Enhancing uranium solubilization in soils by citrate, EDTA, and EDDS chelating amendments

Prieto, Carlos; Lozano, J.C.; Rodríguez, P. Blanco; Tomé, F. Vera

doi:10.1016/j.jhazmat.2011.10.026

Cited by 47 publications

(21 citation statements)

References 39 publications

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“…For example, citrate and other ligands have been shown to cause desorption and solubilization and thus, mobilize uranium (Kantar and Honeyman, 2006;Lozano et al, 2011;Read et al, 1998). Overall, from the baseline conditions to the systems with 50 mgC/L, this decrease in uranium sorption is experimentally confirmed and is most apparent in the 50 mgC/L samples at the highest ligand to uranium ratios (i.e.…”

Section: Uraniummentioning

confidence: 72%

The influence of citrate and oxalate on 99TcVII, Cs, NpV and UVI sorption to a Savannah River Site soil

Montgomery

Barber

Edayilam

et al. 2017

Journal of Environmental Radioactivity

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Batch sorption experiments were conducted with 0.5-50 ppb Tc,Cs, Np and U in the presence and absence of citrate and/or oxalate in a 25 g/L Savannah River Site (SRS) soil suspension. Citrate and oxalate were the ligands of choice due to their relevancy to plant exudates, the nuclides were selected for their wide range of biogeochemical behavior, and the soil from SRS was selected as a model Department of Energy (DOE) site soil. Batch samples were continually mixed on a rotary shaker and maintained at a pH of approximately 5. Analysis via ICP-MS indicated that sorption ofNp increased with ligand concentration compared to baseline studies, as did sorption of Tc although to a lesser extent. The increased sorption ofNp is proposed to be due to a combination of factors that are dependent on the ligand(s) present in the specific system including, ligand dissolution of the soil by citrate and formation of tertiary soil-oxalate-Np complexes. The increased Tc sorption is attributed to the dissolution of the soil by the ligands, leading to an increase in the number of available sorption sites forTc. Uranium sorption decreased and dissolution of native uranium was also observed with increasing ligand concentration, thought to be a result of the formation of strong U-ligand complexes remaining in the aqueous phase. The majority of these effects were observed at the highest ligand concentrations of 50 mg/L. No notable changes were observed for the Cs system which is ascribed to the minimal interaction of Cs with these organic ligands.

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Section: Uraniummentioning

confidence: 72%

The influence of citrate and oxalate on 99TcVII, Cs, NpV and UVI sorption to a Savannah River Site soil

Montgomery

Barber

Edayilam

et al. 2017

Journal of Environmental Radioactivity

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“…Allen et al (1996) showed that, in the pH range 2-4, the uranyl ion formed a 2:2 dimeric species with tartrate, malate, or citrate ligands. Many authors (Ebbs et al, 1998;Lozano et al, 2011;Soudek et al, 2011a,b;Vera Tomé et al, 2009) tested the influence of citric acid on uranium uptake. They confirmed increased transfer of uranium from roots to upper parts of B. oleracea and S. alba in the presence of tartaric acid.…”

Section: Resultsmentioning

confidence: 99%

Uranium uptake in Nicotiana sp. under hydroponic conditions

Soudek

Buzek

Lhotský

et al. 2014

Journal of Geochemical Exploration

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“…토양으로부터 식물로의 중금속 전이는 토양의 pH, 산화/환원 환경 등에 의존적이며, 다른 중금 al., 1999), 특히 킬레이트제 첨가는 식물이 중금속을 흡착 하고 전이하기 위한 중금속 용해도와 생물활성도를 증가 시키는 것으로 알려져 있다 (Schmidt, 2003 (Lasat, 1998), 납은 EDTA(Ethylene Diamine Tetracetic Acid: C 10 H 16 N 2 O 8 ) (Kumar, 1995;Huang and Cunningham, 1996), 그리고 우라늄은 구연산 을 사용하여 토양 내 우라늄의 용해도와 생물활성도를 증 가시킬 수 있는 것으로 알려져 있다 (Lozano et al, 2011, Han et al, 2014. Thayalakumaran Lee and Kim, 1972).…”

Section: 서 론 식물추출법(Phytoextraction)은 식물의 전이 기작을 이용 하여 토양으로부터 중금속을 식물 unclassified

The Investigation for the Effects of Citric Acid on the Uranium Transfer into the Plants by the Pilot Scale Feasibility Test

Han¹,

Lee²

2016

Journal of Soil and Groundwater Environment

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The field feasibility tests for a phytoextraction process were performed to identify the effect of citric acid as a chelate on the uranium (U) transfer into the plant for the naturally U contaminated soil in Duckpyeongri, Korea. For the feasibility tests, lettuce and Chinese cabbage were cultivated for 49 days on four testing grounds (1 m × 1 m × 0.5 m in each) in 2016. The citric acid solution was added to two testing grounds (one for lettuce and the other for Chinese cabbage) increasing the U transfer in two crop plants and their results were compared to those without the citric acid solution. When without the citric acid solution, the U concentration of plant after the cultivation was low (< 45 µg/kg for leaves and < 450 µg/kg for roots). However, with the addition of 50 mM citric acid solution, the U concentration of lettuce leaves and roots increased by 24 times and 1.8 times, and the U concentration of Chinese cabbage leaves and roots increased by 86.7 times and 5.4 times. The absolute accumulated U amount (µg) in lettuce and Chinese cabbage also increased by 8.7 times and 50 times, compared to those without citric acid solution. Less than 8% of the U amount of exchangeable/carbonate phases was removed by using the lettuce and Chinese cabbage when the citric acid solution was not applied. However 52% and 66% of the U amount in exchangeable/carbonate phases were removed by the lettuce and the Chinese cabbage when the citric acid solution was added. The effect of the citric acid on the U transfer capability into the plants was quantitatively investigated by the field feasibility test, suggesting that U existing as exchangeable/carbonate phase in soil can be successfully removed by the phytoextraction process using Chinese cabbage with citric acid.

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Enhancing uranium solubilization in soils by citrate, EDTA, and EDDS chelating amendments

Cited by 47 publications

References 39 publications

The influence of citrate and oxalate on 99TcVII, Cs, NpV and UVI sorption to a Savannah River Site soil

The influence of citrate and oxalate on 99TcVII, Cs, NpV and UVI sorption to a Savannah River Site soil

Uranium uptake in Nicotiana sp. under hydroponic conditions

The Investigation for the Effects of Citric Acid on the Uranium Transfer into the Plants by the Pilot Scale Feasibility Test

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