The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 168902 - 168902
Опубликована: Ноя. 28, 2023
Язык: Английский
Environmental Pollution, Год журнала: 2024, Номер 363, С. 125291 - 125291
Опубликована: Ноя. 13, 2024
Язык: Английский
Процитировано
1
Atmospheric chemistry and physics, Год журнала: 2024, Номер 24(23), С. 13219 - 13230
Опубликована: Ноя. 29, 2024
Abstract. Water-soluble components significantly contribute to the oxidative potential (OP) of atmospheric fine particles (PM2.5), but our understanding water-soluble PM2.5 OP and its sources, as well relationship with components, is still limited. In this study, levels in wintertime south north Beijing, representing difference were measured dithiothreitol (DTT) assay. The volume-normalized DTT (DTTv) (3.5±1.2 nmol min−1 m−3) was comparable that (3.9±0.9 m−3), while mass-normalized (DTTm) (65±28 pmol µg−3) almost twice (36±14 µg−3). both DTTv better correlated soluble elements instead total elements. north, (mainly Mn, Co, Ni, Zn, As, Cd Pb) organic compounds, especially light-absorbing compounds (also known brown carbon), had positive correlations DTTv. However, south, mainly related Fe Pb. sources further resolved using matrix factorization (PMF) model. Traffic-related emissions (39 %) biomass burning (25 main traffic-related (>50 contributed most north. Our results indicate vehicle emission an important contributor Beijing ambient suggest more study needed understand intrinsic between compounds.
Язык: Английский
Процитировано
1
Опубликована: Март 21, 2024
Abstract. Water-soluble components have significant contribution to the oxidative potential (OP) of atmospheric fine particles, while our understanding their relationship is still limited. In this study, water-soluble OP levels in wintertime PM2.5 south and north Beijing, representing difference sources, were measured with dithiothreitol (DTT) assay. The volume normalized DTT (DTTv) (3.5 ± 1.2 nmol min-1 m-3) was comparable that (3.9 0.9 m-3), mass (DTTm) (65.3 27.6 pmol μg-3) almost twice (36.1 14.5 μg-3). both DTTv better correlated soluble elements instead total elements. north, (mainly Mn, Co, Ni, Zn, As, Cd Pb) organic compounds, especially light-absorbing compounds (also known as brown carbon), had positive correlations DTTv. However, south, mainly related Fe Pb. sources further resolved using matrix factorization (PMF) model. Traffic-related emissions (39.1 %) biomass burning (25.2 main traffic-related (> 50 contributed most north. Our results indicate vehicle emission important contributor Beijing ambient suggest more study needed understand intrinsic between light absorbing compounds.
Язык: Английский
Процитировано
1
Environmental Science and Ecotechnology, Год журнала: 2023, Номер 19, С. 100339 - 100339
Опубликована: Ноя. 14, 2023
The impact of reductive pulmonary inhalants on ultrafine particles (UFPs)-induced oxidative stress remains a crucial consideration, yet the concentration-dependent effects these have remained unexplored. Here we synthesized composite UFPs simulating atmospheric UFPs, primarily composed metals and quinones. We subjected to varying concentrations (0-7000 μM) two inhalants, N-acetylcysteine salbutamol, assess their influence potential, measured through dithiothreitol assay (OPDTT). Simultaneously, analysed soluble metal content uncover potential relationships between solubility. Our results unveil dual role played by in shaping OPDTT UFPs. Specifically, generally increased as inhalant rose from 0 300 μM. However, an intriguing reversal occurred when exceeded 500 μM, resulting decline OPDTT. Relative untreated induced promotion inhibition within concentration ranges 100-500 >1000 respectively. While no significant correlation emerged ranged 7000 noteworthy positive correlations at lower (e.g., 0-300 μM). These findings provide insights into health risks associated with UFP exposure, further underscoring need for continued research this critical area.
Язык: Английский
Процитировано
2
Опубликована: Фев. 6, 2024
Abstract. China has long-term high PM2.5 levels, and its Oxidative Potential (OP) is worth studying as it may unravel the impacts of aerosol pollution on public health better than alone. OP are influenced by meteorological factors, anthropogenic emissions sources atmospheric aging. Although their impact have been studied, measurements only recently became available a limited scale, they require considerable technical expertise resources. For this, joint relationship between for wide range conditions profiles remain elusive. Towards we estimated over using Danish Eulerian Hemispheric Model (DEHM) system with input from WRF weather forecast model. It was found that higher values were primarily concentrated in urban agglomerations central eastern regions China, while lower western northeastern regions. Furthermore, probability density function revealed about 40 % areas had an annual average concentrations exceeding Chinese limit; 36 below 1 𝑛𝑚𝑜𝑙 𝑚𝑖𝑛−1 𝑚−3, 41 2 23 above 𝑚−3. Analysis simulations indicate emission contributed 46 (65 %) 54 (35 to concentration variability. The sensitivity analysis also highlighted levels mostly determined secondary formation biomass burning.
Язык: Английский
Процитировано
0
Опубликована: Фев. 9, 2024
Abstract. China has long-term high PM2.5 levels, and its Oxidative Potential (OP) is worth studying as it may unravel the impacts of aerosol pollution on public health better than alone. OP are influenced by meteorological factors, anthropogenic emissions sources atmospheric aging. Although their impact have been studied, measurements only recently became available a limited scale, they require considerable technical expertise resources. For this, joint relationship between for wide range conditions profiles remain elusive. Towards we estimated over using Danish Eulerian Hemispheric Model (DEHM) system with input from WRF weather forecast model. It was found that higher values were primarily concentrated in urban agglomerations central eastern regions China, while lower western northeastern regions. Furthermore, probability density function revealed about 40 % areas had an annual average concentrations exceeding Chinese limit; 36 below 1 𝑛𝑚𝑜𝑙 𝑚𝑖𝑛−1 𝑚−3, 41 2 23 above 𝑚−3. Analysis simulations indicate emission contributed 46 (65 %) 54 (35 to concentration variability. The sensitivity analysis also highlighted levels mostly determined secondary formation biomass burning.
Язык: Английский
Процитировано
0
Atmospheric Pollution Research, Год журнала: 2024, Номер 15(5), С. 102060 - 102060
Опубликована: Фев. 10, 2024
Язык: Английский
Процитировано
0
Опубликована: Март 28, 2024
Abstract. China has long-term high PM2.5 levels, and its Oxidative Potential (OP) is worth studying as it may unravel the impacts of aerosol pollution on public health better than alone. OP are influenced by meteorological factors, anthropogenic emissions sources atmospheric aging. Although their impact have been studied, measurements only recently became available a limited scale, they require considerable technical expertise resources. For this, joint relationship between for wide range conditions profiles remain elusive. Towards we estimated over using Danish Eulerian Hemispheric Model (DEHM) system with input from WRF weather forecast model. It was found that higher values were primarily concentrated in urban agglomerations central eastern regions China, while lower western northeastern regions. Furthermore, probability density function revealed about 40 % areas had an annual average concentrations exceeding Chinese limit; 36 below 1 𝑛𝑚𝑜𝑙 𝑚𝑖𝑛−1 𝑚−3, 41 2 23 above 𝑚−3. Analysis simulations indicate emission contributed 46 (65 %) 54 (35 to concentration variability. The sensitivity analysis also highlighted levels mostly determined secondary formation biomass burning.
Язык: Английский
Процитировано
0
Опубликована: Март 28, 2024
Abstract. China has long-term high PM2.5 levels, and its Oxidative Potential (OP) is worth studying as it may unravel the impacts of aerosol pollution on public health better than alone. OP are influenced by meteorological factors, anthropogenic emissions sources atmospheric aging. Although their impact have been studied, measurements only recently became available a limited scale, they require considerable technical expertise resources. For this, joint relationship between for wide range conditions profiles remain elusive. Towards we estimated over using Danish Eulerian Hemispheric Model (DEHM) system with input from WRF weather forecast model. It was found that higher values were primarily concentrated in urban agglomerations central eastern regions China, while lower western northeastern regions. Furthermore, probability density function revealed about 40 % areas had an annual average concentrations exceeding Chinese limit; 36 below 1 𝑛𝑚𝑜𝑙 𝑚𝑖𝑛−1 𝑚−3, 41 2 23 above 𝑚−3. Analysis simulations indicate emission contributed 46 (65 %) 54 (35 to concentration variability. The sensitivity analysis also highlighted levels mostly determined secondary formation biomass burning.
Язык: Английский
Процитировано
0
Опубликована: Март 28, 2024
Abstract. China has long-term high PM2.5 levels, and its Oxidative Potential (OP) is worth studying as it may unravel the impacts of aerosol pollution on public health better than alone. OP are influenced by meteorological factors, anthropogenic emissions sources atmospheric aging. Although their impact have been studied, measurements only recently became available a limited scale, they require considerable technical expertise resources. For this, joint relationship between for wide range conditions profiles remain elusive. Towards we estimated over using Danish Eulerian Hemispheric Model (DEHM) system with input from WRF weather forecast model. It was found that higher values were primarily concentrated in urban agglomerations central eastern regions China, while lower western northeastern regions. Furthermore, probability density function revealed about 40 % areas had an annual average concentrations exceeding Chinese limit; 36 below 1 𝑛𝑚𝑜𝑙 𝑚𝑖𝑛−1 𝑚−3, 41 2 23 above 𝑚−3. Analysis simulations indicate emission contributed 46 (65 %) 54 (35 to concentration variability. The sensitivity analysis also highlighted levels mostly determined secondary formation biomass burning.
Язык: Английский
Процитировано
0