title: Biodegradation kinetics of surfactants in seawater.
abstract: In this paper, a general kinetic model for degradation processes of surfactants is proposed. The model equation is v = K2S2 + K1S + K0, where v is the substrate consumption rate in the biodegradation process, S is the surfactant concentration in the medium and K2, K1, and K0 are kinetic constants. From this general expression, different simplified equations can be obtained (where K0 = 0; K2 and K0 = 0; K2 = 0; K2 and K1 = 0), which are representative of the process for different operating conditions. This model was tested by measuring the degradation of two different surfactants (Sodium dodecyl benzene sulfonate, LAS; and Sodium dodecyl sulfate, DSNa) under two different temperatures (5 and 20 degrees C). Values predicted by the model are close to experimental data obtained.
authors.affiliation: Dept. of Chemical Engineering, Food Technology and Environmental Technology, Faculty of Sea Science, University of Cádiz, Puerto Real, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Quiroga
authors.forename: J A
authors.initials: JA
authors.lastname: Perales
authors.forename: L I
authors.initials: LI
authors.lastname: Romero
authors.forename: D
authors.initials: D
authors.lastname: Sales
mesh_terms: D001557:Benzenesulfonates / Q000378:metabolism*; D001673:Biodegradation, Environmental; D007700:Kinetics; D008432:Mathematical Computing; D008954:Models, Biological; D015203:Reproducibility of Results; D012623:Seawater / Q000382:microbiology*; D012967:Sodium Dodecyl Sulfate / Q000378:metabolism*; D013501:Surface-Active Agents / Q000378:metabolism*; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D001557:Benzenesulfonates; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; D012967:Sodium Dodecyl Sulfate; C001114:dodecylbenzenesulfonic acid