Source identification and mitigation of indoor air pollution using monitoring data – Current trends

Environmental Technology & Innovation, Год журнала: 2024, Номер 33, С. 103534 - 103534

Опубликована: Янв. 8, 2024

Poor indoor air quality is responsible for around 3.2 million premature deaths each year. Accurately identifying pollution (IAP) sources a quintessential step towards mitigating pollutants and associated health risks. Traditionally, receptor models have been used however, recently, new source identification methods risen, which use real-time continuous monitoring data. In this review, the state-of-art in mitigation trends using IAP are critically analysed. Thirty-two research articles were reviewed with emphasis on along monitoring: environments monitored, pollutants, methods, found. Receptor factor analysis still most prevalent method. Meanwhile, of has rapidly increasing. Even low-cost sensors (LCS) started to be sources. This review proposes method implementing identification. It also hypothesises novel hybrid approach both traditional samplers can simultaneously preventive as well reactive measures. The LCS supplement proposed, owing their ubiquity. However, technologies need advance further assure reliability.

Язык: Английский

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Electronic nose for the detection and discrimination of volatile organic compounds: application, challenges, and perspectives

TrAC Trends in Analytical Chemistry, Год журнала: 2024, Номер 180, С. 117958 - 117958

Опубликована: Сен. 6, 2024

Язык: Английский

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Sources of Wintertime Atmospheric Organic Pollutants in a Large Canadian City: Insights from Particle and Gas Phase Measurements

ACS ES&T Air, Год журнала: 2024, Номер 1(7), С. 690 - 703

Опубликована: Май 3, 2024

Although atmospheric organic pollutants have been extensively studied to elucidate summertime urban photochemical air pollution, uncertainties remain concerning the quality of wintertime in large northern North American cities. Here, we used online mass spectrometric measurements volatile compounds (VOCs) and aerosol (OA), combined with positive matrix factorization (PMF), identify sources downtown Toronto, Canada during February–March 2023. In some cases, comparable PMF factors were identified for both VOCs OA, such as from traffic, cooking, background oxygenated sources. However, VOC yielded additional information, a factor associated human-related emissions VOCs. Additionally, yields two traffic factors: one likely related gasoline diesel use. Despite cold relatively dark conditions, OA grow intensity daytime, indicative activity, whereas cooking enhanced morning late evening due timing vehicle use, boundary layer effects. This study illustrates benefits that arise parallel source–receptor analyses gases particles.

Язык: Английский

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Recent Advancement in Organic Aerosol Understanding: a Review of Their Sources, Formation, and Health Impacts

Water Air & Soil Pollution, Год журнала: 2023, Номер 234(12)

Опубликована: Ноя. 27, 2023

Язык: Английский

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Volatile organic compounds emitted by humans indoors– A review on the measurement, test conditions, and analysis techniques

Building and Environment, Год журнала: 2024, Номер 255, С. 111442 - 111442

Опубликована: Март 25, 2024

The impact of indoor air quality on human health is gaining importance as people spend 90% their time indoors. It has been established that occupancy a significant contributor to Volatile Organic Compound (VOC) concentrations and concern regarding occupant health, yet VOC emissions remain largely uncharacterised. In the current study, we review recent research examines contributions humans profile in occupied spaces, with focus study characteristics. This investigation identified hierarchy factors contributing inter-study variations biogenic (HVOC) levels measured We found variation reported HVOC are related sampling techniques used, test conditions, sample analysis. Contrasting findings issues such effect nutrition smoking discussed. Conclusions were reached about advancements nature results need use larger datasets, recommendations global guidelines future testing have made. advocate for unified approach studies, promoting more coordinated data collection reporting fostering development impactful applications.

Язык: Английский

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Toxicological Effects of Secondary Air Pollutants

Chemical Research in Chinese Universities, Год журнала: 2023, Номер 39(3), С. 326 - 341

Опубликована: Апрель 29, 2023

Язык: Английский

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Ozone generation and chemistry from 222 nm germicidal ultraviolet light in a fragrant restroom

Environmental Science Processes & Impacts, Год журнала: 2024, Номер 26(6), С. 1090 - 1106

Опубликована: Янв. 1, 2024

Devices using 222 nm germicidal ultraviolet light (GUV222) have been marketed to reduce virus transmission indoors. However, GUV222 generates ozone which can react with gases and surfaces create undesirable air byproducts.

Язык: Английский

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How Does Personal Hygiene Influence Indoor Air Quality?

Environmental Science & Technology, Год журнала: 2024, Номер 58(22), С. 9750 - 9759

Опубликована: Май 23, 2024

Humans are known to be a continuous and potent indoor source of volatile organic compounds (VOCs). However, little is about how personal hygiene, in terms showering frequency, can influence these emissions their impact on air chemistry involving ozone. In this study, we characterized the VOC composition controlled climate chamber (22.5 m3 with an change rate at 3.2 h–1) occupied by four male volunteers successive days under ozone-free (∼0 ppb) ozone-present (37–40 conditions. The either showered evening prior experiments or skipped for 24 48 h. Reduced shower frequency increased human gas-phase carboxylic acids, possibly originating from skin bacteria. With ozone present, increasing number no-shower enhanced ozone-skin surface reactions, yielding higher levels oxidation products. Wearing same clothing over several reduced level generated clothing-ozone reactions. When lotion was applied, yield ozonolysis products decreased, while other due reactions ingredients. These findings help determine degree which hygiene choices affect exposures.

Язык: Английский

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Indoor Volatile Organic Compounds: Concentration Characteristics and Health Risk Analysis on a University Campus

International Journal of Environmental Research and Public Health, Год журнала: 2023, Номер 20(10), С. 5829 - 5829

Опубликована: Май 16, 2023

Volatile organic compounds (VOCs) are major indoor air pollutants that contain several toxic substances. However, there few studies on health risk assessments of VOCs in China. This study aimed to determine the concentration characteristics college campuses by collecting VOC samples from different locations campus during seasons combined with exposure times students each location obtained a questionnaire survey assess possible risks. The highest total (254 ± 101 µg/m3) was dormitory. seasonal variation TVOC concentrations related emission sources addition temperature. Health were evaluated using non-carcinogenic and carcinogenic values, represented hazard quotient (HQ) lifetime cancer (LCR), respectively. risks at all sampling sites within safe range (HQ < 1). Dormitories had risk, whereas other three places low (with LCR 1.0 × 10−6). Moreover, 1,2-dichloroethane identified as substance dormitory due its high (1.95 provides basic data basis for formulating measures improve people’s living environments.

Язык: Английский

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Biomimetic microfluidic chips for toxicity assessment of environmental pollutants

The Science of The Total Environment, Год журнала: 2024, Номер 919, С. 170745 - 170745

Опубликована: Фев. 8, 2024

Язык: Английский

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