Removal of radionuclides at a waterworks

Gäfvert, Torbjørn; Ellmark, Christoffer; Holm, E.

doi:10.1016/s0265-931x(02)00020-6

Cited by 81 publications

(34 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The selection was carried out taking into account that plants were of different geological areas and also we considered that they used different treatment processes. In particular, we analyzed the sludge from eleven potable water treatment plants (PWTP) (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13), three waste water treatment plants (WWTP) (1, 2 and 14) and an industrial water treatment plant (IWTP) (15). These sludge samples were taken from the centrifuge and water was removed by decantation.…”

Section: Samplesmentioning

confidence: 99%

See 1 more Smart Citation

Presence of Naturally Occurring Radioactive Materials in sludge samples from several Spanish water treatment plants

Palomo

Peñalver

Aguilar

et al. 2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Samplesmentioning

confidence: 99%

“…Water treatment plants (WTPs) have also been considered by some authors as NORM industries [2,10,11,12]. In fact, the incoming water treated in these plants can contain such radionuclides as radium or uranium due to the geological media in which the waters flow.…”

Section: Introductionmentioning

confidence: 99%

Presence of Naturally Occurring Radioactive Materials in sludge samples from several Spanish water treatment plants

Palomo

Peñalver

Aguilar

et al. 2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…The separation/removal of cesium ions from waste solutions generally can be achieved by means of physical-chemical treatment such as coagulation-precipitation, solvent extraction, adsorption, ion exchange and membrane processes [6][7][8]. Solvent extraction, ion exchange and membrane processes, which have been widely used, are costly and unsuitable for large-scale application [9].…”

Section: Introductionmentioning

confidence: 99%

Removal of cesium ions from waste solution using sericite incorporated into nickel hexacyanoferrate

Jeon

Cha

2015

Korean J. Chem. Eng.

View full text Add to dashboard Cite

To increase adsorption capacity and selectivity for cesium ions from waste solution, sericite was chemically modified by means of nickel hexacyanoferrate (NiHCF) with a high selectivity trap agent for cesium. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy were used for the characteristic analysis of surface onto the NiHCF-sericite. The adsorption capacity of cesium ions for the NiHCF-sericite increased about 2.5 times, as compared with natural sericite at initial pH 5.0 of waste solution. Adsorption equilibrium was investigated by Langmuir and Freundlich isotherm model, respectively. Maximum adsorption capacity was estimated as 16.583 mg/g, and the Langmuir isotherm fits the adsorption data better than Freundlich model. The adsorption process was determined as an exothermic reaction and all adsorption was completed in 30 min. In addition, the adsorption capacity of cesium ions was not greatly affected by ionic strength (~0.1 M NaCl concentration) and other metals in mixed waste solution.

show abstract

“…A major portion of the water sample was evaporated at 40-60˝C for pre-concentration. Standard ion-exchange chromatography was used to separate and purify the U and thorium fractions in the groundwater [24]. Uranium and thorium concentrations were determined from filtered 0.45 µm groundwater using high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) with a Thermo ELEMENT II model (Thermo Fisher Scientific Inc., Waltham, MA, USA) at the State Key Laboratory of Mineral Deposit Research, Nanjing University.…”

Section: Sampling and Analytical Techniquesmentioning

confidence: 99%

Uranium-Series Disequilibria in the Groundwater of the Shihongtan Sandstone-Hosted Uranium Deposit, NW China

et al. 2015

View full text Add to dashboard Cite

Uranium (U) concentration and the activities of 238 U, 234 U, and 230 Th were determined for groundwaters, spring waters, and lake water collected from the Shihongtan sandstone-hosted U ore district and in the surrounding area, NW China. The results show that the groundwaters from the oxidizing aquifer with high dissolved oxygen concentration (O 2 ) and oxidation-reduction potential (Eh) are enriched in U. The high U concentration of groundwaters may be due to the interaction between these oxidizing groundwaters and U ore bodies, which would result in U that is not in secular equilibrium. Uranium is re-precipitated as uraninite on weathered surfaces and organic material, forming localized ore bodies in the sandstone-hosted aquifer. The 234 U/ 238 U, 230 Th/ 234 U, and 230 Th/ 238 U activity ratios (ARs) for most water samples show obvious deviations from secular equilibrium (0.27-2.86), indicating the presence of water-rock/ore interactions during the last 1.7 Ma and probably longer. The 234 U/ 238 U AR generally increases with decreasing U concentrations in the groundwaters, suggesting that mixing of two water sources may occur in the aquifer. This is consistent with the fact that most of the U ore bodies in the deposit have a tabular shape originati from mixing between a relatively saline fluid and a more rapidly flowing U-bearing meteoric water.

show abstract

Removal of radionuclides at a waterworks

Cited by 81 publications

References 7 publications

Presence of Naturally Occurring Radioactive Materials in sludge samples from several Spanish water treatment plants

Presence of Naturally Occurring Radioactive Materials in sludge samples from several Spanish water treatment plants

Removal of cesium ions from waste solution using sericite incorporated into nickel hexacyanoferrate

Uranium-Series Disequilibria in the Groundwater of the Shihongtan Sandstone-Hosted Uranium Deposit, NW China

Contact Info

Product

Resources

About