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손진언,이성식 동아대학교 생산기술연구소 1999 生産技術硏究所硏究論文集 Vol.4 No.2
This study focuses on the evaluation of toxicity changes at water treatment by bioassays, which are expected to give much more relable information regarding the effects on human health. Seven pesticides were added to the groundwater to prepare a model pesticide contaminated water. The changes in pesticide concentrations at ozonation and activated carbon treatments do not correspond to the changes in mutagenicity and cytotoxicity. Especially, the concentration of Dichlorvos and Thiobencarb were degraded with ozonation time increasing. However, the treated water showed different mutagenicity and mutagenicity and cytotoxicity, caused by the different reaction byproduct.
Vacuum Condensing Point 와 물질이동에 관한 Sublimatography(3)
손진언,김주봉 한국화학공학회 1973 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.11 No.3
We studied on the sublimatographic characters of sulfur as follows; 1) Vacuum condensing point of sulfur at different heating temperature and vacuum degree is obtained. 2) Amount of sublimation of sulfur is determined quantitatively by the sublimatography. 3) The vapor pressure, molar velocity of sublimation and mass transfer coefficient of sulfur are calculated by experimental data as follows; P_h/P_s=γ (γ=1.03) P_s^n=k G (n=0.977) (γP_s)^n'=k'G (n'=1.0) k_(gav)=1.3985 × 10^-2
Poly(ethylene-co-octene) - Ethylene - 1-Octene 3성분계 혼합물의 상거동
손진언 ( Jin Eun Sohn ),정성윤 ( Sung Yoon Chung ),한상훈 ( Sang Hoon Han ),이상호 ( Sang Ho Lee ) 한국고무학회 2006 엘라스토머 및 콤포지트 Vol.41 No.2
Poly(ethylene-co-15.3 mole% octene) (PEO(15)) - 1-옥텐 2성분계 혼합물과 PEO(15)와 (에틸렌+ l-옥텐) 혼합용매로 이루어진 3성분계 혼합물의 상거동을 160℃와 1,000 bar의 영역까지 측정하였다. PEO(15) - 에틸렌 - 1-옥텐 혼합물에서 에틸렌의 함량이 증가함에 따라 cloud-point 곡선이 측정되는 압력이 급격하게 높아졌다. 에틸렌 함량이 18 wt% 보다 낮을 경우, PEO(15 - 에틸렌 - 1-옥텐 혼합물에서 bubble-point 곡선과 cloud-point 곡선이 모두 관측되었다. 에틸렌 함량이 증가함에 따라 PEO(15) - 에틸렌 - l-옥텐 혼합물에서 bubble-point 곡선이 관측되는 온도 범위는 좁아졌으며, PEO(15) - 에틸렌 -1-옥텐 혼합물이 단일상으로 존재하는 온도-압력 영역이 현저히 감소하였다. 에틸렌 함량에 따라 단일상 영역이 감소하는 것은 PEO(15)와 (에틸렌 + 1-옥텐) 혼합용매 사이에 작용하는 분산인력이 줄어들기 때문이다. 에틸렌을 36 wt% 보다 적게 함유한 PEO(15) - 에틸렌 - 1-옥텐 혼합물의 단일상 영역은 온도가 높아짐에 따라 감소하였다. 이와는 대조적으로 에틸렌을 50 wt% 보다 많게 함유한 PEO(15) - 에틸렌 - 1-옥텐 혼합물의 단일상 영역은 온도가 높아짐에 따라 증가하였다. PEO(15) 용해도를 낮추는 혼합용매 사이의 극성인력과 PEO(15) 용해도를 높이는 혼합용매의 밀도는 온도가 낮아짐에 따라 증가한다. 에틸렌 함량이 50 wt% 보다 많을 경우, 혼합용매들의 극성인력 효과가 밀도 효과보다 커서 온도가 낮아짐에 따라 cloud-point 압력은 증가하였다. 에틸렌 함량이 50 wt% 보다 적을 경우, 혼합용매들의 극성인력 효과가 밀도 효과보다 작아서 온도가 낮아짐에 따라 cloud-point 압력은 감소하였다. Cloud-point data to 160℃ and 1,000 bar are presented with poly(ethylene-co-15.3 mole% octene) copolymers (PEO(15)) in pure 1-octene and mixtures of ethylene - 1-octene. The cloud-point curves for PEO(15) - ethylene - 1-octene mixture dramatically increase in pressure to as high as 1,000 bar with an increasing ethylene concentration. At ethylene concentrations less than 18 wt%, the ternary mixture has bubble-and cloud-point curves. As the ethylene concentration of the ternary mixture increases, the bubble-point curve and the single-phase region reduce. The reduction in the single phase region with increasing ethylene concentrations is the result of reduced dispersion interactions between PEO(15) and the mixed solvent. The single-phase region decreases with increasing temperatures when ethylene concentrations are lower than 36 wt%, whereas the single-phase region increases with temperatures at ethylene concentrations greater than 50 wt%. At ethylene concentrations greater than 50 wt% the effect of the polar interactions of the mixed solvent, which is unfavorable to dissolve PEO, is greater than the effect of the density of the mixed solvent. Therefore, the cloud-point pressures increase with a decreasing temperature. However, at ethylene concentrations less than 50 wt%, the cloud-point pressures decrease with temperature, because the effect of the polar interactions is less than the density effect.
孫晋彦,李成植,金鍾和,全成均 동아대학교 환경문제연구소 1986 硏究報告 Vol.9 No.1
The purpose of this paper was to separate the copper and nickel ions from waste water using supported liquid membrane The effect of a given amount of carrier and ammonia concentration of up-stream was described. We used the LIX65N as carriers. The results were as follows 1. The distribution ratio of copper ions at equilibrium was shown linear increment according o the mole ratio of carrier concentration versus the concentration of metal ions increased to 2.0. The maximum distribution ratio of copper ions exceeded that of nickel by approximately 4-fold when the liquid membrane was saturated by carrier 2. The important parameters governing flux were carrier and ammonia concentration. We compared these two parameters, and then the latter influenced more than the former to get higher flux. The copper ions reacted with ammonia in the up-stream, it formed a complexes of Cu(NH₃)₄^(2+), and then diffused to interface of liquid membrane. 3. The flux of metal ions were increased with enlarging the distribution ratio of ordinary extraction. The principle of coupled transport was carried out by the difference of concentration of hydrogen ions. 4. We can be selectively separated in the mixing soultion of copper and nickel ions using LIX65N as carrier.
손진언,이영식,류동춘 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
Phytoplankton in drinking water source bring about variation of pH and produce turbidity and color. They also cause filter clogging and interference of coagulation-sedimentation line in water treatment process and become THMs precusors which resulted from metabolic material of phytoplankton cells and dissolved used at the oxidation step in water treatment plant forms harmful by-products such as THMs, especially in contact with water containg high phytoplankton concentration. This study investigated effect of phytoplankton removal by ozonation as a replacement for chlorination.