Advances in Soil Amendments for Remediation of Heavy Metal-Contaminated Soils: Mechanisms, Impact, and Future Prospects

Toxics, Год журнала: 2024, Номер 12(12), С. 872 - 872

Опубликована: Ноя. 29, 2024

Heavy metal contamination is a critical factor contributing to soil degradation and poses significant environmental threats with profound implications for ecosystems human health. Soil amendments have become an effective strategy address these challenges by reducing heavy hazards remediating contaminated soils. This review offers comprehensive analysis of recent advancements in metal-contaminated soils, focus on natural, synthetic, natural-synthetic copolymer, biological amendments. By thoroughly examining contrasting their remediation mechanisms effects, this study provides detailed evaluation influence physicochemical properties, leachable content, microbial communities. Through bibliometric analysis, current research priorities trends are highlighted, offering multidimensional comparison clarifying varying applicability limitations. Furthermore, explores future prospects the inherent contamination, aiming offer valuable insights theoretical references development selection novel, efficient, multifunctional, environmentally friendly

Язык: Английский

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Dissolution of Lithium Contained in Lepidolite Using Ascorbic Acid: Kinetic and Modeling Analysis

Materials, Год журнала: 2024, Номер 17(22), С. 5447 - 5447

Опубликована: Ноя. 7, 2024

In this work, a kinetic study and modeling of the decomposition rock sample in an ascorbic acid medium with high content lepidolite phase were carried out, results which are great importance due to sample’s lithium (Li) content. The was characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES) photoelectron (XPS), mineral species detected lepidolite, at 65.3%, quartz, 30.6%, muscovite, 4.1%, quantitative chemical analysis indicating presence elements such as Li, Si, K, Na, O, Al and, lesser extent, Fe Ti; highlights that Li present 3.38%. Lithium element kinetics performed, resulting curves comprising induction period, progressive conversion stabilization; highlighted reaction progressed during first two periods, obtaining order (n) 0.4307 for period activation energy (Ea) 48.58 kJ mol−1, followed n = 0.309 Ea 25.161 mol−1. This suggested mixed control regime lower temperature ranges, transition from transport temperatures, nature concentration effect showing predominates. parameters expressions both periods obtained, calculated experimental data do not major discrepancy.

Язык: Английский

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High-Performance Composite Aerogels with CaSO₄ Whisker and Nanofiller Synthesized from Lepidolite Lithium Slag

ACS Applied Polymer Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 10, 2024

According to the chemical composition and structure properties of lepidolite lithium slag (i.e., LS), reinforcing materials were prepared improve mechanical flame retardancy poly(vinyl alcohol) (PVA)/montmorillonite (MMT) aerogels. Specifically, calcium sulfate anhydrous whiskers (CSAW) synthesized from LS rich in CaO SO3 LS-B), nanofillers obtained Al2O3 SiO2 LS-A). A densified columnar-honeycomb composite aerogels was by adding above CSAW nano LS-A. The results show that improved remarkably, peaks heat release rate, smoke production total decreased significantly with combined addition strength increased about 160%, modules 130%. fire safety also promoted significantly, i.e., peak rate 128.37 kW·m–2, cut down 3.0 times. enhancing mechanism effect LS-A on should be due formed PVA/MMT filling proportion utilized achieved more than 40%. aerogel can potentially applied retardant fields. This study is great significance for high value comprehensive utilization LS. It provides an idea improving future.

Язык: Английский

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