采用亚临界水热反应去除高浓度制药废水中的氯霉素（CAP），探讨了不同温度和时间下亚临界水热反应中CAP的去除效果和降解机理。研究结果表明，CAP在亚临界水热反应中可被有效降解，CAP的去除率随着温度升高和时间延长而增大。在240℃下反应30 min后，CAP的去除率可达到96%。TOC只在一定程度上降低，说明CAP被部分矿化，以其他有机物形式存在于反应液中。根据产物鉴定结果推测，CAP在亚临界水热反应中，C—Cl键会发生断裂转化为Cl^-；亚氨基上的2个C—N键相继断裂生成NH₄⁺；位于苯环外的C—C键会发生断裂最终形成硝基苯。

Subcritical hydrothermal reaction is utilized to remove chloramphenicol (CAP) in high-concentration pharmaceutical wastewater.The removal effect and degradation mechanism of CAP in subcritical hydrothermal reaction at different temperature and time are explored.Studies show that CAP can be effectively degraded in a subcritical hydrothermal reaction, and the removal rate of CAP increases with higher temperature and longer time.The removal rate of CAP can reach 96% after the reaction has performed at 240℃ for 30 min.TOC has only been reduced to a certain extent, indicating that CAP has been partially mineralized and exists in the reaction liquid in the form of other organic matters.According to the product identification results, it is speculated that during the subcritical hydrothermal reaction, C-Cl bond of CAP will be broken to convert into Cl^-;two C-N bonds on the imino group of CAP will be broken successively to generate NH₄⁺;the C-C located outside the benzene ring of CAP bond will break to form nitrobenzene eventually.

魏煜航(1995-),男,硕士研究生,研究方向为环境监测,549567877@qq.com。