Radioactive‐Strontium Removal by Lime‐Soda Softening

McCauley, Robert F.; Eliassen, Rolf

doi:10.1002/j.1551-8833.1955.tb19160.x

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…Softening with lime and soda ash has been studied and, under proper conditions, effective removals of stron-tium, barium, cadmium, yttrium, scandium, and zirconium-niobium have been obtained (9)(10)(11)(12). Removal efficiencies of 95-99 per cent or higher are possible.…”

Section: Softeningmentioning

confidence: 99%

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Removal of Radionuclides From Water by Water Treatment Processes

Morton¹,

Sträub²

1956

Journal AWWA

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Section: Softeningmentioning

confidence: 99%

“…His results are summarized in Table 8. The strontium present was reported to be removed by coprecipitation with the calcium carbonate by the mechanism of mixed crystal formation (10,12). Data on the removal of stable strontium by municipal water treatment processes, including softening, have been reported (13) and are given in Table 9.…”

Section: Softeningmentioning

confidence: 99%

Removal of Radionuclides From Water by Water Treatment Processes

Morton¹,

Sträub²

1956

Journal AWWA

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“…From previous research, we know that natural strontium will co-precipitate with calcium carbonate as an impurity in calcite precipitate [9][10][11]. Co-precipitation may occur via homogeneous crystal inclusion, or scattered crystal occlusions, or by surface adsorption [12]. The sorptive behaviour of radionuclides is similar to organic pollutants in the sense that they sorb to particulates but, being inorganic, are not subject to the same processes and mechanisms of decomposition.…”

Section: Introductionmentioning

confidence: 99%

“…In cold lime-soda softening, the formation of the calcite crystal dominates the precipitate with about 10-15% aragonite present in the crystal. In hot lime-soda softening, aragonite dominates in the precipitate [12]. Aragonite is one of the three most commonly occurring crystal forms of CaCO 3 , along with calcite and vaterite.…”

Section: Introductionmentioning

confidence: 99%

Calibration and Validation of Calcium Carbonate Precipitation Potential (CCPP) Model for Strontium Quantification in Cold Climate Aquatic Environments

Zanacic

McMartin

2022

Environments

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The ability to robustly quantify the potential for strontium precipitation and scaling in both natural surface waters and water infrastructure systems is limited. In some regions, both surface and ground water supplies contain significant concentrations of naturally occurring radionuclides, such as strontium, that can accumulate in water, soils and sediments, media, and living tissues. Methods for quantifying and predicting the potential for these occurrences are not readily available nor have they been tested and calibrated to cold region aquatic environments. Through extensive literature review, it was determined that a modified calcium carbonate precipitation potential (CCPP) model offered a scientifically credible approach to filling that knowledge gap in both the science and engineering of strontium fate and transport in water. The results from previous field and laboratory experiments were compiled to not only elucidate the fate and transport of strontium in water systems, but also to calculate the logarithmic distribution coefficient, λ, for strontium under co-precipitation conditions. Lambda (λ) is both time- and water-quality sensitive and must be measured as water mixes from source to receiving environment to determine continuous loss of Sr from the water phase. The data were collected to develop the strontium precipitation potential model that can be used in surface water quality assessment. The tool was then applied to pre-existing, publicly available, and extensive datasets for several rivers in Saskatchewan, Canada, to validate the model and produce estimates for strontium precipitation potential in those rivers.

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“…To date, several inorganic materials have been examined for the decontamination of 90 Sr from the RLW by ion exchange [1][2][3][4][5][6][7][8][9][10] and chemical precipitation routes [11,12]. Carbonate precipitation methods have advantages of simplicity and cost effectiveness in terms of operation and applicability to large treatment volumes [11][12][13][14]. The efficiency of the methods is influenced by the separation of precipitates by membrane filtration process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of carbamate-containing vaterite particles for strontium removal in wastewater treatment

Nakamura

Kasuga

Sakka

2017

Journal of Asian Ceramic Societies

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Submicron-sized particles of vaterite, containing carbamate-functionalised siloxane (V-Si), were prepared as the precipitant of radioactive strontium in the treatment of wastewater. The particles consisted of 10-22 nm-sized vaterite crystallites with preferred-orientation towards (00l) plane; a highly charged plane. The crystallites were suggested to be stabilised by the coordination of the siloxane through carbamate (NH-COO −) groups. On being soaked in the aqueous strontium chloride solution, vaterite was dissolved from V-Si to facilitate the competitive precipitation of calcian-strontianite and calcite. The particles containing a large amount of silicon exhibited the highly-controlled dissolution; the formation of calcite was suppressed to increase the strontium contents in the resulting precipitates.

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Radioactive‐Strontium Removal by Lime‐Soda Softening

Cited by 7 publications

References 2 publications

Removal of Radionuclides From Water by Water Treatment Processes

Removal of Radionuclides From Water by Water Treatment Processes

Calibration and Validation of Calcium Carbonate Precipitation Potential (CCPP) Model for Strontium Quantification in Cold Climate Aquatic Environments

Preparation of carbamate-containing vaterite particles for strontium removal in wastewater treatment

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