Analyzing topsoil heavy metal pollution sources and ecological risks around antimony mine waste sites by a joint methodology

Ecological Indicators, Год журнала: 2023, Номер 154, С. 110761 - 110761

Опубликована: Авг. 6, 2023

Studies on soil contamination caused by waste sites near antimony mining areas are scarce. For environmental protection, it is critical to investigate the levels, spatial distribution, and ecological risk assessment of heavy metals (HMs) in surface soils different land use types around identify related potential sources. In this study, pollution status, sources risks Hg, Pb, Cd, Cr, As Sb built-up areas, woodlands croplands were resolved for first time combining self-organizing maps (SOM), K-means clustering, geographic information systems (GIS) positive matrix factorization (PMF). According analysis results samples, average abundance order HMs is: > Cd Pb Cr Hg. The cumulative geological index defines as a severe level. shows that all samples above load 67.7% heavily polluted. SOM divided studied elements into three clusters combined with GIS from cluster 1, 2, Hg 3. PMF yielded metals: natural dominated (48.6%), direct accumulation represented (32.9%) mixed human activities transportation (18.5%). Ecological construction area prominent, main contribution element high risk. This study combines multiple methods current status metal environment mine slag sites, providing theoretical basis better research source control, contributing scarcity site research.

Язык: Английский

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Genome-resolved metagenomics provides insights into the ecological roles of the keystone taxa in heavy-metal-contaminated soils

Frontiers in Microbiology, Год журнала: 2023, Номер 14

Опубликована: Июль 21, 2023

Microorganisms that exhibit resistance to environmental stressors, particularly heavy metals, have the potential be used in bioremediation strategies. This study aimed explore and identify microorganisms are resistant metals soil environments as candidates for bioremediation. Metagenomic analysis was conducted using microbiome metagenomes obtained from rhizosphere of contaminated with mineral-affected soil. The resulted recovery a total 175 metagenome-assembled genomes (MAGs), 73 which were potentially representing novel taxonomic levels beyond genus level. constructed ecological network revealed presence keystone taxa, including Rhizobiaceae, Xanthobacteraceae, Burkholderiaceae , Actinomycetia . Among recovered MAGs, 50 associated these taxa. Notably, MAGs displayed an abundance genes conferring other abiotic stresses, those affiliated These found combat excessive accumulation zinc/manganese, arsenate/arsenite, chromate, nickel/cobalt, copper, tellurite. Furthermore, taxa utilize both organic inorganic energy sources, such sulfur, arsenic, carbon dioxide. Additionally, exhibited ability promote vegetation development re-vegetated mining areas through phosphorus solubilization metabolite secretion. In summary, our highlights metabolic adaptability significance microbial soils. markedly higher number related stress plant growth promotion compared non-keystone MAGs.

Язык: Английский

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The multi-media environmental behavior of heavy metals around tailings under the influence of precipitation

Ecotoxicology and Environmental Safety, Год журнала: 2023, Номер 266, С. 115541 - 115541

Опубликована: Окт. 6, 2023

Precipitation can lead to significant leaching of heavy metals from abandoned tailings，resulting in a decline the quality surrounding environment. This study aimed simulate and quantify migration patterns fate tailings caused by precipitation various environmental media (tailings, air, water, soil, sediments) using tests, source apportionment, fugacity model. Results revealed that average contents Cd, Cu, As, Pb, Zn, Cr un-weathered were 3.43, 495.56, 160.70, 138.94, 536.57, 69.52 mg/kg, respectively. The ecological risk factors as well sediments soils, following order: Cd >Cu >As >Pb >Zn >Cr. A model based on mass-balance methods was established, achieving good agreement between simulation measured values. total amounts Zn leached over 30-year evaluation period estimated be 1.09, 62.44, 0.16, 0.94, 102.12 t, Soil are important reservoirs for metals. sum storage capacities soil sediment accounted 77.28%, 75.63%, 73.94%, 69.39%, 57.80% capacity, could provide means establishment targeted pollution control plan, guide restoration projects, will aid controlling improving

Язык: Английский

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Polymer-modified bentonites with low hydraulic conductivity and improved chemical compatibility as barriers for Cu2+ containment

Acta Geotechnica, Год журнала: 2022, Номер 18(3), С. 1629 - 1649

Опубликована: Сен. 20, 2022

Язык: Английский

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Effects of vegetation restoration on distribution characteristics of heavy metals in soil in Karst plateau area of Guizhou

PeerJ, Год журнала: 2023, Номер 11, С. e15044 - e15044

Опубликована: Март 17, 2023

In southwest China, vegetation restoration is widely used in karst rocky desertification control projects. This technology can effectively fix the easily lost soil, gradually restore plant community and improve soil fertility. However, change law of heavy metals process remains to be further studied. Therefore, this work, Guizhou Caohai Nature Reserve as a typical area was taken research object investigate influence on repairing metal pollution. The spatial distribution characteristics (chromium, nickel, arsenic, zinc, lead) before after were studied by comparative analysis linear stepwise regression analysis. main influencing factors discussed. results showed that: (1) soils are affected surface vegetation, root exudates, microorganisms leaching. Only nickel (Ni) lead (Pb) tendency enrichment bottom precipitation non-karst soils. Path suggested that non-metallic such bulk density (BD), total nitrogen (TN) ammonium (NH 4 + -N) had direct effect content soil. (2) proportion 0.25–2 mm aggregates belt more than 40%, ≤2 increased 83% 88%, respectively, which could structure properties effectively. (3) Vegetation restored nutrient elements carbon enhanced material circulation. Furthermore higher 10–20 cm layer. Plant absorption, biosorption mechanism microorganisms, coupling dissolution soluble organic pH make contents Cr, Ni Pb slightly lower those At same time, coverage, residual leached runoff. reduce combined plants for extraction with remediation. study elucidates advantages remedy remediation contaminated Guizhou, activation would popularized applied other areas.

Язык: Английский

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Research on mechanical properties and mix proportion design of solid waste-based cemented paste backfill

Case Studies in Construction Materials, Год журнала: 2024, Номер 21, С. e03618 - e03618

Опубликована: Авг. 8, 2024

Язык: Английский

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Evaluating the impacts of large-scale opencast copper mining on vegetation productivity change in recent thirty years: a case study of Dexing Copper Mine

Geocarto International, Год журнала: 2025, Номер 40(1)

Опубликована: Янв. 27, 2025

Understanding the impact of mining on surrounding vegetation gross primary productivity (GPP) is crucial for ecological management areas. Using simple non-iterative clustering (SNIC) and random forest (RF) methods, we mapped Dexing Copper Mine (DCM) at a 30 m spatial resolution with Landsat data from 1991 to 2022. The photosynthesis model (VPM) was selected simulate GPP. Sens slope test Hurst exponent method jointly used reveal spatial-temporal evolution Results showed: (1) SNIC+RF more effective than RF alone. mine area expanded 5.23 km2 24.97 due deforestation; (2) GPP in 53.17% areas has significantly increased. reduction are primarily around open pit tailings; (3) Vegetation loss land cover change −2×1010 gC, −2.7×1010 −2.79×1010 gC 1991-2000, 2000-2012, 2012-2022.

Язык: Английский

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"Health risk assessment of potentially hazardous elements in mining wastes from Barite deposit (Boucaïd, western Algeria)

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138558 - 138558

Опубликована: Май 1, 2025

Язык: Английский

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Insights into ion selectivity via capacitive deionization: A critical review

Chemical Engineering Journal, Год журнала: 2025, Номер 516, С. 163806 - 163806

Опубликована: Май 20, 2025

Язык: Английский

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Heavy Metals in Soil and Plants During Revegetation of Coal Mine Spoil Tips and Surrounded Territories

Journal of Ecological Engineering, Год журнала: 2023, Номер 24(7), С. 234 - 245

Опубликована: Май 23, 2023

Coal mining in Donbas is a global problem as it causes the destabilization of ecological landscapes.Spoil tips, covering almost 52% territory, alter topography land, affect ecosystem, and decrease soil fertility.The soils become degraded are unsuitable for agricultural use.The occupation Donetsk region by Russian Federation has suspended observation research man-made influence on this which major concern scientific community.To reduce negative impact spoil necessary to slow down process pyrite oxidation formation toxic substances, well migration heavy metals due erosion.Biological reclamation with grass woody plants can help achieving goal.Another urgent issue constant supervision assessment suitability bedrock coal mines study investigated total mobile content rock samples from "South Donbaska-1" mine, ordinary chernozem (background soil), vegetation growing tip.The results showed that Co, Cr, Cu, Fe tip higher than background soils.The gradually decreases distance increases.The Pb practically same, indicating its active migration.An analysis biomass plant Zn was within limits threshold limiting values.However, other studied elements exceeded permissible norms.The provide information state be used recreational works these areas.

Язык: Английский

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