NADES as sustainable extraction media for emerging contaminants in marine sediments

Electrochemical induction of high performance electricity generation by novel marine electroactive Rossellomorea aquimaris MT01.

A novel antagonist of Vibrio pathogens for aquaculture: Isolation, characterization and probiotic potential of Bacillus safensis ZY-1 from marine sediments

Low diversity and potentially harmful taxa of microbial eukaryotes in chronically polluted marine sediments: the Bagnoli-Coroglio case study.

Mercury speciation and stable isotope signatures in marine sediments of Honda Bay (the Philippines) impacted by abandoned mercury mine.

Investigating the mechanism of hydrate-based CO2 sequestration in marine sediments: A large-scale experimental simulation approach

Source, distribution and environmental risk of bisphenol analogues in the marine environment: Current status and future perspectives.

Spatial patterns of microplastics in abiotic coastal matrices of the northern Oman Sea, assessed with data visualization and geostatistics.

The dynamic sink: How settling-resuspension cycles drive offshore transport of high-density microplastics.

Coastal carbon cycle and budgets are significant drivers of regional climate change, generating widespread global attention. This study explored the spatial and seasonal variability of alkalinity biogeochemistry within a coastal aquifer-aquitard system in the Pearl River Delta, China. We measured physicochemical parameters including salinity, temperature, and pH, total alkalinity (TA), stable isotopes, cations, and anions of groundwater samples, which were collected every season using permanent multilevel groundwater sampling systems installed at three field sites of PRD. Results revealed that the elevated production of total alkalinity and dissolved inorganic carbon in the deltaic aquifer-aquitard system stemmed from sedimentary organic matter due to the presence of the aquitard formed during the Holocene marine transgressive event. Cluster analysis, incorporating various components of inorganic carbon and physical-chemical features, classified sources of TA in groundwater samples into four categories: modern weathering dominated, Holocene transgression dominated, late Pleistocene weathering dominated, and early Pleistocene weathering dominated. The study suggests that Holocene marine sediments act as dynamic biogeochemical reactors, supplying organic matters and influencing carbon cycles amidst complex hydrogeological and biogeochemical conditions.

Genome-and structure-guided mechanism of carboxymethyl cellulose and straw degradation by a marine sediment bacterium Mycobacterium sp. CBM1

Geochemical characteristics of surface sediments and environmental quality assessment in the coastal zone of Hainan Island, northern South China Sea, China.

Multiscale investigation of marine sediment permeability in shallow gas-bearing zone of East China Sea

Plutonium radioisotopes in the surface bottom sediments of the Norwegian and Barents seas.

A recent minireview by J. R. A. Williams and J. F. Biddle (Appl Environ Microbiol, 92:e00275-25, 2026, https://doi.org/10.1128/aem.00275-25) substantially reframes our understanding of sedimentary viruses. For decades, viruses in marine sediments have been viewed primarily as agents of mortality, their roles largely confined to the canonical "viral shunt" paradigm developed for pelagic systems. The authors expand this perspective, positioning viruses as active participants in benthic biogeochemistry-contributing to nutrient cycling, modulating microbial diversity, and influencing organic matter processing and carbon sequestration. This conceptual shift highlights sedimentary viruses as an integral and, until now, underappreciated component of global element cycles.

Effects of emamectin benzoate spiked sediment on adult, larval and post-larval stages of the American lobster (Homarus americanus).

Large amounts of methane hydrate are trapped in natural porous media, such as marine sediments and permafrost. In this context, understanding the physical and physicochemical properties of confined methane hydrate, sometimes down to the nanoscale, is crucial for environmental and energy applications. Here, a molecular simulation strategy is employed to assess some important properties of nanoconfined methane hydrate: density, structural order parameters, thermal expansion, compressibility, and thermal conductivity. Confinement is found to affect only slightly the microscopic structure of methane hydrate close to the pore surface, with a structural ordering more pronounced than for its bulk counterpart. On the other hand, under a typical temperature and pressure range relevant to real conditions, confinement decreases the thermal expansion of methane hydrate, while it increases or decreases the isothermal compressibility depending on pressure. As for the thermal conductivity, which is determined from the anisotropic heat-flux vector using the Green-Kubo formalism, confinement increases the thermal conductivity in the tangential and normal directions with respect to the pore surface. The thermal conductivity components decomposed into acoustic and optical modes and are compared to their bulk counterpart.

Gas hydrate-based carbon capture, transport, and sequestration (GH-CCS) has emerged as a promising alternative for mitigating anthropogenic CO2 emissions. Gas hydrates selectively encapsulate CO2 within crystalline water frameworks under moderate pressure and temperature conditions, offering advantages such as solvent-free operation, high selectivity, and inherent stability for long-term storage. This review provides a comprehensive evaluation of GH-CCS across the entire process chain, including CO2 capture, transport, and sequestration. Recent advances in hydrate-based separation from fuel gas (CO2/H2) and flue gas (CO2/N2) streams are discussed, with emphasis on phase behavior, promoters, and reactor design. Developments in hydrate-based CO2 transport are examined, focusing on slurry transport, rheology, and flow assurance challenges. Sequestration strategies in marine sediments, geological formations, and permafrost regions are also reviewed, including CO2-CH4 exchange mechanisms. Key technical and economic challenges such as hydrate formation kinetics, energy requirements, scale-up feasibility, and long-term storage stability are critically assessed, and future research directions are outlined.

We present the draft genome sequence of Paenibacillus marinisediminis LHW35T isolated from marine sediment in Gangjin Bay, Republic of Korea. The genome annotation recovered 4,755 protein-coding genes and 92 RNA genes with a guanine-cytosine (GC) content of 46.5%. Subsystem analysis identified genes for ammonia assimilation, suggesting potential role in nitrogen cycling in marine sediments.

Antifouling paint particles (APPs), a form of microplastic pollution derived from the fragmentation of marine coatings, have emerged as a notable environmental concern due to their persistence and potential toxicity. However, the accurate extraction, detection, and quantification of the smallest APP size fraction (<500 μm) remain significant challenges. This study reports the development and application of a sensitive analytical method for the detection and quantification of rosin-based APPs in marine sediments using pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS). Rosin, a biobased resin derived from pine sap and widely used as a primary binder or cobinder in antifouling coatings, was targeted as a chemical marker for APPs. The method combines accelerated solvent extraction with Py-GC/MS detection of derivatized rosin pyrolysis products. Recoveries exceeded 95%. The rosin content in commercial antifouling paints varied from 14.3 to 68% (m/m), reflecting formulation differences. Application to sediments from Australian marinas revealed an average rosin concentration of 0.32 mg g-1 sediment, estimated to be 0.47-2.2 mg g-1 of APPs. While rosin serves as a tracer for APP quantification, the environmental concern primarily relates to the overall paint particles, which contain biocides and other additives. This method provides a robust approach for the trace-level quantification of APPs in complex matrices.