Adsorption affinity of anions on metal oxyhydroxides

Pechenyuk, S. I.; Semushina, Yu. P.; Kuz’mich, L. F.

doi:10.1134/s0036024413030205

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…Under the existence of CO 3 2– , the adsorption capacity of both samples suffers a greater loss than the situation at pH 8.0. The reason might be that the CO 3 2– , in equilibration with HCO 3 – to a much less extent at this pH, is more competitive in occupying the active sites . The increasing valence of the competing ions will also decrease the adsorption density on the adsorbent .…”

Section: Results and Discussionmentioning

confidence: 97%

“…The reason might be that the CO 3 2– , in equilibration with HCO 3 – to a much less extent at this pH, is more competitive in occupying the active sites. 35 The increasing valence of the competing ions will also decrease the adsorption density on the adsorbent. 32 The same negative effect can also be observed in the presence of SO 4 2– .…”

Section: Results and Discussionmentioning

confidence: 99%

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Enhancing the Phosphate Adsorption of a Polyallylamine Resin in Alkaline Environments by Lanthanum Oxalate Modification

Chen

et al. 2022

ACS Omega

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Sevelamer hydrochloride (SH), originally developed as an oral pharmaceutical for controlling blood phosphate levels, is a polyallylamine resin that could be used in water treatments. Although it binds phosphates effectively, its adsorption capacity suffers from a significant loss at high pH. Here, we modify SH with lanthanum oxalate to improve its phosphate adsorption in alkaline environments. With less than 6.00 wt% in La content, the composite adsorbent (SH-1C-1La) exhibits an adsorption capacity of 109.3 mg P g –1 at pH 8.0 and 100.2 mg P g –1 at pH 10.0, demonstrating significant enhancement from the original SH (86.3 mg P g –1 at pH 8.0 and 69.4 mg P g –1 at pH 10.0). Besides its high adsorption capacity and rapid adsorption kinetics, SH-1C-1La is capable of maintaining more than 78% of its capacity after four regeneration cycles, showing good durability in long-term applications. Zeta-potential measurements and XPS analysis reveal that the lanthanum oxalate species increase the surface potential to enhance the electrostatic adsorption while introducing chemical binding sites for phosphate ions. Both factors lead to the improved adsorption properties. The modification by lanthanum oxalate species might provide a new alternative for improving the phosphate adsorption properties of anion-exchange resins.

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Section: Results and Discussionmentioning

confidence: 97%

Section: Results and Discussionmentioning

confidence: 99%

Enhancing the Phosphate Adsorption of a Polyallylamine Resin in Alkaline Environments by Lanthanum Oxalate Modification

Chen

et al. 2022

ACS Omega

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“…Reagent methods in the practice of sewage treatment have both drawbacks and a number of advantages, one of which is the possibility of neutralizing acid-alkaline wastewaters of different volumes with different concentrations of heavy metal ions. The use of waste products as potential reagents can reduce the environmental hazard, partially solve the problem of creating low-waste technological systems in a certain economic region, where the waste of one production will serve as raw material for another [11][12][13][14][15][16][17].…”

Section: Discussionmentioning

confidence: 99%

The Development of a Purification Method of Sewage from Chromium (VI) by Iron-Containing Waste

Porozhnyuk

2018

SSP

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The article presents the results of reagent purification of sewage from machine building industries from chromium (VI) ions. The relevance of research is connected with the expansion of the spectrum of effective reagents at the expense of the use of industrial wastes [1-3]. The component composition of abrasive waste formed from grinding of ferrous metals with a metal content of less than 50% is studied here. Conditions have been developed for the oxidation-reduction reactions necessary in the reagent purification of sewage from chromium (VI). It is shown that purification with an efficiency of more than 80% takes place within 60 minutes.

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Gold deposition on magnetic porous composites synthesized from modified wood sawdust at different temperatures

2015

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Adsorption affinity of anions on metal oxyhydroxides

Cited by 7 publications

References 8 publications

Enhancing the Phosphate Adsorption of a Polyallylamine Resin in Alkaline Environments by Lanthanum Oxalate Modification

Enhancing the Phosphate Adsorption of a Polyallylamine Resin in Alkaline Environments by Lanthanum Oxalate Modification

The Development of a Purification Method of Sewage from Chromium (VI) by Iron-Containing Waste

Gold deposition on magnetic porous composites synthesized from modified wood sawdust at different temperatures

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