HWAHAK KONGHAK, Vol.19, No.3, 207-216, June, 1981
Zeolite 고정층에 의한 염색폐수중의 C.O.D. 성분의 흡착속도
Absorption Kinetics of C.O.D. Component in Dyeing Wastewater by Zeolite Fixed Bed
초록
경북 영일산의 천연 Zeolite를 흡착제로 사용하여 염색폐수를 C.O.D. 성분을 제거하는 고정층 흡착탑의 kinetics를 규명하였다.
고정층 흡착탑의 액상흡착속도를 입상 Zeolite를 사용하여 유속, 충전층의 길이, Zeolite와 모래의 섞음비율 등을 변수로 하여 고찰하였다.
고정층 흡착탑에서의 흡착속도를 측정하고 물질수지식으로부터 액막물질전달용량계수（KLαv）와 흡착제표면물질전달용량계수(Ksαv)를 계산하였다.
입상활성탄과 Zeolite의 흡착 mechanism은 film diffusion과 intraparticle diffusion이 율속이므로 pore diffusivity와 surface diffusivity를 Hashimoto와 Glueckauf의 식을 사용하여 계산하였다. Reynolds No.와 Ksαv와의 관계를 고찰하기 위하여 Reynolds No.와 Sherwood No.를 log-log paper상에 plot한 결과 직선이 되고 그 기울기가 1/3∼1/2이 되었다.
Zeolite와 모래의 섞음비율이 1 : 3인 경우가 Ksαv가 0.3765, pore diffusivity가 1.32 × W-5 ㎠/sec가 되며 흡착능력 및 압력강하가 적당하므로 가장 좋은 비율임을 알았다.
고정층 흡착탑의 액상흡착속도를 입상 Zeolite를 사용하여 유속, 충전층의 길이, Zeolite와 모래의 섞음비율 등을 변수로 하여 고찰하였다.
고정층 흡착탑에서의 흡착속도를 측정하고 물질수지식으로부터 액막물질전달용량계수（KLαv）와 흡착제표면물질전달용량계수(Ksαv)를 계산하였다.
입상활성탄과 Zeolite의 흡착 mechanism은 film diffusion과 intraparticle diffusion이 율속이므로 pore diffusivity와 surface diffusivity를 Hashimoto와 Glueckauf의 식을 사용하여 계산하였다. Reynolds No.와 Ksαv와의 관계를 고찰하기 위하여 Reynolds No.와 Sherwood No.를 log-log paper상에 plot한 결과 직선이 되고 그 기울기가 1/3∼1/2이 되었다.
Zeolite와 모래의 섞음비율이 1 : 3인 경우가 Ksαv가 0.3765, pore diffusivity가 1.32 × W-5 ㎠/sec가 되며 흡착능력 및 압력강하가 적당하므로 가장 좋은 비율임을 알았다.
The kinetics of fixed bed adsorption of C.O.D. component in the waste water from a dyeing mill were studied at 20 ℃ and 1 atm. Pressure with the Zeolite mined out of Yeoungill, Korea. Ratesof liquid phase adsorption in the fixed bed packed with granular active carbon and Zeolite sand mixture were discussed for the flow rate of waste water, for the height of adsorption column, and for the mixing ratio of Zeolite and sand.
In order to determine the kinetics of adsorption in the fixed bed adsorption column, material balance was applied to experimental data obtained from concentration-time profiles of the waste water passing through the bed of adsorbent.
KLαv and Ksαv were calculated from adsorption rate.
Adsorption mechanism of granular active carbon and Zeolite were film diffusion and intratively from the Glueckauf and Hashimoto's equation.
the plots between Reynolds and Sherwood number gave a straight line on log-log chart giving a slope of 1/2 and 1/3.
As a mixing ratio of Zeolite and same 1 : 3 was found as a good transfer correlation giving Ksαv 0.3765 and pore diffusivity 1.2 × 10-5 ㎠/sec.
In order to determine the kinetics of adsorption in the fixed bed adsorption column, material balance was applied to experimental data obtained from concentration-time profiles of the waste water passing through the bed of adsorbent.
KLαv and Ksαv were calculated from adsorption rate.
Adsorption mechanism of granular active carbon and Zeolite were film diffusion and intratively from the Glueckauf and Hashimoto's equation.
the plots between Reynolds and Sherwood number gave a straight line on log-log chart giving a slope of 1/2 and 1/3.
As a mixing ratio of Zeolite and same 1 : 3 was found as a good transfer correlation giving Ksαv 0.3765 and pore diffusivity 1.2 × 10-5 ㎠/sec.