Photodegradation kinetics of o-nitroaniline (ONA), m-nitroaniline (MNA), p-nitroaniline (PNA), p-bromoaniline (PBrA) and o-chloroaniline (OCIA) in aqueous suspension of zinc oxide

Abstract

Photodegradation of several aniline derivatives including o-nitroaniline (ONA), m-nitroaniline (MNA), p-nitroaniline (PNA), p-bromoaniline (PBrA) and o-chloroaniline (OClA) have been studied in aqueous solution using zinc oxide. Rate constants spane the range from 6.46×10-3 min-1 to 2.59×10-2 min-1. The slower degradation rate of p-bromoaniline (PBrA), 6.46×10-3 min-1 could be related to oxidation potential of the corresponding aromatic rings. The Langmuir-Hinshelwood (L-H) rate constant kr and adsorption constant, (KA) for all five aniline derivatives are reported.