Abstract
The adsorption of Methylene Blue on Yeong-Il bentonite which was treated by aqueous NaOH, $Na_2SO_4 or NaHSO_4 solution respectively, varying concentrations, temperature and time, was studied. In case of treatment with NaHSO_4 solution, slight improvement of the adsorption of Methylene Blue on bentonite was observed. With Na_2SO_4$ solution, the best results obtained when bentonite was treated with 1 N of the solution for 2hr at $100^{\circ}C$, and the adsorption capacity of the product was 3 times better than that of original bentonite. At the higher concentration and the higher temperature than above, faujasite was formed. With NaOH solution, the best condition was in 1N solution for 1hr at $100^{\circ}C$ and the adsorption capacity of the product was 3.3 times better than that of original bentonite. At the higher concentration of the treating agent and at the higher temperature than above, hydroxysodalite was formed.
영일 bentonite를 여러 농도의 NaOH, $Na_2SO_4 또는 NaHSO_4 용액으로 처리온도와 처리 시간을 달리하여 처리한 시료의 Methylene Blue 흡착력을 조사하였다. NaHSO_4용액으로 처리했을 경우에는 Methylene Blue 흡착력이 거의 개선되지 않았다. Na_2SO_4$ 용액으로 처리했을 경우에는 1N 용액으로 $100^{\circ}C$에서 2시간 처리했을 경우가 가장 좋았으며, 원시료의 3배의 흡착력을 나타내었다. 더 높은 농도와 더 높은 온도로 처리하면 Faujasite이 생성됨을 알았다. NaOH용액으로 처리했을 경우의 가장 좋은 처리조건은 1N, 1hr, $100^{\circ}C$이고 원시료의 3.3배의 흡착력을 나타내었다. 더 높은 농도와 더 높은 온도인 경우에는 hydroxysodalite이 생성됨을 알았다.