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이산화탄소의 촉진전달에 미치는 변수영향
Parameter Effects on the Facilitated Transport of Carbon Dioxide
HWAHAK KONGHAK, June 1986, 24(3), 227-235(9), NONE
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Abstract
경계층 근사법을 이용하여 sodium bicarbonate와 sodium arsenite가 염기성 수용액막을 통한 이산화탄소의 촉진전달에 미치는 영향을 수용액의 이온세기와 pH의 관점에서 조사하였다. Sodium bicarbonate의 함량이 증가할수록 용액의 pH는 높아지는 반면 막 양단간에 걸친 pH의 차이는 줄어들었다. 같은 이온세기에서 sodium arsenite의 함량이 증가하면 막내부의 bicarbonate이온의 농도구배가 심해졌으며 pH와 그의 기울기는 감소하였다. Sodium arsenite는 이산화탄소의 수화반응의 촉매역할 뿐만 아니라 용액의 pH를 조절해주는 완충작용을 하여 이산화탄소의 전달을 촉진시켜주는 것이 확인되었다.
Effect of sodium bicarbonate and sodium arsenite on the facilitated transport of carbon dioxide through alkaline liquid membrane was investigated in view of the ionic strength and the pH of the solution through the boundary layer approximation. With the increase in the content of sodium bicarbonate, the pH of the solution increased while the difference of pH across the membrane decreased. Under the same ionic strength of the solution the concentration gradient of bicarbonate ion in the membrane increased and the pH and its gradient decreased with the content of sodium arsenite. It was confirmed that sodium arsenite facilitated the transport of carbon dioxide not only by catalyzing the hydrolysis of carbondioxide but also by buffering the pH.