daehanhwangyeonggonghaghoeji最新文献

{"title":"Analysis of Changes and Statistical Characteristics in PM-2.5 based on the Seasonal Management Data","authors":"Hyunjun Ahn, Dongju Kim, Okgil Kim, Jae-Bum Lee, Daegyun Lee","doi":"10.4491/ksee.2022.44.8.276","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.8.276","url":null,"abstract":"Objectives : This study aims to identify the changes and statistical characteristics of the observed concentration data of fine particles (PM-2.5), one of the air environment indicators, and to analyze the variability of observation data in South Korea based on the statistical significance of the observation data.Methods : We analyzed the changes and characteristics of daily average PM-2.5 observations based on descriptive statistics (the basic statistical and frequency analysis), and inference statistics (analysis of variance and post-hoc analysis) from December to March for the period 2015 to 2021.Results and Discussion : Through ANOVA analysis and post-hoc analysis, it was confirmed that there was a statistically significant difference in the observed PM-2.5 as of the winter of 2019. Before 2019, the frequency of observed data greater 30 µg/m3 was relatively more than after 2019, and on the contrary, the frequency of observed data less than 20 µg/m3 was smaller than after 2019. After 2019, the frequency of high-concentration observations greater than 50 µg/m3 was insignificant, and on the contrary, the frequency of observations less than 20 µg/m3 was more than before 2019. As a result, It’s an average difference of 7.5 µg/m3 between before and after 2019, and it was reduced by about 24% compared to the average before 2019. Meanwhile, as a result of examining the weather influence (wind direction and wind speed) to analyze the causes of the observed data differences before and after 2019, no significant differences were identified between the two periods due to the influence of meteorological conditions.Conclusion : The observed concentration of PM-2.5 data set in South Korea showed variability as of the winter season of 2019 at the significance level of 5%. The variability could be more attributed to anthropogenic activities and socio-environmental changes such as COVID-19 rather than natural environmental factors such as meteorological factors. In order to more effectively manage air quality, it is necessary to identify social changes and their flows, and at the same time conduct continuous and systematic research such as data expansion and analysis technique development.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44643485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation on applying Condensate from Food Waste Dry Process as External Carbon Source to Biological Denitrification Process","authors":"J. Jeung, Tae Young Kim, Yu Kyung Kim, Jea-Jun Song, S. Chang, W. Chung","doi":"10.4491/ksee.2022.44.7.235","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.7.235","url":null,"abstract":"Objectives:In this study, the applicability of dry condensate generated from food waste dry feed conversion process was evaluated as an external carbon source to increase the efficiency of the biological denitrification process.Methods:The experiment was carried out in the form of a batch test, and dry condensate was injected into each reactor according to the COD and T/N ratio (C/N ratio). Then, the reactor was operated under anoxic conditions for 5 hours, and nitrate nitrogen was analyzed at intervals of 1 hour.Results and Discussion:The dry condensate from food waste showed a low nitrogen content (T-N 220 mg/L) compared to a high organic matter content (TCOD 21,863 mg/L), and was analyzed to satisfy the conditions of an external carbon source in the denitrification process. And as a result of the experiment, it was found that the nitrate nitrogen removal efficiency was up to 76% after 5 hours at a C/N ratio 7.50:1, which was significantly increased compared to the control which was without condensed water (removal efficiency 4%). Moreover, the removal efficiency of 28% was exhibited even at the C/N ratio 0.95:1, which exhibited the lowest efficiency. In addition, as a result of calculating the specific denitrification rate (SDNR) for each C/N ratio, 7.50:1 was found to be as 0.0726 mg NO3-/mg VSS/d, which was significantly increased than that of control as 0.0038mg NO3-/mg VSS/d.Conclusion:Based on these results, it is judged that it is possible to utilize the dried condensate of food waste as an external carbon source in the denitrification process.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47502520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon Dioxide and Particulate Matter Generation Analysis and Policy Suggestions in Drive-thru Service System","authors":"Junbeum Kim, Soon-Bark Kwon, Jaeryeong Song","doi":"10.4491/ksee.2022.44.7.242","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.7.242","url":null,"abstract":"Objectives:Recently, during two-three years of the COVID-19 pandemic, the drive-thru service system has been one of the most actively used non-face-to-face systems to reduce the risk of infection. The business of coffee shops and fast-food restaurants using drive-thru service systems keeps growing. However, carbon dioxide and particulate matter problems in idle running, including traffic congestion and pedestrian safety issue, were brought up in the drive-thru service systems. In this study, carbon dioxide and particulate matter generation were calculated. Also, we proposed existing problems, improvements, and policy issues.Methods:We calculated the carbon dioxide and particulate matter generation in the idle running of vehicles in drive-thru service using several assumptions, the number of vehicles, the idle running time, and emission factors.Results and Discussion:We provided the carbon dioxide and particulate matter generation in the drive-thru service system. Also, we proposed and explained the existing problems, improvements, and policy issues; employees’ respiratory health problems, installation of particulate matter reduction and monitoring system, “Idle Stop & GO” and eco mode use, Performance of environmental improvement charge, single-use cup & product and collection issue.Conclusion:More accurate calculations and studies are needed using more good data such as the number of vehicles, the idle running time, and emission factors. More active policy applications should be considered with revealed problems and proposed improvements in this study.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43052512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Individual and Mixture Toxicity of Heavy Metals using Semi-continuous Type Sulfur Oxidizing Bacteria (SOB) Bioreactor","authors":"Seung-Ha Kim, Heonseop Eom, Woochang Kang, Sang-Eun Oh","doi":"10.4491/ksee.2022.44.7.225","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.7.225","url":null,"abstract":"Objectives:In this research, individual toxicity evaluation of heavy metals (Hg2+, Cr6+, Cd2+) was performed using a semi-continuous type bioreactor based on changes in the activity of sulfur oxidizing bacteria(SOB), and the purpose is to evaluate the toxic interaction of heavy metals through mixture toxicity evaluation and prediction modeling based on individual toxicity evaluation.Methods:SOB were separated into a reactor, and then the culture medium and heavy metal influent were automatically injected at 1-hour intervals under the optimized conditions. Heavy metal mixture influent for composite toxicity evaluation was produced and tested based on the individual EC50 value of each heavy metal based on the change in electrical conductivity(EC). Based on the results of the mixture toxicity evaluation, the CA, IA, and CI models are implemented, and after comparison with the actual experimental values, similarity with the model was verified through the MDR index. And the type of interaction (synergism, antagonism) was evaluated by CI value.Results and Discussion:In case of individual toxicity evaluation experiments, the individual EC50 of each heavy metal was derived at Hg2+ 0.71mg/L, Cr6+ 1.02 mg/L, and Cd2+ 8.82 mg/L in the order of strong toxicity. As a result of performing a combined toxicity evaluation based on individual EC50 values, it was judged that the combination of Hg2++Cd2+ showed a strong similarity with the IA model and no toxic interaction was developed, but all the remaining combinations were with the CI model. A similar relationship was shown and the existence of toxic interactions could be determined. As a result of analyzing the CI value, synergistic effects appeared in all combinations in which the interaction existed, and based on this result, it was possible to determine that Cr6+ is a factor that induces the toxic interaction. Conclusion:This study allowed a real-time toxicity monitoring system for SOB to verify sensitive toxicity detection for functional and non-essential metals. In addition, most heavy metal combinations generate synergistic effects during toxic interactions, and additional research on heavy metals and organic pollutants other than heavy metals used in this study will result in a more systematic ecotoxicity monitoring system.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45468766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogen Production of Clean Energy by Partial Oxidation of Methane over M(1)-Ni(5)/SBA-15 (M = Tb, Pr, Eu, and Dy) Catalysts","authors":"H. Seo","doi":"10.4491/ksee.2022.44.7.217","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.7.217","url":null,"abstract":"Objectives : In order to solve the environmental problem that is the cause of the global greenhouse effect, We want to evaluate the effects of 1wt% of lanthanum (Tb, Pr, Eu, and Dy) as a promoter added to Ni(5)/SBA-15 catalyst by performing the partial oxidation of methane, the main component of natural gas, to hydrogen over M(1)-Ni(5)/SBA-15 (M = Tb, Pr, Eu and Dy) catalyst and to identify the active site of the catalyst by means of instrumentation such as XPS, FETEM, and EDS.Methods : The catalytic activities of the partial oxidation of methane (POM) to hydrogen as a clean energy over M(1)-Ni(5)/SBA-15 (M = Tb, Pr, Eu, and Dy) catalysts are investigated using a fixed bed flow reactor under atmospheric pressure. The active sites of the catalyst are verified through instrumental analysis with XPS, FETEM, and EDS.Results and Discussion : The XPS results show that when 1wt% of Eu is added to the Ni(5)/SBA-15 catalyst, the atomic percent of Ni2p3/2 is increased from 0.12% to 0.15%, and the oxygen atomic number including lattice oxygen and oxygen vacancies is increased 1.32 times compared to that of the Ni(5)/SBA-15 catalyst. Further, the O1s characteristic peak is chemically shifted toward the lower binding energy. The FETEM images show that the nanoparticles of Ni and Eu are uniformly distributed on the surface of a reduced Eu(1)-Ni(5)/SBA-15 catalyst. The EDS mappings of Eu, Ni, O, and Si are confirmed. It is believed that the activity of the catalyst was improved by increasing the dispersion of nanoparticles of Ni0 on the surface of the catalyst due to the increased mobility of oxygen by creating oxygen vacancies. Methane conversion of Ni(5)/SBA-15 catalyst was deactivated rapidly after the reaction time of 12h whereas M(1)-Ni(5)/SBA-15 (M = Tb, Pr, Eu, and Dy) catalyst showed constant and stable catalyst activity until 12h ~ 50h. It is also considered to be the case that the sintering of Ni particles is prevented by the strong metal support interaction (SMSI) effect between Eu3+, Ni2+, and the SBA-15 carrier, and the stability of the catalyst is thereby maintained. The hydrogen yield of catalyst was in the order of Eu(1)-Ni(5)/SBA-15(57.2%, 25h) >> Dy(1)-Ni(5)/SBA-15 (49%, 14h) > Pr(1)-Ni(5)/SBA-15 (43.1%, 29h) > Tb(1)-Ni(5)/SBA-15 (42.8%, 25h).Conclusion : The Ni(5)/SBA-15 catalyst was showed that the conversion of methane was rapidly reduced after a reaction time of 12h, while when 1wt% of lanthanum (Tb, Pr, Eu and Dy) as a promoter was added to the Ni(5)/SBA-15 catalyst, the conversion of methane and yields of hydrogen were showed constant and stable catalytic activity in the reaction time of 12h to 50h. It is believed that the conversion of methane was improved by increasing the dispersion of nanoparticles of Ni0 on the surface of the catalyst due to the increased mobility of oxygen by creating oxygen vacancies. Moreover, sintering of Ni0 nanoparticles on the surface of M(1)-Ni(5)/SBA-15 (M = Tb, Pr, Eu, Dy) catalyst is prevented by strong m","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49457852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption of Levofloxacin on Microplastics in Aqueous Solution","authors":"Jooyoung Lee, Jeong-Ann Park","doi":"10.4491/ksee.2022.44.6.195","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.6.195","url":null,"abstract":"Objectives : Recently, microplastics (MPs) is observed at surface water in worldwide because of massive use of plastics. Since MPs have a large specific surface area, they could provide adsorption sites to water contaminants such as Levofloxacin (LVF). LVF is one of widely used antibiotics and is detected in surface water. Therefore, the aim of this study is to evaluate adsorption trend of LVF on polypropylene (PP) and polyethylene(PE) microplastics in aqueous solution.Methods : For kinetic adsorption experiment, 0.02 g of PP and PE MPs were placed in glass vials and mixed with LVF solution (10 mg/L) for 1-48 hours. And the experimental data was fitted to pseudo-first order and pseudo-second order. For isotherm adsorption experiment, initial LVF concentrations were varied from 1 to 25 mg/L for 24 hours and the results were applied to Langmuir and Freundlich models. The Thermodynamic adsorption experiment was conducted in the temperature range of 298-318 K. Each cations (Na+, Ca2+, Cu2+, Cr3+, Pb3+) and LVF solution were both reacted with the MPs to determine effect of LVF adsorption when cations were coexistence.Results and Discussion : Based on the FT-IR analysis, it was confirmed that the prepared PP and PE MPs were consisted of the respective single polymer. The kinetic experiment results showed that LVF adsorption on PP and PE MPs reached equilibrium at 24 hours with adsorption capacities of PP (0.748 mg/g) and PE (0.801 mg/g) MPs, respectively. Kinetic data of PP MPs was well fitted to the pseudo-first order (R2=0.986) model, while the data of PE MPs was described well by the pseudo-second order (R2=0.992) model. The results of the isotherm experiments were explained well by the Freundlich model (R2>0.97), indicating that multilayer adsorption occurred in both MPs. The thermodynamic experiments showed that LVF adsorptions on each MPs were exothermic reaction and physical adsorption process. Cations can inhibit the adsorption of LVF to the MPs.Conclusion : This study shows that LVF could be adsorbed to PP and PE MPs in aqueous solution and its adsorption capacity can be changed according to the various factors: characteristics of polymer, reaction time, initial concentration of LVF, temperature, and coexistence of cations.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42501618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption-enhanced sonophotocatalytic removal of tetracycline from water using ceria-zirconia (x)CeO2-(1-x)ZrO2 binary oxide nanocatalyst","authors":"Gyuri Kim, Yeonji Yea, Sejoon Park, Seong-Rye Byeon, Seungbeom Seo, Jun-Sung Cho, C. Park","doi":"10.4491/ksee.2022.44.6.203","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.6.203","url":null,"abstract":"Objectives : Tetracycline (TC) antibiotics have a risk of causing gastrointestinal and hepatic disorders and, in rare cases, photosensitivity and deposition in bone tissue.Methods : Therefore, it is urgent to develop a technology that can completely remove TC remaining in the water. In this study, a new type of sonophotocatalytic decomposition system that can efficiently decompose TC, a water-based recalcitrant trace pollutant, was proposed.Results and Discussion : As a sonophotocatalyst, xCeO2-(1-x)ZrO2 (x = 0, 0.25, 0.5, 0.75, and 1) binary nanocomposites were synthesized by hydrothermal methods, followed by X-ray diffraction, Fourier-transform infrared spectroscopy, field emission scanning electron microscope, UV-Vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller surface area techniques. Interestingly, the 0.75CeO2-0.25ZrO2 (CZ0.75) nanocomposite had low adsorption and removal ability of TC in the absence of light, but due to the synergistic effect of the material and the advanced treatment system, the remaining TC was removed by 89.2% under sonophoto irradiation for 60 min. For CZ0.75, the effect of operating factors such as initial pH of solution, catalyst dosage, reaction time, initial TC concentration, and ultrasonic intensity was studied and the mechanism was analyzed.Conclusion : In addition, through LC-MS analysis, intermediate products obtained in the TC degradation process using the CZ0.75 catalyst and the TC degradation pathway were identified.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45588991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study on the Treatment of Hydrofluoric Acid Wastewater from Semiconductor Manufacturing Processes and the Possibility of Reuse of reclaimed water","authors":"Sujeong Lee, I. Han","doi":"10.4491/ksee.2022.44.6.189","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.6.189","url":null,"abstract":"Objectives : By eliminating fluorine and other ions through precipitation of fluoride and UF, RO membrane filtration using the hydrofluoric acid wastewater generated from the semiconductor production processes, this study aimed to investigate the possibility of the reuse of the reclaimed wastewater for the processes.Methods : For the experiment, firstly, the 2-stage precipitation of fluoride was done using Ca(OH)2 and PAC and it aimed to judge whether the water quality standards for reuse by each market were satisfied by eliminating colloidal particles and then other metal ions through the UF and RO membrane filtration.Results and Discussion : About 93 % of F- was removed through the 1st and 2nd precipitation. It can be also removed ammonium, phosphate ions, through the UF membrane filtration, about 95 % of particulate matter was removed and finally, the water quality for reuse was satisfied through RO filtration.Conclusion : This study found that the fluorine wastewater generated from the semiconductor production processes can be reused by precipitation and filtration methods without going through the existing complicated treatment methods. In the future, through such treatment procedures, it is expected to be able to secure the reuse of the reclaimed wastewater in the process.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41611455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Study on the Distribution of Air Pollutants in Petrochemical Industrial Complex On Summer","authors":"J. H. Jeong, I. Kim, E. H. Oh, J. R. Lee, H. Kim","doi":"10.4491/ksee.2022.44.5.161","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.5.161","url":null,"abstract":"Objectives : Using a mobile laboratory equipped with Proton Transfer Reaction-Time of Flight/Mass Spectrometry (PTR-ToF-MS), we investigate the degree of air pollution level in the petrochemical industrial complex by investigating the distribution characteristics of air pollutants and tracking emission sources.Methods : The research area within the petrochemical industrial complex was measured three times each at dawn, day, night, and the distribution of VOCs at each time was investigated and presented as a pollution map. In the emission source tracking, hot spot (high-concentration) wes found by mobile monitoring, and the emission source was closely tracked by stationary monitoring.Results and Discussion : Acetaldehyde measured in the petrochemical industrial complex was confirmed to have the highest 3 to 5 degrees by direct olfactory method. In most instances the highest concentration was at dawn, potentially due to stagnant pollutants caused by temperature reversal. It was observed that the probability of finding an hot spot was higher during dawn and that it was significantly affected by the wind direction and speed at the time of measurement. When tracking the emission sources, appropriate areas of concern for contamination were selected on the basis of the stationary monitoring results, which were obtained from areas showing high concentrations after mobile monitoring.Conclusion : As a result of the investigation of the distribution characteristics and emission sources of air pollutants in the petrochemical industrial complex, we found that acetaldehyde was the major pollutant and presented an efficient method to search for areas of concern for air pollution. Through these results, it is expected that emission sources can be managed more efficiently.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48186739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristics of Organic Compounds in PM2.5 at Seosan: Comparison of Organic Compounds in PM2.5 at Seoul","authors":"Y. Lee, Zihui Teng, Ki Ae Kim, Kwang-Yul Lee, S. Park, J. Lee","doi":"10.4491/ksee.2022.44.5.150","DOIUrl":"https://doi.org/10.4491/ksee.2022.44.5.150","url":null,"abstract":"Objectives : In this study, we analyzed 56 individual organic compounds in PM2.5 in Seosan, where the large complex emission sources are closely located, to characterize organic compounds distributions in this site.Methods : The sampling of PM2.5 in Seoul was also simultaneously carried out to compare the concentrations and distributions of organic compounds in PM2.5 measured in Seosan.Results and Discussion : The overall concentration of organic compounds (OCs) in Seosan was 383±165 ng/m3 , which was twice as high as the concentration in Seoul (189±67 ng/m3 ). PAHs and levoglucosan concentrations were higher in Seosan than in Seoul, attributing mostly to emissions from fossil fuel combustion and biomass burning. The ratio of Levoglucosan/Mannosan(Levo/Manno) and Levo/K+ plot showed that the type of biomass in the biomass burning at two areas might be different. In addition, the concentrations of 1,3,5-triphenylbenzne and tere-phthalic acid, which are indicators of plastic burning, in Seosan were 2~9 times higher than Seoul, respectively.Conclusion : It suggests that open burning of solid fuels such as biomass and plastic garbage was a key contributor to rising organic aerosol concentrations in Seosan.","PeriodicalId":52756,"journal":{"name":"daehanhwangyeonggonghaghoeji","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42136194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}