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Chen H, Liu N, Guo J, Wang L, Zhang Y, Wei J, Xu Y, Cao Y, Zhang Y. Two-parameter C-history method: A fast and accurate method for determining the characteristic parameters of formaldehyde/VOC early-stage emissions from building materials. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174218. [PMID: 38914326 DOI: 10.1016/j.scitotenv.2024.174218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 06/19/2024] [Accepted: 06/21/2024] [Indexed: 06/26/2024]
Abstract
With the worsening indoor air quality in developing countries, more and more attention is being paid to indoor air pollution, especially formaldehyde and volatile organic compounds (VOCs) emitted from indoor building materials. A series of methods, such as the C-history method, have been proposed to determine the mechanistic parameters of formaldehyde and other VOC emissions. However, these methods require a relatively long test duration (at least 3 days) and may yield a multi-solution problem for these parameters. Therefore, we have developed a novel method, the two-parameter C-history method, to overcome these limitations by measuring the two early-stage emission characteristic parameters for formaldehyde/VOCs. The experimental results validate the accuracy of this method for different building materials and showed that the test duration can be substantially shortened to within 12 h. Based on this, we propose a new method to quickly predict the two emission characteristic parameters at different temperatures. We optimize the experimental parameters and discuss their influence to further improve accuracy. This method will be useful in engineering applications.
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Affiliation(s)
- Haipeng Chen
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China
| | - Ningrui Liu
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China; Department of Environmental & Occupational Health Sciences, University of Washington, Washington 98105, United States
| | - Jian Guo
- China Construction Shenzhen Decoration Co., Ltd, China
| | - Luyang Wang
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China
| | - Yao Zhang
- China Construction Shenzhen Decoration Co., Ltd, China
| | - Jingya Wei
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China
| | - Ying Xu
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China
| | - Yajun Cao
- China Construction Shenzhen Decoration Co., Ltd, China.
| | - Yinping Zhang
- Department of Building Science, Tsinghua University, Beijing 100084, China; Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China.
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Chen M, Strodl E, Yang W, Yin X, Wen G, Sun D, Xian D, Zhao Y, Chen W. Independent and Joint Effects of Prenatal Incense-Burning Smoke Exposure and Children's Early Outdoor Activity on Preschoolers' Obesity. TOXICS 2024; 12:329. [PMID: 38787109 PMCID: PMC11126066 DOI: 10.3390/toxics12050329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/18/2024] [Accepted: 04/29/2024] [Indexed: 05/25/2024]
Abstract
Incense burning is a significant source of indoor air pollution in many Asian regions. There is emerging evidence that maternal prenatal exposure to incense-burning smoke may be a risk factor for childhood obesity. We aimed to extend this new line of research by investigating the independent and joint effect of incense-burning smoke exposure, and children's outdoor activity in early life, on preschoolers' obesity. A total of 69,637 mother-child dyads were recruited from all kindergartens in the Longhua District of Shenzhen, China. Information on sociodemographic characteristics, maternal exposure to incense-burning smoke (IBS) during pregnancy, and frequency and duration of outdoor activity at the age of 1-3 years was collected by a self-administered questionnaire. In addition, the heights and weights of the children were measured by the research team. Logistic regression models and cross-over analyses were conducted to investigate the independent and combined effects of maternal exposure to incense-burning smoke during pregnancy and children's early outdoor activity on obesity in preschoolers. We found that prenatal exposure to incense-burning smoke increased the risk of the presence of obesity in preschoolers' (AOR = 1.13, 95% CI = 1.03-1.23). Additionally, lower frequencies (<3 times/week) or shorter durations (<60 min/time) of outdoor activity from the age of 1-3 years were significantly associated with the presence of obesity, with AORs of 1.24 (95% CI =1.18-1.32) and 1.11 (95% CI = 1.05-1.17), respectively. Furthermore, the cross-over analysis showed that prenatal exposure to IBS combined with a lower frequency of early outdoor activity (AOR = 1.47, 95% CI = 1.31-1.66) or a shorter duration of outdoor activity during ages of 1-3 years (AOR = 1.22, 95% CI = 1.07-1.39) increased the risk of obesity in preschoolers. Finally, additive interactions between prenatal exposure to IBS and postnatal outdoor activity on obesity were identified. Our study indicates that maternal exposure to incense-burning smoke during pregnancy and early lower postanal outdoor activity may independently and jointly increase the risk of obesity among preschoolers.
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Affiliation(s)
- Meimei Chen
- Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China;
| | - Esben Strodl
- School of Psychology and Counselling, Queensland University of Technology, Brisbane, QLD 4059, Australia;
| | - Weikang Yang
- Women’s and Children’s Hospital of Longhua District of Shenzhen, Shenzhen 518110, China
| | - Xiaona Yin
- Women’s and Children’s Hospital of Longhua District of Shenzhen, Shenzhen 518110, China
| | - Guomin Wen
- Women’s and Children’s Hospital of Longhua District of Shenzhen, Shenzhen 518110, China
| | - Dengli Sun
- Women’s and Children’s Hospital of Longhua District of Shenzhen, Shenzhen 518110, China
| | - Danxia Xian
- Women’s and Children’s Hospital of Longhua District of Shenzhen, Shenzhen 518110, China
| | - Yafen Zhao
- Women’s and Children’s Hospital of Longhua District of Shenzhen, Shenzhen 518110, China
| | - Weiqing Chen
- Department of Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou 510080, China;
- School of Health Management, Xinhua College of Guangzhou, Guangzhou 510080, China
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Yu L, He X, Gao C, Li G, Wang Y, Wang Y. An emission model for inhalable chemicals from children's play mats based on partition coefficients. J Chromatogr A 2024; 1721:464855. [PMID: 38569298 DOI: 10.1016/j.chroma.2024.464855] [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: 01/04/2024] [Revised: 03/26/2024] [Accepted: 03/29/2024] [Indexed: 04/05/2024]
Abstract
Inhalable chemicals found in children's play mats can be slowly released into indoor environments and consequently threaten human health. In this study, the partition coefficients of seven inhalable chemicals between play mats and air were calculated by headspace gas chromatography-mass spectrometry based on the law of conservation of mass and the principle of equilibrium of headspace bottles. Furthermore, an emission source model for the residual ratio of the inhalable chemicals in play mats was established. Most substances found in play mats have large partition coefficients owing to the complex void structure of the mats, which adsorbs a large number of organic pollutants. The partition coefficient is not only related to the boiling point and environmental temperature, but also the specific material and the adsorption of the organic pollutant onto the material. The emission source model for children's play mats developed in this study can characterize the decay of the inhalable chemicals over time. The data showed that after eight days of placing the play mat in a ventilated environment, the residual ratio of seven inhalable chemicals did not exceed 15 %.
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Affiliation(s)
- Lihua Yu
- Shandong Institute for Product Quality Inspection, Jinan 250102, China
| | - Xiangke He
- Shandong Institute for Product Quality Inspection, Jinan 250102, China
| | - Cuiling Gao
- Shandong Institute for Product Quality Inspection, Jinan 250102, China.
| | - Guixiao Li
- Shandong Institute for Product Quality Inspection, Jinan 250102, China
| | - Yue Wang
- Shandong Institute for Product Quality Inspection, Jinan 250102, China
| | - Yunbo Wang
- Shandong Jianzhu University, Jinan, 250101, China
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Cao F, Liu ZR, Ni QY, Zha CK, Zhang SJ, Lu JM, Xu YY, Tao LM, Jiang ZX, Pan HF. Emerging roles of air pollution and meteorological factors in autoimmune eye diseases. ENVIRONMENTAL RESEARCH 2023; 231:116116. [PMID: 37182831 DOI: 10.1016/j.envres.2023.116116] [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: 03/25/2023] [Revised: 05/02/2023] [Accepted: 05/11/2023] [Indexed: 05/16/2023]
Abstract
Autoimmune eye diseases (AEDs), a collection of autoimmune inflammatory ocular conditions resulting from the dysregulation of immune system at the ocular level, can target both intraocular and periorbital structures leading to severe visual deficit and blindness globally. The roles of air pollution and meteorological factors in the initiation and progression of AEDs have been increasingly attractive, among which the systemic and local mechanisms are both involved in. Exposure to excessive air pollution and extreme meteorological conditions including PM2.5/PM0.1, environmental tobacco smoke, insufficient sunshine, and high temperature, etc., can disturb Th17/Treg balance, regulate macrophage polarization, activate neutrophils, induce systemic inflammation and oxidative stress, decrease retinal blood flow, promote tissue fibrosis, activate sympathetic nervous system, adversely affect nutrients synthetization, as well as induce heat stress, therefore may together deteriorate AEDs. The crosstalk among inflammation, oxidative stress and dysregulated immune system appeared to be prominent. In the present review, we will concern and summarize the potential mechanisms underlying linkages of air pollution and meteorological factors to ocular autoimmune and inflammatory responses. Moreover, we concentrate on the specific roles of air pollutants and meteorological factors in several major AEDs including uveitis, Graves' ophthalmopathy (GO), ocular allergic disease (OAD), glaucoma, diabetic retinopathy (DR), etc.
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Affiliation(s)
- Fan Cao
- Department of Ophthalmology, The Second Affiliated Hospital of Anhui Medical University, 678 Furong Road, Hefei, Anhui, China; Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
| | - Zhuo-Ran Liu
- Department of Ophthalmology, Ningbo Hospital, Renji Hospital, Shanghai Jiao Tong University School of Medicine, 1155 Binhaier Road, Ningbo, Zhejiang, China
| | - Qin-Yu Ni
- Department of Ophthalmology, The Second Affiliated Hospital of Anhui Medical University, 678 Furong Road, Hefei, Anhui, China; Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
| | - Chen-Kai Zha
- Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
| | - Shu-Jie Zhang
- Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
| | - Jia-Min Lu
- Department of Clinical Medicine, The Second School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
| | - Yue-Yang Xu
- Department of Clinical Medicine, The First School of Clinical Medicine, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China
| | - Li-Ming Tao
- Department of Ophthalmology, The Second Affiliated Hospital of Anhui Medical University, 678 Furong Road, Hefei, Anhui, China.
| | - Zheng-Xuan Jiang
- Department of Ophthalmology, The Second Affiliated Hospital of Anhui Medical University, 678 Furong Road, Hefei, Anhui, China.
| | - Hai-Feng Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, Anhui, China.
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