The titrimetric determination of sulphate, thiosulphate and polythionates in mining effluents

Makhija, R.; Hitchen, A

doi:10.1016/s0003-2670(01)83769-7

Cited by 17 publications

(5 citation statements)

References 4 publications

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“…[441][442][443][444][445] More recently, analytical methods have been developed for analyzing the S-bearing constituents in the very small amounts of oxidation products formed on sulfide minerals. 167,190,446,465 Steger and Desjardins167 concluded that pyrite in 68% relative humidity air at 52 °C oxidizes to ferric sulfate through a thio intermediate: 2FeS2 + 302 -2FeS203 (138) FeS203 + 302 -Fe2(S04)3 + S°( 139)…”

Section: B Oxidative Dissolutionmentioning

confidence: 99%

Aqueous oxidation of pyrite by molecular oxygen

Lowson¹

1982

Chem. Rev.

555

254

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Section: B Oxidative Dissolutionmentioning

confidence: 99%

Aqueous oxidation of pyrite by molecular oxygen

Lowson¹

1982

Chem. Rev.

555

254

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“…Therefore, due to their instability, thiosalt analysis should ideally be done on-site [22]. The most commonly determined method for the total concentration of thiosalt compounds that can be conducted on-site is titration [31]. However, if the on-site analysis is not available, samples should be preserved via filtration and fast freezing in liquid nitrogen or in a mixture of acetone-alcohol and be analyzed within 7 days [22].…”

Section: Recommendationsmentioning

confidence: 99%

Challenges in the Assessment of Mining Process Water Quality

Miettinen

Bomberg

et al. 2020

Minerals

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The changes in water quality owing to recirculation of water in mineral processing plants can compromise the plant performance as well as maintenance needs. Therefore, mining process water quality assessment is becoming critical. Nevertheless, very few studies have investigated the suitability of the current analysis methodology practiced in certified laboratories for evaluating mining process water quality. This article presents two case studies to highlight the major issues encountered when performing sampling for physicochemical and chemical parameters in process water at two European mine sites using procedures from two certified laboratories. In addition, microorganisms were shown to be abundant in process waters and likely affect the mining water chemistries. However, the protocols used for microbial studies are not optimal for mining process samples, and need to be improved. The results showed difficulties in providing satisfactory results when analyzing control samples. Additionally, the analysis results presented a strong imbalance in TDS and sulfur compounds. Several potential causes associated with the poor quality of the analysis results have been outlined with a specific focus on the preservation methods. A literature review on the degradation of thiosalts suggested that the current preservation procedures are not suitable for preserving sulfur compounds. Moreover, the results indicated that the water matrix strongly influenced the validity of the chosen analysis method. In conclusion, the analysis methods should be customized for the different mining water matrix types in order to ensure the accuracy and reproducibility of the results.

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“…Sulfides can be partially oxidized during the grinding, flotation, and leaching steps of sulfide mineral ore extraction ( Liljeqvist et al, 2011 ), resulting in the production and subsequent release of sulfur oxidation intermediate compounds (SOI) from tailings streams to TIs. In addition to sulfide (ΣH 2 S), SOI commonly found in mining impacted waters include thiosulfate (S 2 O 3 2- ), tetrathionate (S 4 O 6 2- ), elemental sulfur (S 0 ), sulfite (SO 3 2- ), and a range of other polythionates (S x O y 2- ) ( Makhija and Hitchen, 1979 ; Miranda-Trevino et al, 2013 ; Whaley-Martin et al, 2020 ). The concentrations of individual SOI in TI wastewater can vary significantly spatially, seasonally, and amongst mining operations.…”

Section: Introductionmentioning

confidence: 99%

pH and thiosulfate dependent microbial sulfur oxidation strategies across diverse environments

Twible,

Whaley-Martin,

Chen

et al. 2024

Front. Microbiol.

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Sulfur oxidizing bacteria (SOB) play a key role in sulfur cycling in mine tailings impoundment (TI) waters, where sulfur concentrations are typically high. However, our understanding of SOB sulfur cycling via potential S oxidation pathways (sox, rdsr, and S4I) in these globally ubiquitous contexts, remains limited. Here, we identified TI water column SOB community composition, metagenomics derived metabolic repertoires, physicochemistry, and aqueous sulfur concentration and speciation in four Canadian base metal mine, circumneutral-alkaline TIs over four years (2016 – 2019). Identification and examination of genomes from nine SOB genera occurring in these TI waters revealed two pH partitioned, metabolically distinct groups, which differentially influenced acid generation and sulfur speciation. Complete sox (csox) dominant SOB (e.g., Halothiobacillus spp., Thiomonas spp.) drove acidity generation and S2O32- consumption via the csox pathway at lower pH (pH ~5 to ~6.5). At circumneutral pH conditions (pH ~6.5 to ~8.5), the presence of non-csox dominant SOB (hosting the incomplete sox, rdsr, and/or other S oxidation reactions; e.g. Thiobacillus spp., Sulfuriferula spp.) were associated with higher [S2O32-] and limited acidity generation. The S4I pathway part 1 (tsdA; S2O32- to S4O62-), was not constrained by pH, while S4I pathway part 2 (S4O62- disproportionation via tetH) was limited to Thiobacillus spp. and thus circumneutral pH values. Comparative analysis of low, natural (e.g., hydrothermal vents and sulfur hot springs) and high (e.g., Zn, Cu, Pb/Zn, and Ni tailings) sulfur systems literature data with these TI results, reveals a distinct TI SOB mining microbiome, characterized by elevated abundances of csox dominant SOB, likely sustained by continuous replenishment of sulfur species through tailings or mining impacted water additions. Our results indicate that under the primarily oxic conditions in these systems, S2O32- availability plays a key role in determining the dominant sulfur oxidation pathways and associated geochemical and physicochemical outcomes, highlighting the potential for biological management of mining impacted waters via pH and [S2O32-] manipulation.

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The titrimetric determination of sulphate, thiosulphate and polythionates in mining effluents

Cited by 17 publications

References 4 publications

Aqueous oxidation of pyrite by molecular oxygen

Aqueous oxidation of pyrite by molecular oxygen

Challenges in the Assessment of Mining Process Water Quality

pH and thiosulfate dependent microbial sulfur oxidation strategies across diverse environments

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