不同无机质对球磨脱氯的影响及中间产物的研究

Study of Experiment Dechlorination with Different Inorganic Substances and Intermediums by Grinding Method

基于提高脱氯效率的目的,向研磨反应中分别掺杂九种不同的无机质,并对脱氯结果进行比较,结果表明,在过量氧化钙的环境中,二氧化硅的加入有利于脱氯反应的进行,并能大大提高脱氯率,远高于其他八种物质;另外,金属碱性的强弱是影响脱氯效果的一个重要因素;水分的加入不利于脱氯反应的进行.对于研磨后样品随研磨时间的变化,本实验也通过XRD,TG,DTG和FTIR等手段进行了表征,观察发现在5 h之后,脱氯率没有明显变化,但大分子有机质仍然会进行反应,生成小分子有机物质.

For increasing the efficieny of dechlorination, nine kinds of inorganic substances were added in the reaction, and the efficiencies of dechlorination were detected and compared. The final result indicates that with excessive CaO ,SiO2 is advantageous to the dechlorination reaction and has higher performance than the other eight inorganic substances by the grinding method, which greatly increases dechlorination rate. In addition, the effect of alkaline concentration is important to the grinding reaction. On the contrary, water is ineffective to the dechlorination. The degradation intermediums are also characterized by XRD, TG, DTG, HPLC and FI＇IR to make sure the transformation of the intermediums with grinding time, and the results show that the macromole- cule still transforms into micromolecule when the dechlorination rate does not change obviously.