Ion exchange properties of strontium on in situ precipitated polyantimonic acid in amberlite XAD-7

Sivaiah, M. V.; Venkatesan, K. A.; Krishna, Rallabhandi Murali; Sasidhar, P. V. K.; Murthy, G. S.

doi:10.1016/j.seppur.2004.03.016

Cited by 20 publications

(6 citation statements)

References 13 publications

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“…Radioactive strontium is a product of nuclear fallout, and 90 Sr been regulated since 1977 due to associated health exposure concerns (USEPA, 2000). Research on the removal of radioactive strontium from drinking water had been explored by a variety of methods including sorption (Ghaemi et al, 2011, Sivaiah et al, 2005, Tel et al, 2010, Cheng et al, 2012, Gürboğa and Tel, 2005, Li et al, 2010, Merceille et al, 2012, nanofiltration (Hwang et al, 2002), and biological treatment (Paterson-Beedle et al, 2006, Thorpe et al, 2012, Achal et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Removal of strontium from drinking water by conventional treatment and lime softening in bench-scale studies

et al. 2016

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The United States Environmental Protection Agency Contaminant Candidate List 3 lists strontium as a contaminant for potential regulatory consideration in drinking water. Very limited data is available on strontium removal from drinking water and as a result, there is an immediate need for treatment information. The objective of this work is to evaluate the effectiveness of coagulation/filtration and lime-soda ash softening treatment methods to remove strontium from surface and ground waters. Coagulation/filtration jar test results on natural waters showed that conventional treatment with aluminum and iron coagulants were able to achieve only 12% and 5.9% strontium removal, while lime softening removed as high as 78% from natural strontium-containing ground water. Controlled batch experiments on synthetic water showed that strontium removal during the lime-soda ash softening was affected by pH, calcium concentration and dissolved inorganic carbon concentration. In all softening jar tests, the final strontium concentration was directly related to the initial strontium concentration and the removal of strontium was directly associated with calcium removal. Precipitated solids showed well-formed crystals or agglomerates of mixed solids, two polymorphs of calcium carbonate (vaterite and calcite), and strontianite, depending on initial water quality conditions. X-ray diffraction analysis suggested that strontium was likely incorporated in the calcium carbonate crystal lattice and was likely responsible for removal during lime softening.

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Section: Introductionmentioning

confidence: 99%

Removal of strontium from drinking water by conventional treatment and lime softening in bench-scale studies

et al. 2016

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“…It has large porosity in favour of adsorption of strontium and the thermally stability can reach up to 300°C. The rate of adsorption of strontium(II) on PAA-PAN beads is quicker than that on PAA and the maximum uptake capacity can reach up to 49 mg g -1 , which is more than 22.8 mg g -1 in Amberlite XAD-7 (PAA-XAD) [27]. Furthermore, the interfering metal ions had little effect on adsorption of strontium.…”

Section: Resultsmentioning

confidence: 99%

Preparation, characterization and ion-exchange behavior of polyantimonic acid-polyacrylonitrile (PAA–PAN) composite beads for strontium(II)

Shi

Meng

et al. 2015

J Radioanal Nucl Chem

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An organic-inorganic composite ion exchanger of polyantimonic acid-polyacrylonitrile (PAA-PAN) was synthesized to remove strontium(II) from radioactive waste water. Ion exchange behavior of the composite toward strontium(II) were investigated and the results indicated that the composite presents excellent performance in 0.1 mol L -1 nitric acid. The maximum uptake capacity of strontium(II) can reach up to 49 mg g -1 on composite. Adsorption thermodynamic parameters showed that the ion exchange was endothermic and spontaneous reaction and equilibrium adsorption data fit well with the Langmuir adsorption isotherms. In addition, PAA-PAN beads were found to have chemical and adsorption stability under irradiation and acidic media.

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“…The entropy ( S ads ) is negative corresponding to a decrease in degree of freedom of the system as the Cu(II) ions are restricted by complex formation. For the range 25-35 • C, the enthalpy ( H ads ) is positive which means an endothermic adsorption process and here the ion-exchange mechanism is likely to dominate (Table 8) [35][36][37][38]. The decrease in pH (more H + ions) upon equilibrium is higher for a temperature of 35 • C which also indicates the ion-exchange mechanism in this range (Table 9).…”

Section: Thermodynamic Studymentioning

confidence: 96%

Melamine–formaldehyde–NTA chelating gel resin: Synthesis, characterization and application for copper(II) ion removal from synthetic wastewater

Baraka

Hall

Heslop

2007

Journal of Hazardous Materials

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Ion exchange properties of strontium on in situ precipitated polyantimonic acid in amberlite XAD-7

Cited by 20 publications

References 13 publications

Removal of strontium from drinking water by conventional treatment and lime softening in bench-scale studies

Removal of strontium from drinking water by conventional treatment and lime softening in bench-scale studies

Preparation, characterization and ion-exchange behavior of polyantimonic acid-polyacrylonitrile (PAA–PAN) composite beads for strontium(II)

Melamine–formaldehyde–NTA chelating gel resin: Synthesis, characterization and application for copper(II) ion removal from synthetic wastewater

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