Aerosol and Air Quality Research最新文献_第7页

Characterisation of the Aerodynamic Aerosol Classifier Transfer Function for Particle Sizes up to 5 Micrometres 表征的空气动力学气溶胶分类传递函数的颗粒尺寸高达5微米

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.230008

Simon D. Payne, T. Johnson, J. Symonds

{"title":"Characterisation of the Aerodynamic Aerosol Classifier Transfer Function for Particle Sizes up to 5 Micrometres","authors":"Simon D. Payne, T. Johnson, J. Symonds","doi":"10.4209/aaqr.230008","DOIUrl":"https://doi.org/10.4209/aaqr.230008","url":null,"abstract":"The Aerodynamic Aerosol Classifier (AAC) classifies particles with the desired aerodynamic diameter by generating opposing centrifugal and drag forces on the particles using rotating concentric cylinders and a clean sheath flow. Particle transmission through the classifier is described by its transfer function, which is an important indicator of classifier performance. Characterisation of the classifier’s transfer function improves the accuracy of its common aerosol applications, such as measuring particle size distributions or providing classified particles to other aerosol instruments for calibration or further analysis. This characterisation is commonly achieved experimentally using a tandem set-up of the same classifier. While this approach was previously used to characterise the AAC’s transfer function for particle aerodynamic diameters up to 2.4 µ m using a nebuliser and a Condensation Particle Counter (CPC), the current study expands the AAC’s characterisation up to 5 µ m using a condensation aerosol generator and an Optical Particle Counter (OPC). This upper size range is significantly higher than that offered by other common aerosol classifiers, such as the approximate 1 µ m upper limit typical of the Differential Mobility Analyser (DMA), and it is well suited to many applications, including OPC calibration, bio-aerosols, drug delivery and inhalation studies, and atmospheric dust analysis. This study found that the AAC maintains its high transmission efficiency ( ≥ 60%) for particles up to 5 µ m and that its transfer function width factor increases (i.e., the distribution becomes narrower) as the aerodynamic diameter increases. Setpoint agreement between two different production AACs remained within 2% over the size range tested. Therefore, the AAC has excellent performance for classifying particles up to 5 µ m.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70296459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Validation of In-field Calibration for Low-Cost Sensors Measuring Ambient Particulate Matter in Kolkata, India 印度加尔各答低成本传感器测量环境颗粒物的现场校准验证

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.230010

Siddharth Nobell, A. Majumdar, Shovon Mukherjee, Sukumar Chakraborty, Sanjoy Chatterjee, Soumitra Bose, Anindita Dutta, Sandhya Sethuraman, D. Westervelt, Shairik Sengupta, Rakhi Basu, V. McNeill

{"title":"Validation of In-field Calibration for Low-Cost Sensors Measuring Ambient Particulate Matter in Kolkata, India","authors":"Siddharth Nobell, A. Majumdar, Shovon Mukherjee, Sukumar Chakraborty, Sanjoy Chatterjee, Soumitra Bose, Anindita Dutta, Sandhya Sethuraman, D. Westervelt, Shairik Sengupta, Rakhi Basu, V. McNeill","doi":"10.4209/aaqr.230010","DOIUrl":"https://doi.org/10.4209/aaqr.230010","url":null,"abstract":"Low-cost sensors (LCS) provide opportunities for neighborhood-level air pollution data collection, yet significant knowledge gaps remain regarding the accurate application and interpretation of LCS. In this study, we present an in-field calibration of a network of 20 low-cost ambient particulate matter sensors (LCS) in greater Kolkata, India, operating between October 2018–April 2019. In order to understand LCS performance in relation to local reference-grade PM 2.5 monitors (RGMs), three of these LCS were co-located with RGMs operated by the West Bengal Pollution Control Board at Rabindra Bharati University (RBU), Victoria Memorial (VICTORIA), and Padmapukur (Howrah, PDM). Data from the co-locations were used to calibrate the LCS network using random forest regression and multiple linear regression approaches. Measured relative humidity and temperature were significant model features. Agreement between the LCS and RGM for 24-h averaged PM 2.5 measurements was strongest at RBU, with an uncalibrated root mean squared error (RMSE) of 27.1 µ g m –3 , followed by PDM (32.6 µ g m –3 ) and VICTORIA (50.7 µ g m –3 ). Multiple linear regression was used to derive calibration models. Cross-calibration between co-located LCS-RGM pairs was tested. The LCS data after cross-calibration correctly identified days as being in or out of attainment with the 24h National Ambient Air Quality Standard of 60 µ g m –3 91% of the time. The corrected data accurately identifies days with an India scale Air Quality Index of “poor” or worse 94% of the time. This suggests that LCS can be a useful supplement to RGM networks for air quality management. Diurnal trends and a high level of correlation across the hybrid LCS-RGM network suggest regional and secondary sources of PM 2.5 are important in Kolkata.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70296519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Spatiotemporal Variations in Chemical Composition of Wet Atmospheric Deposition in Mexico City 墨西哥城湿大气沉积化学成分的时空变化

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.230023

E. Vega, A. Wellens, A. L. Alarcón, R. Sosa, M. Solano, M. Jaimes-Palomera

{"title":"Spatiotemporal Variations in Chemical Composition of Wet Atmospheric Deposition in Mexico City","authors":"E. Vega, A. Wellens, A. L. Alarcón, R. Sosa, M. Solano, M. Jaimes-Palomera","doi":"10.4209/aaqr.230023","DOIUrl":"https://doi.org/10.4209/aaqr.230023","url":null,"abstract":"A comprehensive analysis of the chemical composition of wet atmospheric deposition was performed on 7048 samples collected between 2003 and 2021 over Mexico City. The descending ion abundance trend was NH 4+ > SO 42– > NO 3– > Ca 2+ > Cl – > H + > Mg 2+ > Na + > K + , probably associated with industrial activity, heavy traffic and agricultural activities. Although main precursors have decreased importantly, ion composition did not show a clear trend throughout the years. Maximum concentrations of major ions were found in the northern and central part of the megacity, due to the impact of the Tula industrial corridor located north of the city. Weekly pH values varied from 3.6 to 9.4, being 27.1% of the values acidic. Fractional acidity showed that in sites located at higher altitudes, maximum 84.5% of the acidity was neutralized, whereas at northern stations at lower altitudes neutralization was observed up to 98%, due to the presence of alkaline species coming from the cement industry. Average ratios of (NH 4+ + Ca 2+ )/(NO 3– + SO 42– ) were > 1, suggesting neutralization of SO 42– and NO 3– by NH 4+ and Ca 2+ . Average NO 3– /SO 42– ratios suggested that the acidity was mainly influenced by sulfates coming from H 2 SO 4 . Wet deposition ranged from 4–9.9 kg ha –1 year –1 and from 8.2– 17.6 kg ha –1 year –1 for sulfur and nitrogen, respectively, among the geographical areas. The results of this study highlight the sensitivity of wet deposition chemistry to geographical, elevation and source considerations.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70296714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Risk of Stroke Associated with Temperature and PM2.5: Taiwan Stroke Registry-based Study 温度与PM2.5对中风风险的影响:台湾卒中登记研究

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.230131

F. Sung, Hei-Tung Yip, Cheng-Li Lin, J. Jeng, Jiunn‐Tay Lee, Yu Sun, Cheng-Yu Wei, Po-Yen Yeh, Kuang-Hsi Chang, Shang-Yu Chien, K. Hsu, Tsr team

{"title":"Risk of Stroke Associated with Temperature and PM2.5: Taiwan Stroke Registry-based Study","authors":"F. Sung, Hei-Tung Yip, Cheng-Li Lin, J. Jeng, Jiunn‐Tay Lee, Yu Sun, Cheng-Yu Wei, Po-Yen Yeh, Kuang-Hsi Chang, Shang-Yu Chien, K. Hsu, Tsr team","doi":"10.4209/aaqr.230131","DOIUrl":"https://doi.org/10.4209/aaqr.230131","url":null,"abstract":"This study aimed to assess seasonal stroke risks related to temperature and PM 2.5 in Taiwan. Using data of the Taiwan Stroke Registry and air pollution monitored in 2006–2017, the researchers estimated daily average ischemic and hemorrhagic strokes according to temperature and PM 2.5 levels, evaluating stroke risks by categorizing PM 2.5 levels in each temperature zone. The results revealed a higher incidence of ischemic strokes in February and a higher incidence of hemorrhagic strokes in January, both decreased to the lowest in July. The study found that incident strokes increased with the PM 2.5 level in each temperature zone except for the 30+ ° C stratum. The highest incidence of ischemic strokes appeared at PM 2.5 greater than 37.0 µ g m –3 during 20–24 ° C, whereas the highest incidence of hemorrhagic strokes appeared at PM 2.5 greater than 37.0 µ g m –3 at less than 15 ° C. No adjusted RRs of strokes were significantly associated with PM 2.5 in all temperature zones after controlling for sex, age, BMI, smoking and drinking. We conclude that stroke incidence decreases as the weather gets warmer, whereas PM 2.5 pollution may have little effect on stroke incidence. It is essential to keep warm during cold days.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70297746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Experimental and Computational Analysis of Surgical Mask Effectiveness Against COVID-19 in Indoor Environment 医用口罩室内抗新冠肺炎效果的实验与计算分析

4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.230123

C.Y. Suen, Helen H.L. Kwok, Y.H. Tsui, K.H. Lui, H.H. Leung, K.W. Lam, K.P.S. Hung, Joseph K.C. Kwan, K.F. Ho

{"title":"Experimental and Computational Analysis of Surgical Mask Effectiveness Against COVID-19 in Indoor Environment","authors":"C.Y. Suen, Helen H.L. Kwok, Y.H. Tsui, K.H. Lui, H.H. Leung, K.W. Lam, K.P.S. Hung, Joseph K.C. Kwan, K.F. Ho","doi":"10.4209/aaqr.230123","DOIUrl":"https://doi.org/10.4209/aaqr.230123","url":null,"abstract":"An experiment coupled with a computational analysis was conducted to investigate the effectiveness of surgical masks, which include KF94 and ASTM Level 1, in an indoor environment. The KF94 mask sample shows the highest filtration efficiency (99.9%) in the analysis. The simulation is consistent with the experimental results as the concentration of sodium chloride (NaCl) droplets is < 4% on average in the room. The ultraviolet-C (UVC) irradiation and dry heating samples are shown to retain the highest filtration efficiencies (> 97%) after 3 disinfection treatment cycles. All methods (boiling, steaming, ethanol treatment, and dry heating) effectively reduce the S. aureus load by 99.99%. The UVC irradiation shows exposure to 450 µW cm-2 for 10 minutes can effectively eliminate all S. aureus on the mask materials. Simulation shows the reduction in overall NaCl and carbon dioxide (CO2) levels is directly proportional to the filtration efficiency and the effectiveness of reused masks is also directly proportional to the filtration efficiency. The proxy indicator (CO2) for aerosol particles demonstrates that very fine respiratory droplets can penetrate the mask after reaching a steady state. The CO2 concentration increase shows that aerosol particles are accumulated under adequate ventilation and further pose the risk of infection. The NaCl droplets (2%) simulation shows that respiratory droplets have infiltrated the mask, but the mask demonstrates a higher ability to block the NaCl droplets and prevent their penetration. The findings suggest a need to revise the existing regulation of the control policy.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136217597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Machine-Learning-Based Classification Method for Meteorological Conditions of Ozone Pollution 基于机器学习的臭氧污染气象条件分类方法

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.220239

Yang Cao, Xiaoli Zhao, Debin Su, Xiang Cheng, Hong Ren

引用次数: 2

Changes in Tropospheric Nitrogen Dioxide Vertical Column Densities over Japan and Korea during the COVID-19 Using Pandora and MAX-DOAS 基于Pandora和MAX-DOAS的COVID-19期间日本和韩国对流层二氧化氮垂直柱密度变化

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.220145

Yongjoo Choi, Y. Kanaya, H. Takashima, Kihong Park, Haebum Lee, J. Chong, Jae Hwan Kim, Jin-Soo Park

{"title":"Changes in Tropospheric Nitrogen Dioxide Vertical Column Densities over Japan and Korea during the COVID-19 Using Pandora and MAX-DOAS","authors":"Yongjoo Choi, Y. Kanaya, H. Takashima, Kihong Park, Haebum Lee, J. Chong, Jae Hwan Kim, Jin-Soo Park","doi":"10.4209/aaqr.220145","DOIUrl":"https://doi.org/10.4209/aaqr.220145","url":null,"abstract":"We investigated the impact of human activity during COVID-19 on the tropospheric nitrogen dioxide vertical column density (NO2 TropVCD) at three urban sites (Gwangju and Busan in Korea and Yokosuka in Japan) and one remote site (Cape Hedo in Japan) from Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) and Pandora. Compared to the monthly mean NO2 TropVCD from 2015 to 2018 and in 2019, the values were lower in 2020 due to social distancing in Korea and Japan. High negative relative changes were observed from May to September (-30% to -18%) at the three urban sites;Cape Hedo, a remote site, did not show a significant difference in relative changes between previous years and 2020, suggesting that only anthropogenic emission sources decreased dramatically. In the case of Yokosuka, the 15-day moving average of the NO2 TropVCD exhibited a good relationship with transportation (R = 0.48) and industry (R = 0.54) mobility data. In contrast, the NO2 TropVCD at the Korean sites showed a moderate to low correlation with the industrial sector and insignificant correlations with transportation. The differences in correlations might be caused by the different social distancing policies in Korea (voluntary) and Japan (mandatory). By applying generalized boosted models to exclude meteorological and seasonal effects associated with NO2 TropVCD variations, we revealed that the decreasing trend from 2019 to 2020 was much steeper than that from 2015 to 2020 (a factor of two), and a significant change was identified in January 2020, when the first cases of COVID-19 were observed in both Korea and Japan. This result confirmed that the reduction in NO2 can be largely explained by the NOx emission reduction resulting from social distancing for COVID-19 rather than annual meteorological differences;however, in December 2020, NO2 recovered suddenly to its previous level due to an increase in human activities.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70292615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

A Simple Method for Generating Narrowly-dispersed Bioaerosols in Various Sizes 一种生成不同尺寸窄分散生物气溶胶的简单方法

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.220218

Young-Su Jeong, H. Seo, Sangil Han, Young-jin Koh, Kibong Choi

{"title":"A Simple Method for Generating Narrowly-dispersed Bioaerosols in Various Sizes","authors":"Young-Su Jeong, H. Seo, Sangil Han, Young-jin Koh, Kibong Choi","doi":"10.4209/aaqr.220218","DOIUrl":"https://doi.org/10.4209/aaqr.220218","url":null,"abstract":"Biological warfare agents (BWAs) cause disease in humans, animals, and plants when purposefully dispersed in an area. To minimize contamination and personnel exposure and initiate early treatment, effective BWA detection or monitoring techniques are needed. Currently, bioaerosol detection or monitoring techniques are used for detecting BWA; however, these techniques have limitations, such as limited sensitivity. To improve the detection performance and develop novel techniques, an additional step in sample preparation, such as obtaining particles of various sizes, is needed. In this study, we investigated the simple and effective generation of bioaerosol particles using a custom-made inkjet aerosol generator (IJAG). Unlike previous inkjet aerosol generators, the operation conditions of the IJAG are fixed at a nozzle heating temperature of 140 ° C, a driver voltage of 150 V, a pulse width of 60 µ s, and a frequency of 250 Hz. The only controlled factor was the concentration of bioaerosol models, including Bacillus globigii spores, ovalbumin, and polystyrene sphere latex. Our system generated bioaerosols with a diameter of 1–8 µ m and a narrow distribution size. These results suggest that our IJAG system can achieve the simple and versatile generation of narrow-dispersed bioaerosols for a wide range of available materials. Our study can help improve the sensitivity of detection and monitoring systems for BWAs and bioaerosols.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70293621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Changes of Air Pollutants in Urban Cities during the COVID-19 Lockdown-Sri Lanka 2019冠状病毒病封锁期间城市空气污染物的变化

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.220223

B. Pushpawela, S. Shelton, G. Liyanage, Sanduni Jayasekara, Dimuthu Rajapaksha, Akila Jayasundara, Lesty Das Jayasuriya

{"title":"Changes of Air Pollutants in Urban Cities during the COVID-19 Lockdown-Sri Lanka","authors":"B. Pushpawela, S. Shelton, G. Liyanage, Sanduni Jayasekara, Dimuthu Rajapaksha, Akila Jayasundara, Lesty Das Jayasuriya","doi":"10.4209/aaqr.220223","DOIUrl":"https://doi.org/10.4209/aaqr.220223","url":null,"abstract":"In response to the COVID-19 pandemic in early 2020, Sri Lanka underwent a nationwide lockdown that limited motor vehicle movement, industrial operations, and human activities. This study analyzes the impact of COVID-19 lockdown on carbon monoxide (CO), ozone (O 3 ), nitrogen dioxide (NO 2 ), sulfur dioxide (SO 2 ), and particulate matter (PM 10 , PM 2.5 ) concentrations in two urban cities (Colombo and Kandy) in Sri Lanka, by comparison of data from the lockdown period (March to May 2020) with its analogous period of 2019 and 2021. The results showed that the percentage change of daytime PM 10 , PM 2.5 , CO, and NO 2 concentration during the lockdown in Colombo (Kandy) is –42.3% (–39.5%), –46% (–54.2%), –14.7% (–8.8%) and –82.2% (–80.9%), respectively. In both cities, the response of NO 2 to the lockdown was the most sensitive. In contrast, daytime O 3 concentration in Colombo (Kandy) has increased by 6.7% (27.2%), suggesting that the increase in O 3 concentration was mainly due to a reduction in NO x emissions leading to lower O 3 titration by NO. In addition, daytime SO 2 concentration in Colombo has increased by 22.9%, while daytime SO 2 concentration in Kandy has decreased by –40%. During the lockdown period, human activities were significantly reduced, causing significant reductions in industrial operations and transportation activities, further reducing emissions and improving air quality in two cities. The results of this study offer potential for local authorities to better understand the emission sources, assess the effectiveness of current air pollution control strategies, and form a basis for formulating better environmental policies to improve air quality and human health.","PeriodicalId":7402,"journal":{"name":"Aerosol and Air Quality Research","volume":"1 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70293709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Analysis of Harmful Heavy Metals and Carbonaceous Components in Urban School PM2.5 城市学校PM2.5有害重金属及碳质成分分析

IF 4 4区环境科学与生态学

Aerosol and Air Quality Research Pub Date : 2023-01-01 DOI: 10.4209/aaqr.220335

Seok Won Kang, Sumin Lee, Jiyou Kwoun, Tae-Jung Lee, Youngchul Jo

引用次数: 0