Leaching characteristics and environmental impact of heavy metals in tailings under rainfall conditions: A case study of an ion-adsorption rare earth mining area

Ecotoxicology and Environmental Safety, Год журнала: 2024, Номер 281, С. 116642 - 116642

Опубликована: Июнь 27, 2024

Following ion-adsorption rare earth mining, the residual tailings experience considerable heavy metal contamination and gradually evolve into a pollution source. Therefore, leaching characteristics environmental impact of metals in require immediate thorough investigation. This study adopted batch column experiments to investigate behaviour assess on paddy soil, thereby providing scientific basis for protection mining areas. The results showed that Mn, Zn, Pb contents were 431.67, 155.05, 264.33 mg·kg

Язык: Английский

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Evaluation of Leaching Characteristics of Heavy Metal Ions from Red Mud–Graphite Tailings

Toxics, Год журнала: 2025, Номер 13(3), С. 211 - 211

Опубликована: Март 14, 2025

The rapid growth of aluminum and graphite industries has generated substantial stockpiles red mud tailings, which pose environmental risks due to their high heavy metal content potential for soil water contamination. This study investigated the leaching behavior metals from these materials post-stabilization using cement a sulfonated oil-based ion curing agent, thereby evaluating suitability safe reuse. Semi-dynamic experiments were employed measure release, supplemented by kinetic modeling discern key mechanisms. findings indicated that concentrations in leachates consistently below regulatory standards, with dynamics influenced dual mechanisms: diffusion ions surface chemical reactions. A coefficient-based analysis further suggested low leachability indices all metals, confirming effective immobilization. These results suggest agent-stabilized mud–graphite tailing composites reduce possess characteristics favorable resource recovery, thus supporting sustainable use industrial applications.

Язык: Английский

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Durability and hardened properties of 3D printed concrete containing bauxite tailings

Materials Today Sustainability, Год журнала: 2024, Номер 25, С. 100704 - 100704

Опубликована: Фев. 5, 2024

Язык: Английский

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Biopolymer‑carbonaceous composites, progress, and adsorptive mitigation of water pollutants

International Journal of Biological Macromolecules, Год журнала: 2024, Номер 274, С. 133379 - 133379

Опубликована: Июнь 25, 2024

Язык: Английский

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Pollution, cumulative ecological risk and source apportionment of heavy metals in water bodies and river sediments near the Luanchuan molybdenum mining area in the Xiaoqinling Mountains, China

Marine Pollution Bulletin, Год журнала: 2024, Номер 205, С. 116621 - 116621

Опубликована: Июль 3, 2024

Язык: Английский

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Synthesis, characterization, and efficacy of alkali-activated materials from mine tailings: A review

Waste Management, Год журнала: 2024, Номер 191, С. 23 - 46

Опубликована: Ноя. 5, 2024

Язык: Английский

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Evaluating the impact of mine tailings wastes on the development of sustainable Ultra High Performance Fiber Reinforced concrete

Scientific Reports, Год журнала: 2025, Номер 15(1)

Опубликована: Фев. 21, 2025

The increasing demand for sustainable construction materials has led to exploring alternative resources, such as mine tailings in ultra-high-performance fiber-reinforced concrete (UHPFRC). Conventional production is associated with significant environmental impact and resource depletion, necessitating the search alternatives. This study investigates effects of incorporating powder (MTP) sand (MTS) substitutions cement quartz on mechanical durability properties UHPFRC. current focuses evaluating workability, compressive strength, indirect tensile modulus rupture, sulfate resistance, autogenous shrinkage, thermal performance, porosity, hydration kinetics, phase composition UHPFRC varying MTP MTS contents. Results indicate that optimal mix 15% 60% enhances strength by 12.49% (165.2 MPa at 90 days), reduces shrinkage 49.28% (1023 microns 180 significantly improves a residual 115.2 mass loss 25.4%. workability tests show decrease flow spread from 274 mm control 221 25% 100% MTS. Indirect increased 23.53% (23.1 rupture improved 23.04% (23.5 days) mix. Mercury intrusion Porosimetry reveals total pore volume, especially larger sizes, highest observed containing 5% 20% heat analysis shows delayed Tmax 30 h 36 MTS, indicating slower more controlled process. X-ray diffraction demonstrates reduction peak intensities, marking transition crystalline amorphous structures content. microstructural characteristics, reduced porosity enhanced stability, contribute material's long-term making it viable option practices.

Язык: Английский

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Study on the Long-Term Durability and Leaching Characteristics of Low-Consumption Cement Backfill under Different Environmental Conditions

Sustainability, Год журнала: 2024, Номер 16(12), С. 5138 - 5138

Опубликована: Июнь 17, 2024

The high consumption and cost of cement are the bottleneck problems that limit development cemented tailings backfilling technology. low-consumption backfill is immersed in a weak acid/alkaline groundwater environment for long time. Reducing can easily lead to such as sudden decrease strength leakage heavy metals. Through monolithic leaching test static uniaxial compressive tests, metals’ concentration backfills different pH soaking solutions were measured at times. Results show lower will result CTB higher rate metal leaching. Long-term exposure an acidic/alkaline instability destruction structure. A microscopic examination reveals creation hydration products improve structure’s compactness while also lowering internal porosity but solidify ions various ways. first-order reaction/diffusion model (FRDM) better evaluate behavior CTB. This study helps technology, thereby contributing sustainable mining geotechnologies.

Язык: Английский

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Chemical fractionation and risk assessment of metals in drill cuttings from onshore and offshore oil and gas wells

Marine Pollution Bulletin, Год журнала: 2025, Номер 213, С. 117635 - 117635

Опубликована: Фев. 8, 2025

Язык: Английский

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Characteristics and environmental driving factors of plant rhizosphere bacterial communities in typical lead-zinc mine tailings in Southern Guizhou

Human and Ecological Risk Assessment An International Journal, Год журнала: 2025, Номер unknown, С. 1 - 20

Опубликована: Март 2, 2025

Язык: Английский

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