Atmospheric Pollution Research最新文献_第7页

PM2.5 estimated directly from satellite data and from fused data produced by an interpretable multi-model stacking ensemble method 直接从卫星数据和可解释的多模型叠加集合方法产生的融合数据估算的 PM2.5

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-16 DOI: 10.1016/j.apr.2024.102259

Xingxing Ma , Hongnian Liu , Qian Liu , Yuanmou Wang

{"title":"PM2.5 estimated directly from satellite data and from fused data produced by an interpretable multi-model stacking ensemble method","authors":"Xingxing Ma , Hongnian Liu , Qian Liu , Yuanmou Wang","doi":"10.1016/j.apr.2024.102259","DOIUrl":"10.1016/j.apr.2024.102259","url":null,"abstract":"<div>Rapid urbanization and industrialization in China have resulted in an increase of PM2.5 concentrations. In this study, an interpretable multi-model stacking ensemble method (IMSEM) with top-of-the-atmosphere reflectance (TOAR) from the Himawari-8 satellite were used to acquire high-resolution PM2.5 data in China. In contrast to the traditional approach whereby PM2.5 is estimated with single models, using TOAR data, IMSEM outperformed single models in terms of several skill scores. The hourly average R2 (RMSE) of 10-fold-cross validation reached 0.84 (9.52 μg/m3) in 2021 by IMSEM. The feature importance results of IMSEM showed the significant contributions of TOAR and meteorological variables. The PM2.5 estimates of IMSEM were also fused with surface observations using interpolation for correction and optimization. When this was done for PM2.5 concentrations in 2022, it was found that, among the four seasons, the fusion-based estimate of PM2.5 concentration was highest in winter (49.94 μg/m3), followed by autumn (31.59 μg/m3) and spring (29.07 μg/m3), and lowest in summer (19.25 μg/m3).</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102259"},"PeriodicalIF":3.9,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1309104224002241/pdfft?md5=dfc69f2a46f4dd8140c91b5d8b26cd22&pid=1-s2.0-S1309104224002241-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141853681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on the integration of hydrogen in a multi-cylinder low heat rejection diesel engine using a ternary blend 在使用三元混合燃料的多缸低热排斥柴油发动机中整合氢气的研究

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-14 DOI: 10.1016/j.apr.2024.102250

Krishna Kumar Pandey

{"title":"Study on the integration of hydrogen in a multi-cylinder low heat rejection diesel engine using a ternary blend","authors":"Krishna Kumar Pandey","doi":"10.1016/j.apr.2024.102250","DOIUrl":"10.1016/j.apr.2024.102250","url":null,"abstract":"<div>Among alternative fuels, hydrogen (H2) holds significant promise as both a fuel and an energy carrier. It is expected to become a key alternative fuel in the near future to meet stringent pollution standards. H2 is used in internal combustion (IC) engines, gas turbines, and the aerospace industry due to its non-toxic and odorless nature, high calorific value (CV), and wide temperature range of combustibility. Additionally, it is a long-term renewable energy source that produces fewer pollutants. This study explores the impact of different H2 ratios on combustion behavior, engine performance, and emission characteristics in a dual-fuel compression ignition (CI) diesel engine. The current research focuses on the effect of TB of ethanol, Jatropha methyl ester, and diesel with the induction of H2 with different flow rates in diesel engine in dual fuel mode (DFM). The tests were performed at different engine loads, 25%, 50%, 75%, and 100% at a constant engine speed of 2500 rpm. H2 is inducted at different flow rates like 2, 4, and 6 Litres per minute (lpm). Partially stabilized zirconia (PSZ) is used to coat the cylinder head, piston crown, and valves with a thickness of 0.5 mm. The combined effect of TB fuel and H2 in a CI engine improves combustion and engine performance. At full load condition, brake thermal efficiency (BTE) is improved by 11.5% for TB fuel with H2 at 6 lpm, and exhaust gas temperature (EGT) increased by 12.7%. The cylinder pressure (CP) and heat release rate (HRR) are increased by 7.5% and 10.6% at TB fuel with 6 lpm of H2 induction. The utilization of H2 as an alternative energy source has significant consequences for the future of green energy production.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102250"},"PeriodicalIF":3.9,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141622871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pollution characteristics and oxidative potential of atmospheric particles at a typical rural area: A case study during the Chinese Lunar New Year 典型农村地区大气颗粒物的污染特征和氧化潜力：中国农历新年期间的案例研究

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-14 DOI: 10.1016/j.apr.2024.102251

Shi-Ming Jia , Chang-Yu Weng , Guo-Ying Wang , Wan-Li Ma

{"title":"Pollution characteristics and oxidative potential of atmospheric particles at a typical rural area: A case study during the Chinese Lunar New Year","authors":"Shi-Ming Jia , Chang-Yu Weng , Guo-Ying Wang , Wan-Li Ma","doi":"10.1016/j.apr.2024.102251","DOIUrl":"10.1016/j.apr.2024.102251","url":null,"abstract":"<div>The emission from solid fuel combustion for cooking and heating has a direct influence on air quality in rural areas, especially in cold season. In this study, the pollution characteristics and chemical compositions of total suspended particle (TSP) were comprehensively studied in a typical rural area during the Chinese Lunar New Year as a case study. In addition, the environmentally persistent free radicals (EPFRs) and oxidative potential (OP) in TSP were analyzed and compared before and after the festival (BF & AF) for better understanding the exposure risk of TSP. The average values of typical combustion products, such as carbonaceous components and PAHs, were at 2.5 times higher BF than those AF due to the impact of anthropogenic emission. The average EPFRs concentration BF was 2.78 ± 0.70 × 1015 spins/m3, whereas the concentration significantly decreased AF (1.07 ± 0.48 × 1015 spins/m3). The source analysis suggested that coal and biomass burning was the major source of EPFRs. The OPv values were in the range of 0.85–10.1 nmol/min/m3 with an average of 3.74 nmol/min/m3, and the peak occurred at the eve of the festival. For OPm, its mean value was up to 12.3 ± 7.8 pmol/min/μg and showed positive correlation with crustal elements (r values for Fe = 0.51 and Mn = 0.49, p < 0.05), indicating the effect of dust-input. In summary, this study provided basic information for better understanding the pollution characteristic and health risk of atmospheric particles.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102251"},"PeriodicalIF":3.9,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141696104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Warming impact of black carbon aerosols on the direct radiative forcing over a semi-arid location, Solapur in India 黑碳气溶胶对印度索拉普尔半干旱地区直接辐射强迫的升温影响

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-08 DOI: 10.1016/j.apr.2024.102249

Pawan S. Soyam , Pramod D. Safai , Yang Lian , Abhilash S. Panicker , Sanjay S. Kale , Neelam Malap , Thara Prabhakaran

{"title":"Warming impact of black carbon aerosols on the direct radiative forcing over a semi-arid location, Solapur in India","authors":"Pawan S. Soyam , Pramod D. Safai , Yang Lian , Abhilash S. Panicker , Sanjay S. Kale , Neelam Malap , Thara Prabhakaran","doi":"10.1016/j.apr.2024.102249","DOIUrl":"https://doi.org/10.1016/j.apr.2024.102249","url":null,"abstract":"<div>In this study, we investigated the aerosol radiative forcing (ARF) using ground-based measurements of PM2.5 and black carbon aerosols at a semi-arid, rain shadow location, Solapur in peninsular India. It is observed that aerosols caused a net cooling effect at top of the atmosphere (TOP) indicating that the aerosols reflect more solar radiation back to space than they absorb. At the surface, the aerosols caused a net cooling effect indicating more presence of scattering type aerosols. The resulting ARF of the aerosols was found to be ranging from +38 Wm-2 in monsoon to +53 Wm-2 in pre-monsoon indicating trapping of energy which resulted in a warming of the atmosphere. However, BC –only forcing indicated a significant warming effect at TOP as well as in the atmosphere which showed the potential of the absorbing carbonaceous aerosols. Overall, BC was responsible for 44% and 32% of the composite ARF, even though it formed only 7% and 2% of composite aerosol in the dry and wet periods, respectively. The warming impact of BC aerosols was also manifested in terms of their contribution to aerosol radiative forcing efficiency (ARFE) which was about four times more for BC-only than that for composite aerosols. More atmospheric heating rates were observed during dry periods for composite and BC-only aerosols than during wet period. These findings have important implications for aerosol-cloud-precipitation studies as well as the atmospheric thermodynamics and hydrological cycle over this semi-arid region where the total aerosol load is not significant and rainfall amount is scarce.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102249"},"PeriodicalIF":3.9,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141594647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Health risks associated with hazardous airborne chemicals in beauty salons: A pilot study in Kuwaiti salons 美容院空气中有害化学物质的健康风险：科威特美容院试点研究

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-06 DOI: 10.1016/j.apr.2024.102248

Mohamed F. Yassin , Bashayer Al-Khaldi

{"title":"Health risks associated with hazardous airborne chemicals in beauty salons: A pilot study in Kuwaiti salons","authors":"Mohamed F. Yassin , Bashayer Al-Khaldi","doi":"10.1016/j.apr.2024.102248","DOIUrl":"https://doi.org/10.1016/j.apr.2024.102248","url":null,"abstract":"<div>The beauty industry has become increasingly popular in recent years, leading to a surge in salon visits for various beauty treatments. However, public concerns were raised about the possible health dangers linked to the widespread use of harmful chemicals in beauty salons. To address these concerns, a pilot study was conducted in Kuwait to evaluate and identify the ten most commonly occurring hazardous airborne chemicals in different beauty salons. Air samples were gathered from inside and outside ten beauty salons situated in diverse regions of Kuwait, covering various periods, including working hours, non-working hours, and a continuous 24-h period. The study used diffusion tubes for sampling and employed the thermo-desorption gas chromatograph/mass spectroscopy technique (TD-GC/MS) to identify the chemical compounds. In addition, the measured concentration of compounds was utilized to assess the potential inhalation health risks associated with both carcinogenic and non-carcinogenic substances, employing the USEPA Cancer Risk Indicator (CRI) and Hazard Quotient Indicator (HQI). The findings indicated that indoor concentrations of hazardous chemicals were significantly higher than those recorded outdoors. A total of 55 hazardous chemicals were detected in the indoor air quality inside beauty salons, and benzene concentrations exceeded ACGIH thresholds, suggesting a potential health concern. Although concentrations of toluene, ethylbenzene, m/p-xylene, and o-xylene remained below NIOSH recommendations, health risk assessments indicated the potential carcinogenicity of three compounds in the indoor air of beauty salons: benzene, ethylbenzene, and 2-ethyl-1-hexanol. Additionally, 15 compounds were identified by non-carcinogenic risk assessments, such as ethyl acetate and 2-ethyl-1-hexanol. These findings emphasize the urgency of implementing measures to address the exposure in Kuwait's beauty salons and conducting further research.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102248"},"PeriodicalIF":3.9,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141594648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A deep learning model incorporating frequency domain information for ultra multi-step air pollutant forecasting: A case study of Shanghai 结合频域信息的深度学习模型用于超多步骤空气污染物预报：上海案例研究

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-05 DOI: 10.1016/j.apr.2024.102247

Hai-chao Huang , Hong-di He , Qing-yan Fu , Jun Pan , Zhong-ren Peng

{"title":"A deep learning model incorporating frequency domain information for ultra multi-step air pollutant forecasting: A case study of Shanghai","authors":"Hai-chao Huang , Hong-di He , Qing-yan Fu , Jun Pan , Zhong-ren Peng","doi":"10.1016/j.apr.2024.102247","DOIUrl":"https://doi.org/10.1016/j.apr.2024.102247","url":null,"abstract":"<div>Multi-step forecasting of air pollutants extends the horizon for individuals and authorities to take informed actions for mitigating potential risks. Due to the instability of air pollutants, current research primarily focuses on relatively short-term forecasting, with achieving ultra multi-step forecasting presenting a significant challenge. In response to this issue, this study proposes a novel model: Frequency Enhanced Decomposed Temporal Convolution Networks (Fed-TCN) to achieve ultra multi-step forecasting. This study applies time-frequency transformation to explore the frequency characteristics of air pollutants and extract long-term patterns. These patterns are then fed into TCN to enhance the accuracy of ultra multi-step forecasting. Extensive experiments were conducted on eight air pollutants at four monitoring stations in Shanghai. The results indicate variations in forecastable ranges for different pollutants. NO and NOx can be forecasted up to one week, while NO2, CO, SO2, and O3 require forecasting within 1–3 days (approximately 24–72 steps ahead). Furthermore, PM2.5 and PM10 can only be forecasted for short-term periods, not exceeding 12 h. When compared to baseline models, Fed-TCN achieves a 4.3%–11% lower Mean Absolute Error. Moreover, Fed-TCN provides insights into the contribution of pollutant composition patterns to forecasting accuracy. In general, daily patterns, semi-commuting patterns, and residuals contribute 68.8%–81.7% to ultra multi-step forecasting. The proposed method is applicable for ultra multi-step forecasts of other regions and different types of air pollutants.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102247"},"PeriodicalIF":3.9,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identification of respiratory virus in indoor air of hospitals: A comparison of adult and children's hospital 医院室内空气中呼吸道病毒的鉴定：成人医院与儿童医院的比较

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-04 DOI: 10.1016/j.apr.2024.102245

Gholamreza Goudarzi , Yaser Tahmasebi Birgani , Niloofar Neisi , Ali Akbar Babaei , Mehdi Ahmadi , Zeynab Baboli

{"title":"Identification of respiratory virus in indoor air of hospitals: A comparison of adult and children's hospital","authors":"Gholamreza Goudarzi , Yaser Tahmasebi Birgani , Niloofar Neisi , Ali Akbar Babaei , Mehdi Ahmadi , Zeynab Baboli","doi":"10.1016/j.apr.2024.102245","DOIUrl":"https://doi.org/10.1016/j.apr.2024.102245","url":null,"abstract":"<div>Air sampling was done inside adult and children's hospitals that were selected to treat severe cases of COVID-19. Influence of peripheral factors such as particle concentration, air velocity, sampling point dimensions, distance from the patient bed, sampling time, the flow rate of sampling pump, and factors related to COVID-19 patients (disease period, mask use, number, and age) were analyzed using multivariate analysis (RT-PCR). The results showed that 5.8% (N = 8) of indoor air samples were positive for the presence of the coronavirus. The presence of viruses in the indoor air of hospitals has a strong positive relationship with particles and the age of patients while it has a reverse relationship with the air cleaner, ventilation system, and distance from the patients. Therefore, the higher particle concentration, the age of hospitalized patients, and the remarkable number of patients increase the probability of the presence and identification of the coronavirus in the indoor air of hospital wards. Also, the presence of an air cleaner, a suitable ventilation system especially a mechanical one, and increasing the distance from the patients reduces the possibility of virus existence in the indoor air and its identification. In general, the results showed that the adult hospital has more polluted indoor air than the children's hospital in terms of the presence of SARS-COV-2. Sanitation and engineering measures like upgrading the ventilation system, particularly in vulnerable wards of hospitals are recommended.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102245"},"PeriodicalIF":3.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141605489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics, sources, and health risks of PAHs and their derivatives in indoor dust in Zhengzhou 郑州市室内尘埃中多环芳烃及其衍生物的特征、来源和健康风险

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-04 DOI: 10.1016/j.apr.2024.102246

Junmei Zhang , Zhiyu Wang , Yuhang Wei , Shushen Yang , Sen Yao , Benyong Yang , Lingxiao Yang

{"title":"Characteristics, sources, and health risks of PAHs and their derivatives in indoor dust in Zhengzhou","authors":"Junmei Zhang , Zhiyu Wang , Yuhang Wei , Shushen Yang , Sen Yao , Benyong Yang , Lingxiao Yang","doi":"10.1016/j.apr.2024.102246","DOIUrl":"https://doi.org/10.1016/j.apr.2024.102246","url":null,"abstract":"<div>The occurrence, source, and health risk of polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs (NPAHs), and oxy-PAHs (OPAHs) in indoor dust collected from three types of microenvironments (offices, classrooms, and dormitories) at a university campus in Zhengzhou were analysed. The results showed that the average concentration of the total PAHs was 2403.21 ± 981.99 ng g−1, with PHE (20.06% of Σ18PAHs) and BkF (15.46%) being the dominant species. The average concentrations of total NPAHs and OPAHs were 11.09 ± 5.12 and 385.80 ± 255.27 ng g−1, with 2+3N-FLT (39.15%) and 9-FLO (39.76%) as the most abundant species of NPAHs and OPAHs, respectively. The average concentrations of total PAHs, NPAHs, and OPAHs in different microenvironments displayed obvious spatial specificity with the highest values in dormitories. The main source of PAHs, as identified by diagnostic ratios, was petroleum combustion, coal/biomass combustion and vehicle exhaust emissions. The average incremental lifetime cancer risk (ILCR) for undergraduates exposed to dust in classrooms and dormitories exceeded 10−6, indicating a potential cancer risk. The most important exposure pathway was dermal contact, while the inhalation route was negligible.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102246"},"PeriodicalIF":3.9,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interannual and spatial variations in acid-soluble trace elements in snow: comparison with the mineralogy of dusts from open pit bitumen mining 雪中酸溶性痕量元素的年际和空间变化：与露天沥青开采尘埃矿物学的比较

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-03 DOI: 10.1016/j.apr.2024.102244

Fiorella Barraza, Andreas Hamann, Tommy Noernberg, Judy Schultz, William Shotyk

{"title":"Interannual and spatial variations in acid-soluble trace elements in snow: comparison with the mineralogy of dusts from open pit bitumen mining","authors":"Fiorella Barraza, Andreas Hamann, Tommy Noernberg, Judy Schultz, William Shotyk","doi":"10.1016/j.apr.2024.102244","DOIUrl":"https://doi.org/10.1016/j.apr.2024.102244","url":null,"abstract":"<div>There is ongoing concern about trace element (TE) emissions to the global environment from the dusts generated by open pit mining of coal, iron ore, stone quarries, and aggregate extraction. However, the chemical composition and acid solubility of these dusts is highly variable. Here, TEs were determined in snow collected in 2016 and 2017 in the vicinity of open-pit bitumen mines in northern Alberta, Canada. Acid solubility was assessed quantitatively by comparing TE concentrations in leachates and acid digests. The mineralogical composition of the particles extracted from the snow was examined using SEM-EDS. The data is reproducible from one year to the next. TE concentrations were greater throughout the industrial zone compared to the reference location (UTK), with the midpoint between the two central upgraders being especially impacted. Regardless of their geochemical class (lithophile: Al, Be, Cs, La, Li, Sr, Th; chalcophile: As, Cd, Pb, Sb, Tl; or enriched in bitumen: Mo, Ni, V), all TEs showed strong, positive correlations with Y, a conservative element which serves as a surrogate for the abundance of mineral particles. The ratio V:Ni in the snow is less than the corresponding values for bitumen and petcoke, but similar to that of local road dust. The ratio La:Al in snow is elevated, relative to the earth's crust, suggesting an enrichment of heavy minerals monazite and zircon. The predominance of quartz and other stable silicates helps to explain the limited chemical solubility of the dusts, and predicts a low bioaccessibility of these TEs in the environment.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102244"},"PeriodicalIF":3.9,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1309104224002095/pdfft?md5=f3e1733a9c7c5ea5526b2815cd20e20e&pid=1-s2.0-S1309104224002095-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Depositions of airborne microplastics during the wet and dry seasons in Pathum Thani, Thailand 泰国巴吞他尼雨季和旱季空气中微塑料的沉积情况

IF 3.9 3区环境科学与生态学

Atmospheric Pollution Research Pub Date : 2024-07-02 DOI: 10.1016/j.apr.2024.102242

Ekbordin Winijkul , Kyaw Zin Latt , Kanokwan Limsiriwong , Tatchai Pussayanavin , Trakarn Prapaspongsa

{"title":"Depositions of airborne microplastics during the wet and dry seasons in Pathum Thani, Thailand","authors":"Ekbordin Winijkul , Kyaw Zin Latt , Kanokwan Limsiriwong , Tatchai Pussayanavin , Trakarn Prapaspongsa","doi":"10.1016/j.apr.2024.102242","DOIUrl":"https://doi.org/10.1016/j.apr.2024.102242","url":null,"abstract":"<div>In this study, microplastics were monitored separately in the wet and dry deposition in the peri-urban area of Thailand. Over eighteen weeks from September 2021 to January 2022, rainwater (wet deposition) and settled microplastics (dry deposition) were systematically collected. Subsequent analyses involved the extraction, quantification, and identification of microplastics through wet peroxide oxidation, density separation, stereomicroscopic visual inspection and Fourier-transform infrared (FTIR) analysis. The results show that the wet deposition flux of microplastics was averaged at 285 numbers/m2/day while the dry deposition flux of microplastics was averaged at 199 numbers/m2/day, contributing to a total deposition flux (dry + wet) of 325 numbers/m2/day. Comparative assessments with prior studies from different locations demonstrated similarities in microplastic numbers, color and polymer types. Notably, this study found a higher microplastic deposition flux during the period when wet deposition existed than the flux during the period with only dry deposition, underscoring the important role of rainfall in adding more removal of microplastics from the atmosphere. These findings provide crucial insights into the dynamics of microplastic deposition in outdoor settings, significantly contributing to understanding the microplastic pollution cycle in the environment.</div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102242"},"PeriodicalIF":3.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0