http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
순환기 반응기에서 ceramic bead에 코팅된 TiO₂ 광촉매를 이용한 MTBE의 광분해
류성필,오윤근 濟州大學校 海洋硏究所 2004 해양과환경연구소 연구논문집 Vol.28 No.2
The objective of this study is to delineate removal efficiency of the MTBE in solution by TiO₂ photocatalytic degradation as a function of the following different experimental conditions : Initial concentration of MTBE, air flow rate in solution, H₂O₂ dosage and pH of the solution. Photodegradation rate was increased with decreasing initial concentration of MTBE. The removal efficiency was 82% after 180 min in the case of MTBE concentration of 100 mg/L but 100% after 180 min in the case of 20 mg/L. Removal efficiency was increased with increasing pH. H₂O₂ dosage and air flow rate in solution.
가상적가치추정법(CVM)을 이용한 제주 해양치유 산업의 경제적 가치 추정 연구
류성필,김민정,권철만,강성혁 한국해양관광학회 2023 해양관광학연구 Vol.16 No.1
This study attempted to provide basic data needed to plan Jeju Marine Healing Industry promotion strategies, and the results found the followings: As people were more aware of the value of Jeju marine resources such as sea water, sea sand, seaweeds and seascape, the expectations for marine healing were higher. Second, as perception of the value of Thalassotherapy increased, expectation effects and intention to use were greater. Third, perception of marine conservation played a mediating role between recognition of marine healing and expectation effects/intention to use. The above results confirm that it is required to enhance the perception of the value of Jeju marine resources after developing high value-added products and verifying and advertising their efficacies along with marine conservation and take necessary actions such as education, policy and legislation for sustainable management and promotion.
순환식 반응기에서 유리판에 코팅된 TiO_2 광촉매를 이용한 유기인계 농약의 광분해
류성필,오윤근 한국환경과학회 2002 한국환경과학회지 Vol.11 No.6
Photocatalytic degradation of chlorpyrifos and diazinon, which are extensively used as an organophosphorous pesticide in the agriculture field, has been investigated with UV-radiated TiO_2 in aqueous phase. Photodegradation rate was increased with increasing pH of the solution. The removal efficiencies of chlorpyrifos and diazinon were 100% after 200 min in pH 9. Photodegradation followed a pseudo-first-order reaction. The rate constants of chlorpyrifos and diazinon were 0.0160min^-1 and 0.0180min^-1, respectively. NO_3^-, PO_4^3-, SO_4^2- and Cl^- were found as end products on the photocatalytic degradation of chlorpyrifos and diazinon with TiO_2/UV.
TiO_2 光觸媒를 利用한 Diazinon의 光分解에 관한 硏究
류성필,오윤근 한국환경과학회 2000 한국환경과학회지 Vol.9 No.2
Considerable interest has been shown in recent years towards utilizing TiO_2 particles as a photocatalyst in the degradation of harmful organic contaminants. In this study, photocatalytic degradation of diazinon which is extensively used as a pesticide in the agriculture field, has been investigated with UV-illuminated TiO_2 in aqueous suspension as a function of the following different experimental parameters : initial concentration of diazinon, TiO_2 weight, UV wavelength, pH of the solution. Photodegradation rate increased with decreasing initial concentration of diazinon and with increasing pH of the solution. Photodegradation rate increased with increasing TiO_2 weight, but was nearly the same at TiO_2 weight of 1 g/ℓ , 2 g/ℓ , i.e., for initial diazinon concentration of 5 ㎎/ℓ . UV wavelength affecting on the degradation rate of diazinon decreased in the order of 254 nm > 312 nm > 365 nm. For TiO_2 weight of 1 g/ℓ and initial diazinon concentration of 5 ㎎/ℓ , the photodegradation removal of diazinon was 100% after 130 min in the case of 254 nm, but 95% in the case of 312 nm, and 84% in the case of 365 nm, after 180 min. The photodegradation of diazinon followed a first order or a pseudo-first order reaction rate. For initial diazinon concentration of 5 ㎎/ℓ , the rate constants(k) in UV and TiO_2(1g/ℓ )/UV system were 0.006 min^-1 and 0.0252 min^-1 at 254 nm, 0.0055 min^-1 and 0.0104 min^-1 at 312 nm, and 0.004 min^-1 and 0.0092 min^-1 at 365 nm respectively.
광촉매를 이용한 Humic Acid 광분해시 공존물질이 광분해에 미치는 영향
류성필,현경자,오윤근 한국환경과학회 2004 한국환경과학회지 Vol.13 No.3
This study aimed at improving the TiO₂ photocatalytic degradation of HA. A set of tests was first conducted in the dark to study the adsorption of HA at different coexisting material concentration. Adsorption rate increased with adding cation ion but decreased with adding bicarbonate ion. The photodegradation of HA in the presence of UV irradiation was investigated as a function of different experimental condition : initial concentration of HA, TiO₂ weight, pH, air flow rate and coexisting material. It was increased either at low pH or by adding cation ion. The increase of cation strength in aqueous solution could provide a favorable condition for adsorption of HA on the TiO₂ surface and therefore enhance the photodegradation rate. It was found that bicarbonate ions slowed down the degradation rate by scavening the hydroxyl radicals.
TiO₂/UV공정을 이용한 수중 MTBE의 광분해 특성
류성필,김성수,오윤근 한국환경과학회 2004 한국환경과학회지 Vol.13 No.3
The objective of this study is to delineate removal efficiency of the MTBE in solution by TiO₂ photocatalytic degradation as a function of the following different experimental conditions : Initial concentration of MTBE, air flow rate in solution, H₂O₂ dosage and pH of the solution. Photodegradation rate was increased with decreasing initial concentration of MTBE. The removal efficiency was 82% after 180 min in the case of MTBE concentration of 100 mg/L but 100% after 180 min in the case of 20 mg/L. Removal efficiency was increased with increasing pH, H₂O₂ dosage and air flow rate in solution.