@article{svenson_jameel_chang_kadla_2006, title={Inorganic reactions in chlorine dioxide bleaching of softwood kraft pulp}, volume={26}, ISSN={["0277-3813"]}, DOI={10.1080/02773810601023255}, abstractNote={Abstract A softwood kraft pulp (27 kappa) was bleached with chlorine dioxide to various end pH values. The formation of chlorite, chlorate, and chloride was measured to quantify the amount of chlorine dioxide wasted as a function of pH during a Do (pre‐bleaching) stage. Chlorate formation increased with a decrease in final pH. Conversely, residual chlorite increased with an increase in the final pH. After 120 min of bleaching the total residual chlorite and chlorate showed that no substantial increase in residual oxidant occurs when bleaching to an end pH below 3.4. As a result, the brightness and permanganate numbers for low pH chlorine dioxide bleached pulps did not differ when bleaching to an end pH between 3.4 and 1.8. However, decreasing the pH below 3.4 did result in increased organic chloride formation. The results are contrary to previous studies where the maximum bleaching efficiency for a D1 stage was reported to occur when the end pH was between 3 and 4.}, number={3}, journal={JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY}, author={Svenson, Douglas R. and Jameel, Hasan and Chang, Hou-min and Kadla, John F.}, year={2006}, pages={201–213} } @article{svenson_chang_jameel_kadla_2005, title={The role of non-phenolic lignin in chlorate-forming reactions during chlorine dioxide bleaching of softwood kraft pulp}, volume={59}, ISSN={["1437-434X"]}, DOI={10.1515/HF.2005.017}, abstractNote={Abstract}, number={2}, journal={HOLZFORSCHUNG}, author={Svenson, DR and Chang, HM and Jameel, H and Kadla, JF}, year={2005}, pages={110–115} } @article{svenson_kadla_chang_jameel_2002, title={Effect of pH on the inorganic species involved in a chlorine dioxide reaction system}, volume={41}, DOI={10.1021/ie020191}, number={24}, journal={Industrial & Engineering Chemistry Research}, author={Svenson, D. R. and Kadla, J. F. and Chang, H. M. and Jameel, H.}, year={2002}, pages={5927–5933} } @article{svenson_kadla_chang_jameel_2002, title={Effect of pH on the mechanism of OClO center dot oxidation of aromatic compounds}, volume={80}, ISSN={["0008-4042"]}, DOI={10.1139/V02-089}, abstractNote={ Contrary to previous reports, the reaction mechanism of chlorine dioxide (OClO·) with benzyl alcohols involves both radical cation and benzyl radical mechanisms dependent on pH. The primary reaction product between OClO· and 1-(3,4-dimethoxy-phenyl) ethanol at pH 8 is 3,4-dimethoxyacetophenone. At pH 4 no acetophenone was observed; the majority of the degradation products were chlorinated and aromatic ring-oxidized compounds. A primary kinetic isotope effect (kH/kD = 2.05) was observed in the reaction of OClO· with 1-(3,4-dimethoxy-phenyl)-(1-2H) ethanol at pH 8, but was absent at pH 4 (kH/kD [Formula: see text] 1). Similarly, the corresponding methyl ether (4-(1-methoxy)ethyl-1,2-dimethoxybenzene) was substantially less reactive at pH > 6. On the basis of these results, competing pH-dependent reaction mechanisms have been proposed, where at high pH OClO· reacts with benzyl alcohols via a OClO·–benzyl alcohol complex.Key words: chlorine dioxide, mechanism, kinetic isotope effect, aromatic radical cation, benzyl radical. }, number={7}, journal={CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE}, author={Svenson, D and Kadla, JF and Chang, HM and Jameel, H}, year={2002}, month={Jul}, pages={761–766} }