Transoceanic ships as a source of alien dinoflagellate invasions of inland freshwater ecosystems

Harmful Algae, Год журнала: 2024, Номер 135, С. 102630 - 102630

Опубликована: Апрель 25, 2024

Язык: Английский

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Effects of Coal Mining Activities on the Changes in Microbial Community and Geochemical Characteristics in Different Functional Zones of a Deep Underground Coal Mine

Water, Год журнала: 2024, Номер 16(13), С. 1836 - 1836

Опубликована: Июнь 27, 2024

For deep underground coal mining ecosystems, research on microbial communities and geochemical characteristics of sediments in different functional zones is lacking, resulting the knowledge zone-level mine water pollution prevention control being narrow. In this study, we surveyed distinctions five typical a representative North China coalfield, Xinjulong mine. The data indicated that compounds showed distinguishing features each zone. community richness diversity were ranked as follows: surface > rock roadways sumps ≥ goafs. Canonical Correlation Analysis (CCA), Spearman correlation co-occurrence network analysis demonstrated sensitive closely related to hydrochemical processes. distribution was not only nutrient elements (i.e., C, S, P N), but also redox-sensitive substances Fe As). When it comes control, central are With increase goaf closure time, total nitrogen (TN), organic carbon (TOC) sulfur (TS) decreased, As, phosphorus (TP) gradually increased, characteristic pollutant SO42− concentration samples decreased. Additionally, sulfate-reducing bacteria (SRB) had relatively higher proportions goafs, suggesting goafs able purify themselves. practical engineering, situ injection technology used expel oxygen create an anaerobic environment can be implemented enhance SRB reducing sulfate Meanwhile, because discharge generally discharges leaves sediment underground, pollutants transferred by strengthening relevant reactions including heavy metal solidification stabilization function bacteria.

Язык: Английский

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Environmental RNA metabarcoding for ballast water microbial diversity: Minimizing false positives

The Science of The Total Environment, Год журнала: 2024, Номер 955, С. 176902 - 176902

Опубликована: Окт. 12, 2024

Язык: Английский

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Microbial Communities in Model Seawater-Compensated Fuel Ballast Tanks: Biodegradation and Biocorrosion Stimulated by Marine Sediments

Corrosion and Materials Degradation, Год журнала: 2024, Номер 5(1), С. 1 - 26

Опубликована: Янв. 3, 2024

Some naval vessels add seawater to carbon steel fuel ballast tanks maintain stability during consumption. Marine sediments often contaminate tank fluids and have been implicated in stimulating biodegradation enhancing biocorrosion. The impact of the marine sediment was evaluated model reactors containing seawater, (petroleum-F76, Fischer–Tropsch F76, or a 1:1 mixture), coupons. Control did not receive fuel. added after 400 days incubated for another year. Sediment addition produced higher estimated bacterial numbers enhanced sulfate reduction. Ferrous sulfides were detected on all coupons, but pitting corrosion only identified coupons exposed FT-F76. Aerobic hydrocarbon-degrading bacteria increased, level dissolved iron decreased, consistent with stimulation aerobic hydrocarbon degradation by iron. We propose that provide an inoculum microbes are stimulated released corrosion. Hydrocarbon provides intermediates use sulfate-reducing reduces components inhibitory anaerobic bacteria. synergistic effect corrosion, biodegradable fuels, iron-stimulated is poorly recognized potentially significant biocorrosion mechanism.

Язык: Английский

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The prevalence of potential pathogens in ballast water and sediments of oceangoing vessels and implications for management

Environmental Research, Год журнала: 2022, Номер 218, С. 114990 - 114990

Опубликована: Дек. 2, 2022

Язык: Английский

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