title: The influences of dissolved organic matter and surfactant on the desorption of Cu and Zn from road-deposited sediment.
abstract: This study showcases the desorption behaviours of copper (Cu) and zinc (Zn) in road-deposited sediment (RDS). Batch tests were conducted to investigate the influences of rainwater, major wastewater constituents of dissolved organic matter (DOM) and surfactant on the metals leaching from RDS. Results show that the rainwater solutions considerably enhanced the total amounts of Cu (319 ± 46% of the total leaching amount by blank solutions) and Zn (617 ± 130%) released from RDS compared with blank solutions. DOM enhanced the leaching of Cu from RDS at a neutral pH. By contrast, DOM had an adverse effect on the mobilization of Zn. In the absence of DOM, a higher concentration of sodium dodecyl sulfonate (SDS) slightly increased the release of Cu from RDS than a lower concentration of SDS. However, the existence of SDS suppressed the release of Zn from RDS.
authors.affiliation: Institute of Urban Water Management, Technische Universität Dresden, 01062 Dresden, Germany. Electronic address: jin.zhang@hotmail.com.
authors.forename: Jin
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Chair of Water Supply Engineering, Institute of Urban Water Management, Technische Universität Dresden, 01062 Dresden, Germany. Electronic address: pei.hua@hotmail.com.
authors.forename: Pei
authors.initials: P
authors.lastname: Hua
authors.affiliation: Institute of Urban Water Management, Technische Universität Dresden, 01062 Dresden, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Krebs
mesh_terms: D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D019015:Geologic Sediments / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009930:Organic Chemicals / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
chemical_list: D009930:Organic Chemicals; D013501:Surface-Active Agents; D003300:Copper; D015032:Zinc
keywords: Desorption; Dissolved organic matter; Heavy metals; Integrated stormwater management; Road-deposited sediment; Surfactant