@inbook{c67e9a6699514404b84d806a49918a71,
title = "Multifactor Statistical Analysis of H2O2-Enhanced Photodegradation of Nicotine and Phosphamidon",
abstract = "Direct and indirect photolysis (lambda = 254 nm) of aqueous nicotine and phosphamidon were studied. A central composite design was used to explore the effects of initial [H2O2] (0-10 mM), pH (2.8-11.2), and ionic strength (I-c = 0.02-0.71 M) on the rate constants of nicotine and phosphamidon separately dissolved in a surface water surrogate matrix. Five levels of each factor were included in the design. For nicotine, the fastest predicted photochemical oxidation rate constant (k = 0.43 min(-1)) occurred under the following conditions: pH = 7.5, [H2O2] = 7.5 mM, and I-c = 0.02 M. This rate constant predicts that 90% of the nicotine will react within 5.4 min under these conditions. In general, the photochemical oxidation of nicotine is more rapid at lower ionic strength and near-neutral pH values. For phosphamidon, the fastest predicted oxidation rate constant (k = 0.65 min(-1)) occurred at a pH of 7.1 and [H2O2] of 5 mM. Under these conditions, 90% of the phosphamidon would react within 3.5 min of treatment. Like nicotine, the photochemical oxidation of phosphamidon is more rapid at near-neutral pH values. Ionic strength has no significant effect on the photochemical oxidation of phosphamidon.",
keywords = "dissolved organic-matter, fenton reaction, hydrogen-peroxide, natural-water, pesticides, photocatalytic degradation, rate constants, surface waters, tio2 suspensions, titanium-dioxide",
author = "Nienow, {A. M.} and Inez Hua and Poyer, {I C} and Bezares-Cruz, {J C} and Jafvert, {Chad T.}",
year = "2009",
doi = "Doi 10.1021/Ie801311f",
language = "English (US)",
isbn = "0888-5885",
series = "Industrial & Engineering Chemistry Research",
pages = "3955--3963",
booktitle = "Industrial & Engineering Chemistry Research",
}