应用微波消解法处理木质活性炭

Digestion of Woody Activated Carbon by Microwave Energy

利用微波消解技术研究了消解条件对木质活性炭消解前处理的影响,研究发现:消解温度、消解时间、消解酸体系是影响消解效果的关键因素。不同粒度0.076～0.918 mm的糖液脱色炭在8 mL(6 mL HNO3+1 mL H2O2+1 mL HF)消解酸体系,220℃下保持30 min的微波消解条件下都可以消解完全,且不同种类的木质活性炭都可以在此条件的基础上通过适当的提高消解温度、延长消解时间、增加消解酸用量的方法消解完全。

This paper deals with the effect of digestion conditions on pre-treatment of woody activated carbon by microwave diges- tion method. The results showed that the critical factors on digestion reaction are digestion temperature, digestion time and diges- tion acid system. Different size of granulate activated carbon can be digested completely under microwave energy with acid system of 8 mL（6 mL HNO3 ＋ 1 mL H202 ＋ 1 mL HF） at 220 ℃ for 30 rain. It was found that different kinds of woody activated carbons could be digested by higher temperature, expanding digestion time and increasing dosage of acid.