Advances in Atmospheric Sciences, Год журнала: 2025, Номер unknown
Опубликована: Янв. 22, 2025
Язык: Английский
Atmospheric chemistry and physics, Год журнала: 2022, Номер 22(20), С. 13467 - 13493
Опубликована: Окт. 19, 2022
Abstract. The importance of dust heterogeneous oxidation in the removal atmospheric SO2 and formation sulfate aerosols is not adequately understood. In this study, Fe-, Ti-, Al-bearing components, Na+, Cl−, K+, Ca2+ surface, were discovered to be closely associated with sulfate. Regression models then developed make a reliable prediction reactivity based on particle chemical compositions. Further, recognized gas-phase, aqueous-phase, routes quantitatively assessed kinetically compared by combining laboratory work modelling study. presence 55 µg m−3 airborne dust, accounts for approximately 28.6 % secondary during nighttime, while proportion decreases 13.1 solar irradiation. On drivers (e.g. transition metal constituents, water-soluble ions) are more efficient than surface-adsorbed oxidants H2O2, NO2, O3) conversion SO2, particularly nighttime. Dust offers an opportunity explain missing source severe haze pollution events, its contribution complex environments could even higher current calculation results. Overall, surface responsible significant have profound impacts sulfur cycling.
Язык: Английский
Процитировано
40
Chem, Год журнала: 2023, Номер 9(4), С. 1036 - 1046
Опубликована: Март 17, 2023
Язык: Английский
Процитировано
28
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Май 30, 2024
Abstract Traditional atmospheric chemistry posits that sulfur dioxide (SO 2 ) can be oxidized to sulfate 4 2– through aqueous-phase reactions in clouds and gas-phase oxidation. Despite adequate knowledge of traditional mechanisms, several studies have highlighted the potential for SO oxidation within aerosol water. Given widespread presence tropospheric aerosols, 2− production water could a pervasive global impact. Here, we quantify contributions aqueous pathways formation based on GEOS-Chem simulations subsequent theoretical calculations. Hydrogen peroxide (H O significantly influences continental regions both horizontally vertically. Over past two decades, shifts typical cities reveal an intriguing trend: despite reductions emissions, increased capacities, like rising H levels, prevent steady decline concentrations. Abating oxidants would facilitate benefit reduction positive feedback mitigation.
Язык: Английский
Процитировано
15
The Science of The Total Environment, Год журнала: 2024, Номер 930, С. 172399 - 172399
Опубликована: Апрель 16, 2024
Язык: Английский
Процитировано
11
Environmental Pollution, Год журнала: 2024, Номер 349, С. 123992 - 123992
Опубликована: Апрель 15, 2024
Язык: Английский
Процитировано
10
Environmental Pollution, Год журнала: 2021, Номер 286, С. 117577 - 117577
Опубликована: Июнь 11, 2021
Язык: Английский
Процитировано
43
Journal of Geophysical Research Atmospheres, Год журнала: 2022, Номер 127(10)
Опубликована: Май 18, 2022
Abstract HONO concentrations in Beijing (BJ) and Sanmenxia (SMX) were simultaneously measured winter with a duration of 1 month, the sources sinks two cities comparably analyzed. BJ SMX had different pollution characteristics. Direct vehicle emission made contribution to observed about 28% BJ, whereas it contributed only 12% SMX. Additionally, direct from coal combustion also significant atmospheric HONO, which could achieve be 13%. In nighttime NO 2 conversion on aerosol ground surfaces 15% 27%, respectively. SMX, 40% 30%, Daytime heterogeneous (including photo‐enhanced conversion) was important 3 − photolysis 9% 4% BJ. The primary OH production rates daytime both three orders magnitude faster than those O , revealing dominant role local chemistry winter.
Язык: Английский
Процитировано
36
National Science Open, Год журнала: 2022, Номер 2(4), С. 20220050 - 20220050
Опубликована: Дек. 7, 2022
Aerosols of biological origins, known as bioaerosols, in addition to having the aerosol properties, have those a living system that offers them some enabling functionalities. From science technology, visible progress around world has been made bioaerosol field before and especially during COVID-19 pandemic. Here roles across various disciplines, including air quality, climate human health are highlighted appreciated light Anthropocene one concept. In particular, we recognized importance aerobiology under haze pollution, allergenic pollen involvement infectious inflammation-related non-communicable diseases. Future interdisciplinary studies focusing on chemical process microorganisms air, airborne transmission emerging pathogens allergens association between exposure development variations microbiome immune response needed elucidate interactions bioaerosols with earth system.
Язык: Английский
Процитировано
36
Atmospheric chemistry and physics, Год журнала: 2022, Номер 22(20), С. 13833 - 13844
Опубликована: Окт. 27, 2022
Abstract. Aerosol acidity plays a key role in regulating the chemistry and toxicity of atmospheric aerosol particles. The trend pH its drivers is crucial understanding multiphase formation pathways aerosols. Here, we reported first analysis from 2011 to 2019 eastern China, calculated with ISORROPIA model based on observed gas compositions. implementation Air Pollution Prevention Control Action Plan led −35.8 %, −37.6 −9.6 −81.0 % 1.2 changes PM2.5, SO42-, NHx, non-volatile cations (NVCs) NO3- Yangtze River Delta (YRD) region during this period. Different drastic compositions due Plan, showed minor change −0.24 over 9 years. Besides buffer effect, opposite effects SO42- played roles determining trend, contributing +0.38 −0.35, respectively. Seasonal variations were mainly driven by temperature, while diurnal both temperature relative humidity. In future, SO2, NOx NH3 emissions are expected be further reduced 86.9 74.9 41.7 2050 according best health effect pollution control scenario (SSP1-26-BHE). corresponding China estimated increase ∼0.19, resulting 0.04 less 0.12 NH4+ partitioning ratios, which suggests that emission controls effective mitigating haze China.
Язык: Английский
Процитировано
33
Journal of the American Chemical Society, Год журнала: 2022, Номер 144(48), С. 22302 - 22308
Опубликована: Ноя. 23, 2022
The multiphase oxidation of SO2 to sulfate in aerosol particles is a key process atmospheric chemistry. However, there large gap between the observed and simulated concentrations during severe haze events. To fill gaps understanding chemistry, combination experiments theoretical calculations provided evidence for direct, spin-forbidden excitation its triplet states using UVA photons at an air-water interface, followed by reactions with water O2 that facilitate rapid formation sulfate. estimated reaction energy whole process, 3SO2 + H2O 1/2O2 → HSO4- H+ (298 K, 1 M), was ΔGr = -107.8 kcal·mol-1. Moreover, revealed this multistep involving submerged, small barriers (∼10 kcal·mol-1). These results indicate photochemical interface solar actinic light may be important unaccounted source aerosols under polluted conditions.
Язык: Английский
Процитировано
32