Oh Seok-Young, Chiu Pei C, Kim Byung J, Cha Daniel K
Department of Civil and Environmental Engineering, University of Delaware, DE 19716, USA.
Water Res. 2005 Dec;39(20):5027-32. doi: 10.1016/j.watres.2005.10.004.
Hexahydro-1,3,5-trinitro-1,3,5-triazine (C3H6N3(NO2)3, royal demolition explosive or RDX) is a common nitramine explosive and one of the major constituents in wastewaters from ammunitions plants. The objective of this study is to investigate zero-valent iron (Fe0) pretreatment for enhancing the biodegradability of recalcitrant RDX. It was hypothesized that iron pretreatment can reductively transform RDX to products that are more amenable to biological treatment processes such as activated sludge. Results of batch and column experiments showed rapid and complete removal of RDX by Fe0 regardless of the buffering capacity. Formaldehyde (HCHO), a major reduction product of RDX, was readily biodegraded by a mixed culture. Respirometric data indicate that iron-treated RDX solution exerted substantially higher biochemical oxygen demand (BOD) than untreated RDX solution. We propose that an integrated iron reduction-activated sludge process may be a feasible option for treating RDX-laden wastewater.
六氢-1,3,5-三硝基-1,3,5-三嗪（C3H6N3(NO2)3，皇家爆破炸药或黑索金）是一种常见的硝胺炸药，也是弹药厂废水中的主要成分之一。本研究的目的是研究零价铁（Fe0）预处理对提高难降解黑索金生物降解性的影响。假设铁预处理可以将黑索金还原转化为更适合生物处理工艺（如活性污泥）的产物。批次实验和柱实验结果表明，无论缓冲能力如何，Fe0都能快速、完全地去除黑索金。黑索金的主要还原产物甲醛（HCHO）很容易被混合培养物生物降解。呼吸测量数据表明，经铁处理的黑索金溶液的生化需氧量（BOD）比未经处理的黑索金溶液高得多。我们认为，铁还原-活性污泥综合工艺可能是处理含黑索金废水的可行选择。
