title: A variable reaction rate model for chlorine decay in drinking water due to the reaction with dissolved organic matter.
abstract: A second order kinetic model for simulating chlorine decay in bulk water due to the reaction with dissolved organic matter (DOM) was developed. It takes into account the decreasing reactivity of dissolved organic matter using a variable reaction rate coefficient (VRRC) which decreases with an increasing conversion. The concentration of reducing species is surrogated by the maximum chlorine demand. Temperature dependency, respectively, is described by the Arrhenius-relationship. The accuracy and adequacy of the proposed model to describe chlorine decay in bulk water were evaluated and shown for very different waters and different conditions such as water mixing or rechlorination by applying statistical tests. It is thus very well suited for application in water quality modeling for distribution systems.
authors.affiliation: Technische Universität Dresden, Institute of Urban Water Management, Chair of Water Supply Engineering, 01062 Dresden, Germany.
authors.forename: Pei
authors.initials: P
authors.lastname: Hua
authors.affiliation: Technische Universität Dresden, Institute of Urban Water Management, Chair of Water Supply Engineering, 01062 Dresden, Germany.
authors.forename: Ekaterina
authors.initials: E
authors.lastname: Vasyukova
authors.affiliation: Technische Universität Dresden, Institute of Urban Water Management, Chair of Water Supply Engineering, 01062 Dresden, Germany; Norwegian Institute for Water Research (NIVA), 0349 Oslo, Norway. Electronic address: wolfgang.uhl@niva.no.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Uhl
mesh_terms: D002713:Chlorine / Q000032:analysis / Q000737:chemistry*; D060766:Drinking Water / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D054879:Halogenation; D006812:Humic Substances; D007700:Kinetics; D008962:Models, Theoretical; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification; D060753:Water Quality; D014881:Water Supply
chemical_list: D060766:Drinking Water; D006812:Humic Substances; D014874:Water Pollutants, Chemical; D002713:Chlorine
keywords: Chlorine decay model; Drinking water; Rechlorination; Variable reaction rate coefficient; Water mixing