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사격장 납 오염토양 복원을 위한 토양세척시 HCl과 EDTA의 영향 연구
김효식,최상일,Kim, Hyo-Sik,Choi, Sang-Il 한국지하수토양환경학회 2008 지하수토양환경 Vol.13 No.1
본 연구에서는 실제 납 탄알로 오염된 사격장 토양에 대해 토양세척기법을 적용하기위한 lab-scale 실험을 수행하였으며 다음과 같은 결론을 얻을 수 있었다. 토양오염공정시험법과 EPA Method 3050B 분석결과 각각 4,803.5 mg/kg, 9,443 mg/kg으로 나타났다. 회분식 토양세척 실험에서 HCl을 세척제로 사용한 경우 농도증가에 따른 제거율은 로그적인(logarithmic) 경향을 나타내었고 0.1M에서 약 90% 정도 제거되었으며, EDTA는 농도에 비례하여 제거율도 증가하여 0.1 M에서 약 98%의 제거율을 보였다. 교반강도에 따른 시간별 세척효율을 분석한 결과, HCl과 EDTA를 사용한 경우 모두 교반강도의 증가와 비례하여 토양내 제거율이 증가하였으나 200 rpm과 300 rpm에서의 제거율은 유사한 것으로 나타났으며, 반응 초기 10분 이내에 대부분의 용출이 이뤄지고 60분 경과 후에는 제거율 증가가 둔화되었다. Laboratory soil washing experiments with HCl or EDTA were conducted to remediate lead-contaminated soil in a firing range. After lead bullets were removed by standard sieve #18 (1.0 mM), Pb concentrations were measured by EPA Method 3050B (9,443 mg/kg) and Korea Standard Test (4,803.5 mg/kg). The results of the batch test showed that the removal efficiency curve was logarithmic and approximately 90% of lead in soil was removed, when HCl was used. In case of EDTA, the removal efficiency increased proportionally to the concentration of EDTA, up to 98% lead removal with 0.1M EDTA. High mixing strength resulted in increase of removal efficiency and kinetics showed that the most lead was extracted in 10 min.
김효식(Hyo-Sik Kim),김진호(Jin-Ho Kim),류재홍(Jae-Hong Ryu),강석환(Suk-Hwan Kang),김태훈(Tae-Hoon Kim),박노국(No-Kuk Park),우광재(Kwang-Jae Woo) 한국에너지기후변화학회 2017 에너지기후변화학회지 Vol.12 No.1
SOx generated in the combustion process of sulfur-containing fuel was regulated globally along with NOx, CO, fine dust, etc. Currently, processes for SOx removal in flue gas were mainly used the wet methods in a variety of industries. On the other hand, the dry methods has not yet been developed with commercial technology, although it has the advantage of removing SOx in flue gas through physical or chemical adsorption over a wide temperature range. In this paper, the operation or regeneration temperature of the sorbents (such as single oxides, oxides supported on carbonaceous materials, oxides supported on zeolites and mesoporous materials) in the dry methods for removing SOx and the future research direction of this field are summarized.
합성가스로부터 발열반응이 수반된 촉매 반응공정의 온도제어 기술현황
김효식(Hyo-Sik Kim),김진호(Jin-Ho Kim),강석환(Suk-Hwan Kang),류재홍(Jae-Hong Ryu),양희철(Hee Chul Yang),정동용(Dong Yong Chung) 한국에너지기후변화학회 2015 에너지기후변화학회지 Vol.10 No.2
In terms of the abundant reserves of coal, the emerging of shale gas and the utilization of waste, the interest on the production of power, transportation fuel and chemical raw materials using the syngas is growing generally. However, catalytic reaction with a syngas is very important to control the temperature in the reactor due to involve an exothermic reaction. In this work, we introduce for example, with its characteristics of a reactor for producing Methanol/DME, SNG and FT synthetic oil using a syngas.