Adsorption of fluoride, chloride, bromide, and bromate ions on a novel ion exchanger

Chubar, Natália; Samanidou, Victoria F.; Kouts, Volodymyr S.; Gallios, George P.; Kanibolotsky, Valentyn; Стрелко, В. В.; Zhuravlev, Igor Z.

doi:10.1016/j.jcis.2005.04.086

Cited by 149 publications

(86 citation statements)

References 25 publications

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“…Ho [35] first developed the pseudo-second-order kinetic expression for sorption systems, in which chemical sorption was the rate-limiting step; development of this model had been applied in a number of studies [36][37][38]. It can be expressed as…”

Section: (8)mentioning

confidence: 99%

Role of the Mg/Al atomic ratio in hydrotalcite-supported Pd/Sn catalysts for nitrate adsorption and hydrogenation reduction

Wan¹,

Liu²,

Zhao³

et al. 2009

Journal of Colloid and Interface Science

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Hydrotalcite-supported Pd/Sn catalysts with different Mg/Al atomic ratios (2, 3, 4, and 5) for nitrate adsorption and hydrogenation reduction were successfully synthesized by a coprecipitation method. The results showed that different atomic ratios of Mg/Al resulted in different interlayer spacings and zetapotentials of the catalysts, which thus influenced its adsorption capacity. With the increase of Mg/Al atomic ratio, the interlayer spacing rose and zeta-potential decreased. The adsorption properties of the catalysts were mainly affected by interlayer spacing when Mg/Al atomic ratios increased from 2 to 4. However, when Mg/Al atomic ratios further increased from 4 to 5, there was a negative impact on the adsorption properties of zeta-potential. Also, the adsorption capacity of the catalysts for nitrate followed the order: Mg/Al = 2 < Mg/Al = 3 < Mg/Al = 5 < Mg/Al = 4. In the catalytic reduction process, the adsorbed nitrates were further reduced to nitrites that remained in the same position in catalysts, but some of superabundant nitrites were released into water as primary and unstable products. The concentration of released nitrites was in the reverse order of the adsorption capacity. The catalytic selectivity and activity of the catalysts for nitrate reduction had the same sequence as its adsorption capacity.

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Section: (8)mentioning

confidence: 99%

Role of the Mg/Al atomic ratio in hydrotalcite-supported Pd/Sn catalysts for nitrate adsorption and hydrogenation reduction

Wan¹,

Liu²,

Zhao³

et al. 2009

Journal of Colloid and Interface Science

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“…A variety of treatment procedures have been reported for the removal of excess fluoride from polluted waters based on precipitation (Aldaco et al 2007;Akbar et al 2008;Reardon and Wang 2000;Cengeloglu et al 2002;Yadav et al 2006;Nawlakhe et al 1975;Saha 1993), ion exchange (Meenakshi and Viswanathan 2007;Castel et al 2000;Feng Shen et al 2003;Chubar et al 2005;Apambire et al 1997;Singh et al 1999), reverse osmosis (Sehn 2008;Simons 1993), Donnan dialysis (Tor 2007;Garmes et al 2002;Hichour et al 1999), electrodialysis (Lahnid et al 2008;Menkouchi et al 2007;Hichour et al 2000;Adikari et al 1989;Amer et al 2001), nanofiltration ), membrane-based methods (Dieye et al 1998;Mjengera and Mkongo 2003;Lhassani et al 2001;Mameri et al 2001), electrocoagulation (Hu et al 2003), and adsorption on to various adsorbents (Shihabudheen et al 2006;Onyango et al 2006;Tripathy et al 2006;Mohapatra et al 2004;Raichur and Jyoti Basu 2001). The choice of the method depends on conditions like area, concentration, availability of resources, etc.…”

Section: Introductionmentioning

confidence: 99%

Removal of fluoride from polluted waters using active carbon derived from barks of Vitex negundo plant

2015

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Background: Deleterious effects of fluoride contamination in ground waters on the health of human beings are well known and intensive research on developing de-fluoridation methods is globally pursued. Of the various methodologies, increasing interest is being envisaged in using the adsorption methods based on active carbons derived from plant material. In the present investigation, Nitric acid activated carbon derived from barks of Vitex negundo plant (NVNC) is probed for its de-fluoridation abilities. Methods: The activated carbon is characterized adopting various physicochemical methods and surface morphological studies are carried out using FT-IR and SEM-EDX techniques. The effect of various parameters such as pH, sorbent dosage, agitation time, initial concentration of fluoride, temperature, particle size and presence of foreign ions on the extraction of the fluoride is studied adopting Batch methods.The adsorption process is analyzed with Freundlich, Langmuir, Temkin and Dubinin-Radushkevich (D-R) isotherms and kinetics of adsorption is studied using pseudo first-order, pseudo second-order, Weber and Morris intraparticle diffusion, Bangham's pore diffusion and Elovich equations. The methodology developed is applied to real ground water samples.

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“…Many natural and low cost materials such as red mud [14][15], zirconium impregnated coconut shell carbon [16][17], cashew nut shell carbon [18], ground nut shell carbon [19] and clays [20][21] have been used as adsorbents for fluoride removal from drinking water. Recently, amorphous alumina supported on carbon nanotubes [22], natural zeolites [23] chemically activated carbon [24] aligned carbon nanotubes [25], ion exchange polymeric fiber [26], double hydrous oxide of Al and Fe (Fe 2 O 3 Al 2 O 3 ·XH 2 O) [27] bone charcoal [28] and activated alumina [29] have been assayed for removing fluoride from drinking water as well as industrial wastewater. This paper concentrates on investigating low cost material for fluoride sorption which can effectively remove fluoride from aqueous solutions at a relatively low level.…”

Section: Introductionmentioning

confidence: 99%

Sorption Kinetics, Isotherm and Thermodynamic Modeling of Defluoridation of Ground Water Using Natural Adsorbents

Balouch¹,

Kolachi²,

Talpur³

et al. 2013

AJAC

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The aim of study is to investigate the removal ability of some natural adsorbents for fluoride ion from aqueous solution. The batch dynamic adsorption method was carried out at neutral pH as the functions of contact time, adsorbent dose, adsorbate concentration, temperature and effect of co-anions, which are commonly present in water. The sorption kinetics and equilibrium adsorption isotherms of fluoride on natural adsorbing materials had been investigated at aforementioned optimized. Equilibrium adsorption isotherms, viz., Freundlich and Langmuir isotherms were investigated. Lagergren and Morris-Weber kinetic equations were employed to find the rate constants. The negative enthalpy ∆H = −46. ) respectively, envisage exothermic and spontaneous nature of sorption.

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Adsorption of fluoride, chloride, bromide, and bromate ions on a novel ion exchanger

Cited by 149 publications

References 25 publications

Role of the Mg/Al atomic ratio in hydrotalcite-supported Pd/Sn catalysts for nitrate adsorption and hydrogenation reduction

Role of the Mg/Al atomic ratio in hydrotalcite-supported Pd/Sn catalysts for nitrate adsorption and hydrogenation reduction

Removal of fluoride from polluted waters using active carbon derived from barks of Vitex negundo plant

Sorption Kinetics, Isotherm and Thermodynamic Modeling of Defluoridation of Ground Water Using Natural Adsorbents

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