http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 채정석 (검색결과 103 건)
- 무료
- 기관 내 무료
- 유료
-
-
실내공기질 숙련도 시험용 표준시료의 균질성 및 안정성 평가
채정석,장미경,김선태,최종우,김금희,홍석영,이진주,김지혜,전준민 한국냄새환경학회 2017 실내환경 및 냄새 학회지 Vol.16 No.4
In this study, the homogeneity and stability of standard samples for proficiency testing in indoor air quality within the country (formaldehyde, benzene, toluene, ethylbenzene, p-xylene, styrene, TVOC) were evaluated. The procedures and statistical analysis methods applied in ISO/IEC 13528 (2009) and KS A ISO Guide 35 (2005) were applied as evaluation methods. The homogeneity evaluation was a statistical analysis of repeated measurements of each of the 11 ports and between the 11 ports concentration data. As a result, the coefficient of variation (CV) was within the range of 1.9%~5.9%. The difference between the ports was found to be insignificant and met the statistical standard specified in KS Q ISO 13528. The stability evaluation was assessed by the change in concentration over the long-term stability of the standard samples stored for 90 days. The coefficient of variation (CV), which was within the range of 2.6%~9.0%, exhibited changes in the concentration of the long-term stored standard samples. However, the results satisfy the statistical standard specified in KS A ISO Guide 35. Overall, there is no significant difference between the homogeneity of the standard samples by the port and the stability of the long-term stored samples. Therefore, it is considered to be an appropriate method to supply standard samples in an indoor air quality proficiency test.
-
축산퇴비를 이용한 돼지사체 매몰처리의 pilot 규모 평가 및 악취물질 배출특성
채정석,전준민,오경철,류희욱,김신도 한국대기환경학회 2017 한국대기환경학회지 Vol.33 No.2
Contaminated livestock disposal method includes burial method using soil. But the slow rate of decay process of carcasses has caused various problems. In this study, 4 pig carcasses (80~90 kg/pig) were buried in livestock compost as a cover material to improve carcasses decaying rate. The result of experiment showed the temperature of the carcass layer remained 40℃ or higher even when the outside temperature dropped below zero. After the experiment, it was confirmed that carcasses in the compost burial was decomposed substantially than the carcasses from soil burial. The moisture content of the compost burial was 40~65%. The pH was affected by ammonia produced by decaying carcasses and the pH level was increased from pH 8.7~8.9 at the beginning of the experiment to 9.3~9.7 at the end of the experiment. The residues of typical odor components in the compost layer were decreased after volatilized and due to decaying carcasses strong odor was observed. The odor intensity evaluation by measured odor substances and olfactory evaluation showed overall favorable correlation, and among the measured odor substances the reduced sulfur compounds (RSC) were found to be dominantly contributing to malodorous substances of decaying carcasses. The above results proved rapid decay rates due to the thermal effects of livestock compost.
-
퇴비를 이용한 구덩이 매몰 처리 시 돼지 사체의 부패 특성
채정석,전준민,오경철,김신도,류희욱 한국냄새환경학회 2016 실내환경 및 냄새 학회지 Vol.15 No.2
Carcasses of pigs were trench buried using either general soil or mature compost as a cover material and the malodorous substances discharged were observed about a year. With the soil burial method, the speed of decay was shown to be dominantly affected by the ambient air temperature. However the compost burial method’s decaying process took place quickly, even ambient air temperature was dropped; it holds the temperature of 40oC or higher. With the compost burial method, there was a period where, the temperature inside the pig carcasses and the temperature of cover-material layer were strongly reversed. From this discovery, level of decay process could be speculated. With the soil burial method there was a trend when malodorous substances concentration was high, the level of concentration in the cover soil was also tends to be high. However, the compost burial method had different result. When malodorous substances concentration was high the level of concentration in the compost cover layer was observed to be lower. This indicates compost burial method shown to intercept and absorb malodorous substances. Furthermore, the compost burial method appears to be able to contribute to deactivate the pathogens by quickly decompose the carcasses at a high temperature.
-
-
-
여수 석유화학산단 인근 주거지역의 대기 중 휘발성유기화합물 농도분포 특성
채정석,전준민,이재영 한국도시환경학회 2020 한국도시환경학회지 Vol.20 No.1
본 연구의 목적은 여수 석유화학산단의 인근 주거지역의 VOCs 농도 분포 특성을 파악하는데 있다. VOCs 측정지점은여수국가산단에서 남쪽 방향으로 약 1.5 km 거리에 위치한 주삼동 지점이며, 4계절 동안 1일 2회 채취하는 방식으로 각계절별 7일간 연속 측정하였다. VOCs 검출빈도는 toluene, ethylbenzene, m,p-xylene, o-xylene, styrene은 100%, benzene 98%, hexane 79% 순으로, 평균농도는 hexane 0.93 ppb > toluene 0.81 ppb > benzene 0.63 ppb > 1,2-dichloroethane 0.49 ppb 순으로 높았다. 측정계절별 VOCs 농도는 대체로 봄과 여름철에 낮고 가을과 겨울철에 농도가 높았다. 오전과 오후중 오전에 농도가 높게 분포하는 특성을 보였다. VOC 성분들 간의 상관성은 유의한 상관관계가 많아, 동일지역의 배출원에서 배출된 VOC 성분들일 가능성이 높았다. 대기 기준성오염물질 중 NO2, CO, SO2과는 유의한 양의 상관성을 보였다. 기존 타 산단지역 연구들과 비교한 결과, 주삼동 지점은 benzene의 농도가 타 지역에 비하여 높았으나, 그 외의 물질들은 대체로 낮거나 유사한 수준이었다. The purpose of this study is to investigate the distribution of VOCs concentration in the residential area of Yeosu Petrochemical Industrial Complex. VOCs measuring point is Jusam-dong, located about 1.5 km south of Yeosu National Industrial Complex. It was measured continuously for 7 days in each season by collecting twice a day for four seasons. VOCs were measured during four seasons in order to understand the characteristics of atmospheric VOCs concentration in Jusam-dong, a residential area near the Yeosu Petrochemical Industrial Complex. The mean concentrations of toluene, ethylbenzene, m,p-xylene, o-xylene and styrene were detected 100%, benzene 98%. The mean concentrations were hexane 0.93 ppb > toluene 0.81 ppb > benzene 0.63 ppb > 1,2-dichloroethane 0.49 ppb. The Seasonal concentration were low in spring and summer, and high in fall and winter. During the daytime and during the afternoon, the daytime concentration was higher than in the afternoon. The correlations between VOCs components were highly correlated with each other. Also there was a significant positive correlation with NO2, CO, and SO2 among air quality parameters. Compared with previous studies on other industrial complexes, the Jusam-dong site had higher concentrations of benzene than other regions, but other materials were generally low or similar.
-
채정석,박경려,전준민,이재영 한국도시환경학회 2020 한국도시환경학회지 Vol.20 No.1
The purpose of this study is to investigate the distribution of heavy metal concentrations in embient of residential areas near Gwangyang Industrial Complex. The heavy metal measuring points were selected as Taein-dong, Geumho-dong and Myododong. Sampling was carried out for 7 days in each season by sampling for 24 hours from 10 AM to 10 AM the next day at all measurement points during the four seasons. The analysis of this study showed that most heavy metals are within the permissible levels. In addition, there was no difference in seasonal fluctuation according to heavy metal components, indicating that all of the survey points in this study were in the same area of influence due to seasonal wind direction. The average enrichment factor of Cd, Cr, Ni, Pb and Zn is over 10, which can be evaluated as a heavy metal component with high pollution level by artificial sources. The results of evaluating the pollution index using domestic and foreign air quality standards exceed 14.3%, and the average of the pollution index was 0.61 to 0.62. These results showed that the level of heavy metal pollution in the residential area was not high. However, the heavy metal contamination effect caused by anthropogenic sources suggests that continuous monitoring is necessary from the acceptor's point of view. 본 연구에서는 광양산업단지 인근 주거지역을 대상으로 대기 중 중금속 농도 분포 특성을 파악코자 하였다. 중금속 측정지점은 태인동, 금호동과 묘도동으로 선정하였다. 시료채취는 4계절 동안 전 측정지점에서 오전 10시에서 익일 오전10시까지 24시간 동안 채취하는 방법으로 각 계절별 7일간 연속 측정하였다. 분석결과, 대부분의 중금속이 기준치 이내로 나타났다. 또한 중금속 성분별에 따른 계절별 변동 양상에 차이를 보이지 않아 본 연구의 조사지점 모두 계절적 풍향에 의한 동일한 영향권에 있는 것으로 나타났다. As, Cd, Cr, Ni, Pb, Zn은 평균 농축계수가 10이상으로 나타나 인위적배출원에 의한 오염도가 높은 중금속 성분으로 평가되었다. 국내외 대기환경기준치로 오염지수를 평가한 결과, 오염지수1을 기준으로 14.3%가 초과됐으며, 오염지수 평균은 0.61~0.62로 나타났다. 이러한 결과를 통해 본 주거지역의 중금속오염도는 높지 않은 결과를 보였으나, 인위적 배출원에 의한 중금속 오염 영향이 있는 만큼 수용체 입장에서 지속적인 모니터링은 필요할 것으로 판단된다.
-
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
