Removal of nitrate from aqueous solution by nitrate selective ion exchange resins

Samatya, Saba; Kabay, Nalan; Yüksel, Ümran; Arda, Müşerref; Yüksel, Mithat

doi:10.1016/j.reactfunctpolym.2006.03.009

Cited by 398 publications

(180 citation statements)

References 25 publications

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“…Available methods for nitrate removal include physicochemical processes [4,5] and biological denitrification [6,7]. However, physico-chemical processes, such as ionexchange, reverse osmosis and electrodialysis, produce concentrated brine that must be treated or disposed of, and biological denitrification of drinking water is limited due to concerns with pathogens, turbidity, and chlorine demand in the treated water.…”

Section: Introductionmentioning

confidence: 99%

Efficient Nitrate Reduction in a Fluidized Electrochemical Reactor Promoted by Pd–Sn/AC Particles

Lan

Liu

et al. 2015

Catal Lett

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Pd-Sn modified activated carbon (Pd-Sn/AC) was prepared by impregnation of Pd and Sn salts onto AC followed by heat treatment. Based on scanning electron microscopy, transmission electron microscopy, and X-ray diffraction analysis, Pd-Sn alloy was highly dispersed on the surface of AC with a atomic ratio of about 4.21. A double electrolysis cell was established and separated via a proton-exchange membrane. In the cathodic cell compartment, the as-prepared Pd-Sn/AC was used as particle electrodes where electrolytic reduction of nitrate was performed. A batch mode study showed that at an applied current of 30 mA with 7.5 g/L catalyst, over 90 % of the nitrate could be reduced in 80 min when the nitrate initial concentration was 24.6 mg/L. The electro-catalytic process of nitrate reduction could be satisfactorily described with a first-order kinetics model. With increasing applied current, the nitrate removal rate increased; whereas, the NH 4 ? concentration increased as well. The inhibition effect of coexisting anions and cations on nitrate reduction followed this order:

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Section: Introductionmentioning

confidence: 99%

Efficient Nitrate Reduction in a Fluidized Electrochemical Reactor Promoted by Pd–Sn/AC Particles

Lan

Liu

et al. 2015

Catal Lett

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“…Since nitrate has a deleterious effect on human health and environment, processes for nitrate removal have gained attention in recent years (Kleinjans et al, 1991;Nolan et al, 1997). The conventional treatment methods used to remove nitrate are reverse osmosis (RO) (Brigita et al, 2009), ion exchange (IE) (Samatya et al, 2006), catalytic (Prüsse et al, 2000;Florence et al, 2001;Wan et al, 2009a) and biological (Anabela et al, 2000;Lucas et al, 2005;Liu and Koenig, 2002;Rezania et al, 2007) processes. There are some disadvantages with these methods that limit their application.…”

Section: Introductionmentioning

confidence: 99%

Study of a combined sulfur autotrophic with proton-exchange membrane electrodialytic denitrification technology: Sulfate control and pH balance

Wan

Liu

et al. 2011

Bioresource Technology

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“…There is a wide range of technologies to remove nitrate from water including physical-chemical [4][5][6], biological [7][8][9], and catalytic processes [10][11][12][13][14][15][16][17][18]. Conventional physical-chemical techniques such as ion-exchange, reverse osmosis, and sorption processes cannot convert nitrate into harmless compounds but only remove nitrate from water to brine which afterward needs treatment.…”

Section: Introductionmentioning

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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Removal of nitrate from aqueous solution by nitrate selective ion exchange resins

Cited by 398 publications

References 25 publications

Efficient Nitrate Reduction in a Fluidized Electrochemical Reactor Promoted by Pd–Sn/AC Particles

Efficient Nitrate Reduction in a Fluidized Electrochemical Reactor Promoted by Pd–Sn/AC Particles

Study of a combined sulfur autotrophic with proton-exchange membrane electrodialytic denitrification technology: Sulfate control and pH balance

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

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