Influence of environmental and anthropogenic parameters on thallium oxidation state in natural waters

Campanella, Beatrice; D’Ulivo, Alessandro; Ghezzi, Lisa; Onor, Massimo; Petrini, Riccardo; Bramanti, Emilia

doi:10.1016/j.chemosphere.2017.12.155

Cited by 38 publications

(25 citation statements)

References 35 publications

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“…Tl(III) also has been observed in some aquatic environments (Campanella et al, 2017;Campanella et al, 2018) but no information about its interactions with clay minerals exists. It could be usefull to assess the potential role of those minerals in Tl(III) stability in natural waters for instance.…”

Section: Discussionmentioning

confidence: 99%

Thallium (Tl) sorption onto illite and smectite: Implications for Tl mobility in the environment

Martin

Wissocq

Benedetti

et al. 2018

Geochimica et Cosmochimica Acta

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Clay minerals play a relevant role in the transport and fate of trace elements in the environment. Though illite has been referred as an important Thallium (Tl) bearing phase in soils, mechanisms and affinity of thallium for clay minerals remain poorly known. This study investigated the sorption behavior of thallium as Tl(I) onto illite and smectite, two clay minerals occurring mainly in soils and sediments. Different sorption experiments were carried out under various pH conditions and Tl concentrations, in competition with sodium and calcium at a constant ionic strength of 0.01 mol L À1. Our results showed that illite displayed more affinity than smectite for thallium. With illite, the distribution coefficients (K d in L kg À1) varied between 10 2.75 ± 0.17 and 10 4.0 ± 0.17 in Na solutions versus between 10 2.25 ± 0.17 and 10 3.0 ± 0.17 in Ca solutions, depending on pH. With smectite, K d (in L kg À1) ranged between 10 2.50 ± 0.16 and 10 3.20 ± 0.16 and between 10 1.25 ± 0.16 and 10 1.95 ± 0.16 in Na and Ca solutions, respectively. Sorption behavior was described with the Multi-Site Ion Exchanger model and selectivity coefficients with respect to protons were calculated for the first time. In all cases, independently of clay mineral and background electrolyte, low capacity but highly reactive sites were dominant in thallium uptake, highlighting Tl affinity for those sites. Moreover, the exchangeable and reversible interactions between Tl + and clays reactive sites suggested that in changing conditions, thallium could be released in solution. The role of clay minerals in thallium environmental cycle is evident and confirmed illite to be a dominant Tl bearing phase, in some environment competing with manganese oxides. Compared to others Tl bearing mineral phases, clays are ranked as follows: MnO 2 > illite > smectite $ ferrihydrite ! Al 2 O 3 $ goethite > SiO 2. Finally, over the three monovalent cations (Tl, Rb, Cs) Tl is the one less sorbed on illite independently of the background cations.

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Section: Discussionmentioning

confidence: 99%

Thallium (Tl) sorption onto illite and smectite: Implications for Tl mobility in the environment

Martin

Wissocq

Benedetti

et al. 2018

Geochimica et Cosmochimica Acta

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“…Indeed, the apparent lack of association between DOM and Tl characterized by AF4/ICP-MS reflects the behavior of this oxidation state. Nevertheless, in acidic waters subjected to photooxidation, Tl(III) could be the predominant oxidation state of the metal (Campanella et al 2018). Therefore, ongoing studies in our laboratory are examining the relationship between Tl(III) speciation and toxicity, using a similar approach to that described in the present study.…”

Section: Thallium Speciationmentioning

confidence: 99%

The Effect of Major Ions and Dissolved Organic Matter on Complexation and Toxicity of Dissolved Thallium to Daphnia magna

Nagel

Cuss

Goss

et al. 2019

Enviro Toxic and Chemistry

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Thallium (Tl) is a trace element associated with base metal mining and processing, but little is known regarding how its toxicity is influenced by water chemistry. In the present study, the 48‐h median lethal concentration (LC50) of Tl to Daphnia magna was determined in a standard laboratory water, and toxicity was reassessed under conditions of varying cation (Ca2+, K+, Na+), anion (Cl–, HCO–3), and dissolved organic matter (DOM) concentrations. The calculated 48‐h LC50 of 1.86 mg Tl/L was consistent with previous work on Tl toxicity to D. magna. At the 48‐h LC50 concentration, changes in water chemistry had no statistically significant effect on mortality, although there was a trend toward lower Tl toxicity with elevated water K+. Test waters containing 10 mM CaCl2 did not support control survival. The measurement of Tl complexation with DOM using asymmetric flow field flow fractionation confirmed the outcomes of biogeochemical speciation modeling: Tl speciation was relatively unaffected by water chemistry, and the majority of Tl remained in the ionic form across all treatments. These data indicate that Tl toxicity is largely independent of speciation, a property that will greatly simplify risk assessments for this metal in freshwaters. Environ Toxicol Chem 2019;38:2472–2479. © 2019 SETAC

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“…pH< 4 Eh > 0.82 V in Watanabe and Takahashi, (2015)). Recent studies also highlighted the possible role of Fe(III) or As(V) in the formation of Tl(III) compounds in acid mining drainage (Karlsson et al, 2006;Campanella et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Processes driving Tl chemical speciation and mobility are well documented but some questions remain open (Twining et al, 2003;Karlsson et al,2006;Coup and Swedlund, 2015;Voegelin et al, 2015;Casiot et al, 2017;Campanella et al, 2017;Campanella et al, 2018). Its interaction with natural organic matter (NOM) is one of them (Jacobson et al, 2005a;Liu et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Effect of natural organic matter on thallium and silver speciation

Martin

Simonucci

Rad

et al. 2020

Journal of Environmental Sciences

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Natural organic matter (NOM) is known to play an important role in the transport and binding of trace metal elements in aquatic and soil systems. Thallium is a pollutant for which the extent of the role played by NOM is poorly known. Consequently, this study investigates thallium(I) and its complexation to a purified humic substance as proxy for NOM. Experiments were performed with the Donnan Membrane Technique to separate, for the first time, the free Tl + ion from its complexed form in the bulk solution. Various pH and concentrations were investigated at constant ionic strength and constant NOM proxy concentrations in solution. Experimental results were described with NICA-Donnan model. Thallium complexation was compared to silver complexation using literature data and using the same NICA-Donnan formalism. Parameters for these two cations (Tl + and Ag + ) are reported in this article, for the first time. Results display low thallium complexation to the NOM proxy while silver competes with divalent cations for the NOM binding sites. Calculated speciation for dissolved thallium highlights the dominance of free thallium (Tl + ) in solution whereas Tl-NOM complexes contribute roughly 15 % to total Tl(I) species in river and lake type waters.Similar results are obtained for soil solutions, Tl-bound to NOM < 30 % of total, from UK soils with different land use and geochemistry.

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Influence of environmental and anthropogenic parameters on thallium oxidation state in natural waters

Cited by 38 publications

References 35 publications

Thallium (Tl) sorption onto illite and smectite: Implications for Tl mobility in the environment

Thallium (Tl) sorption onto illite and smectite: Implications for Tl mobility in the environment

The Effect of Major Ions and Dissolved Organic Matter on Complexation and Toxicity of Dissolved Thallium to Daphnia magna

Effect of natural organic matter on thallium and silver speciation

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