title: Sorption media for stormwater treatment--a laboratory evaluation of five low-cost media for their ability to remove metals and phosphorus from artificial stormwater.
abstract: Five sorption materials were studied with a focus on polishing pretreated stormwater: crushed limestone, shell-sand, zeolite, and two granulates of olivine. These materials are commercially available at comparatively low cost and have been subjected to a minimum of modification from their natural states. The sorbents were tested for phosphorus, arsenic, cadmium, chromium, copper, nickel, lead, and zinc at concentration and conditions relevant for typical stormwater. The materials were tested for sorption capacity and kinetics. Desorption was tested under neutral and alkaline conditions and in the presence of chloride. For most sorbent/sorbate combinations, significant sorption occurred within the first minutes of contact between sorbent and sorbate. Treatment to the low microgram per liter range could be achieved by contact times of less than 1 hour. The study indicated that sorption filters can be designed for long life expectancy at comparatively low cost by applying the materials tested.
authors.affiliation: Aalborg University, Department of Civil Engineering, Sohngaard-sholmsvej 57, 9000 Aalborg, Denmark.
authors.forename: Tove
authors.initials: T
authors.lastname: Wium-Andersen
authors.forename: Asbjørn H
authors.initials: AH
authors.lastname: Nielsen
authors.forename: Thorkild
authors.initials: T
authors.lastname: Hvitved-Jacobsen
authors.forename: Niels Krogh
authors.initials: NK
authors.lastname: Kristensen
authors.forename: Hans
authors.initials: H
authors.lastname: Brix
authors.forename: Carlos
authors.initials: C
authors.lastname: Arias
authors.forename: Jes
authors.initials: J
authors.lastname: Vollertsen
mesh_terms: D000327:Adsorption; D008670:Metals / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D011891:Rain; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation* / Q000379:methods
chemical_list: D008670:Metals; D014874:Water Pollutants, Chemical; D010758:Phosphorus