Whole-Waste synthesis of Kilogram-Scale Macropores adsorbent materials for Wide-Range oil and heavy metal removal

Separation and Purification Technology, Год журнала: 2024, Номер 354, С. 128750 - 128750

Опубликована: Июль 9, 2024

Язык: Английский

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Synergistic Effects of Ozone Reaction Products and Fine Particulate Matter on Respiratory Pathophysiology in Children with Asthma

ACS ES&T Air, Год журнала: 2024, Номер 1(8), С. 918 - 926

Опубликована: Июнь 18, 2024

After being transported from outdoor to indoor environments, a large portion of ozone (O3) reacts with chemicals generate O3 reaction products. A fraction these products can partition fine particulate matter (PM2.5). Hence, we hypothesize that PM2.5 serves as carrier deliver the deep lung, leading synergistic adverse pulmonary effects. In panel study involving 43 children asthma, each was assessed 4 times (2-week interval) for biomarkers respiratory pathophysiology and personal exposures O3. We also loss exposures, calculated by taking difference between concentrations, which proportional net exposure found effects on inflammation, airway (especially lower airway) mechanics, spirometry lung function were greater at higher levels. This suggests an additional mechanism effects: predisposes be more susceptible vice versa. However, our data is limited in differentiating two potential mechanisms.

Язык: Английский

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When Does Multiphase Chemistry Influence Indoor Chemical Fate?

Environmental Science & Technology, Год журнала: 2024, Номер unknown

Опубликована: Фев. 21, 2024

Human chemical exposure often occurs indoors, where large variability in contaminant concentrations and indoor dynamics make assessments of these exposures challenging. A major source uncertainty lies the rates transformations which, due to high surface-to-volume ratios rapid air change relative gas-phase reactions are largely gas-surface multiphase processes. It remains unclear how important such chemistry is controlling lifetimes and, therefore, human both parent compounds transformation products. We present a multimedia steady-state fugacity-based model assess importance cleaning mass transfer losses, examine physicochemical properties features environment affect processes, investigate uncertainties pertaining lifetimes. find that can play an role fate indoors for reactive with low volatility, i.e., octanol-air equilibrium partitioning (Koa) above 108, impact this dependent on identity, oxidant type concentration, other parameters. This work highlights need further research into constrain chemicals built environment.

Язык: Английский

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Fast autoxidation of unsaturated lipid films on indoor surfaces

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Фев. 12, 2025

Organic films containing unsaturated lipids are widespread, yet their oxidation pathways with associated impacts on contaminant lifetimes and human exposure remain poorly explored under indoor environmental conditions. This study demonstrates that UVA radiation radical drive rapid autoxidation of thin methyl linolenate (ML) canola oil (which contains polyunsaturated triglycerides), primarily producing organic hydroperoxides. For ML this fast chemistry occurs at the same rate entirely dark, genuine conditions as it does when exposed to significantly higher •OH radicals in a flow reactor. Both detected within oxidized films, propagating dark environments minimal sensitivity initiation rate. When mixed into bisphenol A is hydroxylated, illustrating potential transformation for toxic contaminants. uncovers insights lipid processes underscores health impacts. but Here, authors demonstrate oil,

Язык: Английский

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Vegetable Oils for Material Applications – Available Biobased Compounds Seeking Their Utilities

ACS Polymers Au, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

Materials derived from natural sources are demanded for future applications due to the combination of factors such as sustainability increase and legislature requirements. The availability efficient analysis vegetable oils (triacylglycerides) open an enormous potential incorporating these compounds into various products ensure ecological footprint decreases provide advantageous properties eventual products, flexibility, toughness, or exceptional hydrophobic character. double bonds located in many centers chemical functionalization, epoxidization, hydroxylation, nucleophile substitutions using acids anhydrides. Naturally occurring castor oil comprises a reactive vacant hydroxyl group, which can be modified via numerous approaches. This comprehensive Review provides overall insight toward multiple materials utilities functionalized glycerides additive manufacturing (3D printing), polyurethane (including their recycling), coatings, adhesives. work complex list investigated studied throughout available literature describes principles each selected application.

Язык: Английский

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The chemical compositions, adhesion mechanism and cleaning performance on cooking fume fouling: an experiment and simulation study

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116580 - 116580

Опубликована: Апрель 1, 2025

Язык: Английский

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Reactive oxygen species on indoor surfaces

Environmental Science Processes & Impacts, Год журнала: 2024, Номер 26(7), С. 1198 - 1204

Опубликована: Янв. 1, 2024

Reactive oxygen species (ROS) are relatively unstable oxygen-containing radicals or non-radicals, some of which may react with tissues and biomolecules after entering the body. ROS is present in indoor aerosols, but it unclear how much that origin. Indoor surface films have been hypothesized to be a major source observed on aerosols. In this study, concentration residential surfaces was measured using xylenol orange ferrous oxidation assay wiping extraction. On genuine frequently touched by apartment occupants, >0.2 nmol cm-2; infrequently were at below detection limits. clean glass plates had deployed apartments for 6 weeks, horizontal higher concentrations than vertically oriented plates. The highest concentration, 1.3 cm-2, horizontally plate close an electric stove. To simulate dynamic unsaturated hydrocarbons surfaces, lipid mixture (SLM) dosed 19 then exposed untreated laboratory air periods ranging from 1 56 days. During first 5-6 days, increased roughly linearly maximum cm-2. Then ceased increase, perhaps because reactive sites become depleted. After 2 decreased slowly, possibly due combination volatilization, decomposition continued formation autoxidation. These field results support hypothesis can ROS.

Язык: Английский

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Commercial kitchen operations produce a diverse range of gas-phase reactive nitrogen species

Environmental Science Processes & Impacts, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Gas phase reactive nitrogen (N r ) species in a commercial kitchen are mainly composed of expected with many additional completing the budget.

Язык: Английский

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Ozone Loss on Painted Surfaces: Dependence on Relative Humidity, Aging, and Exposure to Reactive SVOCs

Environmental Science & Technology, Год журнала: 2024, Номер 58(27), С. 12073 - 12081

Опубликована: Июнь 26, 2024

Ozone and its oxidation products result in negative health effects when inhaled. Despite painted surfaces being the most abundant surface indoor spaces, loss remains one of largest uncertainties ozone budget. Here, uptake coefficients (γ

Язык: Английский

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The chemical components and adhesion performance of the oil fume fouling sourced from cooking: Experimental investigation and molecular simulation

Journal of Industrial and Engineering Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Язык: Английский

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