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... 3-tert-Butyl-4-hydroxyanisole (3-BHA), one of the widely used food antioxidants, has been found to act as a potential obesogen by promoting adipogenesis in vitro and inducing white adipose tissue development in vivo. Whether 3-BHA-induced visceral obesity was accompanied by a disruption of hepatic lipid homeostasis in mammals remained unclear. In this study, we evaluated the effect of 3-BHA on the ...
... The biotransformation of heavy metals in the environment is usually affected by co-existing pollutants like selenium (Se), which may lower the ecotoxicity of heavy metals, but the underlying mechanisms remain unclear. Here, we shed light on the pathways of copper (Cu²⁺) and selenite (SeO₃²–) synergistic biodetoxification by Shewanella oneidensis MR-1 and illustrate how such processes are affected ...
... Environmentally benign CeO₂–WO₃/TiO₂ catalysts are promising alternatives to commercial toxic V₂O₅–WO₃/TiO₂ for controlling NOₓ emission via selective catalytic reduction (SCR), but the insufficient catalytic activity of CeO₂–WO₃/TiO₂ catalysts is one of the obstacles in their applications because of a lack of an in-depth understanding of the CeO₂–WO₃ interactions. Herein, we design a Ce₁–W₁/TiO₂ ...
... In this study, a representative redox mediator, 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO), and its para-substituted derivatives (TEMPOs: 4-hydroxyl-TEMPO, 4-acetylamino-TEMPO, and 4-amino-TEMPO) significantly accelerated the abatement of trace organic contaminants (TrOCs, i.e., bisphenol-A (BPA), phenol, amines, and phenylbutazone) by Mn(VII) over a wide pH range of 4.0–9.0. The addition of sub ...
electrolytes; environmental science; pH; salt concentration; titration
Abstract:
... Potentiometric acid–base titration curves collected on humic (nano)particles as a function of pH and salt concentration reflect the electrostatics of the particles and the amount of chemical charges (Q) they carry. In turn, the interpretation of titration data helps quantify their reactivity toward metals provided that both intrinsic chemical and nonspecific electrostatic contributions to proton b ...
... The addition of iodide (I–) in the UV/sulfite system (UV/S) significantly accelerated the reductive degradation of perfluorosulfonates (PFSAs, CₙF₂ₙ₊₁SO₃–) and perfluorocarboxylates (PFCAs, CₙF₂ₙ₊₁COO–). Using the highly recalcitrant perfluorobutane sulfonate (C₄F₉SO₃–) as a probe, we optimized the UV/sulfite + iodide system (UV/S + I) to degrade n = 1–7 PFCAs and n = 4, 6, 8 PFSAs. In general, th ...
... Surface lattice oxygen is crucial to the degradation of volatile organic compounds (VOCs) over transition metal oxides according to the Mars–van Krevelen mechanism. Herein, λ-MnO₂ in situ grown on the surface of CoMn spinel was prepared by acid etching of corresponding spinel catalysts (CoMn-Hx-Ty) for VOC oxidation. Experimental and relevant theoretical exploration revealed that acid etching on t ...
... Bisphenols and phthalates, chemicals frequently used in plastic products, promote obesity in cell and animal models. However, these well-known metabolism-disrupting chemicals (MDCs) represent only a minute fraction of all compounds found in plastics. To gain a comprehensive understanding of plastics as a source of exposure to MDCs, we characterized the chemicals present in 34 everyday products usi ...
... The characteristics, sources, and atmospheric oxidation processes of marine aerosol proteinaceous matter (APM), including total proteins and free amino acids (FAAs), were investigated using a set of 1 year total suspended particulate (TSP) samples collected in the coastal area of Okinawa Island in the western North Pacific rim. The concentrations of APM at this site (total proteins: 0.16 ± 0.10 μg ...
... Accurate determination of acidity (pH) and ion activities in aqueous droplets is a major experimental and theoretical challenge for understanding and simulating atmospheric multiphase chemistry. Here, we develop a ratiometric Raman spectroscopy method to measure the equilibrium concentration of sulfate (SO₄²–) and bisulfate (HSO₄–) in single microdroplets levitated by aerosol optical tweezers. Thi ...
... In the western United States, the number and severity of large wildfires have been growing for decades. Biomass burning (BB) is a major source of volatile organic compounds (VOCs) to the atmosphere both globally and regionally. Following emission, BB VOCs are oxidized while being transported downwind, producing ozone, secondary organic aerosols, and secondary hazardous VOCs. In this research, we m ...
Lewis acids; adsorption; catalysts; environmental science; heavy metals; occupations; spectroscopy; technology
Abstract:
... The catalyst deactivation caused by the coexistence of alkali and heavy metals remains an obstacle for selective catalytic reduction of NOₓ with NH₃. Moreover, the copoisoning mechanism of alkali and heavy metals is still unclear. Herein, the copoisoning mechanism of K and Cd was revealed from the adsorption and variation of reaction intermediates at a molecular level through time-resolved in situ ...
... Fish swimming behavior is a commonly measured response in aquatic ecotoxicology because behavior is considered a whole organism-level effect that integrates many sensory systems. Recent advancements in animal behavior models, such as hidden Markov chain models (HMM), suggest an improved analytical approach for toxicology. Using both new and traditional approaches, we examined the sublethal effects ...
air; air pollution; chronic exposure; cohort studies; kidney diseases; land use; peripheral nervous system diseases; retinal diseases; risk; technology
Abstract:
... Little is known about the links between long-term exposure to air pollution and risk of incident microvascular disease (retinopathy, peripheral neuropathy, and chronic kidney disease). This study included 396 014 UK residents free of microvascular disease and macrovascular disease at baseline. Annual means of PM₂.₅, PM₂.₅–₁₀, PM₁₀, NO₂, and NOₓ were assessed by land use regression models for each ...
... The UK Biobank (UKBB) is a large population-based cohort that provides a unique opportunity to study the association between environmental exposure and biomarkers and to identify biomarkers as potential instruments for assessing exposure dose, health damage, and disease risks. On 462 063 participants of European ancestry, we characterized the relationship of 38 disease-relevant biomarkers, asthma ...
... Amines are frequently included in formulations of the herbicides glyphosate, 2,4-D, and dicamba to increase herbicide solubility and reduce herbicide volatilization by producing herbicide–amine salts. Amines, which typically have higher vapor pressures than the corresponding herbicides, could potentially volatilize from these salts and enter the atmosphere, where they may impact atmospheric chemis ...
... During proteinaceous waste valorization to produce volatile fatty acids (VFAs), protein needs to be hydrolyzed to amino acids (AAs), but the effects of the configuration of AAs on their biotransformation and VFA production have not been investigated. In this study, more residual d-AAs than their corresponding l-AAs were observed after VFAs were produced from kitchen waste in a pilot-scale bioreact ...
... Selective catalytic ammonia-to-dinitrogen oxidation (NH₃-SCO) is highly promising for the abatement of NH₃ emissions from flue gas purification devices. However, there is still a lack of high-performance and cost-effective NH₃-SCO catalysts for real applications. Here, highly dispersed, electron-deficient Cu-based catalysts were fabricated using nitrogen-doped carbon nanotubes (NCNT) as support. I ...
air quality; ammonia; corn; farm size; fertilizer application; nitrogen fertilizers; rice; sustainable agriculture; technology; wheat; China
Abstract:
... Farm size affects nitrogen fertilizer input and agricultural practices, which are key determinants of ammonia (NH₃) emissions from croplands. However, the degree to which NH₃ emissions are associated with changes in farm size is not well understood yet despite its crucial role in achieving agricultural sustainability in China, where agricultural production is still dominated by smallholder farms. ...
aerosols; air pollution; ammonium chloride; capital; light intensity; liquids; technology; water content; water vapor; India
Abstract:
... The interaction between water vapor and atmospheric aerosol leads to enhancement in aerosol water content, which facilitates haze development, but its concentrations, sources, and impacts remain largely unknown in polluted urban environments. Here, we show that the Indian capital, Delhi, which tops the list of polluted capital cities, also experiences the highest aerosol water yet reported worldwi ...
... Environmental DNA (eDNA) analysis holds great promise as an efficient and noninvasive method to monitor not only the distribution of organisms but also their spawning activity. In eDNA analysis-based monitoring of spawning activity, the detection of sperm-derived eDNA is a key point; however, its characteristics and dynamics are completely unknown. The present study focuses on the persistence and ...
... Per- and polyfluoroalkyl substances (PFASs) are ubiquitous environmental contaminants that have been linked to adverse health effects in wildlife and humans. Here, we report the presence of PFASs in Eurasian otters (Lutra lutra) in England and Wales and their association with anthropogenic sources. The following 15 compounds were analyzed: 10 perfluoroalkyl carboxylic acids (PFCAs), 4 perfluoroalk ...
... Sulfate (SO₄²–) is a major species in atmospheric fine particles (PM₂.₅), inducing haze formation and influencing Earth’s climate. In this study, the δ³⁴S values in PM₂.₅ sulfate (δ³⁴S-SO₄²–) were measured in Hangzhou, east China, from 2015 September to 2016 October. The result showed that the δ³⁴S-SO₄²– values varied from 1.6 to 6.4‰ with the higher values in the winter. The estimated fractionati ...
... The extensive and increasing global use of antibiotics results in the ubiquitous presence of antibiotics in the environment, which has made them “pseudo persistent organic contaminants.” Despite numerous studies showing wide adverse effects of antibiotics on organisms, the chronic environmental risk of their exposure is unknown, and the molecular and cellular mechanisms of antibiotic toxicity rema ...
antibiotic resistance; evolution; health effects assessments; human health; humans; municipal wastewater; quality control; surface water; surveys; technology; water utilities
Abstract:
... Antimicrobial resistance (AMR) is a grand societal challenge with important dimensions in the water environment that contribute to its evolution and spread. Environmental monitoring could provide vital information for mitigating the spread of AMR; this includes assessing antibiotic resistance genes (ARGs) circulating among human populations, identifying key hotspots for evolution and dissemination ...
... Recent progress in 3D X-ray microscopy allows the analysis of coated gasoline particulate filters on a detailed pore-scale level. However, derivable detailed three-dimensional models for filter simulation are not applicable under transient driving conditions of automotive aftertreatment systems due to their inherent complexity. Here, we present a novel concept to utilize highly resolved 3D X-ray m ...
... Membrane technologies using reverse osmosis (RO) and nanofiltration (NF) have been widely implemented in water purification and desalination processes. Separation between species at the molecular level is achievable in RO and NF membranes due to a complex and poorly understood combination of transport mechanisms that have attracted the attention of researchers within and beyond the membrane commun ...
... Biomass burning (BB) releases large quantities of phenols (ArOH), which can partition into cloud/fog drops and aerosol liquid water (ALW), react, and form aqueous secondary organic aerosol (aqSOA). While simple phenols are too volatile to significantly partition into particle water, highly substituted ArOH partition more strongly and might be important sources of aqSOA in ALW. To investigate this, ...
aromatic compounds; coal; coconuts; databases; environmental science; mass spectrometry; most probable number technique; organic matter; peat; permafrost; rivers
Abstract:
... Natural organic matter (NOM) components measured with ultrahigh-resolution mass spectrometry (UHRMS) are often assessed by molecular formula-based indices, particularly related to their aromaticity, which are further used as proxies to explain biogeochemical reactivity. An aromaticity index (AI) is calculated mostly with respect to carboxylic groups abundant in NOM. Here, we propose a new constrai ...
... California’s dairy sector accounts for ∼50% of anthropogenic CH₄ emissions in the state’s greenhouse gas (GHG) emission inventory. Although California dairy facilities’ location and herd size vary over time, atmospheric inverse modeling studies rely on decade-old facility-scale geospatial information. For the first time, we apply artificial intelligence (AI) to aerial imagery to estimate dairy CH₄ ...
Daphnia magna; antipredatory behavior; body length; eyes; fish; freshwater crustaceans; instars; kairomones; life tables; lighting; pollution; reproduction; sexual maturity; tail; zooplankton
Abstract:
... Artificial light at night (ALAN) dramatically alters the natural daily cycle of light and may cause a suite of physiological and behavioral responses of freshwater crustacean Daphnia. Here, we conducted a life table experiment to investigate the effect of different wavelengths [white (L-L, 400–800 nm), red (R, 614 nm), green (G, 527 nm), and blue (B, 447 nm)] and flashing modes [three colors flash ...
... The Paris metropolitan area, the largest urban region in the European Union, has experienced two national COVID-19 confinements in 2020 with different levels of restrictions on mobility and economic activity, which caused reductions in CO₂ emissions. To quantify the timing and magnitude of daily emission reductions during the two lockdowns, we used continuous atmospheric CO₂ monitoring, a new high ...
air quality; biomass; carbon; cooking stoves; heating systems; India
Abstract:
... We conducted indoor air quality (IAQ) measurements during a multiyear cookstove randomized control trial in two rural areas in northern and southern India. A total of 1205 days of kitchen PM₂.₅ were measured in control and intervention households during six ∼3 month long measurement periods across two study locations. Stoves used included traditional solid fuel (TSF), improved biomass, and liquefi ...
... The environmental mobility of Cu and therefore its potential toxicity are closely linked to its attachment to natural organic matter (NOM). Geochemical models assume full lability of metals bound to NOM, especially under strong oxidizing conditions, which often leads to an overestimation of the lability of soil metals. Stable isotope dilution (SID) has been successfully applied to estimate the lab ...
... 22 alkylated polycyclic aromatic hydrocarbons (alk-PAHs) were characterized in ambient air individually for the first time in urban and semi-urban locations in Toronto, Canada. Five unsubstituted PAHs were included for comparison. Results from the measurements were used to estimate benzo[a]pyrene equivalent toxicity (BaPeq) of individual compounds in order to investigate the significance of a sing ...
... Methods for identifying origin, movement, and foraging areas of animals are essential for understanding ecosystem connectivity, nutrient flows, and other ecological processes. Telemetric methods can provide detailed spatial coverage but are limited to a minimum body size of specimen for tagging. In recent years, stable isotopes have been increasingly used to track animal migration by linking lands ...
Thi Minh Hong Nguyen; Jennifer Bräunig; Rai S. Kookana; Sarit L. Kaserzon; Emma R. Knight; Hoang Nhat Phong Vo; Shervin Kabiri; Divina A. Navarro; Charles Grimison; Nicole Riddell; Christopher P. Higgins; Michael J. McLaughlin; Jochen F. Mueller
... This study investigated the mobilization of a wide range of per- and polyfluoroalkyl substances (PFASs) present in aqueous film-forming foams (AFFFs) in water-saturated soils through one-dimensional (1-D) column experiments with a view to assessing the feasibility of their remediation by soil desorption and washing. Results indicated that sorption/desorption of most of the shorter-carbon-chain PFA ...
Daniel Dawson; Hunter Fisher; Abigail E. Noble; Qingyu Meng; Anne Cooper Doherty; Yuko Sakano; Daniel Vallero; Rogelio Tornero-Velez; Elaine A. Cohen Hubal
United States Environmental Protection Agency; byproducts; environmental protection; human health; humans; industrial wastes; people; risk; technology; water pollution
Abstract:
... 1,4-Dioxane is a persistent and mobile organic chemical that has been found by the United States Environmental Protection Agency (USEPA) to be an unreasonable risk to human health in some occupational contexts. 1,4-Dioxane is released into the environment as industrial waste and occurs in some personal-care products as an unintended byproduct. However, limited exposure assessments have been conduc ...
... Exposure to polychlorinated biphenyls (PCBs) and their hydroxylated metabolites (OH-PCBs) has been implicated in neurodevelopmental disorders. However, the distribution of PCBs and OH-PCBs in the human brain has not been characterized. This study investigated the age-, sex-, and brain region-specific distribution of all 209 PCBs using gaschromatography–tandem mass spectrometry (GC–MS/MS) in neonat ...
acute toxicity; animals; chemical hazards; environmental science; species diversity; technology
Abstract:
... New approach methods are being developed to address the challenges of reducing animal testing and assessing risks to the diversity of species in aquatic environments for the multitude of chemicals with minimal toxicity data. The toxicity-normalized species sensitivity distribution (SSDn) approach is a novel method for developing compound-specific hazard concentrations using data for toxicologicall ...
... The association between daily all-cause mortality and short-term fine particulate matter (PM₂.₅) exposure is well established in the literature. However, association between acute exposure to PM₂.₅ chemical species and mortality is not well known, especially in developing countries like India. Here we examined associations between mortality and acute exposure to PM₂.₅ mass concentration and their ...
Bayesian theory; Chinese people; blood; blood lipids; elderly; environmental science; hyperlipidemia; low density lipoprotein cholesterol; particulates; questionnaires; surveys; technology; titanium
Abstract:
... Dyslipidemia may be a potential mechanism linking fine particulate matter (PM₂.₅) to adverse cardiovascular outcomes. However, inconsistent associations between PM₂.₅ and blood lipids have resulted from the existing research, and the joint effect of PM₂.₅ elemental constituents on blood lipid profiles remains unclear. We aimed to explore the overall associations between PM₂.₅ elemental constituent ...
ammonium; birth weight; carbon; confidence interval; environmental science; gestational age; large for gestational age; national surveys; nitrates; odds ratio; particulates; pregnancy; regression analysis; risk; satellites; small for gestational age; sulfates; China
Abstract:
... This study examined the associations of fine particulate matter (PM₂.₅) and its chemical constituents with risks of small for gestational age (SGA) and large for gestational age (LGA). Based on the China Labor and Delivery Survey, we included 70,206 birth records from 24 provinces in China. Concentrations of PM₂.₅ mass and six main constituents were estimated using satellite-based models. Logistic ...
air pollution; apolipoprotein B; blood serum; calcium; chronic exposure; elderly; magnesium; metabolic syndrome; particulates; regression analysis; risk; sulfates; technology; China
Abstract:
... Fine particulate matter (PM₂.₅) was reported to be associated with metabolic syndrome (MetS), but how PM₂.₅ constituents affect MetS and the underlying mediators remains unclear. We aimed to investigate the associations of long-term exposure to 24 kinds of PM₂.₅ constituents with MetS (defined by five indicators) in middle-aged and elderly adults and to further explore the potential mediating role ...
brackish water; citrates; cyanides; desalination; electric potential difference; electrochemistry; energy efficiency; environmental science; freshwater; infrastructure; power generation; solar energy
Abstract:
... Electrochemical separation offers an energy-efficient means to desalinate brackish water, a relatively untapped but increasingly utilized water source for freshwater supply. Several electrochemical techniques are being developed to enable low-energy desalination combined with energy storage. We report a new approach that produced a peak power density of 6.0 mW cm–² from the energy stored in iron c ...
... Iron (Fe), molybdenum (Mo), and vanadium (V) are the main components of the three known biological nitrogenases, which constrain nitrogen fixation and affect ecosystem productivity. Atmospheric deposition is an important pathway of these trace metals into ecosystems. Here, we explored the deposition flux, spatiotemporal pattern, and influencing factors of atmospheric wet Fe, Mo, and V deposition b ...
... Phytoremediation is a potentially cost-effective and environmentally friendly remediation method for environmental pollution. However, the safe treatment and resource utilization of harvested biomass has become a limitation in practical applications. To address this, a novel manganese-carbon-based single-atom catalyst (SAC) method has been developed based on the pyrolysis of a manganese hyperaccum ...
... Isocyanic acid (HNCO) and other nitrogen-containing volatile chemicals (organic isocyanates, hydrogen cyanide, nitriles, amines, amides) were measured during the House Observation of Microbial and Environmental Chemistry (HOMEChem) campaign. The indoor HNCO mean mixing ratio was 0.14 ± 0.30 ppb (range 0.012–6.1 ppb), higher than outdoor levels (mean 0.026 ± 0.15 ppb). From the month-long study, co ...
... The application of anammox technology in low-strength wastewater treatment is still challenging due to unstable nitrite (NO₂––N) generation. Partial denitrification (PD) of nitrate (NO₃––N) reduction ending with NO₂––N provides a promising solution. However, little is known about the feasibility of accelerating nitrogen removal toward the practical application of anammox combined with heterotrophi ...