Water Air & Soil Pollution, Journal Year: 2024, Volume and Issue: 235(4)
Published: April 1, 2024
Language: Английский
Fuel, Journal Year: 2023, Volume and Issue: 350, P. 128791 - 128791
Published: June 1, 2023
Language: Английский
Citations
2
Published: Jan. 1, 2023
Lead-zinc (Pb-Zn) tailings pose a significant environmental threat due to heavy metal (HM) contamination. However, an advanced understanding of the changing characteristics HMs and evolution microbial community during revegetation process remain limited. This study investigated spatial distribution role soil communities three-year in production Pb-Zn tailings. Field sampling laboratory analysis revealed distinct enrichment patterns representative HMs, including Cr, Mn, Pb, Zn, within Prolonged stockpiling exacerbated Pb contamination, resulting increased concentrations (from 10.11 g/kg 11.53 g/kg) long-term weathering area. efforts effectively mitigated leading reduction levels (a 9.81 g/kg). Through 16S rRNA gene amplicon sequencing, Pseudomonas emerged as dominant genus area, comprising 44.17% sequences. Conversely, Thiobacillus prevailed accounting 16.64% Structural equation modeling indicated that exhibited remediation potential by transforming highly bioavailable into more stable form. provides essential evidence HM contamination dynamics revegetation, contributing development sustainable technologies for management.
Language: Английский
Citations
2
Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)
Published: Dec. 18, 2023
The paper analyzes the process of incongruent dissolution silicates taking place in close proximity to a talc mine. chemical and phase composition as well concentrations mobility potentially toxic elements (PTE) research material with varying levels weathering were determined using instrumental (XRF, XRD) methods (extractions: BCR, aqua regia, water leaching, 0.05 M EDTA). It was demonstrated that predominant minerals crust include weathering-resistant (i.e. quartz muscovite) secondary (kaolinite, illite interstratified minerals, vermiculite/chlorite) processes are hydrolysis oxidation. has an impact on complexity mineral diverse structure crust. A layer Fe Al oxides hydroxides forms upper part crust, while amount silica decreases. Low-mobility Si, Fe) react separation surface, causing formation clay vermiculite, montmorillonite) or (e.g. goethite). duration causes increase content PTEs solid materials: multifold case Cr (15), Ba (9), Pb (7), Zn (6) considerably lower V (1.3), Sr (0.8) Co (0.4). co-occur several fractions highest share their total concentration cations incorporated crystal lattice bound by strong crystalline bonds (F4 46%). lowest observed for reducible fraction (9%) oxidizable 29% most mobile connected weakest comprised only 16% concentration. Based readily soluble PTEs, it concluded degree does not environmental risk, but actually reduces Cr, Pb. obtained Ecological Risk Index (ERI) values indicate ecological risk associated tested is low entire area, which means natural do have any pollution.
Language: Английский
Citations
2
Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 9
Published: Feb. 8, 2023
Colloids of natural river water is a key intermediate carrier lead (Pb). It important to monitor the transport–transformation behavior Pb in colloidal phase seaward because this related levels pollution input and environmental risks posed sea, especially coastal delta areas. In study, fractionation distribution toxic from truly dissolved different phases seven rivers Yellow River Delta were investigated. The concentrations total Pb, 0.99–40.09 μg L –1 , 0.40–8.10 0.60–35.88 respectively. freshwater rivers, main component (about > 50%) but seawater environment (> 80%). A dramatic increase salinity causes deposition ≈94%) all forms sediment estuarine winter. However, sedimentation gradually decreases (in Shenxiangou River) when approaches (S = ≈29). industrial port (Xiaoqinghe mariculture (Yongfenghe areas, which have extensive seawater, (<15%) less affected by change salinity. This suggests that human activity contributes spread offshore environment. concentration 100 kDa–0.22 μm has postive correlation with Pb. Its variation minimally compared other components. addition, between molecular weight aromaticity chromophoric organic matter (CDOM) macromolecules will be transport carriers all, form freshwater; however, brackish estuaries, becomes carrier. Surging immobilizes region, inhibits deposition. Colloidal conversion for land–sea rivers.
Language: Английский
Citations
1
Water Air & Soil Pollution, Journal Year: 2024, Volume and Issue: 235(4)
Published: April 1, 2024
Language: Английский
Citations
0