title: Differences in the mobility of Cd, Cu, Pb and Zn during composting of two types of household bio-waste collected in four seasons.
abstract: The objective of this study was to evaluate the mobility of Cd, Cu, Pb and Zn during 3 different compost aeration rates of household bio-waste, originating in urban settlement (U-bio-waste) and family house buildings (F-bio-waste). The first two weeks, when the thermophilic composting phase became, the highest decline of exchangeable content was recorded. After 12 weeks of composting, lower exchangeable content was found in the case of U-bio-waste composts than F-bio-waste composts, despite higher loss of fresh mass. The order of fractions in both final composts was as follows: residual>oxidizable>reducible>exchangeable. The exchangeable portion of total content in final composts decreased in this order: Zn (17%), Cd (11%), Pb (4%) and Cu (3%). Regarding the low exchangeable content of heavy metals and high-quality organic matter, these types of composts could be used not only as fertilizer, but for remediation of metals contaminated land.
authors.affiliation: Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamycka 129, Prague 165 21, Czech Republic. Electronic address: hanc@af.czu.cz.
authors.forename: Ales
authors.initials: A
authors.lastname: Hanc
authors.affiliation: Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamycka 129, Prague 165 21, Czech Republic.
authors.forename: Jirina
authors.initials: J
authors.lastname: Szakova
authors.affiliation: Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamycka 129, Prague 165 21, Czech Republic.
authors.forename: Pavla
authors.initials: P
authors.lastname: Ochecova
mesh_terms: D018533:Biomass; D002244:Carbon / Q000032:analysis; D005591:Chemical Fractionation; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis; D012037:Refuse Disposal; D012621:Seasons; D012987:Soil; D018709:Statistics, Nonparametric
chemical_list: D019216:Metals, Heavy; D012987:Soil; D002244:Carbon; D009584:Nitrogen
keywords: Composting; Heavy metal; Household bio-waste; Mobility; Season