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金春姬,高京淑,安喆偶 한국환경과학회 2000 한국환경과학회지 Vol.9 No.2
The purpose of this study was to determine whether Vermi Cast could be used effectively to remove SO_2 from flue gas, and then to investigate optimum adsorption conditions. The Vermi Cast used as adsorbent was mechanically screened with 8∼20 mesh sieve. The adsorption data for S0_2 were regressed using the Freundlich isotherm. The fit was generally satisfactory (R^2=0.945∼0.982). With the temperature changes from 20℃ to 40℃, the constant k in Freundlich isotherm q_e = kC_e^(1/n), decreased from 1.409 at 20℃ to 0.297 at 40℃, and the exponent 1/n were decreased from 0.343 to 0.134. With the bed depth changes from 10㎝ to 30㎝, the adsorption capacity expressed as m㏖ of SO_2 adsorbed per g of Vermi Cast increased from 0.247 to 0.381. Moisture content is an important parameter in the SO_2 adsorption efficiency. When the moisture content ranging 23∼53% temperature 28℃ the amount of SO_2 adsorbed were observed over 0.3m㏖ SO_2/g Vermi Cast. The best adsorption capacity was 0.487m㏖ SO_2/g Vermi Cast, and it was obtained with moisture content 37%, temperature 20℃. From the above results, it might be concluded that Vermi Cast is effectively available as a good adsorbent to remove SO_2 from flue gas.