Determination and interpretation of environmental water samples contaminated by uranium mining activities

Meinrath, G.; Volke, P.; Helling, Charles S.; Dudel, E. Gert; Merkel, Broder J.

doi:10.1007/s002160051323

Cited by 52 publications

(18 citation statements)

References 2 publications

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“…Desorption experiments were conducted in a 0.1 M Na 2 CO 3 solution for 14 h. Analysis for U was performed after reduction to U(IV) with the ArsenazoIII method (detection limit: 25 µg/L). [40,41] Analysis for dissolved ferrous iron and total iron was determined using FerroVer iron reagent (HACH DR/2000 Spectrophotometer Handbook, Loveland, CO). The experiments were performed in triplicates.…”

Section: Fixation Experiments Desorption With Na 2 Co 3 and Analyticmentioning

confidence: 99%

Mechanism of uranium removal from the aqueous solution by elemental iron

Noubactep¹,

Schöner

Meinrath

2006

Journal of Hazardous Materials

124

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The effectiveness of elemental iron (Fe 0 ) to remove uranium (U) from the aqueous phase has been demonstrated. While the mitigation effect is sure, discrepancies in the removal mechanism have been reported. The objective of this study was to investigate the mechanism of U(VI) removal from aqueous phases by Fe 0 . For this purpose a systematic sequence of bulk experiments was conducted to characterize the effects of the availability and the abundance of corrosion products on U(VI) removal. Results indicated that U(VI) removal reactions did not primary occur at the surface of the metallic iron. It is determined that U(VI) co-precipitation with aging corrosion products is a plausible explanation for the irreversible fixation under experimental conditions. Results of XRD analyses did no show any U phases, whereas SEM-EDX analyses showed that U tended to associate with rusted areas on the surface of Fe 0 .Recovering U with different leaching solutions varied upon the dissolution capacity of the individual solutions for corrosion products, showing that the irreversibility of the removal 2 depends on the stability of the corrosion products. U(VI) co-precipitation as removal mechanism enables a better discussion of reported discrepancies.

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Section: Fixation Experiments Desorption With Na 2 Co 3 and Analyticmentioning

confidence: 99%

Mechanism of uranium removal from the aqueous solution by elemental iron

Noubactep¹,

Schöner

Meinrath

2006

Journal of Hazardous Materials

124

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“…[26] Analysis for uranium was performed after reduction to U(IV) with the Asernazo III method. [27,28] Uranium was tested as redox-labile pollutant, that may be reduced by ZVI from soluble U(VI) species to less soluble U(IV) phases. In general, the solubility of U(IV) phases is lower than that of U(VI) phases and U(IV) phases are stable over a wider range of pH.…”

Section: Uranium Removal Experimentsmentioning

confidence: 99%

Testing the Suitability of Zerovalent Iron Materials for Reactive Walls

et al. 2005

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Environmental ContextGroundwater remediation is mostly a costly long-term process. In-situ remediation by permeable reactive barriers is a potential solution. For pollution by various redox sensitive contaminants, zerovalent iron (ZVI) has been proposed to immobilise or degrade dissolved pollutants in groundwater. Scrap iron materials are considered as an effective low-cost ZVI material. Due to the wide variation of scrap metal compositions, testing methods for characterising the corrosion behaviour need to be developed. AbstractZerovalent iron (ZVI) has been proposed as reactive material in permeable in-situ walls for contaminated groundwater. An economically feasible ZVI reactive wall requires cheap but efficient iron materials. From an uranium treatability study and results of iron dissolution in 0.002 M EDTA by five selected ZVI materials, it is shown that current research and field implementation is not based on a rational selection of application-specific iron metal sources.An experimental procedure is proposed which could enable a better material characterization.This procedure consists in mixing ZVI materials and reactive additives including contaminant 2 releasing materials (CRM) in long term batch experiments and characterise the contaminant concentration over the time.

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“…Uranium measurements in ground water have been carried out globally in the recent past [7][8][9][10][11]. In the present study we have employed solid-state nuclear track detectors (SSNTDs) for the microanalysis of uranium content in environmental samples taken from some areas of Punjab state, India.…”

Section: Introductionmentioning

confidence: 99%

Uranium concentration in drinking water samples using the SSNTDs

Singh

et al. 2009

Indian J Phys

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Uranium concentrations in the drinking water samples collected mainly from hand pumps along the Amritsar to Bathinda track are presented. Uranium concentration values in these samples show a wide range of variation depending upon different factors like source, location, depth and local geology etc. The observed uranium content in water samples has been found to be varying from 0.9 ± 0.08 to 63 ± 0.21 ppb and even the radon activity in ground water observed in our earlier survey carried out in this area has been found to be increasing from Amritsar towards Bathinda. The higher values were observed from the ground water samples particularly of the areas falling in belt from Zira to Maur towards the Haryana border. The values observed at certain locations are found to be higher than the highest recommended value of 15 ppb [1]. The high uranium concentration observed particularly in certain areas along this track can be attributed due to interaction of ground water with the soil formation of this region and the local subsurface geology of the region.

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Determination and interpretation of environmental water samples contaminated by uranium mining activities

Cited by 52 publications

References 2 publications

Mechanism of uranium removal from the aqueous solution by elemental iron

Mechanism of uranium removal from the aqueous solution by elemental iron

Testing the Suitability of Zerovalent Iron Materials for Reactive Walls

Uranium concentration in drinking water samples using the SSNTDs

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