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Tartakovsky D, Kordova-Biezuner L, Broday DM. PM 2.5 and NOX concentrations decrease as a result of a railway electrification. ENVIRONMENTAL MONITORING AND ASSESSMENT 2025; 197:188. [PMID: 39853614 DOI: 10.1007/s10661-025-13654-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2024] [Accepted: 01/14/2025] [Indexed: 01/26/2025]
Abstract
This work examines the impact of the electrification of the Holon-Bat Yam passenger train line (central Israel) on air pollutant concentrations using data collected from air quality monitoring stations that operated at the train stations across the electrified train line. We present statistically significant reduction in the annual average NO2, NO and NOX concentrations (29-45%, 79-85% and 65-75%, respectively), attributed to the electrification of the passenger train line. The drop in the NO and NOX concentrations was much stronger than in the NO2 concentrations, since NO is the main nitrogen species emitted by diesel locomotives. PM2.5 concentrations also significantly decreased, but only in two (out of the three) train stations situated along the electrified line. Following various analyses, we conclude that electrification of train lines reduces train locomotive emissions and improves the air quality at the stations, as expected, thus protecting the passengers and reducing their exposure to air pollutants. Although this study presents a specific case, the findings are expected to be applicable, at least quantitatively, to other locations, as railway electrification removes emissions associated with fossil-fuel-powered locomotives. This work supports railway electrification policy, which has the potential to substantially lower air pollution levels and diminish the passengers' exposure to harmful air pollutants.
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Affiliation(s)
| | - Levana Kordova-Biezuner
- Air Quality and Asbestos Division, Israeli Air Monitoring Network, Israeli Ministry of Environmental Protection, Tel Aviv, Israel
| | - David M Broday
- Technion - Israel Institute of Technology, Haifa, Israel
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Zhen S, Li N, Li Y, Li Q, Zheng L, Yin Z, Dou Y, Wu S, Liu Y, Zhang X, Yang X, Wang Y, Ge W, Gao X, Yang J, Liang F, Hu J, Zhao Y. Maternal exposure to fine particulate matter before and during pregnancy, and the risk of birth defects: A population-based study. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2025; 289:117408. [PMID: 39626490 DOI: 10.1016/j.ecoenv.2024.117408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2024] [Revised: 11/22/2024] [Accepted: 11/22/2024] [Indexed: 01/26/2025]
Abstract
Although epidemiological evidence has linked maternal exposure to air pollution with adverse birth outcomes, the association between exposure to fine particulate matter (PM2.5) and the risk of total birth defects in highly polluted developing regions remains limited. The objective of this study was to assess the relationship between maternal exposure to PM2.5 before and during pregnancy and the occurrence of birth defects. This study included 16,080 births with birth defects and 567,483 controls born between 2014 and 2019 in 14 cities in Liaoning Province, China. The assessment of exposure was conducted using satellite-based PM2.5 data at a spatial resolution of 1 km. Participants were classified into four subgroups based on their exposure to PM2.5 before and during pregnancy. The association between maternal exposure to PM2.5, and the risk of birth defects, was estimated using logistic regression models. For each 10 μg/m³ increase in PM2.5, the odds ratios of birth defects were 1.68 (95% CI: 1.65, 1.70) and 2.41 (95% CI: 2.36, 2.45) during the preconception period and pregnancy, respectively. We observed a J-shaped association between maternal PM2.5 exposure during both the preconception period and pregnancy and the risk of total birth defects. Mothers exposed to elevated levels of PM2.5 during both the preconception period and pregnancy exhibited the highest risk of total birth defects (odds ratio: 4.43, 95% CI: 4.17, 4.71). Our findings illustrated that maternal exposure to PM2.5 before and during pregnancy was associated with increased risks of birth defects and underscored the potential health benefits of reducing air pollution exposure during the preconception period and pregnancy.
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Affiliation(s)
- Shihan Zhen
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Na Li
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, China Medical University, Shenyang 110004, China
| | - Yan Li
- Liaoning Provincial Hospital for Women and Children, Shenyang 110005, China
| | - Qian Li
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Lu Zheng
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Zhouxin Yin
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yan Dou
- Department of Epidemiology, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Shuqi Wu
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Yilin Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, China Medical University, Shenyang 110004, China; Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Xiaoyan Zhang
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Xinyue Yang
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Ye Wang
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Wenxiu Ge
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Xiaoyu Gao
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Jing Yang
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China
| | - Fengchao Liang
- School of Public Health and Emergency Management, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Jiajin Hu
- Research Center of China Medical University Birth Cohort, Shengjing Hospital of China Medical University, Shenyang 110004, China; Health Sciences Institute, China Medical University, Shenyang 110122, China.
| | - Ying Zhao
- Liaoning Provincial Hospital for Women and Children, Shenyang 110005, China.
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Zhang Y, Huang W, Xu R, Ye T, Chen G, Yue X, Coêl MDSZS, Saldiva PHN, Song J, Guo Y, Li S. Wildfire-sourced fine particulate matter and preterm birth risks in Brazil: A nationwide population-based cohort study. JOURNAL OF HAZARDOUS MATERIALS 2024; 480:136290. [PMID: 39476695 DOI: 10.1016/j.jhazmat.2024.136290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2024] [Revised: 10/15/2024] [Accepted: 10/23/2024] [Indexed: 12/01/2024]
Abstract
Wildfire-specific particulate matter with diameters ≤ 2.5 µm (PM2.5) is the key component of wildfire smoke, with potentially higher toxicity than PM2.5 from other sources. In this nationwide population-based cohort study, we included 22,163,195 births from Brazil during 20102019. Daily wildfire-specific PM2.5 was estimated through the chemical transport model. Time-varying Cox proportional hazards models were used to characterize the exposure-time-response (E-T-R) relationship between weekly wildfire-specific PM2.5 exposure and preterm birth (PTB) risks, followed by subgroup analyses. A 10 µg/m3 increment in wildfire-specific PM2.5 was associated with a hazard ratio of 1.047 (95 % confidence interval [CI]: 1.032-1.063) for PTB. Stronger associations between wildfire-specific PM2.5 and PTB were observed during earlier pregnancy, among female infants, and pregnant women < 18 years old, in ethnic minorities, with a length of education ≥ 11 years, from low-income or high-temperature municipalities, and residing in North/Northeast regions. An estimated 1.47 % (95 % CI: 1.01 %1.94 %) of PTBs were attributable to wildfire-specific PM2.5 in Brazil, increasing from 2010 to 2019. The PTBs attributable to wildfire-specific PM2.5 surpassed those attributed to non-wildfire PM2.5 (0.31 %, 95% CI: 0.09 %0.57 %). Wildfire emerged as a critical source contributing to the PM2.5-linked PTBs. Prioritized fire management and emission control strategies are warranted for PTB prevention.
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Affiliation(s)
- Yiwen Zhang
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Wenzhong Huang
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Rongbin Xu
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Tingting Ye
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Gongbo Chen
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Xu Yue
- Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
| | | | | | - Jiangning Song
- Monash Biomedicine Discovery Institute, Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Australia
| | - Yuming Guo
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Shanshan Li
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia.
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Liu Y, Chen YL, Yu CJ, Han R, Chen L, Liu ML, Sun M, Zeng ZY, Wang Q, Xu XM, Wu SD. Associations between maternal periconceptional exposure to PM 2.5 and the risk of cryptorchidism: a case-control study of 4274. Sci Rep 2024; 14:29703. [PMID: 39614101 DOI: 10.1038/s41598-024-81024-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2024] [Accepted: 11/24/2024] [Indexed: 12/01/2024] Open
Abstract
Currently, there is limited evidence regarding the association between prenatal exposure to environmental fine particulate matter (PM2.5) and the occurrence of cryptorchidism. The objective of this study was to evaluate the potential correlation between prenatal exposure to PM2.5 and the likelihood of cryptorchidism developing in offspring. We performed a 1:1 case-control study, defining the cases as children diagnosed with cryptorchidism at the Children's Hospital Affiliated to Chongqing Medical University from 2013 to 2017, while the control group comprised children born in the corresponding years who did not have any birth defects, chromosomal abnormalities, and had only trauma-related treatments. Between 2012 and 2017, monthly averages of PM2.5, other pollutants (O3, PM10) and temperature were gathered based on the geographical coordinates of patients' residences. The study assessed the correlation between the two using multivariate logistic regression model, and sensitivity analysis was conducted to assess the stability of the model. We included a total of 2137 cases and 2137 matched controls from 2013 to 2017. Our findings revealed that there was a positive association between exposure to PM2.5 during the first 2 months of pregnancy and the occurrence of cryptorchidism. According to this study, the development of cryptorchidism appears to be associated with maternal exposure to PM2.5 during early pregnancy.
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Affiliation(s)
- Yan Liu
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Yin-Lin Chen
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Cheng-Jun Yu
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Rong Han
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Long Chen
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Mao-Lin Liu
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Miao Sun
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Zhong-Yao Zeng
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Quan Wang
- Department of Cardiothoracic Surgery, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Xi-Ming Xu
- Big Data Center for Children's Medical Care, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China
| | - Sheng-de Wu
- Department of Urology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Structural Birth Defect and Reconstruction, Children's Hospital of Chongqing Medical University, Chongqing, 400014, People's Republic of China.
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5
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Zhao Z, Liu W, Hu J, Chen S, Gao Y, Wang H, Luo M, Zhou T, Zhang G. Cohort Profile: China Southwest Birth Cohort (CSBC). Int J Epidemiol 2023; 52:e347-e353. [PMID: 37440714 PMCID: PMC10749777 DOI: 10.1093/ije/dyad103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Affiliation(s)
- Ziling Zhao
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Weixin Liu
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Jinnuo Hu
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Shiqi Chen
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Yan Gao
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Hong Wang
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Min Luo
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Tianjin Zhou
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
| | - Gang Zhang
- Obstetrics Department, Sichuan Provincial Maternity and Child Health Care Hospital (The Affiliated Women’s and Children’s Hospital of Chengdu Medical College), Chengdu, China
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Xiang Z, Han R, Chen L, Gao L. Predictors of physical activity among Chinese pregnant women during the first trimester: A cross-sectional study. J Sports Sci 2023; 41:1883-1891. [PMID: 38234226 DOI: 10.1080/02640414.2024.2306448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 01/10/2024] [Indexed: 01/19/2024]
Abstract
Physical activity during pregnancy has numerous health benefits for the woman and the foetus. The current study investigated physical activity engagement and its predictors among pregnant Chinese women during the first trimester. A total of 687 pregnant women completed the Pregnancy Physical Activity Questionnaire. Bivariate and multivariate logistic regression were used to analyse the data. The current physical activity guidelines were not met by 64.3% of respondents. Women with higher levels of physical activity self-efficacy (aOR = 0.96; 95% CI: 0.92-0.99) and social support (aOR = 0.95; 95% CI: 0.94-0.97) had lower odds of not meeting the current physical activity guidelines. Women who were aged < 35 years (aOR = 1.85; 95% CI: 1.02-3.34), had lower education (aOR = 1.63; 95% CI: 1.04-2.55), were primiparous (aOR = 11.03; 95% CI: 6.98-17.44), were unsure of their delivery mode (aOR = 2.32; 95% CI: 1.95-5.64), and those who had higher levels of pregnancy-associated discomfort (aOR = 1.10; 95% CI: 1.03-1.19) had higher odds of not meeting the current physical activity guidelines. The current study suggests that healthcare professionals should assess physical activity engagement during routine antenatal care and increase efforts to strengthen pregnant women's self-efficacy and social support to promote physical activity engagement during the first trimester.
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Affiliation(s)
- Zhixuan Xiang
- School of Nursing, Xiangtan Medicine & Health Vocational College, Xiangtan, China
| | - Rongrong Han
- School of Nursing, Sun Yat-sen University, Guangzhou, China
| | - Lu Chen
- School of Nursing, Sun Yat-sen University, Guangzhou, China
| | - Lingling Gao
- School of Nursing, Sun Yat-sen University, Guangzhou, China
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Nirel R, Shoham T, Rotem R, Ahmad WA, Koren G, Kloog I, Golan R, Levine H. Maternal exposure to particulate matter early in pregnancy and congenital anomalies in offspring: Analysis of concentration-response relationships in a population-based cohort with follow-up throughout childhood. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 880:163082. [PMID: 37004765 DOI: 10.1016/j.scitotenv.2023.163082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 03/22/2023] [Accepted: 03/22/2023] [Indexed: 05/27/2023]
Abstract
Studies have suggested an association between particulate matter (PM) air pollution and certain congenital anomalies (CAs). However, most studies assumed a linear concentration-response relation and were based on anomalies that were ascertained at birth or up to 1 year of age. We investigated associations between exposures to PM during the first trimester of pregnancy and CAs in 9 organ systems using birth and childhood follow-up data from a leading health care provider in Israel. We conducted a retrospective population-based cohort study among 396,334 births, 2004-2015. Daily PM data at a 1 × 1 km spatial grid were obtained from a satellite-derived prediction models and were linked to the mothers' residential addresses at birth. Adjusted odds ratios (ORs) were estimated with logistic regression models using exposure levels as either continuous or categorical variables. We captured 57,638 isolated CAs with estimated prevalence of 96 and 136 anomalies per 1000 births in the first year of life and by age 6 years, respectively. Analysis of continuous PM with diameter < 2.5 μm (PM2.5) indicated a supra-linear relation with anomalies in the circulatory, respiratory, digestive, genital and integument systems (79 % of CAs). The slope of the concentration-response function was positive and steepest for PM2.5 lower than the median concentration (21.5 μg/m3) and had a less steep or negative slope at higher levels. Similar trends were observed for PM2.5 quartiles. For example, for cardiac anomalies, the ORs were 1.09 (95 % confidence interval: 1.02, 1.15), 1.04 (0.98, 1.10) and 1.00 (0.94, 1.07) for births in the second, third and fourth quartiles, respectively, when compared to the first quartile. In sum, this study adds new evidence for adverse effects of air pollution on neonatal health even with low-level air pollution. Information on late diagnosis of children with anomalies is important in evaluating the burden of disease.
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Affiliation(s)
- Ronit Nirel
- Department of Statistics and Data Science, The Hebrew University of Jerusalem, Jerusalem, Israel.
| | - Tomer Shoham
- Department of Statistics and Data Science, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ran Rotem
- Maccabi Institute of Research and Innovation, Maccabi Healthcare Services, Tel-Aviv, Israel; Department of Environmental Health, Harvard TH Chan School of Public Health, Boston, MA, United States
| | - Wiessam Abu Ahmad
- Braun School of Public Health and Community Medicine, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Gideon Koren
- The Dr. Miriam and Sheldon G. Adelson Medical School, Ariel University, Ariel, Israel
| | - Itai Kloog
- Department of Geography and Environmental Development, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Rachel Golan
- Department of Epidemiology, Biostatistics and Community Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Hagai Levine
- Braun School of Public Health and Community Medicine, Hadassah Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
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Zhou W, Ming X, Chen Q, Liu X, Yin P. The acute effect and lag effect analysis between exposures to ambient air pollutants and spontaneous abortion: a case-crossover study in China, 2017-2019. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:67380-67389. [PMID: 35522417 PMCID: PMC9492619 DOI: 10.1007/s11356-022-20379-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 04/18/2022] [Indexed: 05/17/2023]
Abstract
INTRODUCTION Recent studies demonstrated that living in areas with high ambient air pollution may have adverse effects on pregnancy outcomes, but few studies have investigated its association with spontaneous abortion. Further investigation is needed to explore the acute effect and lag effect of air pollutants exposure on spontaneous abortion. OBJECTIVE To investigate the acute effect and lag effect between exposure to ambient air pollutants and spontaneous abortion. METHODS Research data of spontaneous abortion were collected from the Chongqing Health Center for Women and Children (CQHCWC) in China. The daily ambient air pollution exposure measurements were estimated for each woman using inverse distance weighting from monitoring stations. A time-stratified, case-crossover design combined with distributed lag linear models was applied to assess the associations between spontaneous pregnancy loss and exposure to each of the air pollutants over lags 0-7 days, adjusted for temperature and relative humidity. RESULTS A total of 1399 women who experienced spontaneous pregnancy loss events from November 1, 2016, to September 30, 2019, were selected for this study. Maternal exposure to particulate matter 2.5 (PM2.5), particle matter 10 (PM10) nitrogen dioxide (NO2), and sulfur dioxide (SO2) exhibited a significant association with spontaneous abortion. For every 20 μg/m3 increase in PM2.5, PM10, NO2, and SO2, the RRs were 1.18 (95% CI: 1.06, 1.34), 1.12 (95% CI, 1.04-1.20), 1.15 (95% CI: 1.02, 1.30), and 1.92 (95% CI: 1.18, 3.11) on lag day 3, lag day 3, lag day 0, and lag day 3, respectively. In two-pollutant model combined with PM2.5 and PM10, a statistically significant increase in spontaneous abortion incidence of 18.0% (RR = 1.18, 95% CI: 1.06, 1.32) was found for a 20 μg/m3 increase in PM2.5 exposure, and 11.2% (RR = 1.11, 95% CI: 1.03, 1.20) for a 20 μg/m3 increase in PM10 exposure on lag day 3, similar to single-pollutant model analysis. CONCLUSION Maternal exposure to high levels of PM2.5, PM10, NO2, and SO2 during pregnancy may increase the risk of spontaneous abortion for acute effects and lag effects. Further research to explore sensitive exposure time windows is needed.
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Affiliation(s)
- Wenzheng Zhou
- Chongqing Health Center for Women and Children, Chongqing, 401147, China
| | - Xin Ming
- Chongqing Health Center for Women and Children, Chongqing, 401147, China
| | - Qing Chen
- Institute of Toxicology, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Xiaoli Liu
- Chongqing Health Center for Women and Children, Chongqing, 401147, China.
| | - Ping Yin
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
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9
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Zhou W, Ming X, Yang Y, Hu Y, He Z, Chen H, Li Y, Zhou X, Yin P. Association between Maternal Exposure to Ambient Air Pollution and the Risk of Preterm Birth: A Birth Cohort Study in Chongqing, China, 2015-2020. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19042211. [PMID: 35206398 PMCID: PMC8871940 DOI: 10.3390/ijerph19042211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 02/07/2022] [Accepted: 02/09/2022] [Indexed: 12/16/2022]
Abstract
Recent study results on the association between maternal exposure to ambient air pollution with preterm birth have been inconsistent. The sensitive window of exposure and influence level of air pollutants varied greatly. We aimed to explore the association between maternal exposure to ambient air pollutants and the risk of preterm birth, and to estimate the sensitive exposure time window. A total of 572,116 mother–newborn pairs, daily concentrations of air pollutants from nearest monitoring stations were used to estimate exposures for each participant during 2015–2020 in Chongqing, China. We applied a generalized additive model and estimated RRs and 95% CIs for preterm birth in each trimester and the entire pregnancy period. In the single-pollutant model, we observed that each 10 μg/m3 increase in PM2.5 had a statistically significant effect on the third trimester and entire pregnancy, with RR = 1.036 (95% CI: 1.021, 1.051) and RR = 1.101 (95% CI: 1.075, 1.128), respectively. Similarly, for each 10 μg/m3 increase in PM10, there were 2.7% (RR = 1.027, 95% CI: 1.016, 1.038) increase for PTB on the third trimester, and 3.8% (RR = 1.038, 95% CI: 1.020, 1.057) increase during the whole pregnancy. We found that for each 10 mg/m3 CO increases, the relative risk of PTB increased on the first trimester (RR = 1.081, 95% CI: 1.007, 1.162), second trimester (RR = 1.116, 95% CI: 1.035, 1.204), third trimester (RR = 1.167, 95% CI: 1.090, 1.250) and whole pregnancy (RR = 1.098, 95% CI: 1.011, 1.192). No statistically significant RR was found for SO2 and NO2 on each trimester of pregnancy. Our study indicates that maternal exposure to high levels of PM2.5 and PM10 during pregnancy may increase the risk for preterm birth, especially for women at the late stage of pregnancy. Statistically increased risks of preterm birth were associated with CO exposure during each trimester and entire pregnancy. Reducing exposure to ambient air pollutants for pregnant women is clearly necessary to improve the health of infants.
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Affiliation(s)
- Wenzheng Zhou
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China;
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
| | - Xin Ming
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
| | - Yunping Yang
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
| | - Yaqiong Hu
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
| | - Ziyi He
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
| | - Hongyan Chen
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
| | - Yannan Li
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
| | - Xiaojun Zhou
- Chongqing Health Center for Women and Children, Chongqing 401147, China; (X.M.); (Y.Y.); (Y.H.); (Z.H.); (H.C.); (Y.L.)
- Correspondence: (X.Z.); (P.Y.)
| | - Ping Yin
- Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China;
- Correspondence: (X.Z.); (P.Y.)
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10
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Miao H, Wu H, Zhu Y, Kong L, Yu X, Zeng Q, Chen Y, Zhang Q, Guo P, Wang D. Congenital anomalies associated with ambient temperature variability during fetal organogenesis period of pregnancy: Evidence from 4.78 million births. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 798:149305. [PMID: 34340080 DOI: 10.1016/j.scitotenv.2021.149305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/13/2021] [Accepted: 07/23/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUNDS Evidence for the effects of temperature variability on risk of congenital anomalies is lacking. We aimed to examine the association of temperature variability during fetal organogenesis period (weeks 3-8 post-conception) with major congenital anomalies. METHODS A retrospective cohort study comprising 4,787,356 singleton live-births and stillbirths in China was performed. We defined two temperature variability indices within gestational week i: the standard deviation (SD) of daily temperature (TVSDi) and the maximum day-to-day temperature difference (TVDi). At 6-week long timescales, we computed the SD of daily temperature (TVSD3-8) and the average value of TVDi (TVD3-8). We matched two temperature variability indices, pollutant exposure levels over entire exposure window and data of each mother-infant pairs. An extended generalized estimating equation log-binomial regression model was constructed to explore their associations after adjusting for individual characters, temperature extremes and air pollutants. Stratified and sensitivity analyses were also performed. RESULTS 59,571 neonates were registered as major congenital anomalies besides genetic and chromosomal anomalies. At weekly levels, the highest risk estimates of two temperature variability indices occurred at the 5th week for most anomaly groups. All TVSD5, TVD5, and maximum weekly TVSD and TVD were significantly associated with all anomaly groups; with the increment of 1 °C, the estimated risk ratio (RR) and corresponding 95% confidence interval (CI) ranges from 1.03 (1.01-1.05) to 1.19 (1.08-1.31). At 6-week scales, TVSD3-8 and TVD3-8 were associated with most anomaly subgroups. Overall, the strongest associations were estimated for isolated defects among morphology subgroups and cardiac defects among type subgroups. CONCLUSIONS Exposure to temperature variability during fetal organogenesis period of pregnancy is associated with increased risk of major congenital defects. Our findings provide a research foundation for public health policies, and further mechanism investigation.
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Affiliation(s)
- Huazhang Miao
- School of Health Management, Southern Medical University, Guangzhou 510515, Guangdong Province, China; Guangdong Women and Children Hospital, No.521 Xingnan Road, Guangzhou 511442, China
| | - Haisheng Wu
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Yingxian Zhu
- Guangdong Women and Children Hospital, No.521 Xingnan Road, Guangzhou 511442, China
| | - Lei Kong
- LAPC & ICCES, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaolin Yu
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Qinghui Zeng
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Yuliang Chen
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, China
| | - Qingying Zhang
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, China.
| | - Pi Guo
- Department of Preventive Medicine, Shantou University Medical College, Shantou 515041, China; Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou 515041, China.
| | - Dong Wang
- School of Health Management, Southern Medical University, Guangzhou 510515, Guangdong Province, China.
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11
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Li W, Zuo L, Ni Y, Xiao D, Mo W, Wen Z, Zhao J, Zhang J, Yang L. Interpregnancy interval and subsequent perinatal risk of congenital heart disease in Guangzhou, Southern China: a retrospective cohort study, 2014-2019. J Matern Fetal Neonatal Med 2021; 35:8989-8997. [PMID: 34847800 DOI: 10.1080/14767058.2021.2008898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND The association between maternal interpregnancy interval (IPI) and congenital heart disease (CHD) in neonates remains inconclusive. This study aimed to examine the effect of maternal IPI on birth risk of CHD. METHODS Chinese women with two consecutive singleton deliveries in Guangzhou between January 2014 and December 2019 were selected as participants. Information on IPI and CHD was extracted from the Guangzhou Perinatal Health Care and Delivery Registry and the Guangzhou Birth Defects Surveillance Program. We stratified IPI into four categories: <24 months, 24-35 months, 36-59 months, and ≥60 months. A multivariate logistic regression model was used to examine the association between IPI and CHD. Subgroup analysis was also performed to assess whether the associations differed across top three CHD subtypes. RESULTS For 119,510 women enrolled in this study, the mean ages at two consecutive deliveries were 26.2 ± 3.8 and 28.8 ± 4.0 years, which yielded a median IPI of 51.2 (interquartile range, 32.1-77.2) months. Among them, 828 delivered infants with CHD during their second pregnancy. There was a J-shaped curve relationship between IPI and CHD with the lowest birth prevalence (5.33‰) at 24-35-month interval. Compared to women with an IPI of 24-35 months, those with an IPI ≥60 had an increased risk of delivering infants with CHD (adjusted odds ratio (OR), 1.41; 95% confidence interval (CI), 1.19-1.64). However, for those with an IPI <24 months (adjusted OR, 1.24; 95% CI, 0.97-1.51), IPI was statistically insignificant associated with the risk of delivering infants with CHD (p = .12). There were different patterns of associations for different CHD subtypes. CONCLUSIONS Longer maternal IPI (≥60 months) was associated with an increased risk of delivering infants with CHD in the Chinese population.
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Affiliation(s)
- Weidong Li
- Department of Woman and Child Health Care Information, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Liandong Zuo
- Department of Science Research and Education Management, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Yanyan Ni
- Institute for Women's Health, University College London, London, UK
| | - Di Xiao
- Department of Woman and Child Health Care Information, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Weijian Mo
- Department of Woman and Child Health Care Information, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Zihao Wen
- Department of Woman and Child Health Care Information, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Jing Zhao
- Department of Woman and Child Health Care Information, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Jinxin Zhang
- School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Li Yang
- Department of Woman and Child Health Care Information, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
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12
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Lee KS, Lim YH, Choi YJ, Kim S, Bae HJ, Han C, Lee YA, Hong YC. Prenatal exposure to traffic-related air pollution and risk of congenital diseases in South Korea. ENVIRONMENTAL RESEARCH 2020; 191:110060. [PMID: 32805245 DOI: 10.1016/j.envres.2020.110060] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/02/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Previous studies have suggested links between exposure to ambient air pollutants and increased risk of congenital heart defects. However, few studies have investigated the association between other congenital diseases and traffic-related air pollution. In this study, we assessed the relationship between prenatal exposure to fine particulate matter (PM2.5) and nitrogen dioxide (NO2) with congenital diseases in South Korea. METHODS Patients with one or more congenital diseases and a control group of patients with non-infective gastroenteritis and colitis with a case:control ratio of 1:3 were obtained from the National Health Insurance Service data for 2008-2013 in South Korea. We estimated the associations of PM2.5 and NO2 exposures with congenital diseases using generalized estimation equations after controlling for covariates. RESULTS Maternal PM2.5 exposure during the first and second trimester showed positive associations with overall congenital diseases, with changes of 14.7% (95% confidence intervals (CI), 9.3%, 20.3%) and 16.2% (95% CI, 11.0%, 21.7%), respectively, per 11.1 μg/m3 and 10.2 μg/m3 increase of PM2.5 interquartile range (IQR). Similarly, NO2 exposure during the first and second trimester was associated with increased numbers of overall congenital anomalies, with 8.2% (95% CI, 4.2%, 12.3%) and 15.6% (95% CI, 9.3%, 22.2%) more cases, respectively, per 10.6 ppb increase of NO2. We found that maternal PM2.5 exposure during the first and second trimesters of pregnancy was significantly associated with increased risk of specific congenital diseases, including subtypes affecting the circulatory, genitourinary, and musculoskeletal system. However, no significant associations were observed during the third trimester. Maternal NO2 exposure across the entire pregnancy was associated with malformations of the musculoskeletal system. CONCLUSIONS Our study identified significant links between in utero exposure to PM2.5 and NO2 and certain congenital diseases, and suggests that stricter controls on PM2.5 and NO2 concentrations are required.
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Affiliation(s)
- Kyung-Shin Lee
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, 03080, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, 03080, South Korea.
| | - Youn-Hee Lim
- Section of Environmental Health, Department of Public Health, University of Copenhagen, Copenhagen, 1014, Denmark; Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, 03080, South Korea.
| | - Yoon-Jung Choi
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, 03080, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, 03080, South Korea.
| | - Soontae Kim
- Department of Environmental and Safety Engineering, Ajou University, Suwon, 16499, South Korea.
| | - Hyun Joo Bae
- Korea Environment Institute, Sejong, 30147, South Korea.
| | - Changwoo Han
- Department of Preventive Medicine and Public Health Chungnam National University College of Medicine, Daejeon, 35015, South Korea.
| | - Young Ah Lee
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, 03080, South Korea.
| | - Yun-Chul Hong
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, 03080, South Korea; Environmental Health Center, Seoul National University College of Medicine, Seoul, 03080, South Korea; Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, 03080, South Korea.
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13
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Lin YC, Li YC, Amesho KTT, Shangdiar S, Chou FC, Cheng PC. Chemical characterization of PM 2.5 emissions and atmospheric metallic element concentrations in PM 2.5 emitted from mobile source gasoline-fueled vehicles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 739:139942. [PMID: 32540664 DOI: 10.1016/j.scitotenv.2020.139942] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 05/28/2020] [Accepted: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Fine particulate matter with an aerodynamic diameter of <2.5 μm (PM2.5), particularly from the in-use gasoline-fueled vehicles, is a leading air quality pollutant and the chemical composition of PM2.5 is vital to the practical issues of climate change, health effects, and pollution control policies, inter alia. These atmospheric fine particulate matters (PM2.5) emitted from the exhausts of mobile source gasoline-fueled vehicles constitute substantial risks to human health through inhalation, and most importantly, affect urban air quality. Therefore, in order to explicitly determine the inhalation risks of PM2.5 which could potentially contain a significant amount of chemicals and metallic elements (MEs) concentration, we investigated the chemical composition (comprising of carbonaceous species and metallic elements) of PM2.5 emissions from mobile source gasoline-fueled vehicles. To further examine the chemical composition and metallic elements concentration in PM2.5 from the exhausts of mobile source gasoline-fueled vehicles, we systematically investigated PM2.5 emission samples collected from the exhausts of fifteen (15) mobile source gasoline-fueled vehicles. Our study has equally also determined the chemical compositions based on carbonaceous species (organic carbon - OC and elemental carbon - EC). Furthermore, the concentrations of PM2.5 and metallic elements (Ca, Al, Zn, K, Ca, Fe, Mg and Cr) in PM2.5 were analyzed with the help of Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The details of the tested gasoline-fueled vehicles cover the model years, consisting of the vehicles registered from 2000 to 2017 from several vehicle manufacturers (or brands) with various running mileages ranging from 123.4 to 575,844 km (average 123,105 km). Our results established that elemental carbon (EC) and organic carbon (OC) were the most significant concentrations of carbonaceous species. The concentration of metallic elements in PM2.5 and chemical characterization were studied by their relationship with atmospheric PM2.5 and the results showed that the metallic elements concentration in PM2.5 were in descending order as follows: Ca > Al > Zn > K > Fe > Mg > Cr. These results will help us to further understand how PM2.5 emissions from the exhausts of in-use gasoline-fueled vehicles contribute to both chemical and atmospheric metallic elements concentration in the ambient air.
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Affiliation(s)
- Yuan-Chung Lin
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; Center for Emerging Contaminants Research, National Sun Yat-Sen University, Kaohsiung 804, Taiwan.
| | - Ya-Ching Li
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Kassian T T Amesho
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Sumarlin Shangdiar
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Feng-Chih Chou
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | - Pei-Cheng Cheng
- Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
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Filonchyk M, Hurynovich V. Spatial distribution and temporal variation of atmospheric pollution in the South Gobi Desert, China, during 2016-2019. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:26579-26593. [PMID: 32372352 DOI: 10.1007/s11356-020-09000-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
The rapid pace of economic growth and urbanization in China affects both large and small cities of the country, causing an increase of pollutant concentrations in the air. The South Gobi is one of the main deserts and semidesert regions of the country; therefore, the study of air pollution near the potential source of natural aerosols is of great importance. Data obtained in the period from 1 January 2016 to 31 December 2019 was used to analyze spatial-temporal characteristics of atmospheric pollutants (PM2.5, PM10, SO2, NO2, and CO) in eight cities. Total mean concentrations of PM2.5 and PM10 were 36.1 ± 21.1 μg/m3 and 98.6 ± 108.7 μg/m3. The occurrence rates of concentrations exceeding the Chinese National Ambient Air Quality Standard (CNAAQS) grade 1 and grade 2 were 40.1% and 5.4% for PM2.5 and 82.9% and 11.64% for PM10 in the region. Total concentrations of SO2, NO2, and CO did not exceed the CNAAQS standard and were 20.8 ± 23.6 μg/m3, 22.6 ± 11.9 μg/m3, and 0.72 ± 0.39 mg/m3, respectively. The PM2.5 to PM10 ratio increased from 0.35 in spring to 0.46 in winter suggesting the predominance of coarse aerosol fractions in the atmosphere. Based on data on aerosol optical depth (AOD) and Ångström exponent (AE) ratio obtained from Moderate Resolution Imaging Spectroradiometer (MODIS), the predominant aerosol types in the region are Clean Сontinental and Mixed. Maximum concentrations of pollutants and the highest AOD values in the region air are observed in spring and winter. Results set forth in this article will be an important basis for further regional studies on air quality and distribution of sources.
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Affiliation(s)
- Mikalai Filonchyk
- Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou, 730070, China.
- Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou, 730070, China.
| | - Volha Hurynovich
- Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou, 730070, China
- Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou, 730070, China
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