Modification of the cordierite by microwave-induced treatments chlorinated organic compounds

• Main Authors: Chih-He Wang, 王志河
• Other Authors: Chih-Ju Jou
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/14339672828565922158

碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程所 === 97 === In this research, modification of the cordierite in aqueous solution is induced by microwave energy which accelerates oxidation and the dechlorination rate. In the experiment which modification of the cordierite degrades chlorobenzene in water, 2g of modification of the cordierite can degrade contaminants, and the degradation rates in the normal atmospheric temperature are 16%. Obviously, 2g of modification of the cordierite has a higher removal rate than 1g, and thus the more the modification of the cordierite, the higher the removal rates. When the reaction temperature for chlorobenzene in aqueous solution is kept at 40℃, 50 ℃, and 60 ℃, the degradation rates increase to 26%, 38%, and 49%, respectively. The increase of reaction temperature in aqueous solution will enhance the molecular kinetic energy and the number of collision per unit time; thus, lead to a higher removal rate. In the experiment which modification of the cordierite degrades chlorinated organic compounds in water under a microwave field, chlorobenzene and perchloroethylene are degraded in 250 Watts. Under the same conditions, which the quantity is 2g, the removal rates of chlorobenzene and perchloroethylene are 81% and 88%, respectively. With 250 watts microwave power and the number of repetitions as once, twice, and three times, the removal rates for modification of the cordierite are 84%, 74% and 71, respectively. When the microwave power is as 150 watts, 250 watts, and 350 watts, the removal rates are 55%, 84% and 95%, respectively. Because of longer microwave functioning time and more microwave power, more microwave energy is absorbed by modification of the cordierite. Therefore, it is proved that microwave energy can effectively induce modification of the cordierite, and thus degrade chlorinated organic compounds in water. Furthermore, it decreases reaction time and increases removal rates.