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- 저자 : 조성욱(Jo Seong Wook) (검색결과 7 건)
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해양 퇴적물에서 인 용출 차단을 위한 반응성 피복 소재로서 제강슬래그의 적용성 검토
조성욱,박성직,Jo, Sung-Wook,Park, Seong-Jik 한국농공학회 2014 한국농공학회논문집 Vol.56 No.3
We investigated the applicability of steel slag as a capping material in order to minimize phosphorus(P) release into seawater. Steel slag is a byproduct from the iron and steel industries and the use of steel slag has some advantages in respect of both cost and environmental concern. P removal by steel slag were studied in a batch system with respect to changes in contact time and initial concentration. Kinetic adsorption data were described well by pseudo 2nd order model, indicating rate limiting step for P adsorption to steel slag is chemical sorption. Equilibrium adsorption data fitted well to Langmuir isotherm model which describes for single layer adsorption. The maximum P adsorption capacity of steel slag was 7.134 mg-P/L. Increasing the depth of steel slag produced a positive effect on interruption of P release. More than 3 cm of steel slag was effective for blocking P release and 5 cm of steel slag was recommended as the depth for capping of P contaminated marine sediments. Increasing P concentration and flow rate had a negative effect on P removal ratio. It was concluded that the steel slag has a potential capping material for blocking P release from marine sediments.
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엄병환,조성욱,강구,박성직,Um, Byung-Hwan,Jo, Sung-Wook,Kang, Ku,Park, Seong-Jik 한국농공학회 2013 한국농공학회논문집 Vol.55 No.3
The present study was conducted to investigate the adsorption potential of red mud for fluoride removal. Different operation parameters such as the effect of contact time, initial concentration, pH, competing anions, seawater, adsorbent dose amount, and adsorbent mixture were studied. Nearly 3 hr was required to reach sorption equilibrium. Equilibrium sorption data were described well by Langmuir model and the maximum adsorption capacity of red mud was 5.28 mg/g. The fluoride adsorption at pH 3 was higher than in the pH range 5-9. The presence of anions such as sulfate, nitrate, phosphate, and bicarbonate had no significant effect on fluoride adsorption onto red mud. The fluoride removal by red mud was greater in seawater than deionized water, resulting from the presence of calcium and magnesium ion in seawater. The use of red mud alone was more effective for the removal of fluoride than mixing red mud with other industrial waste such as oyster shells, lime stone, and steel slag. This study showed that red mud has a potential application in the remediation of fluoride contaminated soil and groundwater.
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엄병환 ( Byung Hwan Um ),조성욱 ( Sung Wook Jo ),박성직 ( Seong Jik Park ) 한국목재공학회 2014 목재공학 Vol.42 No.4
파쇄한 소나무와 참나무를 수중에서 Pb(II) 제거를 위한 흡착제로서 적용성을 검토하였다. 접촉시간, 초기 Pb(II) 농도, pH, 경쟁이온, 그리고 흡착제 주입량이 Pb(II) 흡착에 미치는 영향을 파악하기 위하여 회분 흡착 실험을 수행하였다. 동역학적 실험 결과, 소나무와 참나무에 Pb(II) 흡착은 유사 1차 모델과 유사 2차 모델 모두 적합한 것으로 나타났다. 평형 흡착 실험 결과는 결정계수가 소나무의 경우 0.956, 참나무의 경우 0.950으로 Freundlich 모델이 적합한 것으로 나타났다. 소나무와 참나무의 Pb(II) 최대 흡착양은 각각 16.853과 27.989 mg/g으로 나타났다. pH가 3에서 9로 증가함에 따라서 소나무와 참나무에 Pb(II) 흡착은 증가하였다. Na+, Ca2+, 그리고 Al3+와 같은 양이온의 존재는 Pb(II) 흡착을 감소시켰다. Pb(II) 흡착은 증류수 조건에서 보다 해수에서 흡착량이 컸으며, 이는 해수에 존재하는 CO32-와 OH- 이온이 Pb(II)와 화합물을 형성하기 때문이다. 본 연구를 통해서 Pb(II)로 오염된 물 정화에 소나무와 참나무가 활용될 것으로 판단된다. Crushed pinewood and oakwood were studied as an adsorbent for Pb(II) removal from aqueous solution. Batch adsorption experiments were carried out to describe the effects of contact time, initial Pb(II) concentration, pH, competing cations, and adsorbent dosage on the Pb(II) adsorption process. Kinetic studies revealed that the Pb(II) adsorption process for pinewood and oakwood followed both pseudo first and pseudo second order model. The Fruendlich model best described equilibrium adsorption data with correlation coefficients (R2) of 0.956 and 0.950 for pinewood and oakwood. The maximum adsorption capacity of Pb(II) onto pinewood and oakwood was found to be 16.853 and 27.989 mg/g, respectively. The Pb(II) adsorption onto both pinewood and oakwood was increased as pH increased in the pH range 3-9. The presence of cations such as Na+, Ca2+, and Al3+ decreased Pb(II) adsorption. The Pb(II) removal was greater in seawater than deionized water, resulting from the presence of CO3 2- and OH- ions in seawater. This study showed that pinewood and oakwood have a potential application in the remediation of Pb(II) contaminated water.
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항정신병 약물이 Cyclooxygenase-2 유전자 발현과 Prostaglandin E_2 농도에 미치는 영향
김종우,조성욱,범재명,윤도준,장환일,송지영 대한생물치료정신의학회 2001 생물치료정신의학 Vol.7 No.2
Objectives : Cyclooxygenase(COX) is the central enzyme in the biosynthetic pathway to prostaglandins from arachidonic acids. The action mechanism of nonsteroidal anti-inflammatory drugs is through inhibition of COX activity and prostanoid biosynthesis including prostaglandin E_2(PGE_2). The antipsychotic drugs are known having an analgesic effects, however its mechanisms of actions of action to pain control was not still clearly proved. In the present study, the effects of antipsychotic drugs(chlorpromazie and clozapine) on the production of PGE_2 and the expression of COX-2mRNA and protein in P815 cell line were studied. Methods : For that purpose, the methods of RT-PCR, western blot and prostagalndin E_2 enzymeimmunoassay were applied. Results : The results showed tha tin P815 cells treated with chlorpromazine, the level of COX2 mRNA was significantly decreased compared to the control cells. And total cellular PGE_2 levels were significantly decreased after treatment with chlorpromazine and clozapine. Conclusion : These results suggest that antipsychotic drugs have revealed their analgesic effect through the inhibition of COX-2 activity and PGE_2 production. And also, these results partly supports the excess theory of prostaglangdins in the pathogenesis of schizophrenia.
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급성 관동맥증후군이 동반된 두개내출혈(intracranial hemorrhage) 1 예
신현주,이우형,서정기,박금수,권준,권은상,심미란,홍의수,조성욱 대한내과학회 1998 대한내과학회지 Vol.55 No.5
Inha University Medical College, Inchon, Korea A 44 years old woman was admitted to Inha University hospital in semicomatose state. An electrocardiogram (ECG), taken in the emergency room, showed ST segment elevation in the precordial leads. She underwent a urgent echocardiography. It showed that there was akinesia of anteroseptal segment from the mid left ventricle to the apex and inferior segment from the mid left ventrile to the lower mid left ventricle. With the impression of acute myocardial infarction (AMI), she underwent a urgent coronary angiography. There was no significant luminal narrowing of the right or the left coronary arteries but the left ventriculography revealed akinesia of an ata4 and diaphramatic segments of the left ventricle. Computerized tomography(CT) of the brain, taken shortly after coronary angiography, showed subarachnoid hemorrhage. The abnormal ECG and echocardiography findings, simulating acute myocardial infarction, were assumed to be caused by coronary vasospasm derived from subarachnoid hemorrhage accompanied by massive adrenergic discharge.
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