An Chunjiang, Shi Yarong, He Yanling, Huang Guohe, Liu Yonghong, Yang Shucheng
Water Environ Res. 2017 May 1;89(5):472-479. doi: 10.2175/106143017X14839994523622.
RDX and HMX are widely used energetic materials and they are recognized as environmental contaminants at numerous locations. The present study investigated the biotransformation of RDX and HMX by anaerobic granular sludge under sulfate- and nitrate-enriched conditions. The results showed that RDX and HMX could be transformed by anaerobic granular sludge when nitrate was present. However, the biotransformation of RDX and HMX was negatively influenced, especially with high nitrate concentrations. Sulfate-enriched conditions were more favorable for the removal of ammunition compounds by anaerobic granular sludge than nitrate-enriched conditions. The removal of RDX and HMX under both nitrate- and sulfate-enriched conditions was facilitated by the use of glucose as additional substrate. This knowledge may help identify factors required for rapid removal of RDX and HMX in high-rate bioreactors. These results can also be applied to devise an appropriate and practical biological treatment strategy for explosive contaminated wastewater.
黑索今（RDX）和奥克托今（HMX）是广泛使用的含能材料，在许多地方它们被认定为环境污染物。本研究调查了在富含硫酸盐和硝酸盐的条件下，厌氧颗粒污泥对RDX和HMX的生物转化作用。结果表明，当存在硝酸盐时，厌氧颗粒污泥能够转化RDX和HMX。然而，RDX和HMX的生物转化受到负面影响，尤其是在高硝酸盐浓度下。与富含硝酸盐的条件相比，富含硫酸盐的条件更有利于厌氧颗粒污泥去除弹药化合物。在富含硝酸盐和硫酸盐的条件下，使用葡萄糖作为额外底物有助于去除RDX和HMX。这些知识可能有助于确定在高速生物反应器中快速去除RDX和HMX所需的因素。这些结果还可应用于设计针对爆炸物污染废水的合适且实用的生物处理策略。
