Effect of salinity, pressure and temperature on the solubility of smithsonite (ZnCO3) and Zn complexation in crustal and upper mantle hydrothermal fluids

Farsang, Stefan; Louvel, Marion; Rosa, Angelika Dorothea; Amboage, M.; Anzellini, Simone; Widmer, Remo N.; Redfern, Simon A. T.

doi:10.1016/j.chemgeo.2021.120320

Cited by 8 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, under acidic conditions, Cr (VI) has oxidation–reduction potential; in this chemical reaction, some of the Cr (VI) is converted to Cr (III) [ 37 , 38 ]. Cr (III) is more able to form complexes and has a relatively low solubility, which promotes its deposition [ 39 ]. These characteristics enhance Cr adsorption, and the overall performance is maintained.…”

Section: Resultsmentioning

confidence: 99%

“…After the addition of HA colloid, the concentration of Cr (III) slightly increased ( Figure 3 (H3)) because some Cr (VI) was transformed into Cr (III). As mentioned above, Cr (III) can form complexes and has relatively low solubility, promoting deposition [ 39 ]. In addition, Cr (III) often exists in the form of a Cr hydroxide precipitate, especially under neutral conditions.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Chromium Transport and Fate in Vadose Zone: Effects of Simulated Acid Rain and Colloidal Types

Zhang

Zhao

Wan

et al. 2022

IJERPH

View full text Add to dashboard Cite

Chromium (Cr) can enter groundwater through rainfall infiltration and significantly affects human health. However, the mechanisms by which soil colloids affect chromium transport are not well investigated. In this study, column experiments were conducted to simulate the chromium (Cr) transport mechanism in two typical soils (humic acid + cinnamon soil and montmorillonite + silt) in the vadose zone of a contaminated site and the effects of acid rain infiltration conditions. The results showed that Mt colloids have less influence on Cr. The fixation of Cr by colloid mainly occurs in the cinnamon soil layer containing HA colloid. The adsorption efficiency of Cr was increased by 12.8% with the addition of HA. In the HA-Cr system, the introduction of SO42− inhibited the adsorption of Cr, reducing the adsorption efficiency from 31.4% to 24.4%. The addition of Mt reduced the adsorption efficiency of Cr by 15%. In the Mt-Cr system, the introduction of SO42− had a promoting effect on Cr adsorption, with the adsorption efficiency increasing from 4.4% to 5.1%. Cr release was inhibited by 63.88% when HA colloid was present, but the inhibition owing to changes in acidity was only 14.47%. Mt colloid promotes Cr transport and increases the leaching rate by 2.64% compared to the absence of Mt. However, the effect of acidity change was not significant. Intermittent acid rain will pose a higher risk of pollutant release. Among the influencing factors, the type of colloid had the most significant influence on the efficiency of Cr leaching. This study guides the quantitative assessment of groundwater pollution risk caused by Cr in the vadose zone.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%