Phyllosilicate mineral dissolution upon alkaline treatment under aerobic and anaerobic conditions

Pietro, Silvina A. Di; Emerson, Hilary P.; Katsenovich, Yelena; Qafoku, Nikolla P.; Szecsody, Jim E.

doi:10.1016/j.clay.2020.105520

Cited by 13 publications

(4 citation statements)

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“…The disintegration of loess under varying salt solution conditions can be attributed to water-soil chemical reactions, which are primarily influenced by the acidity and alkalinity of the salt solution [96].…”

Section: Loess Disintegration Under Different Salt Solutionsmentioning

confidence: 99%

Unraveling the Mystery of Water-Induced Loess Disintegration: A Comprehensive Review of Experimental Research

Chen,

Li,

Wang

et al. 2024

Sustainability

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Loess disintegration is a significant physicochemical and mechanical dissolution process that occurs when loess comes into contact with water. This phenomenon contributes to geological disasters such as loess cave erosion, landslides, and debris flows. The disintegration of loess can be influenced by both internal and external factors. Research on internal factors of loess disintegration has been widely recorded, but the research progress on external environmental factors that affect loess disintegration is not well summarized. This review summarizes the impacts of external water environmental factors on loess disintegration and reveals that six external water environmental factors, namely the temperature of the aqueous solution, hydrodynamic conditions, solution pH, salt concentration and type in the solution, freeze–thaw cycles, and dry–wet cycles, can significantly impact loess disintegration. Furthermore, this review delves into three key research areas in loess disintegration under the influence of these water environmental factors: experimental research on loess disintegration, the disintegration parameters used in such research and their variations, and the water–soil chemical reactions and microstructural changes during loess disintegration. It concludes that current experimental research on loess disintegration suffers from inadequate studies, with existing research associated with poor comparability and weak representativeness, and a lack of comprehensive, systematic analysis of its regularities of influence and response mechanisms from both microscopic and macroscopic perspectives. This paper can provide valuable insights for the prevention of loess geological disasters and engineering safety construction.

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Section: Loess Disintegration Under Different Salt Solutionsmentioning

confidence: 99%

Unraveling the Mystery of Water-Induced Loess Disintegration: A Comprehensive Review of Experimental Research

Chen,

Li,

Wang

et al. 2024

Sustainability

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“…The pH values, which are 7.77, 7.92, and 8.25 for the TSF1, TSF2, and TSF3 tailings, respectively, are indicative of non-acid-generating materials. Neutral to slightly alkaline pH can be related to the dissolution of neutralizing minerals such as carbonates and silicates [81]. The mechanical agitation of the suspension (liquid/solid) for 24 h shows that pH and conductivity are varying in the ranges of 3.46-3.94 and 57.3-68.9 mS/cm, respectively.…”

Section: Environmental Characterizationmentioning

confidence: 99%

Mineralurgical and Environmental Characterization of the Mine Tailings of the IOCG Mine of Guelb Moghrein, Akjoujt, Mauritania

Ba,

Souissi,

Manai

et al. 2024

Applied Sciences

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Since 2004, the processing of the iron oxide–copper–gold (IOCG) ore of Guelb Moghrein, Akjoujt, Mauritania, has resulted in the generation of approximately 40 million tons of mine tailings. The storage of these tailings poses significant environmental challenges particularly to surface and underground water resources. To address this issue, we propose an approach involving both mineralurgical and environmental characterization. Our mineralogical analysis reveals that the TSF tailings consist of sulfides and iron oxides associated with a silico-carbonated matrix. This mineralogical analysis also shows that the TSF tailings consist of secondary minerals, resulting from sulfides oxidation. Furthermore, our findings indicate that the chemical analysis of the TSF tailings contains potential toxic elements (PTEs) such as Cu, As, Co, Ni, Sb, and Se. Regarding the environmental characterization of the tailings, conducted through acid-based accounting (ABA) static tests, we demonstrate that leaching from the tailings generates a contaminated neutral drainage (CND).

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“…Clay minerals, especially kaolinite and montmorillonite, can be dissolved in an alkaline environment Bauer and Velde, 1999;Di Pietro et al, 2020;Heller-Kallai and Lapides, 2007;Lalan, 2016;Sivapullaiah and Manju, 2005;Wahid et al, 2011a;Wahid et al, 2011b;Ye et al, 2014). Indeed, for Kaolinite, the density of negatively charged −SiO − groups in the tetrahedral sheet increases when increasing the pH from 7 to 10.…”

Section: Introductionmentioning

confidence: 99%

Effects of pH and exposure time to alkaline solutions on the mineralogy of the Opalinus Clay from the lower sandy facies of Mont Terri site

Barakat

Cui²,

Mokni³

et al. 2022

Engineering Geology

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Phyllosilicate mineral dissolution upon alkaline treatment under aerobic and anaerobic conditions

Cited by 13 publications

References 50 publications

Unraveling the Mystery of Water-Induced Loess Disintegration: A Comprehensive Review of Experimental Research

Unraveling the Mystery of Water-Induced Loess Disintegration: A Comprehensive Review of Experimental Research

Mineralurgical and Environmental Characterization of the Mine Tailings of the IOCG Mine of Guelb Moghrein, Akjoujt, Mauritania

Effects of pH and exposure time to alkaline solutions on the mineralogy of the Opalinus Clay from the lower sandy facies of Mont Terri site

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