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RISS 인기검색어
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- 저자 : 하훈 ( Hun Ha ) (검색결과 4 건)
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총유기탄소 연속자동측정기를 이용한 산업폐수 유기물관리 방안
오은하 ( Eun-ha Oh ),김재령 ( Jae-lyeong Kim ),박귀환 ( Gui-hwan Park ),하훈 ( Hun Ha ),양수인 ( Su-in Yang ),이용운 ( Yong-woon Lee ) 한국환경분석학회 2016 환경분석과 독성보건 Vol.19 No.4
The reduction of organic loading in waste water is the one of the chief purposes of waste water treatment processes. In this study, we measured the movement of organic matter continuously during the treatment process and monitored its concentration by using online TOC analyzer. Using this method, we attempted to evaluate the effectiveness organic matter management using with a online TOC analyzer. We also attempted to develop waste water treatment monitoring technology. Wastewater treatment plants that processed waste from basic petrochemical compound manufacturing facilities using chemical and biological treatments, that resulted in acidic or alkaline waste waters were investigated. Two kinds of inlet waters and one kind of mixing water were studied to monitor the movement of organic matter. Waste water influx and settling tank, aeration tank, and filter were used to monitor three kinds of water remotely. Laboratory and online measurement results were compared periodically to verify the reliability of the test results. After real-time monitoring, the movement of organic materials in inlet water and the impact of organic matter on loading changes were verified during the waste water treatment process. This monitoring was carried out twice over six weeks. The first attempt focused on quality control and adjustment of the measurement conditions and the second one focused on the actual monitoring. Due to insufficient pH control due to the influx of unknown alkaline samples, abnormal results were estimated in the first attempt, and reliable results were only obtained in the second attempt. More than 10 times the expected amount of abnormal results were obtained ; these can be attributed to high wastewater tank cleaning and process work. In conclusion, we were able to determine the effectiveness of real-time monitoring of organic matter movement in waste water treatment plants and suggest improvements for long term monitoring and automatic treatment of waste water.
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숲속 공기와 주변 우점수목 정유의 모노테르펜류 분포 비교
오길영 ( Gil Young Oh ),서윤규 ( Yun Gyu Seo ),박귀환 ( Gui Hwan Park ),김익산 ( Ik San Kim ),배주순 ( Ju Soon Bae ),박송인 ( Song In Park ),하훈 ( Hun Ha ),양수인 ( Soo In Yang ),이지헌 ( Ji Hun Lee ),이완진 ( Wan Jin Lee ) 한국산림과학회 2013 한국산림과학회지 Vol.102 No.3
The concentration of terpene (18 species) was measured from spring to fall in ambient air and essential oil at three different forests located in Jeollanamdo province. Sampling was conducted at 4-hour-interval a day of each season. In the ambient air, α-pinene, β-pinene and 2-carene were the most abundant compounds throughout the sampling periods and areas. The highest three-season average concentration of total terpene was 2,597 pptv at Jeamsan(Mt.) in Boseong which was predominantly populated by Pinaceae. The seasonal averages were observed to peak during spring with their max at Palyeongsan(Mt.) in Goheung and Jeamsan(Mt.) in Boseong, and during fall at Woodland in Jangheung. Most of terpenes had diurnal variations with higher concentrations during the daytime, and lower during the nighttime. However in essential oil, the highest annual average concentration of total terpene was 798 μg/dry-g at Goheung which was predominantly populated by Chamaecyparis obtusa. Also, the component proportion ratio showed different distribution between ambient air and essential oil. From the results of this study, we suggest that Chamaecyparis obtusa species is more useful, and younger tree is more economical than older one, and spring is the best season for lumbering in order to use essential oil.
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택사추출액이 benzo(a)pyrene에 의해 유도된 간장해에 미치는 영향
尹水弘,徐旼志,河勳 대구효성가톨릭대학교 1996 연구논문집 Vol.52 No.2
The protective and therapeutic effects of Alismae Rhizome extracts depending on solvent polarity on rat liver injury induced by benzo(a)pyrene were investigated. As parameters in serum and liver, alkaline phosphatase, glutamate oxaloacetate transaminase and glutamate pyruvate transaminase activities were observed. The results were as follows: B(a)P intoxication significantly increased alkaline phosphatase, transaminase activities of serum and liver compared with normal group. Especially CHCI₃fraction revealed the most powerful liver protective and/or therapeutic effect of 4 extracts in serum transaminase activities and in hepatic alkaline phosphatase and glutamate oxaloacetate transaminase, maybe due to presence of alkaloid, triterpenoid and flavonoid in this fraction. Above-mentioned results strongly suggested that Alismae Rhizoma be a promising liver-protective drug. So more study will be needed to find principle hepatotropic Alismatis Rhizoma.
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