Enzymatic Reduction of 2,4,6-Trinitrotoluene and Related Nitroarenes: Kinetics Linked to One-Electron Redox Potentials
作者:R. Guy Riefler、Barth F. Smets
DOI:10.1021/es991422f
日期:2000.9.1
contaminant. Although the reduction of nitro groups in TNT and related nitroarenes has been extensively investigated, few researchers have studied the link between reduction rates and the electrochemical properties of these compounds. In this work, the standard one-electron redox potentials at pH 7 (E1°‘) for six important nitroarenes have been measured by pulse radiolysis. The internally consistent
在军事基地和军火工厂,2,4,6-三硝基甲苯 (TNT) 是一种常见的土壤和地下水污染物。尽管已经广泛研究了 TNT 和相关硝基芳烃中硝基的还原,但很少有研究人员研究还原率与这些化合物的电化学性质之间的联系。在这项工作中,通过脉冲辐解测量了六种重要硝基芳烃在 pH 7 (E1°') 下的标准单电子氧化还原电位。内部一致的值为 TNT -0.253 V,2-氨基-4,6-二硝基甲苯 -0.417 V,4-氨基-2,6-二硝基甲苯 -0.449 V,2,4-二硝基甲苯 -0.397 V,- 2,6-二硝基甲苯为 0.402 V,2,4-二氨基-6-硝基甲苯为 -0.502 V。使用细菌硝基还原酶 NAD(P)H 研究了这些硝基芳烃的还原动力学:使用 NADH·H+ 作为共底物的 FMN 氧化还原酶。在 E1°' 值和五种硝基芳烃的酶促还原率之间观察到对数线性关系,表明 ...