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Nie W, Guo L, Liu Q, Hua Y, Xue Q, Sun N. Study on the coupling pollution law of dust and gas and determination of the optimal purification position of air duct during tunnel excavation. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117843] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ziembicki S, Kirkham TL, Demers PA, Peters CE, Gorman Ng M, Davies HW, Tenkate T, Kalenge S, Blagrove-Hall N, Jardine KJ, Arrandale VH. Diesel Engine Exhaust Exposure in the Ontario Civil Infrastructure Construction Industry. Ann Work Expo Health 2021; 66:150-162. [PMID: 34585719 DOI: 10.1093/annweh/wxab068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 07/26/2021] [Accepted: 08/06/2021] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Diesel engine exhaust (DEE) is a known lung carcinogen and a common occupational exposure in Canada. The use of diesel-powered equipment in the construction industry is particularly widespread, but little is known about DEE exposures in this work setting. The objective of this study was to determine exposure levels and identify and characterize key determinants of DEE exposure at construction sites in Ontario. METHODS Elemental carbon (EC, a surrogate of DEE exposure) measurements were collected at seven civil infrastructure construction worksites and one trades training facility in Ontario using NIOSH method 5040. Full-shift personal air samples were collected using a constant-flow pump and SKC aluminium cyclone with quartz fibre filters in a 37-mm cassette. Exposures were compared with published health-based limits, including the Dutch Expert Committee on Occupational Safety (DECOS) limit (1.03 µg m-3 respirable EC) and the Finnish Institute of Occupational Health (FIOH) recommendation (5 µg m-3 respirable EC). Mixed-effects linear regression was used to identify determinants of EC exposure. RESULTS In total, 149 EC samples were collected, ranging from <0.25 to 52.58 µg m-3 with a geometric mean (GM) of 3.71 µg m-3 [geometric standard deviation (GSD) = 3.32]. Overall, 41.6% of samples exceeded the FIOH limit, mostly within underground worksites (93.5%), and 90.6% exceeded the DECOS limit. Underground workers (GM = 13.20 µg m-3, GSD = 1.83) had exposures approximately four times higher than below grade workers (GM = 3.56 µg m-3, GSD = 1.94) and nine times higher than above ground workers (GM = 1.49 µg m-3, GSD = 1.75). Training facility exposures were similar to above ground workers (GM = 1.86 µg m-3, GSD = 4.12); however, exposures were highly variable. Work setting and enclosed cabins were identified as the key determinants of exposure in the final model (adjusted R2 = 0.72, P < 0.001). The highest DEE exposures were observed in underground workplaces and when using unenclosed cabins. CONCLUSIONS This study provides data on current DEE exposure in Canadian construction workers. Most exposures were above recommended health-based limits, albeit in other jurisdictions, signifying a need to further reduce DEE levels in construction. These results can inform a hazard reduction strategy including targeted intervention/control measures to reduce DEE exposure and the burden of occupational lung cancer.
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Affiliation(s)
- Stephanie Ziembicki
- Occupational Cancer Research Centre, Ontario Health, Toronto, ON, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - Tracy L Kirkham
- Occupational Cancer Research Centre, Ontario Health, Toronto, ON, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - Paul A Demers
- Occupational Cancer Research Centre, Ontario Health, Toronto, ON, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.,School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Cheryl E Peters
- Department of Cancer Epidemiology and Prevention Research, Alberta Health Services, Holy Cross Centre, AB, Canada.,Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB, Canada.,Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,CAREX Canada, Faculty of Health Sciences, Simon Fraser University, Vancouver, BC, Canada
| | - Melanie Gorman Ng
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada.,BC Construction Safety Alliance, New Westminster, BC, Canada
| | - Hugh W Davies
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Thomas Tenkate
- School of Occupational and Public Health, Ryerson University, Toronto, ON, Canada
| | - Sheila Kalenge
- Occupational Cancer Research Centre, Ontario Health, Toronto, ON, Canada
| | | | | | - Victoria H Arrandale
- Occupational Cancer Research Centre, Ontario Health, Toronto, ON, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
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Liu H, Li J, Ma Q, Tang J, Jiang M, Cao X, Lin L, Kong N, Yu S, Sood A, Zheng Y, Leng S, Han W. Chronic exposure to diesel exhaust may cause small airway wall thickening without lumen narrowing: a quantitative computerized tomography study in Chinese diesel engine testers. Part Fibre Toxicol 2021; 18:14. [PMID: 33766066 PMCID: PMC7992811 DOI: 10.1186/s12989-021-00406-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 03/12/2021] [Indexed: 01/23/2023] Open
Abstract
Background Diesel exhaust (DE) is a major source of ultrafine particulate matters (PM) in ambient air and contaminates many occupational settings. Airway remodeling assessed using computerized tomography (CT) correlates well with spirometry in patients with obstructive lung diseases. Structural changes of small airways caused by chronic DE exposure is unknown. Wall and lumen areas of 6th and 9th generations of four candidate airways were quantified using end-inhalation CT scans in 78 diesel engine testers (DET) and 76 non-DETs. Carbon content in airway macrophage (CCAM) in sputum was quantified to assess the dose-response relationship. Results Environmental monitoring and CCAM showed a much higher PM exposure in DETs, which was associated with higher wall area and wall area percent for 6th generation of airways. However, no reduction in lumen area was identified. No study subjects met spirometry diagnosis of airway obstruction. This suggested that small airway wall thickening without lumen narrowing may be an early feature of airway remodeling in DETs. The effect of DE exposure status on wall area percent did not differ by lobes or smoking status. Although the trend test was of borderline significance between categorized CCAM and wall area percent, subjects in the highest CCAM category has a 14% increase in wall area percent for the 6th generation of airways compared to subjects in the lowest category. The impact of DE exposure on FEV1 can be partially explained by the wall area percent with mediation effect size equal to 20%, Pperm = 0.028). Conclusions Small airway wall thickening without lumen narrowing may be an early image feature detected by CT and underlie the pathology of lung injury in DETs. The pattern of changes in small airway dimensions, i.e., thicker airway wall without lumen narrowing caused by occupational DE exposure was different to that (i.e., thicker airway wall with lumen narrowing) seen in our previous study of workers exposed to nano-scale carbon black aerosol, suggesting constituents other than carbon cores may contribute to such differences. Our study provides some imaging indications of the understanding of the pulmonary toxicity of combustion derived airborne particulate matters in humans. Supplementary Information The online version contains supplementary material available at 10.1186/s12989-021-00406-1.
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Affiliation(s)
- Hong Liu
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, 266021, China
| | - Jianyu Li
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Qianli Ma
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, 266021, China
| | - Jinglong Tang
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Menghui Jiang
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Xue Cao
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Li Lin
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, 266021, China
| | - Nan Kong
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Shanfa Yu
- Henan Institute of Occupational Medicine, Zhengzhou, Henan, China
| | - Akshay Sood
- Department of Internal Medicine, School of Medicine, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Yuxin Zheng
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China.
| | - Shuguang Leng
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China. .,Department of Internal Medicine, School of Medicine, University of New Mexico, Albuquerque, NM, 87131, USA. .,Cancer Control and Population Sciences, University of New Mexico Comprehensive Cancer Center, Albuquerque, NM, 87131, USA.
| | - Wei Han
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, 266021, China.
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Estimation of an Exposure Threshold Value for Compensation of Silica-Induced COPD Based on Longitudinal Changes in Pulmonary Function. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17239040. [PMID: 33291582 PMCID: PMC7729997 DOI: 10.3390/ijerph17239040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 11/24/2020] [Accepted: 12/02/2020] [Indexed: 11/17/2022]
Abstract
(1) Background: To estimate the cumulative exposure to respirable crystalline silica (RCS) that reduces lung function to an extent corresponding with airway obstruction equivalent to chronic obstructive pulmonary disease (COPD). (2) Methods: The study is based on a miners' cohort with longitudinal data on lung function and RCS exposure. Random-effects linear regression models, allowing for a possible threshold concerning the exposure concentration were used to analyze the impact of RCS on the ratio of forced expiratory volume in 1 s and forced vital capacity (FEV1/FVC). The proposed threshold is the amount of RCS resulting in a decrease in FEV1/FVC from the expected value to the lower limit of normal. (3) Results: The analysis shows that a threshold model fits the data significantly better than the usual linear model. The estimated threshold value for the exposure concentration is 0.089 mg/m3. Using this threshold, the estimate for the corresponding reference dose for RCS is 2.33 mg/m3·y. (4) Conclusions: The analysis confirmed that RCS has a negative impact on lung function. The effect is primarily due to exposure above a concentration threshold of 0.1 mg/m3. It is recommended that COPD should be compensated as an occupational disease if cumulative exposure was at least 2 mg/m3·y above this threshold.
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Du M, Hall GL, Franklin P, Musk AB, Mullins BJ, de Klerk N, Elliott NSJ, Sodhi-Berry N, Brims F, Reid A. Association between diesel engine exhaust exposure and lung function in Australian gold miners. Int J Hyg Environ Health 2020; 226:113507. [PMID: 32160584 DOI: 10.1016/j.ijheh.2020.113507] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/10/2020] [Accepted: 02/28/2020] [Indexed: 12/25/2022]
Abstract
Previous studies have reported that miners (and other workers) exposed to high levels of diesel engine exhaust (DEE) have an increased risk of lung function decline. The main objective of this study was to evaluate associations between exposure to different components associated with DEE in relation to lung function across a 12-h working shift. Eighty underground gold miners and twenty surface miners completed spirometry and questionnaires at the beginning and end of their 12 h work shift. Personal exposure to elemental carbon (EC), volatile organic compounds (VOCs), nitrogen dioxide (NO2), particle size and particle number were monitored during their shift. Multiple regression models were used to examine the associations between DEE and lung function, adjusting for a range of covariates. Underground miners were exposed to higher levels of EC, VOCs, NO2, and particle number and larger mean particle size than surface miners. Cross-shift reduction in Z-score value of FEV1/FVC in underground miners was statistically significantly greater than those of surface miners. The cross-shift change in Z-score value of FEV1/FVC was associated with exposure to higher concentration of EC and particle number, but not with VOCs, NO2 and particle size. Occupational exposure to diesel engine exhaust in current Australian gold mines is substantial. Exposures were higher in underground miners and had a negative association with their lung function over a single 12-h shift.
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Affiliation(s)
- Mengran Du
- School of Public Health, Curtin University, Bentley, Western Australia, Australia
| | - Graham L Hall
- Telethon Kids Institute, 15 Hospital Avenue, Nedlands, Western Australia, Australia; School of Physiotherapy and Exercise Science, Curtin University, Bentley, Western Australia, Australia
| | - Peter Franklin
- School of Population and Global Health, University of Western Australia, Crawley, Western Australia, Australia
| | - Aw Bill Musk
- School of Population and Global Health, University of Western Australia, Crawley, Western Australia, Australia; Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
| | - Benjamin J Mullins
- School of Public Health, Curtin University, Bentley, Western Australia, Australia
| | - Nicholas de Klerk
- Telethon Kids Institute, 15 Hospital Avenue, Nedlands, Western Australia, Australia; School of Population and Global Health, University of Western Australia, Crawley, Western Australia, Australia
| | - Novak S J Elliott
- School of Public Health, Curtin University, Bentley, Western Australia, Australia
| | - Nita Sodhi-Berry
- School of Population and Global Health, University of Western Australia, Crawley, Western Australia, Australia
| | - Fraser Brims
- Department of Respiratory Medicine, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia; Curtin Medical School, Curtin University, Bentley, Western Australia, Australia
| | - Alison Reid
- School of Public Health, Curtin University, Bentley, Western Australia, Australia.
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Hart JE, Grady ST, Laden F, Coull BA, Koutrakis P, Schwartz JD, Moy ML, Garshick E. Effects of Indoor and Ambient Black Carbon and [Formula: see text] on Pulmonary Function among Individuals with COPD. ENVIRONMENTAL HEALTH PERSPECTIVES 2018; 126:127008. [PMID: 30570336 PMCID: PMC6371657 DOI: 10.1289/ehp3668] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 11/05/2018] [Accepted: 11/26/2018] [Indexed: 05/25/2023]
Abstract
BACKGROUND Particulate matter (PM) air pollution has been associated with decreased pulmonary function, but the exposure–response relationship in chronic obstructive pulmonary disease (COPD) patients is uncertain, and most studies have only focused on exposures to ambient pollution. OBJECTIVES We aimed to assess associations between pulmonary function and indoor and ambient PM [Formula: see text] ([Formula: see text]) and black carbon (BC). METHODS Between November 2012 and December 2014, 125 patients with COPD (mean age, 73.4 y) who were not currently smoking and without known indoor BC sources were recruited. Indoor BC and [Formula: see text] were measured in each home for a week in each season, up to four times a year, followed by in-person spirometry pre- and post-bronchodilator. Ambient exposures were available from a central site monitor. Multivariable adjusted mixed effects regression models were used to assess associations scaled per interquartile range (IQR) of exposure. RESULTS There were 367 study visits; the median (IQR) indoor BC and [Formula: see text] were 0.19 (0.22) [Formula: see text] and 6.67 (5.80) [Formula: see text], respectively. Increasing indoor exposures to BC were associated with decreases in pre-bronchodilator forced expiratory volume in 1 s [Formula: see text] and forced vital capacity (FVC), and [Formula: see text]. For example, in multivariable adjusted models, each IQR increase in indoor BC from the weekly integrated filter was associated with a [Formula: see text] [95% confidence interval (CI): [Formula: see text], [Formula: see text]] decrease in pre-bronchodilator [Formula: see text]. Increases in indoor [Formula: see text] were associated with decreases in [Formula: see text] and FVC of smaller magnitude than those for indoor BC; however, the results were less precise. Ambient BC was not associated with pre-bronchodilator pulmonary function, ambient [Formula: see text] was only associated with decreases in FVC and increases in [Formula: see text], and neither indoor nor ambient BC or [Formula: see text] were associated with post-bronchodilator pulmonary function. CONCLUSIONS Low-level exposures to indoor BC and [Formula: see text], but not ambient exposures, were consistently associated with decreases in pre-bronchodilator pulmonary function. There was no association between exposures and post-bronchodilator pulmonary function. https://doi.org/10.1289/EHP3668.
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Affiliation(s)
- Jaime E Hart
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Stephanie T Grady
- Research and Development Service, Veterans Administration Boston Health Care System, Boston, Massachusetts, USA
| | - Francine Laden
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Brent A Coull
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Petros Koutrakis
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Joel D Schwartz
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Marilyn L Moy
- Pulmonary, Allergy, Sleep and Critical Care Medicine, Veterans Administration Boston Healthcare System and Harvard Medical School, Boston, Massachusetts, USA
| | - Eric Garshick
- Pulmonary, Allergy, Sleep and Critical Care Medicine, Veterans Administration Boston Healthcare System and Harvard Medical School, Boston, Massachusetts, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
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Chao TP, Sperandio EF, Ostolin TLVP, Almeida VR, Romiti M, Gagliardi ART, Arantes RL, Dourado VZ. Use of cardiopulmonary exercise testing to assess early ventilatory changes related to occupational particulate matter. ACTA ACUST UNITED AC 2018; 51:e6486. [PMID: 29590255 PMCID: PMC5886555 DOI: 10.1590/1414-431x20186486] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 01/04/2018] [Indexed: 11/27/2022]
Abstract
Spirometry has been used as the main strategy for assessing ventilatory changes related to occupational exposure to particulate matter (OEPM). However, in some cases, as one of its limitations, it may not be sensitive enough to show abnormalities before extensive damage, as seen in restrictive lung diseases. Therefore, we hypothesized that cardiopulmonary exercise testing (CPET) may be better than spirometry to detect early ventilatory impairment caused by OEPM. We selected 135 male workers with at least one year of exposure. After collection of self-reported socioeconomic status, educational level, and cardiovascular risk data, participants underwent spirometry, CPET, body composition assessment (bioelectrical impedance), and triaxial accelerometry (for level of physical activity in daily life). CPET was performed using a ramp protocol on a treadmill. Metabolic, cardiovascular, ventilatory, and submaximal relationships were measured. We compared 52 exposed to 83 non-exposed workers. Multiple linear regressions were developed using spirometry and CPET variables as outcomes and OEPM as the main predictor, and adjusted by the main covariates. Our results showed that OEPM was associated with significant reductions in peak minute ventilation, peak tidal volume, and breathing reserve index. Exposed participants presented shallower slope of ΔVT/ΔlnV̇E (breathing pattern), i.e., increased tachypneic breathing pattern. The OEPM explained 7.4% of the ΔVT/ΔlnV̇E variability. We found no significant influence of spirometric indices after multiple linear regressions. We conclude that CPET might be a more sensitive feature of assessing early pulmonary impairment related to OEPM. Our cross-sectional results suggested that CPET is a promising tool for the screening of asymptomatic male workers.
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Affiliation(s)
- T P Chao
- Laboratório de Epidemiologia e Movimento Humano, Departamento de Ciências do Movimento Humano, Universidade Federal de São Paulo, Santos, SP, Brasil
| | - E F Sperandio
- Laboratório de Epidemiologia e Movimento Humano, Departamento de Ciências do Movimento Humano, Universidade Federal de São Paulo, Santos, SP, Brasil
| | - T L V P Ostolin
- Laboratório de Epidemiologia e Movimento Humano, Departamento de Ciências do Movimento Humano, Universidade Federal de São Paulo, Santos, SP, Brasil
| | - V R Almeida
- Laboratório de Epidemiologia e Movimento Humano, Departamento de Ciências do Movimento Humano, Universidade Federal de São Paulo, Santos, SP, Brasil
| | - M Romiti
- Instituto de Medicina Cardiovascular Angiocorpore, Santos, SP, Brasil
| | - A R T Gagliardi
- Instituto de Medicina Cardiovascular Angiocorpore, Santos, SP, Brasil
| | - R L Arantes
- Instituto de Medicina Cardiovascular Angiocorpore, Santos, SP, Brasil
| | - V Z Dourado
- Laboratório de Epidemiologia e Movimento Humano, Departamento de Ciências do Movimento Humano, Universidade Federal de São Paulo, Santos, SP, Brasil
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Hoet P, Desvallées L, Lison D. Do current OELs for silica protect from obstructive lung impairment? A critical review of epidemiological data. Crit Rev Toxicol 2017; 47:650-677. [DOI: 10.1080/10408444.2017.1315363] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Perrine Hoet
- Louvain Center for Toxicology and Applied Pharmacology (LTAP), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain, Bruxelles, Belgium
| | - Laure Desvallées
- Louvain Center for Toxicology and Applied Pharmacology (LTAP), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain, Bruxelles, Belgium
| | - Dominique Lison
- Louvain Center for Toxicology and Applied Pharmacology (LTAP), Institute of Experimental and Clinical Research (IREC), Université Catholique de Louvain, Bruxelles, Belgium
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Hao Y, Zhang G, Han B, Xu X, Feng N, Li Y, Wang W, Kan H, Bai Z, Zhu Y, Au W, Xia ZL. Prospective evaluation of respiratory health benefits from reduced exposure to airborne particulate matter. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2017; 27:126-135. [PMID: 28245677 DOI: 10.1080/09603123.2017.1292497] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We aimed to investigate if short-term exposure to reduced particulate matter (PM) air pollution would affect respiratory function in healthy adults. We followed a cohort of 42 healthy participants from a community afflicted with severe PM air pollution to a substantially less polluted area for nine days. We measured daily airborne PM [with an aerodynamic diameter of less than 2.5 μm (PM2.5) and 10 μm (PM10)] and PM2.5 carbon component concentrations. Five repeated respiratory function measurements and fractional exhaled nitric oxide test were made for each participant. Associations between respiratory health and PM exposure were assessed using linear mixed models. Each 10 μg/m3 decrease in same-day PM2.5 was associated with small but consistent increase in the forced expiratory volume in 1 s (FEV1) (9.00 mL) and forced vital capacity (14.35 mL). Our observations indicate that respiratory health benefits can be achieved even after a short-term reduction of exposure to PM. Our results provide strong evidence for more rigorous air pollution controls for the health benefit of populations.
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Affiliation(s)
- Yanhui Hao
- a Department of Occupational and Environmental Health, School of Public Health , Fudan University , Shanghai , China
| | - Guanghui Zhang
- a Department of Occupational and Environmental Health, School of Public Health , Fudan University , Shanghai , China
| | - Bin Han
- b State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing , China
| | - Xiaowen Xu
- a Department of Occupational and Environmental Health, School of Public Health , Fudan University , Shanghai , China
| | - Nannan Feng
- a Department of Occupational and Environmental Health, School of Public Health , Fudan University , Shanghai , China
| | - Yong Li
- a Department of Occupational and Environmental Health, School of Public Health , Fudan University , Shanghai , China
| | - Wei Wang
- c Department of Epidemiology and Biostatistics , College of Public Health, University of South Florida , Tampa , FL , USA
| | - Haidong Kan
- a Department of Occupational and Environmental Health, School of Public Health , Fudan University , Shanghai , China
| | - Zhipeng Bai
- b State Key Laboratory of Environmental Criteria and Risk Assessment , Chinese Research Academy of Environmental Sciences , Beijing , China
| | - Yiliang Zhu
- c Department of Epidemiology and Biostatistics , College of Public Health, University of South Florida , Tampa , FL , USA
| | - William Au
- d Department of Environmental Toxicology , Preventive Medicine and MPH Education Center, Shantou University Medical College , Shantou , China
| | - Zhao-Lin Xia
- a Department of Occupational and Environmental Health, School of Public Health , Fudan University , Shanghai , China
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Biomarkers of endothelial activation and thrombosis in tunnel construction workers exposed to airborne contaminants. Int Arch Occup Environ Health 2017; 90:309-317. [PMID: 28124139 DOI: 10.1007/s00420-017-1199-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 01/09/2017] [Indexed: 10/20/2022]
Abstract
OBJECTIVES The aims were to study biomarkers of systemic inflammation, platelet/endothelial activation and thrombosis in tunnel construction workers (TCW). METHODS Biomarkers and blood fatty acids were measured in blood of 90 TCW and 50 referents before (baseline) and towards the end (follow-up) of a 12 days work period. They had been absent from work for 9 days at baseline. Air samples were collected by personal sampling. RESULTS Personal thoracic air samples showed geometric mean (GM) particulate matter and α-quartz concentrations of 604 and 74 µg/m3, respectively. The arithmetic mean (AM) concentration of elemental carbon was 51 µg/m3. The GM (and 95% confidence interval) concentration of the pro-inflammatory cytokine TNF-α decreased from 2.2 (2.0-2.4) at baseline to 2.0 pg/mL (1.8-2.2) (p = 0.02) at follow-up among the TCW. Also the platelet activation biomarkers P-selectin and CD40L decreased significantly [25.4 (24.1-26.6) to 24.4 (22.9-26.0)] ng/mL, p = 0.04 and 125 (114-137) to 105 (96-115) pg/mL, p < 0.001, respectively. ICAM-1 concentrations increased from 249 (238-260) to 254 (243-266) ng/mL (p = 0.02). No significant alterations were observed among the referents when assessed by paired sample t test. Unbeneficial alterations in blood fatty acid composition were observed between baseline and follow-up, mainly among referents. CONCLUSIONS TCW had slightly reduced systemic inflammation and platelet activation although highly exposed to particulate matter, α-quarz and diesel exhaust, which might be due to increased physical activity during the exposure period. The slightly increased ICAM-1 may indicate monocyte recruitment to the lungs. The diet was substantially altered towards a less beneficial fatty acid profile.
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Weggeberg H, Føreland S, Buhagen M, Hilt B, Flaten TP. Multi-element analysis of airborne particulate matter from different work tasks during subsea tunnel rehabilitation work. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2016; 13:725-740. [PMID: 27078031 DOI: 10.1080/15459624.2016.1177645] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Tunnel rehabilitation work involves exposure to various air contaminants, including airborne particulate matter (APM). Little is known on the contents of different chemical components of APM generated during tunnel work. The objective of the present study was to characterize exposure to APM and various elements for different job categories in different size fractions of APM during a subsea tunnel rehabilitation project carried out in Western Norway. Personal as well as stationary samples of inhalable, thoracic and respirable dust were collected from workers divided into 11 different job categories based on work operations performed, and air concentrations of a range of elements were determined using high-resolution inductively coupled plasma-mass spectrometry (HR-ICP-MS). Overall, APM concentrations were low, but with some measurements exceeding the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV) for inhalable particles, and considerable proportions of respirable and especially inhalable APM exceeding 10% of the TLVs. For most elements, air concentrations measured were quite low, in the ng/m(3) range, except for the major crustal elements Si, Fe, Al, and Mg, which were found to be in the µg/m(3) range. Asphalt millers overall had the highest exposure levels for APM and most measured elements; for instance, mean concentrations of V, Rb, and Mn were 380, 210, and 2000 ng/m(3) in inhalable and 33, 44, and 310 ng/m(3) in respirable APM. Mounting PVC membrane seemed to generate elevated levels of Cr, Zn, Sn, Pb, Sb, As, Mn, Fe, and Ni, whereas typical bedrock elements were elevated during drilling activities compared to the low exposed categories lead car drivers, foremen/surveyors, drivers of heavy-duty vehicles, and electricians. Overall, stationary samples contained lower amounts of dust and elemental constituents compared to personal samples. Elemental air concentrations were highly variable with occasional elevated values for APM and certain elements, particularly Cr and Zn.
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Affiliation(s)
- Hanne Weggeberg
- a Department of Chemistry , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway
| | - Solveig Føreland
- b Department of Occupational Medicine , St. Olav's Hospital, Trondheim University Hospital , Trondheim , Norway
- c Department of Geology and Mineral Resources Engineering , NTNU , Trondheim , Norway
| | - Morten Buhagen
- b Department of Occupational Medicine , St. Olav's Hospital, Trondheim University Hospital , Trondheim , Norway
- d Department of Public Health and General Practice , NTNU , Trondheim , Norway
| | - Bjørn Hilt
- b Department of Occupational Medicine , St. Olav's Hospital, Trondheim University Hospital , Trondheim , Norway
- d Department of Public Health and General Practice , NTNU , Trondheim , Norway
| | - Trond Peder Flaten
- a Department of Chemistry , Norwegian University of Science and Technology (NTNU) , Trondheim , Norway
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Jørgensen RB, Buhagen M, Føreland S. Personal exposure to ultrafine particles from PVC welding and concrete work during tunnel rehabilitation. Occup Environ Med 2016; 73:467-73. [DOI: 10.1136/oemed-2015-103411] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 03/07/2016] [Indexed: 11/03/2022]
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