Migration and Transformation of Heavy Metal and Its Fate in Intertidal Sediments: A Review

Processes, Год журнала: 2024, Номер 12(2), С. 311 - 311

Опубликована: Фев. 1, 2024

Intertidal sediments are rich in biological resources, which important for material circulation and energy exchange. Meanwhile, these areas can be treated as sinks well sources of coastal heavy metal pollutants. Due to the influence tide, intertidal a state periodic flooding exposure, environmental factors such dissolved oxygen, salinity overlying water pressure changeable. Heavy metals prone migration transformation with dynamic effects tidal changes environment factors, increase bioavailability metals. In this review, characteristics distribution described; behavior its influencing under conditions analyzed; mechanisms metal’s zone summarized. Moreover, bioaccumulation by organisms remediation techniques discussed. Therefore, review systematically summarizes states existence, transport mechanisms, fate sediment, fills research gap cycling zone, provides theoretical basis control pollution.

Язык: Английский

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Spatial Distribution, Risk Assessment, and Provenance of Heavy Metals Contamination in the Sediments of the Gilgit River Basin, Northern Pakistan

Soil and Sediment Contamination An International Journal, Год журнала: 2024, Номер unknown, С. 1 - 17

Опубликована: Янв. 24, 2024

Gilgit River Basin (GRB) is one of the primary fluvial aquatic systems flowing through Gilgit-Baltistan and a water source for recreation, fisheries, irrigation, drinking to more than 1.8 million people. This study aimed investigate heavy metals (HM) contamination levels in sediments GRB, northern Pakistan. Fifty-five samples were picked from various sections GRB examined HM concentrations. Fe showed maximum average concentration 27,743 mg/kg, while Cd was noted with minimum 1.06 mg/kg. concentrations within world river system guidelines except Cd, which also surpassed sediment quality set by USEPA. used geospatial ecotoxicological risk indices. Geospatial analyses higher Ishkomen GRB. low moderate exposed ecosystems. Statistical apportionment suggesting major contribution natural activities. recommends seasonal variation studies

Язык: Английский

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Removal of heavy metals in subsurface flow constructed wetlands: Application of effluent recirculation

Environmental and Sustainability Indicators, Год журнала: 2021, Номер 12, С. 100146 - 100146

Опубликована: Авг. 30, 2021

This study reports four heavy metals, i.e., Zinc (Zn), Chromium (Cr), Nickel (Ni), and Lead (Pb) removal from landfill leachate employing two-hybrid subsurface flow constructed wetland systems; each system included a vertical (VF) followed by horizontal (HF) wetland. The systems were packed with organic (coco-peat) or construction (brick, sand) materials planted Phragmites australis Chrysopogon zizanioides (Vetiver). Both operated under without, effluent recirculation protocols. Cr, Ni, Pb concentration 2–73 mg/kg, 3–12 0.00004–27 respectively in Phragmites; 8–34 3–15 0.00004–14 Vetiver. Organic carbon (C) iron (Fe) of the coco-peat, brick allowed media-based metals VF wetlands; such accumulation was not quantified sand-based HF wetlands. Zn, percentages increased between 75 98%, 29 41%, 14 48%, 23 26%, respectively, wetlands during period (compared performances without phase). Removal reduced period. Overall, ranged 20 97%, 95 99%, 55 73%, 69 83%, respectively.

Язык: Английский

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Microbial diversity in intensively farmed lake sediment contaminated by heavy metals and identification of microbial taxa bioindicators of environmental quality

Scientific Reports, Год журнала: 2022, Номер 12(1)

Опубликована: Янв. 7, 2022

Abstract The cumulative effects of anthropogenic stress on freshwater ecosystems are becoming increasingly evident and worrisome. In lake sediments contaminated by heavy metals, the composition structure microbial communities can change affect nutrient transformation biogeochemical cycling sediments. this study, bacterial archaeal under fish pressure with metals were investigated Illumina MiSeq platform. Despite similar content most in lagoon sediments, we found that their different diversity composition. This difference would be determined resilience or tolerance to metal enrichment gradient. Thirty-two phyla 66 classes identified sediment from three lagoons studied. highest percentages contribution differentiation presented Alphaproteobacteria (19.08%), Cyanophyceae (14.96%), Betaproteobacteria (9.01%) y Actinobacteria (7.55%). bacteria predominated high levels Cd As Deltaproteobacteria, Actinobacteria, Coriobacteriia, Nitrososphaeria Acidobacteria (Pomacocha), Alphaproteobacteria, Chitinophagia, Nitrospira Clostridia (Tipicocha) (Tranca Grande). Finally, results allow us expand current knowledge identify bioindicators taxa environmental quality used monitoring control contamination.

Язык: Английский

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Reconciling the geogenic and non-crustal origins of elements in an Indo-Bangla transboundary river, Atrai: Pollution status, sediment quality, and preliminary risk assessment

Environmental Research, Год журнала: 2022, Номер 214, С. 114134 - 114134

Опубликована: Авг. 20, 2022

Язык: Английский

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