A Review of Characteristics, Causes, and Formation Mechanisms of Haze in Southeast Asia

Van, Dieu-Anh; Vu, Tuan V.; Nguyen, Thu-Hien; Vo, Le-Ha T.; Le, Nhung Hong; Nguyen, Phan H.T.; Pongkiatkul, Prapat; Ly, Bich-Thuy

doi:10.1007/s40726-022-00220-z

Cited by 13 publications

(2 citation statements)

References 115 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Atmospheric haze pollution has become one of the major environmental concerns in recent years due to the severe adverse impacts on air quality and public health. − Ambient fine particulate matter (PM 2.5 ) serves as a leading cause of haze pollution in many urban areas of China during winter heating seasons. , Organic aerosols, especially those formed from the oxidation of various volatile organic compounds, are important components in ambient PM 2.5 during haze episodes . Organic aerosols usually consist of hundreds to thousands of chemically distinct compounds that are highly complex in composition and nature.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Production of Organosulfur Species during a Severe Winter Haze Episode in the Guanzhong Basin of Northwest China

Han

Zhang

Lou

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

The molecular composition of organic aerosols in ambient PM 2.5 was investigated in an urban area in the Guanzhong basin of northwest China during a severe regional haze episode in the winter of 2018/2019. Organic matter, accounting for 20−35% of PM 2.5 mass concentration, was characterized using direct infusion and electrospray ionization coupled with high-resolution Orbitrap mass spectrometry. The number of organic molecular formula assignments was primarily dominated by organosulfur species (OrgS, including CHOS and CHONS) in negative ion mode. The number and peak signal intensity of OrgS distinctly increased during the severe haze episode. Organosulfates and nitrooxyorganosulfates constituted the majority number (72−94%) of OrgS over the entire period. Although the OrgS were mostly present in aliphatic molecular structures, an increase in the number of polycyclic aromatic OrgS on haze days revealed the enhanced contribution from anthropogenic sources. The number of OrgS strongly correlated with ambient relative humidity and the oxidation ratios of sulfur and nitrogen, suggesting the important roles of aqueous phase chemistry and atmospheric oxidation in the formation of OrgS. A thorough understanding of the significance of OrgS will be essential to assess and mitigate the adverse impacts of haze pollution.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced Production of Organosulfur Species during a Severe Winter Haze Episode in the Guanzhong Basin of Northwest China

Han

Zhang

Lou

et al. 2023

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Higher exposure to air pollutants was observed in low-and middle-income countries [5][6][7]. Haze is a well-known air pollution phenomenon linked to persistent particulate matter episodes in Southeast Asia (SEA), significantly impacting the economy, health and environment [8]. Countries such as Malaysia, Singapore, Indonesia, and Thailand have been experiencing almost yearly smoke-haze episodes for decades due to the recurrent slash and burn agricultural activities and prolonged dry season [9,10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Ambient Particulate Matter (PM2.5) Exposure on Calorie Intake and Appetite of Outdoor Workers

et al. 2022

View full text Add to dashboard Cite

Malaysia has been experiencing smoke-haze episodes almost annually for the past few decades. PM2.5 is the main component in haze and causes harmful impacts on health due to its small aerodynamic size. This study aimed to explore the implications of PM2.5 exposure on the dietary intake of working individuals. Two phased 13-weeks follow-up study was conducted involving 440 participants, consisting of two cohorts of outdoor and indoor workers. Ambient PM2.5 concentrations were monitored using DustTrakTM DRX Aerosol Monitor. Data on Simplified Nutritional Appetite Questionnaire (SNAQ) and 24 h diet recall were collected weekly. The highest PM2.5 concentration of 122.90 ± 2.07 µg/m3 was recorded in August, and it vastly exceeded the standard value stipulated by US EPA and WHO. SNAQ scores and calorie intake were found to be significantly (p < 0.05) associated with changes in PM2.5 exposure of outdoor workers. Several moderate and positive correlations (R-value ranged from 0.4 to 0.6) were established between SNAQ scores, calorie intake and PM2.5 exposure. Overall findings suggested that long hours of PM2.5 exposure affect personal dietary intake, potentially increasing the risk of metabolic syndromes and other undesired health conditions. The current policy should be strengthened to safeguard the well-being of outdoor workers.

show abstract

Stable isotopic, bulk, and molecular compositions of post-monsoon biomass-burning aerosols in Delhi suggest photochemical ageing during regional transport is more pronounced than local processing

Agarwal,

Aggarwal,

Kunwar

et al. 2024

J Atmos Chem

View full text Add to dashboard Cite

A Review of Characteristics, Causes, and Formation Mechanisms of Haze in Southeast Asia

Cited by 13 publications

References 115 publications

Enhanced Production of Organosulfur Species during a Severe Winter Haze Episode in the Guanzhong Basin of Northwest China

Enhanced Production of Organosulfur Species during a Severe Winter Haze Episode in the Guanzhong Basin of Northwest China

Effects of Ambient Particulate Matter (PM2.5) Exposure on Calorie Intake and Appetite of Outdoor Workers

Stable isotopic, bulk, and molecular compositions of post-monsoon biomass-burning aerosols in Delhi suggest photochemical ageing during regional transport is more pronounced than local processing

Contact Info

Product

Resources

About