Emission characteristics of reactive organic gases (ROGs) from industrial volatile chemical products (VCPs) in the Pearl River Delta (PRD), China DOI Creative Commons
Sihang Wang, Bin Yuan,

Xianjun He

и другие.

Atmospheric chemistry and physics, Год журнала: 2024, Номер 24(12), С. 7101 - 7121

Опубликована: Июнь 20, 2024

Abstract. Volatile chemical products (VCPs) have become an important source of reactive organic gases (ROGs) in urban areas worldwide. Industrial activities can also utilize a large number VCPs and emit many into the atmosphere. Due to multiple sampling measurement challenges, only subset ROG species is usually measured for industrial VCP sources. This study aims investigate emissions ROGs from five sources Pearl River Delta (PRD) region China, including shoemaking, plastic surface coating, furniture printing, ship coating industries. A more comprehensive speciation these was developed by combination proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) gas chromatography–mass spectrometer/flame ionization detector (GC–MS/FID). Our identified oxygenated (OVOCs) as representative emitted sources, which are highly related specific chemicals used during activities. Moreover, spectra similarity analysis revealed significant dissimilarities among activities, indicating substantial variations between different Except industry utilizing solvent-borne coatings, proportions OVOCs range 67 % 96 total 72 97 OH reactivity (OHR) while corresponding contributions 16 ± 3.5 15 3.6 %. The associated with coatings exhibited higher ozone formation potential (OFP), reaching high 5.5 2.7 g O3 g−1 industries, primarily due aromatics. We find that few contribute majority their OHR OFP various results suggest treatment devices may limited effectiveness all ROGs, efficiencies ranging −12 68 Furthermore, we found ambient measurements been significantly impacted pairs (e.g., methyl ethyl ketone (MEK) / C8 aromatics ratio) be utilized reliable evidence using high-time-resolution PTR-ToF-MS. demonstrated importance measuring PTR-ToF-MS characterizing

Язык: Английский

Tracking Daily Concentrations of PM2.5 Chemical Composition in China since 2000 DOI Creative Commons
Shigan Liu, Guannan Geng, Qingyang Xiao

и другие.

Environmental Science & Technology, Год журнала: 2022, Номер 56(22), С. 16517 - 16527

Опубликована: Ноя. 1, 2022

PM2.5 chemical components play significant roles in the climate, air quality, and public health, vary due to their different physicochemical properties. Obtaining accurate timely updated information on China's composition is basis for research environmental management. Here, we developed a full-coverage near-real-time data set at 10 km spatial resolution since 2000, combining Weather Research Forecasting-Community Multiscale Air Quality modeling system, ground observations, machine learning algorithm, multisource-fusion data. our are good agreement with available observations (correlation coefficients range from 0.64 0.75 monthly scale 2000 2020 0.67 0.80 daily 2013 2020; most normalized mean biases within ±20%). Our reveals long-term trends China, especially rapid decreases after sulfate, nitrate, ammonium, organic matter, black carbon, rate of -9.0, -7.2, -8.1, -8.4, -9.2% per year, respectively. The day-to-day variability also well captured, including evolutions distribution shares components. As part Tracking Pollution China (http://tapdata.org.cn), this daily-updated provides large opportunities health climate as policy-making China.

Язык: Английский

Процитировано

188
Efficacy of China’s clean air actions to tackle PM2.5 pollution between 2013 and 2020 DOI
Guannan Geng, Yuxi Liu, Yang Liu

и другие.

Nature Geoscience, Год журнала: 2024, Номер unknown

Опубликована: Сен. 18, 2024

Язык: Английский

Процитировано

65
Formation of secondary organic aerosol from wildfire emissions enhanced by long-time ageing DOI
Yicong He, Bin Zhao, Shuxiao Wang

и другие.

Nature Geoscience, Год журнала: 2024, Номер 17(2), С. 124 - 129

Опубликована: Янв. 9, 2024

Язык: Английский

Процитировано

22
Challenges and perspectives of air pollution control in China DOI Creative Commons
Bin Zhao, Shuxiao Wang, Jiming Hao

и другие.

Frontiers of Environmental Science & Engineering, Год журнала: 2024, Номер 18(6)

Опубликована: Апрель 20, 2024

Abstract Air pollution is one of the most challenging environmental issues in world. China has achieved remarkable success improving air quality last decade as a result aggressive control policies. However, average fine particulate matter (PM 2.5 ) concentration still about six times World Health Organization (WHO) Global Quality Guidelines (AQG) and causing significant human health risks. Extreme emission reductions multiple pollutants are required for to achieve AQG. Here we identify major challenges future improvement propose corresponding strategies. The main include persistently high risk attributed PM pollution, excessively loose standards, coordinated greenhouse gases (GHGs) emissions emerging pollutants. To further improve protect health, health-oriented strategy shall be implemented by tightening standards well optimizing reduction pathways based on risks various sources. In meantime, an “one-atmosphere” concept adopted strengthen synergistic GHGs non-combustion sources enhanced.

Язык: Английский

Процитировано

21
Extreme Emission Reduction Requirements for China to Achieve World Health Organization Global Air Quality Guidelines DOI
Yueqi Jiang, Dian Ding, Zhaoxin Dong

и другие.

Environmental Science & Technology, Год журнала: 2023, Номер 57(11), С. 4424 - 4433

Опубликована: Март 10, 2023

A big gap exists between current air quality in China and the World Health Organization (WHO) global guidelines (AQG) released 2021. Previous studies on pollution control have focused emission reduction demand but ignored influence of transboundary pollution, which has been proven to a significant impact China. Here, we develop an emission-concentration response surface model coupled with quantify for achieve WHO AQG. cannot AQG by its own high both PM2.5 O3. Reducing will loosen NH3 VOCs emissions However, meet 10 μg·m-3 60 peak season O3, still needs reduce SO2, NOx, NH3, VOCs, primary more than 95, 76, 62, 96% respectively, basis 2015. We highlight that extreme great efforts addressing are crucial reach

Язык: Английский

Процитировано

30
Sources of organic aerosols in eastern China: a modeling study with high-resolution intermediate-volatility and semivolatile organic compound emissions DOI Creative Commons
Jingyu An, Cheng Huang, Dandan Huang

и другие.

Atmospheric chemistry and physics, Год журнала: 2023, Номер 23(1), С. 323 - 344

Опубликована: Янв. 10, 2023

Abstract. Current chemical transport models fail to reproduce both the concentrations and temporal variations of organic aerosol (OA), especially secondary (SOA), hindering identification major contribution sources. The fact that precursors intermediate-volatility semivolatile compounds (I/SVOCs) are not included in has a significant impact on performance SOA simulation. Herein, we establish high-resolution emission inventory I/SVOCs by incorporating it into CMAQ model, concentrations, variations, spatial distributions POA originating from different sources Yangtze River Delta (YRD) region China were simulated. By I/SVOC emissions modeled average increased 148 %. Significant model improvements simulations OA components demonstrated comparison with comprehensive observation data. Furthermore, seasonal source contributions production have been identified. We found cooking predominant densely populated urban area region. industrial dominant contributors formation, followed those mobile Our results indicate future control measures should be specifically tailored an intraregional scale based characteristics achieve national goal continuous improvement air quality. In addition, local profiles factors I/SVOCs, as well formation mechanisms framework must urgently updated further improve thus accuracy identifications.

Язык: Английский

Процитировано

27
Trends of Full-Volatility Organic Emissions in China from 2005 to 2019 and Their Organic Aerosol Formation Potentials DOI
Haotian Zheng, Xing Chang, Shuxiao Wang

и другие.

Environmental Science & Technology Letters, Год журнала: 2023, Номер 10(2), С. 137 - 144

Опубликована: Янв. 31, 2023

Emissions of organic compounds have strong influences on the environment. Most previous emission inventories only cover emissions particulate carbon and nonmethane volatile (NMVOC) but neglect semivolatile intermediate (S/IVOC), which considerably contribute to aerosol (OA) burden. Herein, we developed a full-volatility inventory in China from 2005 2019 analyzed OA formation potential (OAFP) each volatility bin source using two-dimensional basis set (2D-VBS) box model. The low/extremely low/ultralow VOC (xLVOC) decreased substantially during 2005–2019, while SVOC showed significant decline after 2014, mainly because reduced residential biomass consumption. IVOC amounts were similar those 2005; however, major sources changed substantially. chemical products (VCP) increased significantly became dominant emissions. S/IVOC VCP contributed 1322 kt OAFP 2019, higher than total anthropogenic xLVOC Considering high S/IVOC, future air pollution control policies should prioritize VCP, burning, diesel vehicles.

Язык: Английский

Процитировано

25
Differentiated emissions and secondary organic aerosol formation potential of organic vapor from industrial coatings in China DOI

Chengrui Liang,

Boyang Feng,

Shuxiao Wang

и другие.

Journal of Hazardous Materials, Год журнала: 2024, Номер 466, С. 133668 - 133668

Опубликована: Янв. 30, 2024

Язык: Английский

Процитировано

12
Reduced but still noteworthy atmospheric pollution of trace elements in China DOI Creative Commons
Shuhan Liu, Hezhong Tian, Chuanyong Zhu

и другие.

One Earth, Год журнала: 2023, Номер 6(5), С. 536 - 547

Опубликована: Май 1, 2023

Язык: Английский

Процитировано

24
Higher Toxicity of Gaseous Organics Relative to Particulate Matters Emitted from Typical Cooking Processes DOI

Zihua Guo,

Chen Xiu, Di Wu

и другие.

Environmental Science & Technology, Год журнала: 2023, Номер 57(44), С. 17022 - 17031

Опубликована: Окт. 24, 2023

Cooking emission is known to be a significant anthropogenic source of air pollution in urban areas, but its toxicities are still unclear. This study addressed the fine particulate matter (PM2.5) and gaseous organics by combining chemical fingerprinting analysis with cellular assessments. The cytotoxicity reactive oxygen species activity were ∼1.9 ∼8.3 times higher than those PM2.5, respectively. Moreover, these values per unit mass PM2.5 ∼7.1 ∼15.7 collected from ambient Shanghai. total oleic acid equivalent quantities for carcinogenic toxic respiratory effects organics, as estimated using predictive models based on quantitative structure-property relationships, 1686 ± 803 430 176 μg/mg Both predicted consistent assessment. These health risks primarily attributed high relative content equivalency factor organic compounds present gas phase, including 7,9-di-tert-butyl-1-oxaspiro(4,5)deca-6,9-diene-2,8-dione, 2-ethylhexanoic acid, 2-phenoxyethoxybenzene. Furthermore, fatty acids identified prominent markers cooking-related emissions. obtained results highlight importance control measures cooking-emitted reduce personal exposure risks.

Язык: Английский

Процитировано

20