title: Mass-balance estimation of heavy metals and selected anions at a landfill receiving MSWI bottom ash and mixed construction wastes.
abstract: An estimation of the heavy metal and anion mass-balance was made for municipal solid waste incinerator bottom ash deposited at a construction and industrial waste landfill. The mass-balance was found by comparing the content of metals and anions in the landfill leachate to the metal and anion content in the deposited bottom ash. The discharge of heavy metals ranged from 0.001% for Pb to 0.55% for Cr, which is approximately at the same level as in regular municipal solid waste (MSW) landfills. Landfilled organic material and silicates from construction waste might have contributed to the retention of metals. Chloride, and to a lesser extent sulphate, appeared to be readily released from the landfill. It was estimated that a mass corresponding to 80% of the Cl- and 18% of the SO(4)2- in the bottom ash was discharged annually. Low retention, especially of chloride, may lead to a rapid decline in the discharge of this ion in the future when the landfilling of bottom ash is discontinued.
authors.affiliation: The Department of Plant and Environmental Sciences, University of Life Sciences, N-1432 Aas, Norway. joar.oygard@umb.no
authors.forename: Joar Karsten
authors.initials: JK
authors.lastname: Oygard
authors.forename: Elin
authors.initials: E
authors.lastname: Gjengedal
authors.forename: Amund
authors.initials: A
authors.lastname: Måge
mesh_terms: D000838:Anions / Q000737:chemistry*; D003252:Construction Materials; D017745:Incineration; D009111:Local Government; D019216:Metals, Heavy / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*
chemical_list: D000838:Anions; D019216:Metals, Heavy