Future Prospects for Treating Contaminants of Emerging Concern in Water and Soils/Sediments

Neculita, Carmen Mihaela; Coudert, Lucie; Rosa, Éric; Mulligan, Catherine N.

doi:10.1007/978-3-030-29840-1_29

Cited by 4 publications

(6 citation statements)

References 62 publications

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“…Therefore, the current basic classification of CECs in mine water includes new contaminants (e.g., rare earth elements (REE), radioactive elements, Se, Mn); contaminants of emerging interest (e.g., salinity, sulfate), for which environmental contamination issues were not fully comprehended earlier; and "well-documented" contaminants (e.g., As, thiosalts, N-based compounds, xanthates, SCN − ), for which new issues (e.g., persistent aquatic toxicity) recently emerged, particularly in cold climates (at low temperature and high salinity) [7,8,15]. By their very nature, CECs are of growing concern for the mining industry.…”

Section: Figurementioning

confidence: 99%

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Active Treatment of Contaminants of Emerging Concern in Cold Mine Water Using Advanced Oxidation and Membrane-Related Processes: A Review

et al. 2021

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Responsible use and effective treatment of mine water are prerequisites of sustainable mining. The behavior of contaminants in mine water evolves in relation to the metastable characteristics of some species, changes related to the mine life cycle, and mixing processes at various scales. In cold climates, water treatment requires adaptation to site-specific conditions, including high flow rates, salinity, low temperatures, remoteness, and sensitivity of receiving waterbodies. Contaminants of emerging concern (CECs) represent a newer issue in mine water treatment. This paper reviews recent research on the challenges and opportunities related to CECs in mine water treatment, with a focus on advanced oxidation and membrane-based processes on mine sites operating in cold climates. Finally, the paper identifies research needs in mine water treatment.

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Section: Figurementioning

confidence: 99%

“…In mining, throughout history, new or emerging contaminants evolved with metallurgy challenges, scientific knowledge, and regulations [7,8]. As a result, new or CECs in mine water have specific features.…”

Section: Introduction: Contaminants Of Emerging Concern (Cecs) In Min...mentioning

confidence: 99%

Active Treatment of Contaminants of Emerging Concern in Cold Mine Water Using Advanced Oxidation and Membrane-Related Processes: A Review

et al. 2021

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“…These partially oxidized sulfur species are metastable in water and considered contaminants of emerging concern in mining. 2,3 Even though thiosalts present low direct toxicity, 4,5 the delayed acidity they entail following their complete oxidation into H 2 SO 4 adversely impacts pHsensitive mining processes and infrastructures and represents a long-term threat to ecosystems. 5,6 Thiosalts typically originate from natural oxidation of sulfides to sulfates and can be found in mine water used for ore processing or in drainage resulting from water contacting the waste rock, tailings, and other exposed mineralization zones.…”

Section: Introductionmentioning

confidence: 99%

“…Thiosulfate (S 2 O 3 2– ) is the main thiosalt, followed by trithionate (S 3 O 6 2– ) and tetrathionate (S 4 O 6 2– ). These partially oxidized sulfur species are metastable in water and considered contaminants of emerging concern in mining. , Even though thiosalts present low direct toxicity, , the delayed acidity they entail following their complete oxidation into H 2 SO 4 adversely impacts pH-sensitive mining processes and infrastructures and represents a long-term threat to ecosystems. , …”

Section: Introductionmentioning

confidence: 99%

Electro-Fenton beyond the Degradation of Organics: Treatment of Thiosalts in Contaminated Mine Water

Olvera‐Vargas

Dubuc

Wang

et al. 2021

Environ. Sci. Technol.

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Electro-Fenton (EF) is an emerging technology with well-known outstanding oxidation power; yet, its application to the treatment of inorganic contaminants has been largely disregarded. Thiosalts are contaminants of emerging concern in mine water, responsible for delayed acidity in natural waterways. In this study, EF was used to treat thiosalts in synthetic and real mine water. Thiosulfate (S 2 O 3 2− ) solutions were first used to optimize the main parameters affecting the process, namely, the current density (2.08−6.25 mA cm −2 ), temperature (4 vs 20 °C), and S 2 O 3 2− concentration (0.25−2 g L −1 ). S 2 O 3 2− was almost completely removed in 2 h of treatment at 6.25 mA cm -2 , while temperature played no important role in the process efficiency. The optimal conditions were then applied to treat a real sample of contaminated mine water, resulting in complete S 2 O 3 2− and S 4 O 6 2− oxidation to SO 4 2− in 90 min at 6.25 mA cm -2 (95% removal in only 60 min). The reaction mechanisms were investigated in detail based on the quantification of the main degradation byproducts. This study opens new possibilities for EF application to the treatment of thiosalt-contaminated mine water and other oxidizable inorganic-impacted wastewaters.

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“…Contaminants of emerging concern (CECs) are embodied by chemicals found in pharmaceuticals and personal care products (PPCPs), compounds that are considered endocrine disruptors, antibiotics, pesticides, and herbicides, among others [1][2][3][4]. The classification of CECs has also evolved with industrial development, contaminant release matrix, wastewater treatment technologies and challenges, and regulations [5,6]. CECs are also persistent and accumulative in water, and several reports have evidenced the risks of CECs for human health and the environment, even when at very low concentrations [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Progress in the design of nanoporous adsorbent materials containing transition metals for the removal of contaminants of emerging concern

Muñoz-Senmache

Fernández-Reyes

Hernández‐Maldonado

2021

Environmental Pollutants and Bioavailability

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Significant attention has been paid to contaminants of emerging concern (CECs) for several years due to their persistence in water sources and toxicity. The necessity of upgrading current wastewater treatment technologies is vital to guarantee timely remediation of CECs, particularly given the scarcity of potable water for direct human consumption and even for agricultural irrigation. In this regard, the integration of transition metals onto porous adsorbent materials for use in water and wastewater treatment operations could play a significant role due to their ability to undergo specific interactions (i.e., complexation-type) with CECs at ambient temperature. Furthermore, coupling these interactions with hydrophobicity inducing species or phases in situ (i.e. hierarchically) further enhances affinity and capacity toward CECs. This review highlights the progress so far in the bench-scale design of transition metal-based nanoporous adsorbents, including hierarchical composites prepared via confined space synthesis, for the removal of CECs from water at ambient conditions.

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Future Prospects for Treating Contaminants of Emerging Concern in Water and Soils/Sediments

Cited by 4 publications

References 62 publications

Active Treatment of Contaminants of Emerging Concern in Cold Mine Water Using Advanced Oxidation and Membrane-Related Processes: A Review

Active Treatment of Contaminants of Emerging Concern in Cold Mine Water Using Advanced Oxidation and Membrane-Related Processes: A Review

Electro-Fenton beyond the Degradation of Organics: Treatment of Thiosalts in Contaminated Mine Water

Progress in the design of nanoporous adsorbent materials containing transition metals for the removal of contaminants of emerging concern

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