina (Ayoob et al 2008), red mud (Tor et al 2009) alum sludge (Sujana et al 1998), chitosan beads (Viswanathan and Meenakshi 2008), carbonaceous materials (Márquez-Mendoza et al 2012;Ikuo et al 2004), calcite (Yang et al 1999), montmorillonite (Tor 2006), Citrus limonum (lemon) leaf (Tomar et al 2014), Zr-Mn composite material (Tomar et al 2013), kanuma mud (Chen et al 2011), acid-treated bentonite (Ma et al 2011), polypyrrole/Fe 3 O 4 magnetic nanocomposite (Bhaumik et al 2011), bayerite/boehmite nanocomposites (Jia et al 2015), Fe-Mg-La triple-metal composite , hydrous ferric oxide (Nur et al 2014), hydroxyapatite (Jiménez-Reyes and Solache-Ríos 2013), ZnCr-layered double hydroxides and their polymeric composites (Koilraj and Kannan 2013), Ce(IV)-Zr(IV) mixed oxide nanoparticles (Ghosh et al 2015), spent bleaching earth (Mahramanlioglu et al 2002), and other low-cost adsorbents with various degrees of success (Ali 2006;Yadav et al 2006). So, there is a crucial need to explore locally available inexpensive defluoridation materials for safe and easy use at both household and small community levels.…”

Section: Introductionmentioning

confidence: 98%

Behavior of Fluoride Removal by Aluminum Modified Zeolitic Tuff and Hematite in Column Systems and the Thermodynamic Parameters of the Process

Teutli-Sequeira

Solache‐Ríos

Martínez-Miranda

et al. 2015

Water Air Soil Pollut

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The removal of fluoride from water by an aluminum-modified hematite and a zeolitic tuff using column adsorption techniques, as well as the effects of temperature, were investigated. Column experiments were carried out using aqueous solutions and drinking water with different bed depths. The dynamics of the adsorption process were fitted to Adams-Bohart, Thomas and bed depth service time (BDST) models. The Thomas model was found suitable for the description of breakthrough curve at all experimental conditions, while Adams-Bohart model was only useful for an initial part of dynamic behavior of the removal of fluoride from water by aluminum-modified hematite and zeolitic tuff columns. The highest uptake capacities (3.24 and 2.37 mg/g for the modified zeolitic tuff and hematite respectively) were obtained with a 4-cm bed depth column, an inlet 10 mg/L fluoride solution, and a flow rate of 1 mL/min, but the adsorption capacities decreased when drinking water were used. Experimental data were good fitted to both models, and the parameters of the processes calculated indicated that these materials are suitable for removal of fluoride from water in column systems. Thermodynamic parameters (ΔS, ΔG, and ΔH) were calculated for the aluminum-modified hematite and zeolitic tuff from the sorption data at temperatures between 287 and 333 K, indicating spontaneous and thermodynamically favorable adsorption and suggest that the sorption of fluoride ions by both adsorbents is an endothermic process and the mechanism is physical sorption.

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Batch and column adsorption and desorption of fluoride using hydrous ferric oxide: Solution chemistry and modeling

Cited by 146 publications

References 30 publications

A comparative study on the adsorption of 8-amino-1-naphthol-3,6-disulfonic acid by a macroporous amination resin

A comparative study on the adsorption of 8-amino-1-naphthol-3,6-disulfonic acid by a macroporous amination resin

Comparative Column Studies of Chemically Modified Ion Exchange Resin With Agglomerated Adsorbents for Fluoride Removal

Behavior of Fluoride Removal by Aluminum Modified Zeolitic Tuff and Hematite in Column Systems and the Thermodynamic Parameters of the Process

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