title: Successful removal of p-quinone with chitosan in an aqueous phase in relation to degree of deacetylation.
abstract: Phenol oxidant is successfully removed by using chitosan particles in the aqueous phase. Removal of p-quinone by chitosan from crab shells was investigated kinetically from molecular weight (MW) of chitosan, deacetylation degree (DD) and reaction temperature. The rate constant assuming first-ordered reaction on removal of p-quinone in aqueous phase primarily depended on the MW of chitosan, not on the DD. Quantities of chitosan exceeding 5 x 10(5) MW are able to obtain a sufficiently high rate constant (10(-3) s(-1)). At higher temperatures, higher rate constants were obtained in the entire experimental MW and DD. The activation energy obtained was 43.8 kJ x mol(-1).
authors.affiliation: Laboratory of Food Chemical Engineering, Course in Bioresource Utilization Sciences, Graduate School of Bioresource Sciences, Nihon University 1866 Kameino, Fujisawa, Kanagawa-pref., 252-8510 Japan.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Takahashi
authors.forename: Masanao
authors.initials: M
authors.lastname: Imai
authors.forename: Isao
authors.initials: I
authors.lastname: Suzuki
mesh_terms: D000818:Animals; D048271:Chitosan / Q000737:chemistry / Q000302:isolation & purification*; D007700:Kinetics; D008970:Molecular Weight; D008974:Mollusca / Q000737:chemistry*; D016877:Oxidants / Q000302:isolation & purification; D011809:Quinones / Q000737:chemistry / Q000302:isolation & purification*; D013816:Thermodynamics
chemical_list: D016877:Oxidants; D011809:Quinones; D048271:Chitosan