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정일록(Il-Rok Chung),엄명도(Myoung-Do Eom),김종춘(Jong-Choon Kim),김태승(Tae-seung Kim),류정호(Jung-Ho Yoo),임철수(Cheol-Soo Lim) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.7
In recent years, environmental damage to urban area becomes serious problem due to the exhaust emissions by increasing the number of vehicle. Especially, diesel particulate matters(DPM) are hazardous air pollutants to human health and environment. The reduction technologies of exhaust emissions from diesel engines are improvement of engine combustion, fuel quality and development of diesel exhaust aftertreatment. In this study, a diesel oxidation catalyst(DOC) that is one of diesel exhaust aftertreatments was made for performance evaluation. It was tested for NA and turbocharged engine by D-13 mode that currently be used for regulation driving test mode in Korea Scanning mobility particle sizer(SMPS) was used for the analysis of the particle size distribution with and w/o DOC. As the results, for NA and turbocharged engine, CO, THC, DPM was respectively reduced 85.7, 40.7, 3.3% and 79.1, 53.1, 11.6% by DOC. Test results of panicle size distribution was showed that panicle number is 10^7 -10^8 per cm^3, 2 x 10^5 - 5 X 10^5㎍/㎥ for weight concentration and 100 - 200nm for panicle mean size in diesel engine and there is no effect to reduce the particle concentration by the DOC.<br/>
윤정기,김동호,김태승,박종겸,정일록,김종하,김혁,Yoon, Jeong-Ki,Kim, Dong-Ho,Kim, Tae-Seung,Park, Jong-Gyum,Chung, Il-Rok,Kim, Jong-Ha,Kim, Hyuk 한국지하수토양환경학회 2009 지하수토양환경 Vol.14 No.3
우리나라 토양 중 중금속 자연배경농도를 비교 평가함으로써 토양오염기준 설정을 위한 과학적 근거를 마련하고자 전국 주요 지질단위인 대동층군, 백악기화강암, 옥천층군, 조선누층군, 평안층군, 경상누층군, 쥬라기화강암, 화산암, 변성암등 산림지역 총 92개 지점에 대한 표토를 0.1N 염산 가용성 시험방법 및 왕수 시험방법으로 분석한 결과, 왕수시험방법에 의한 자연함유량 평균값(mg/kg)은 Cd 0.287, Cu 15.26, Pb 18.43, Cr 25.36, Zn 54.27, Ni 17.68, As 6.83으로 조사되었으며, 가용성 시험결과 평균농도(mg/kg)는 Cd 0.040, Cu 0.48, Pb 3.06, Cr 0.09, Zn 1.54, Ni 0.27, As 0.089로 나타났다. 이들 시료의 가용성 평균 농도는 왕수 시험방법의 평균농도에 비하여 각각 Cd 13.9%, Cu 3.1%, Pb 16.6%, Cr 0.4%, Zn 2.8%, Ni 1.5%, As 1.3% 수준으로 낮게 평가되었다. 또한 가용성 시험방법과 왕수 시험방법에 의한 중금속 측정값 간의 상관계수는 0.24~0.88의 범위로 나타났으며 Cd > Pb > Cu > Ni > Cr > Zn $\approx$ As의 순으로 감소하였다. This study was conducted in order to get the scientific background for soil pollution criteria. The 92 soil samples derived from various geological units were taken and analyzed to survey natural heavy metal background levels using aqua regia digestion method and 0.1N HCl extraction method. From these results, the average natural contents of metals were 0.287 mg/kg for Cd, 15.26 mg/kg for Cu, 18.43 mg/kg for Pb, 25.36 mg/kg for Cr, 54.27 mg/kg for Zn, 17.68 mg/kg for Ni, 6.83 mg/kg for As by the aqua regia method, and 0.040 mg/kg for Cd, 0.48 mg/kg for Cu, 3.06 mg/kg for Pb, 0.09 mg/kg for Cr, 1.54 mg/kg for Zn, 0.27 mg/kg for Ni, 0.089 mg/kg for As by the 0.1N HCl extraction method. Ratios of soluble contents and total contents were Cd 0.14, Cu 0.03, Pb 0.17, Cr 0.004, Zn 0.03, Ni 0.02, As 0.013 and the correlation coefficients of soluble contents and total contents were 0.24(As), 0.88(Cd), 0.43(Cr), 0.65(Cu), 0.70(Pb), 0.61(Ni), 0.24(Zn). The correlation factor decreased in the order of Cd > Pb > Cu > Ni > Cr > Zn $\approx$ As.