Controls on tungsten concentrations in groundwater flow systems: The role of adsorption, aquifer sediment Fe(III) oxide/oxyhydroxide content, and thiotungstate formation

Johannesson, Karen H.; Dave, Heeral B.; Mohajerin, T. Jade; Datta, Saugata

doi:10.1016/j.chemgeo.2013.05.002

Cited by 85 publications

(25 citation statements)

References 87 publications

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“…Many studies have shown that W can be toxic and carcinogenic. 41 This high concentration in TS 1 , TS 2 and TS 1 -R could be related to the important pH and the geothermal characteristics of groundwater. Waters in Grp1 are characterised by the presence of Gallium (Ga) and Germanium (Ge), characteristic trace elements of geothermal waters.…”

Section: +mentioning

confidence: 99%

Investigating regional groundwater flow systems in baja california central desert region

Ouysse¹,

Wehncke²,

Rivera³

2018

IJH

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In Northern Baja California, environmental conservation may not be fully accomplished in the absence of a clear understanding of key factors controlling and protecting biodiversity. Groundwater is an environmental agent triggering the presence of a wide range of arid ecosystems; therefore, any sustainable development in the region has to maintain a balance between environmental, social and economical benefits. The present study has placed a great emphasis on the understanding and distribution of groundwater flow systems, and their environmental interactions in the protected area of the Valle de Los Círios, using physical-chemical and isotope methods. Results show the presence of three groundwater groups portraying contrasting flow systems conditions. Analyzed samples have been classified as fresh-brackish, and thermal alkaline groundwater as suggested by pH, temperature and TDS. The Br/Cl ratio in most samples was close to the ocean molar value (1.5x10 -3 ) indicating the importance of marine aerosol fraction in the recharged waters; however, Mg/Cl,Na/Cl,Ca/Cl,SO 4 / Cl and Cl/HCO 3 +Cl ratios were significantly different to those of seawater mixing conditions. Dominant ions (Na,Ca and Cl), chemical age proxies (Li), and δ 18 O suggest waters with long residence time, with the possibility of been recharge during the late glacial period. Thermal ground water shows low minor and trace element content and exhibits the dominance of Na-plagioclase hydrolysis; their low levels of Sr and Ba suggest negligible contact with calcareous rocks and their estimated temperature at depth (80to100°C) and TDS suggest groundwater has travelled through fractured media. This introduction study suggests that desertic species in Valle de Los Cirios are highly sustained by groundwater of local and intermediate flows.

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Section: +mentioning

confidence: 99%

Investigating regional groundwater flow systems in baja california central desert region

Ouysse¹,

Wehncke²,

Rivera³

2018

IJH

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“…Adsorption on iron (Fe) (oxyhydr)oxides appears to be crucial in W(VI) retention in natural systems (Bostick et al, Submitted. ;Johannesson et al, 2013). Tungstate adsorption on such phases is believed to be strong and rapid at circumneutral pHs (Dermatas et al, 2004;Gustafsson, 2003;Johannesson et al, 2013;Xu et al, 2006).…”

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confidence: 99%

Effects of tungstate polymerization on tungsten(VI) adsorption on ferrihydrite

Sun

Bostick

2015

Chemical Geology

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Tungsten (W) is expected to adsorb to soil minerals, but does not appear to do so in many environments. To explain this behavior, adsorption experiments were performed over a variety of W(VI) solution compositions with different extents of W polymerization, on ferrihydrite. Tungsten adsorption was more extensive at circumneutral pHs and in systems with lower W(VI) concentrations, conditions under which tungstate rather than polytungstate was stable or the transformation to polytungstates was inhibited. Polytungstates are not as particle-reactive as tungstate monomers. Silicate and phosphate suppressed W(VI) adsorption. At high pHs, their impact resulted from competitive adsorption; at pH 4-7, suppressed adsorption was attributed to incorporation of tungstate into persistent polyoxometalates (POMs). Systems containing phosphotungstate (a model POM) exhibited limited adsorption initially, but adsorption increased over time as phosphotungstate depolymerized. The structure of adsorbed W(VI) was examined using X-ray absorption spectroscopy, which suggested that tungstates often represented the bulk of adsorbed W(VI), even when POMs were the primary species in solution. Many polytungstates and POMs are metastable; the slow transformations between POMs and tungstate could affect adsorption over extended periods. Adsorption kinetics data confirmed that W(VI) adsorption could take more than 2 months to reach equilibrium. The results suggest that tungstate polymerization can significantly decrease W adsorption, and thereby potentially mobilize it in the environment.

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“…This is further supported by the high (>90%) non-available residual fraction of W observed in acidic and neutral soils [10,18,58]. Johannesson et al, [59] concluded that W adsorption with mineral surface sites intensifies with increased H + and Fe concentrations in oxic, suboxic and anoxic groundwater systems. In this study, since the soil pH's are similar differing by less than 1 pH unit (6.54 to 7.49), variation in H + concentration appears to be a less important factor affecting W bioavailability in soils than Fe concentration.…”

Section: Measurement Of W In Soils Using Pz Pf and Sf Dgt'smentioning

confidence: 86%

High-resolution measurement and mapping of tungstate in waters, soils and sediments using the low-disturbance DGT sampling technique

Guan

et al. 2016

Journal of Hazardous Materials

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This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits distribution and reproduction for non-commercial purposes, provided the author and source are cited. General rightsCopyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights.Take down policy The Research Portal is Queen's institutional repository that provides access to Queen's research output. Every effort has been made to ensure that content in the Research Portal does not infringe any person's rights, or applicable UK laws. If you discover content in the Research Portal that you believe breaches copyright or violates any law, please contact openaccess@qub.ac.uk. high-resolution W profiling across sedimentwater and hotspotbulk media interfaces from Lake Taihu was obtained using PZ DGT coupled with laser ablation ICPMS measurement, and the apparent diffusion fluxes across the interfaces were calculated using a numerical model. KEY WORDS: diffusive gradients in thin-films (DGT); tungsten; precipitated zirconia (PZ) gel; sub-mm high resolution; hotspotbulk media interface.

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Controls on tungsten concentrations in groundwater flow systems: The role of adsorption, aquifer sediment Fe(III) oxide/oxyhydroxide content, and thiotungstate formation

Cited by 85 publications

References 87 publications

Investigating regional groundwater flow systems in baja california central desert region

Investigating regional groundwater flow systems in baja california central desert region

Effects of tungstate polymerization on tungsten(VI) adsorption on ferrihydrite

High-resolution measurement and mapping of tungstate in waters, soils and sediments using the low-disturbance DGT sampling technique

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