Phytoplankton may serve as a key entry for methylmercury (MeHg) into aquatic food webs however very few studies have quantified the bioconcentration of MeHg in marine phytoplankton from seawater, particularly non-diatoms. Experiments using 203Hg to measure uptake rates and concentration factors six species belonging different algal classes were conducted influence light, temperature, nutrient conditions on bioaccumulation determined. All greatly concentrated out with volume (VCFs) ranging...

Quaternized nanocellulose (QNC), synthesized in this study, showed improved removal of both short chain and long PFAS by increasing the electrostatic interactions between anionic functional groups cationic quaternary ammonium QNC.

Tunas are apex predators in marine food webs that can accumulate mercury (Hg) to high concentrations and provide more Hg (∼40%) the U.S population than any other source. We measured 1292 Atlantic bluefin tuna (ABFT, Thunnus thynnus) captured Northwest from 2004 2012. ABFT variability increased nonlinearly with length, weight, age, ranging 0.25 3.15 mg kg-1, declined significantly at a rate of 0.018 ± 0.003 kg-1 per year or 19% over an 8-year period 1990s early 2000s. Notably, this decrease...

A novel composite hydrogel bead composed of sodium alginate (SA) and aldehyde cellulose nanocrystal (DCNC) was developed for antibiotic remediation through a one-step cross-linking process in calcium chloride bath. Structural physical properties the bead, with varying composition ratios, were analyzed using techniques such as BET analysis, SEM imaging, tensile testing, rheology measurement. The optimal ratio found to be 40% 60% by weight. performance SA-DCNC evaluated doxycycline (DOXY)...

For U′r eyes only: A mixed-valence uranium silicate containing three different valence states of has been synthesized under high-temperature, high-pressure hydrothermal conditions. The structure contains sheets with uranophane anion topology that are connected by UO6 octahedra to form a 2D layered Na+ ions within and between the layers.

Methylmercury (MeHg) is known to biomagnify in marine food chains, resulting higher concentrations upper trophic level animals than their prey. To better understand how copepods, an important intermediate between phytoplankton and forage fish at the bottom of chain, assimilate release MeHg, authors performed a series laboratory experiments using gamma-emitting radiotracer 203 Hg2+ Me203 Hg with calanoid copepod Acartia tonsa. Assimilation efficiencies MeHg ranged from 25% 31% 58% 79%,...

Although 1,4-dioxane contamination of drinking water is primarily associated with historical disposal practices and unintended industrial releases, the abundant presence in personal care cleaning products subsequent releases to domestic wastewater serves as a constant source resources. Drinking from use consumer currently underappreciated, many cases unrecognized, and, result, few efforts have been dedicated understanding this ongoing issue. A U.S. states, like New York California, are...

Abstract Over the last century anthropogenic activities have rapidly increased influx of metals and metalloids entering marine environment, which can bioaccumulate biomagnify in top consumers. This may elicit sublethal effects on target organisms, having broad implications for human seafood We provide first assessment metal (Cd, Pb, Cr, Mn, Co, Cu, Zn, As, Ag, THg) metalloid (As) concentrations muscle tissue coastal sharks from The Bahamas. A total 36 individual six species were evaluated,...

Abstract Poly‐ and perfluoroalkyl substances (PFAS) are known as “forever chemicals” due to their ubiquitous persistence in the environment, negative human health effects. Among them, short‐chain PFAS of increasing concern high solubility mobility water, while possessing persistency toxicity nature like longer‐chain analogs. The most common method for removal from water is by sorption with activated carbons or ion exchange resins, but these adsorbents only exhibit limited efficiency against...

The presence and release of 1,4-dioxane to groundwater from onsite-wastewater treatment systems (OWTS), which represent 25% the total wastewater in U.S., has not been studied date. In this study we monitored six septic tank effluents (STE) receiving OWTS installed at residences on Long Island (LI), NY, for a period 15 months. We specifically evaluated performance Nitrogen Removing Biofilters (NRBs) as an innovative/alternative-OWTS, consisting top sand layer bottom woodchip/sand layer,...

Abstract An aluminum metal–organic framework (Al‐MOF), [Al(OH)(BPDC)] (DUT‐5; BPDC = Biphenyl‐4,4′‐dicarboxylate), was synthesized using solvothermal reactions. The high surface area and micropores (approximately 1.2 nm) of DUT‐5 were characterized N 2 gas sorption measurements. thermal stability its phase purity also investigated. different amounts (0.1, 0.15, 0.2 wt%) successfully incorporated into the chitosan (CS) polymer to prepare a mixed matrix membrane (MMM) for pervaporation...

Per- and polyfluoroalkyl substances (PFAS) enter the marine food web, accumulate in organisms, potentially have adverse effects on predators consumers of seafood. However, evaluations PFAS meso-to-apex predators, like sharks, are scarce. This study investigated occurrence five shark species from two ecosystems with contrasting relative human population densities, New York Bight (NYB) coastal waters The Bahamas archipelago. total detected (∑PFAS) concentrations muscle tissue ranged 1.10 to 58.5 ng g

The application of wastewater-based epidemiology to track the outbreak and prevalence coronavirus disease (COVID-19) in communities has been tested validated by several researchers across globe. However, RNA-based surveillance its inherent limitations uncertainties.

Abstract Elemental mercury (Hg 0 ) formation from other species in seawater results photoreduction and microbial activity, leading to possible evasion overlying air. Microbial conversion of monomethylmercury (MeHg) Hg remains unquantified. A rapid radioassay method was developed using gamma‐emitting 203 as a tracer evaluate production Hg(II) MeHg the low pM range. Bacterioplankton assemblages Atlantic surface Long Island Sound water were found rapidly produce , with rate constants being...