다변량분석법을 활용한 수도권지역의 대기오염측정망 평가

최임조 ( Im Jo Choi ),조완근 ( Wan Keun Jo ),신승호 ( Seung Ho Sin ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.5

The adequacy of urban air quality monitoring networks in the largest metropolitan city, Seoul was evaluated using multivariate analysis for SO2, NO2, CO, PM10, and O3. Through cluster analysis for 5 air pollutants concentrations, existing monitoring stations are seen to be clustered mostly by geographical locations of the eight zones in Seoul. And the stations included in the same cluster are redundantly monitoring air pollutants exhibiting similar atmospheric behavior, thus it can be seen that they are being operated inefficiently. Because monitoring stations groups representing redudancy were different depending on measurement items and several pollutants are being measured at the same time in each air monitoring station, it is seemed to be not easy to integrate or transmigrate stations. But it may be proposed as follows : the redundant stations can be integrated or transmigrated based on ozone of which measures are increasing in recent years and alternatively the remaining pollutants other than the pollutant exhibiting similar atmospheric behavior with nearby station’s can be measured. So it is considered to be able to operate air quality monitoring networks effectively and economically in order to improve air quality.

실내 방향제 사용에 의한 유해 가스상 오염물질 배출 산정 및 노출평가

권기동(Ki-Dong Kwon),조완근(Wan-Keun Jo),신승호(Seung-Ho Shin),이종효(Jong-Hyo Lee),이종현(Jong-Hyeon Lee) 한국환경독성학회 2012 한국독성학회 심포지움 및 학술발표회 Vol.2012 No.5

대기오염제어를 위한 생물살수여과법에서 물질전달계수 실험평가방법에 관한 연구

원양수 ( Yang Soo Won ),조완근 ( Wan Keun Jo ) 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.4

생물학적 방법에 의한 대기오염물질 처리는 기존의 처리방법을 대체할 수 있는 방법으로 각광을 받고 있다. 생물학적 처리방법은 유기화합물 또는 악취가 포함된 저농도 고유량의 공기를 처리하는데 효과적이다. 생물살수여과법을 이용한 대기오염물질 제거에서 물질전달 연구는 공정 최적화를 위해 매우 중요한 부분이다. 본 연구에서는 3상의 물질 전달이 이루어지는 생물살수여과법에서 기체/액체(살수액), 기체/고체(미생물), 액체/고체 물질전달 실험방법 개발과 물질전달 현상을 고찰하였다. 또한 본 연구에서는 각 상간에서 물질전달에 영향을 미치는 인자로 동적적체량, 기/액 유량비, 반응기내 미생물량, 살수액 순환량 등에 대해 고찰하였다. Biological treatment is promising alternative to conventional air pollution control method. Bioreactors for air pollution control have found most of their success in the treatment of dilute and high flow waste air streams containing volatile organic compounds and odor. The studies of mass transfer in biotrickling filters for air pollution control were of importance in order to control and optimize the purification process. The objectives of this study were to develop the experimental methodologies to evaluate the mass transfer coefficients of gas/liquid(trickling liquid), gas/solid(biomass) and liquid/solid in three phase biotrickling filtration. Also, this study characterized the influence factors on mass transfer such as dynamic holdup volume, gas/liquid flow rate ratio, biomass weight in reactor and recirculation rate of trickling medium for each phase of biotrickling filter.

대기오염제어를 위한 생물살수여과법에서 물질전달 Model과 계수에 관한 연구

원양수 ( Yang Soo Won ),조완근 ( Wan Keun Jo ) 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.4

대기오염물질처리를 위한 생물살수여과법에서 물질전달현상을 이해하기 위한 선행 실험결과를 기초로 각각의 운전조건에서 기체/액체(살수액), 기체/고체(미생물)와 액체/고체에서의 model을 이용하여 물질전달계수를 평가하였다. 생물살수여과법에서 기/액에서는 정상상태물질수지, 그리고 액/고와 기/고에서는 동적물질수지를 이용하여 물질전달 model을 확립하고 그 결과를 고찰하였다. 물질전달 model은 여과탑을 일정크기 구획하여, 각 구획에서 동적 물질수지식을 수치해석 전산코드를 이용해 계산하였다. 동적물질수지식을 이용하여 계산된 결과는 실험결과와 비교하여 생물살수여 과법에서 기/액, 기/고, 액/고 각상간의 물질전달계수(K(L)a)를 산정하였다. 본 연구에서는 대기오염제어를 위한 생물살수 여과법에서 물질전달계수를 결정하기 위한 실험방법개발과 model을 이용하여 물질전달현상을 고찰하였다. A fundamental mathematical model for mass transfer processes has been used to understand the air pollution control process in biotrickling filtration and to evaluate the mass transfer coefficients of gas/liquid (trickling liquid), gas/solid (biomass) and liquid/solid based upon experimental results and mathematical model calculations for selected operating conditions. The mass transfer models for the utilization of the steady-state mass balance for gas/liquid, and dynamic mass balance model for gas/solid & liquid/solid in biotrickling filters were established and discussed. The mass transfer model considered the reactor to comprise finite sections, for each of which dynamic mass balances for gas/solid and liquid/solid system were solved by numerical analysis code (numerical iteration). To determine the mass transfer coefficients (K(L)a) of gas/liquid, gas/solid & liquid/solid in a biotrickling filter, the calculation results based upon mass balance equation was optimized to coincide with the experimental results for the selected operating conditions. Finally, this study contributed the development of experimental methods and discussed the mathematical model to determine the mass transfer coefficients in a biotrickling filtration for air pollution control.

실내 공기 수준 톨루엔과 에틸벤젠 제어를 위한 황 도핑 산화티타늄으로 코팅된 가시광선 유도 연속 광촉매 반응기 활용

김종태(Jong-Tae Kim)⋅김모근(Mo-Keun Kim)⋅신명희(Myeong-Hee Shin)⋅조완근(Wan-Kuen Jo) 한국실내환경학회 2008 한국실내환경학회지 Vol.5 No.4

Most of recent visible-light derived photocatalytic studies have been focused on water applications. Even the less-reported gaseous studies have primarily dealt with chemical process stream concentrations than indoor air quality (IAQ) concentration levels. Accordingly, the current study was conducted to establish the feasibility of applying visible-light-induced TiO2 doped with sulfur (S) element to cleanse toluene and ethyl benzene at IAQ levels. The S-doped TiO2 was prepared by applying two popular processes and two well-known methods. For both target compounds, the two coating methods exhibited different photocatalytic oxidation (PCO) efficiency. Similarly, the two S-doping processes showed different PCO efficiency. These results indicate that the coating method and doping process are important parameters which can influence PCO efficiency. Meanwhile, it was found that the PCO efficiency of ethyl benzene was higher than that of toluene. In addition, the degradation efficiency of the target compounds increased as the relative humidity (RH) decreased. The PCO efficiency varied from 44% to 74% for toluene and from 68% to 95%, as the RH decreased. Consequently, it is suggested that with appropriate RH conditions, the visible-light-assisted photocatalytic systems can also become an important tool for improving IAQ.

대구지역 PM10 오염 관리를 위한 시간적 및 공간적 오염 특성 평가

조완근,권기동 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1

Present study analyzed the temporal and spatial characteristics of PM10 pollution in Metropolitan Daegu area based on air pollution monitoring station data and measurements of PM10 concentrations in background area in order to provide essential data for efficient PM10 pollution management. The significant variation of spatial and temporal PM10 concentrations in Daegu area was observed during the study years. The highest maximum PM10 concentration(332 ㎍/m²), average concentration(88 ㎍/m²) and frequency exceeding PM10 daily standard(150 ㎍/m²) were all observed in Namsandong located near a major roadway. The hourly and weekly variations of PM10 concentrations had different pattern for the measurement sites. The monthly and seasonal concentrations exhibited a notable characteristic: the maximum concentration was obtained in spring season, most likely due to Yellow sand effects. Furthermore, this temporal variation of PM10 pollution varied with study site. Meanwhile, the PM10 values measured at the monitoring site, Manchondong, were comparable with those of a control site. The average PM10 concentration ranged from 23 ㎍/ m² to 115 ㎍/ m² with a mean value of 53 ㎍/ m² in the former site and from 22 ㎍/m² to 91 ㎍/m² with a mean value of 45 ㎍/m² in the latter site.