Levels of potentially toxic and essential elements in Tocantins River sediment: health risks at Brazil’s Savanna-Amazon interface

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Авг. 4, 2024

Abstract The field study aims to address identified research gaps by providing valuable information on the concentration, spatial distribution, pollution levels, and source apportionment of toxic essential elements in sediment samples from four sampling sites (P1: Beira Rio (urban area), P2: Bananal (rural P3: Embiral P4: Cidelândia area) distributed along middle Tocantins River, Brazil. Samples were collected 2023 river sections analyzed using various contamination índices (geoaccumulation index, factor, enrichment load potential ecological risk coefficients, integrated index). Results indicated that levels aluminum, iron, manganese, selenium exceeded legal standards year. Chromium, nickel, copper, zinc, lead guidelines, mainly section P1 for aluminum P3 nickel lead. Rainy months showed increased presence, indicating seasonal variability. geoaccumulation index low with notably present near urban industrial areas. factor highlighted elevated concentrations zinc Both PLI SPI indices raise concerns regarding Pb (P4) Zn (P3) at specific times Overall, risks deemed most sites. Continuous monitoring interventions are crucial preserve water environmental quality region.

Язык: Английский

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Suppression of phosphorus release from sediment by Vallisneria natans combined with iron- and zirconium-modified bentonites: Effectiveness, mechanism and response of sedimentary microbial communities

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(5), С. 113690 - 113690

Опубликована: Июль 29, 2024

Язык: Английский

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Phosphorus immobilization/release behavior of lanthanum-modified bentonite amended sediment under the dual effects of pH and dissolved organic carbon

Chemosphere, Год журнала: 2024, Номер 358, С. 142221 - 142221

Опубликована: Май 1, 2024

Язык: Английский

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Interception of internal phosphorus release from sediments by lanthanum-modified shrimp shell biochar in two application modes

Journal of Cleaner Production, Год журнала: 2024, Номер 471, С. 143450 - 143450

Опубликована: Авг. 23, 2024

Язык: Английский

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Integrated benefits of Ca/Al composites capping coupled with Vallisneria natans: Removal sediment phosphorus and optimization the different microbial functions of sediment and leaf biofilm

Journal of Water Process Engineering, Год журнала: 2025, Номер 75, С. 107960 - 107960

Опубликована: Май 19, 2025

Язык: Английский

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Control of phosphorus release from sediment by the combined use of Elodea nuttallii, hydrous ferric oxide, zeolite and calcite: Efficiency, mechanism and response of bacterial communities

Journal of Environmental Sciences, Год журнала: 2024, Номер 152, С. 122 - 141

Опубликована: Май 6, 2024

Язык: Английский

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Multi-scale analysis of nutrient and environmental dynamics in Hongfeng Lake Southwest China

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Окт. 23, 2024

Traditional linear correlation analysis may not fully capture the true relationship between these variables. Therefore, multi-scale running analysis, such as time-dependent intrinsic (TDIC) and continuous wavelet transform based on Hilbert-Huang (HHT), provides valuable insights into local correlations evolving nutrients environmental factors over time. In this study, we investigated seven four water quality nutrient indicators in deep lakes Yungui Plateau southwestern China. The results revealed that there be strong levels during certain periods, while opposite trends emerge at other times. These variations could attributed to uncertain physical processes, spatial heterogeneity, or impact of different climatic hydrological processes. Wavelet indicated changes lag behind those levels, particularly a cycle about 12 months. This suggests align with natural patterns after body has been polluted. conclusions underscore complexity dynamic nature bodies, highlighting importance employing advanced techniques complexity.

Язык: Английский

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Synchronous control of nitrogen and phosphorus release from sediments in shallow lakes under wind disturbance by modified zeolite and Ca/Al-based sludge combination

Environmental Research, Год журнала: 2024, Номер 264, С. 120448 - 120448

Опубликована: Ноя. 23, 2024

Язык: Английский

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Control of phosphorus release from sediment by hydrous zirconium oxide/magnesium hydroxide composite: Effectiveness, mechanism and microbial response

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(3), С. 113082 - 113082

Опубликована: Май 15, 2024

Язык: Английский

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Blocking endogenous phosphorus release in sediments by a hydrotalcite mixture synthesized with natural sepiolite and discarded cans

Applied Clay Science, Год журнала: 2024, Номер 261, С. 107599 - 107599

Опубликована: Окт. 17, 2024

Язык: Английский

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