废弃铅锌冶炼场地土壤和地下水重金属迁移及预测

Journal of Central South University, Год журнала: 2024, Номер 31(4), С. 1136 - 1148

Опубликована: Апрель 1, 2024

Язык: Английский

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Neglected Pathways of Heavy Metal Input into Agricultural Soil: Water–Land Migration of Heavy Metals due to Flooding Events

Water Research, Год журнала: 2024, Номер 267, С. 122469 - 122469

Опубликована: Сен. 17, 2024

Язык: Английский

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Highly effective adsorption and passivation of Cd from wastewater and soil by MgO- and Fe3O4-loaded biochar nanocomposites

Frontiers in Environmental Science, Год журнала: 2023, Номер 11

Опубликована: Авг. 9, 2023

Introduction: The application of Fe- (BC-Fe) and Mg-modified (BC-Mg) biochars for the remediation heavy-metal-contaminated soil has become a research hotspot in recent years. It is critical to select suitable biochar rejuvenation under same pollution condition. Methods: In this study, were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM). addition, adsorption passivation effects BC-Fe BC-Mg comprehensively evaluated through batch experiments incubation experiments, Cd-contaminated on plant growth also demonstrated pot experiments. Results: SEM, FTIR, XRD showed that MgO Fe 3 O 4 nanoparticles successfully loaded surface. maximum efficiencies Cd 52.63 66.23 mg g −1 , which was 9.05 7.19 times higher than original (7.32 ), respectively. Soil culture experiment 5% significantly reduced DTPA-Cd content 38.86% 50.85% at 120 days, promoted conversion acid-soluble oxidizable residual states. Pot revealed shoots maize 3.97 6.09 times, respectively, both increased dry fresh weights roots plants. Moreover, BC, BC-Fe, provided nutrients required activities dehydrogenase, urease, peroxidase. adsorption–passivation mechanism mainly included electrostatic attraction, while precipitation ion exchange. Discussion: Overall, results can be used as an efficient functional material heavy-metal remediation, study guidance selection passivator materials remediation.

Язык: Английский

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Migration of total petroleum hydrocarbon and heavy metal contaminants in the soil–groundwater interface of a petrochemical site using machine learning: impacts of convection and diffusion

RSC Advances, Год журнала: 2024, Номер 14(44), С. 32304 - 32313

Опубликована: Янв. 1, 2024

Convection and diffusion are key pathways for the migration of total petroleum hydrocarbons (TPH) heavy metals (HMs) from soil to groundwater.

Язык: Английский

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Simultaneous removal of phosphorus, zinc, and lead from oligotrophic ecosystem by iron-driven denitrification: Performance and mechanisms

Environmental Research, Год журнала: 2023, Номер 238, С. 117139 - 117139

Опубликована: Сен. 15, 2023

Язык: Английский

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Analysis of Heavy Metal Content Characteristics in Topsoil of Wasteland in the Industrial and Mining Areas of Shenmu, Shaanxi Province, China

Polish Journal of Environmental Studies, Год журнала: 2024, Номер unknown

Опубликована: Авг. 5, 2024

To assess the environmental quality of topsoil (0-20 cm) in an industrial and mining wasteland lacated a town northern Shaanxi Province, Shenmu City, over 60 soil samples were collected analyzed for presence heavy metals, including chromium (Cr), nickel (Ni), copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), lead (Pb).The degree metal contamination land was assessed using Land Accumulative Index (LAI) Potential Ecological Hazard (PERI) methods.The correlation between metals also analyzed.The study revealed that mean levels Cr, Ni, Cu, Zn, As, Cd, Pb waste areas 42.6, 19.7, 47.7, 8.6, 0.10, 21.3 mg/kg, respectively.These found to be lower than screening values pollution risk on agricultural land.The area exhibited no enrichment with limited mild these elements.However, levels.Cd posed potential ecological hazards ranging from very strong some sample sites, yet combined risks deemed small.Additionally, there highly significant positive correlations (p<0.01) Cr Ni Cu while As homology.

Язык: Английский

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As and Pb Presence within the Meoqui-Delicias Aquifer, Chihuahua, Mexico

Water, Год журнала: 2024, Номер 16(17), С. 2538 - 2538

Опубликована: Сен. 8, 2024

This study aimed to determine the amount of As and Pb in water Meoqui-Delicias’ aquifer their spatiotemporal dynamics. Twenty-one sampling points were selected. Seventeen samples from wells four surface water; two used for human consumption rest agricultural use. The taken May 2019 January 2020 events, one each climatological season year. studied geochemical anomalies seem be linked nature mechanism volcanic emplacement. Several exhibited high concentrations arsenic ranging 1.20 156.54 ppb, unlike lead, with low values being maximum value 26.32 ppb. These elements (As Pb) are Naica, part mining district where tons Au, Ag, Pb, Cu, Zn obtained. From a geographical standpoint, it is impossible establish that these related, even though present zone Au Ag historically mined.

Язык: Английский

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Quantitative source apportionment and pollution characteristics of heavy metals in agricultural soils surrounding a legacy Pb-Zn mine

Environmental Earth Sciences, Год журнала: 2024, Номер 83(21)

Опубликована: Окт. 17, 2024

Язык: Английский

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Source identification and migration fate of heavy metals of soil-groundwater system in a thousand-year cultivation region

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Март 29, 2024

Abstract Pollution of farmland by heavy metals threatens food security and human health. In addition, in soil could infiltrate into groundwater to influence the water quality safety drinking water. However, relationship between metal pollution is still not clear. this study, we investigated Guanzhong (GZ) Plain region, which a significant grain production base China, determined spatial distributions, ecological risk, sources, migration fates (As, Cd, Cr, Cu, Ni, Pb, Zn). The results showed that mean values were 19.57 mg kg –1 for As, 0.71 69.65 21.97 28.67 17.54 73.77 Zn, corresponding 1.2, 0.04, 4.69, 0.15, 0.07, 0.3, 3.6 µg L , respectively. Zn exceeded background values, Cd Pb those groundwater. Positive matrix factorization (PMF) models identified five sources ( fertilizers organic fertilizers, natural pesticides herbicides, industrial activities, sedimentation caused transportation) four (industry activity, atmospheric transportation, agriculture) particle composition carbon content important factors affected vertical distribution soil. modes found all metals. These help understand relationships ecosystems.

Язык: Английский

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Source identification and migration fate of heavy metals of soil-groundwater system in a thousand-year cultivation region

Environmental Geochemistry and Health, Год журнала: 2024, Номер 46(9)

Опубликована: Июль 29, 2024

Язык: Английский

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