Directional deep oxidation of toluene via phenolized pathway—A review concerning dominant factors involved in photocatalysis

Frontiers of Environmental Science & Engineering, Journal Year: 2025, Volume and Issue: 19(2)

Published: Jan. 2, 2025

Language: Английский

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Catalytic oxidation and mixed oxidation of ethyl acetate: A review

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 343, P. 126980 - 126980

Published: March 4, 2024

Language: Английский

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Contribution and Mechanisms of BVOCs Emitted From a Typical Large Lake With Algal Bloom to O₃ Levels in Lakeside Urban Areas

Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(4)

Published: Feb. 24, 2025

Abstract Lakes near developed cities often experience algal blooms due to eutrophication, leading odor and biogenic emissions that can potentially interfere with the formation of air pollutants such as O 3 around these lakes. However, impact its pathways remain poorly understood. This study investigates contributions volatile organic compound (BVOC) from Lake Taihu in surrounding regions using a numerical approach. Composite analysis, case studies, process analysis reveal BVOC increase hourly near‐surface concentrations, maximum rise 25.5 μg m −3 , improving model performance. The influence lake is large on northwest side Taihu, primarily determined by spatial emission patterns dominant wind fields. development planetary boundary layer, particularly thermal internal enhanced breeze play important roles increasing levels over land, whereas variations temperature minor role. Vertical cross‐sections show interactions between land‐lake breezes background fields are critical for transport, surface concentrations areas. Additionally, intensify both daytime nighttime gas‐phase chemical consuming nitrates producing additional within lower troposphere. highlights importance local circulations pollution, emphasizing need comprehensive pollution control strategies lakeside cities.

Language: Английский

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Volatile Organic Compounds Emission Characteristics and Factors from Stage-Dependent Combustion in Typical Biomass Stoves in Northern China: Field Measurements and Environmental Implications

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126008 - 126008

Published: March 1, 2025

Language: Английский

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Evidence for sustainably reducing secondary pollutants in a typical industrial city in China: Co-benefit from controlling sources with high reduction potential beyond industrial process

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 478, P. 135556 - 135556

Published: Aug. 22, 2024

Language: Английский

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Volatile organic compounds in typical coal chemical industrial park in China and their environmental and health impacts

Atmospheric Environment, Journal Year: 2024, Volume and Issue: unknown, P. 120825 - 120825

Published: Sept. 1, 2024

Language: Английский

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Characterization of Voc Emissions from a Typical Coal Chemical Industrial Park in China: Implication of Environmental and Health Impacts

Published: Jan. 1, 2024

The coal chemical industry produces a large amount of volatile organic compounds (VOCs), and the emission characteristics associated impact on environment health residents are still unclear. This study determined VOC concentrations compositions in Jinjie Coal Chemical Industry Park which is located northern China. average total measured VOCs (TVOCs) industrial areas summer winter were 231.5 103.2 μg/m3, higher than those residential (123.7 70.3 μg/m3), respectively. Aromatics, carbonyls, alkanes dominant classes areas, while halocarbons, alkenes had where not only affected by emissions also other anthropogenic sources. Formaldehyde, ethylene, m/p-xylene prevailing contributors to ozone formation potential (OFP), aromatics (e.g., m/p-xylene, o-xylene, ethylbenzene) showed largest contribution secondary aerosol (SOA) both seasons. Using source apportionment method, gasoline production, coking emission, fuel combustion, solvent coating, vehicle exhaust five major areas. With reliable estimations aspects, exposures acrolein formaldehyde posed highest non-carcinogenic carcinogenic risks, results demonstrated that substantial environmental co-benefits could be achieved reducing from process, diesel-fueled vehicles Park. Prioritizing establishment efficient air pollution measures tightening standards, especially for hazardous VOCs, recommended according findings valuable work.

Language: Английский

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EcoAI Forecast: Multi - Model Air Quality Prediction in Patancheru

Published: April 17, 2024

In the face of escalating air pollution in Patancheru, Hyderabad, 'EcoAI Forecast' project presents a pioneering approach. It transcends limitations traditional linear models, which fail to effectively map intricacies quality fluctuations. This research introduces comprehensive multi-model machine learning framework, integrating sophisticated algorithms like LSTM (Long Short-Term Memory), GRU (Gated Recurrent Unit), CNN (Convolutional Neural Network), and an Ensemble model. These models are adept at processing complex environmental datasets, particularly focusing on nuanced prediction PM2.5 levels, crucial pollutant. Utilizing dataset enriched with hourly measurements, study illustrates paradigm shift from conventional methodologies more dynamic, data-driven techniques. The model, centerpiece this research, demonstrates exceptional performance, achieving RMSE (Root Mean Square Error) 0.068 R2 (Coefficient Determination) 0.945. metrics not only signify substantial improvement over but also underscore model's precision forecasting quality. success paves way for future advancements monitoring, exemplifying transformative potential advanced techniques urban public health preservation.

Language: Английский

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Spatial–Temporal Characteristics, Source Apportionment, and Health Risks of Atmospheric Volatile Organic Compounds in China: A Comprehensive Review

Toxics, Journal Year: 2024, Volume and Issue: 12(11), P. 787 - 787

Published: Oct. 29, 2024

Volatile organic compounds (VOCs) are ubiquitous in the atmosphere, posing significant adverse impacts on air quality and human health. However, current research atmospheric VOCs mainly focuses specific regions or industries, without comprehensive national-level analysis. In this study, a total of 99 articles China published from 2015 to 2024 were screened, data their concentrations, source apportionment, health risks extracted summarized. The results revealed that annual average concentrations TVOCs groups generally increased then decreased between 2011 2022, peaking 2018-2019. A distinct seasonal pattern was observed, with highest occurring winter, followed by autumn, spring, summer. TVOC emissions highly concentrated northern eastern China, contributed alkanes alkenes. Source apportionment indicated vehicle sources (32.9% ± 14.3%), industrial (18.0% 12.8%), other combustion (13.0% 13.0%) primary China. There positive correlation (

Language: Английский

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Combined Catalytic Conversion of NOx and VOCs: Present Status and Prospects

Materials, Journal Year: 2024, Volume and Issue: 18(1), P. 39 - 39

Published: Dec. 25, 2024

This article presents a comprehensive examination of the combined catalytic conversion technology for nitrogen oxides (NOx) and volatile organic compounds (VOCs), which are primary factors contributing to formation photochemical smog, ozone, PM2.5. These pollutants present significant threat air quality human health. The examines reaction mechanism interaction between photocatalytic NH3-SCR oxidation technology, highlighting limitations existing techniques, including catalyst deactivation, selectivity issues, regeneration methods, environmental impacts catalysts. Furthermore, anticipates prospective avenues research, underscoring necessity development bifunctional catalysts capable concurrently transforming NOx VOCs across broad temperature spectrum. review encompasses multitude integrated selective reduction (SCR), oxidation, low-temperature plasma biological purification technology. highlights further research into design principles, structure–activity relationships, performance evaluations in real industrial environments. is required develop more efficient, economical, environmentally friendly waste gas treatment technologies. concludes by outlining importance collaborative management strategies VOC emissions potential achieving these goals.

Language: Английский

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