火炸药学报Issue(6)：51-55,60,6.DOI:10.14077/j.issn.1007-7812.2015.06.010
球形红细菌降解 RDX 的动力学及其机理研究
Study on Degradation Kinetics and Mechanism of Explosive Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)by Rhodobacter Sphaeroides
摘要
Abstract
To explore the degradation kinetics and mechanism of explosive hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)by Rhodobacter sphaeroides,the relationship between the growth of Rhodobacter sphaeroides and RDX degradation was studied,and the fitting analysis of the degradation kinetic equation of RDX was performed. The intermediates of RDX metabolized by the strain were analyzed by gas chromatograph-mass spectrometer (GC-MS),and the possible pathway of RDX degradation was deduced.The results show that the RDX degradation by the strain is in accordance with the first-order kinetic model for RDX with initial mass concentration of 2.5 -30 mg/L.Cultivating for 4 d, two intermediates hexahydro-1-nitroso-3,5-dinitro-1,3,5-triazine (MNX ) and methylenedinitramine(MEDINA)were detected by GC-MS,and the ratios of mass to charge(m/z)of its parention were 207 and 135,respectively.The possible degradation pathway is that RDX is first reduced to MNX and the latter undergoes further reduction to finally produce MEDINA,which was finally degraded to smaller molecular compounds,considering that nitro reductase is an important enzyme in the degradation process.关键词
球形红细菌/光合细菌/黑索今/RDX/降解动力学/降解机理/MNX/MEDINAKey words
Rhodobacter sphaeroides/photosynthetic bacteria/hexahydro-1,3,5-trinitro-1,3,5-triazine/RDX/degradation kinetics/degradation mechanism/MNX/MEDINA分类
军事科技引用本文复制引用
白红娟,王珊,柴春镜,牛伟平..球形红细菌降解 RDX 的动力学及其机理研究[J].火炸药学报,2015,(6):51-55,60,6.基金项目
山西省科技攻关资助项目（20080311027-1）；中北大学自然科学基金项目资助 （）
