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신정남,노성혁,정상락,오길록,김미경,육운수,Shin, Joung-Nam,Roh, Sung-Hyeuk,Jung, Sang-Rak,Oh, Gil-Rok,Kim, Mi-Kyoung,Yook, Woon-Soo 한국지하수토양환경학회 2014 지하수토양환경 Vol.19 No.6
The BTEX contamination of soil around gas station in Korea was investigated in 53 gas stations in 2013 by official test method on soil pollution. Each gas station was divided into oil tank area, line area, and surrounding area. The concentration of BTEX in 1066 sites of 53 gas stations was N.D.~ 3437.36 mg/kg. The order of average concentration for area was as follows: line area ($20.91{\pm}144.79mg/kg$) > tank area ($15.11{\pm}110.08mg/kg$) > surrounding area ($10.79{\pm}111.40mg/kg$). It was the number of sampling site exceeding regulatory levels at surrounding area the most at all. The average concentration of xylene was the highest, while that of ethylbenzene was the lowest.
오종민(Jong Min Oh),노성혁(Sung Hyeuk Roh) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.5
In this study, a hydrocyclone operated by centrifugal force was examined as a part of dredge system of lake sediments. It helps dehydration of the sediments and enables the classification of fine particles in the stable and sanitary treatment. Several experiments were performed focusing on the separation efficiency under the condition of room temperature with virtual sediment samples and simulated particles. As a result of the experiment, it was found that the apex size and inlet pressure greatly affected the cut diameter(d_(50)) and reduced efficiency.