Kinetic models for volatile chlorinated hydrocarbons removal by zero-valent iron.
Kinetic models for removal of trichloroethylene, trichloromethane and tetrachloroethylene from water by zero-valent iron were tested. The dehalogenation reactions were modelled by first-order and power law models, pseudo-stationary models with a controlling surface reaction rate and non-stationary models without the assumption of rate controlling step. Regression analysis proved, that the first-order kinetic is not suitable for the modelling of chlorinated hydrocarbons dechlorination. On the other hand, power law models, Langmuir-Hinshelwood analogy models and general models of heterogeneous reactions are reliable for the kinetic description of dechlorination. In spite of an empirical or semi-empirical character, the power law models and models of controlling surface reaction rate can be recommended for the regression analysis owing to the their simple regression parameters interpretation.
Janda
Václav
V
Department of Water Technology and Environmental Engineering, Institute of Chemical Technology--Prague, Technická 5, CZ-166 28 Prague 6, Czech Republic. vaclav.janda@vscht.cz
Vasek
Petr
P
Bizova
Jana
J
Belohlav
Zdenek
Z
D006843:Hydrocarbons, Chlorinated / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D012044:Regression Analysis; D018508:Water Purification / Q000379:methods*
D006843:Hydrocarbons, Chlorinated; D007501:Iron