2,4,6-Trinitrotoluene reduction kinetics in aqueous solution using nanoscale zero-valent iron.
The reduction of 2,4,6-trinitrotoluene (TNT) in aqueous solution using nanoscale zero-valent iron (nZVI) was investigated. The results showed that the pseudo-first order reaction law fit the reduction of TNT. The measured apparent rate constant (K(obs)) of TNT on nZVI (0.761 h(-1)) was 7.8-fold than on conventional iron powders (0.0979 h(-1)) at 303 K. The apparent activation energy (E(a)) of nZVI reducing TNT was found to be 24.85 KJ/mol, which was decreased by 60% compared to employing conventional iron powders. The apparent rate constant of TNT reduction on nZVI also can be improved by an increase in nZVI concentration, reaction temperature and a decrease of pH.
Zhang
Xin
X
School of Chemistry and Materials Science, Fujian Normal University, Fuzhou , Fujian Province, China.
Lin
Yu-man
YM
Chen
Zu-liang
ZL
D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D019163:Reducing Agents / Q000737:chemistry; D012996:Solutions; D013696:Temperature; D013816:Thermodynamics; D014303:Trinitrotoluene / Q000737:chemistry*
D019163:Reducing Agents; D012996:Solutions; D014303:Trinitrotoluene; D007501:Iron