Effect of Humification and Temporal Alterations of Organogenic Waste (Sewage Sludge) Properties on Its Sorption Capacity for Metals
A comparative study of the effect of temporal variability of sewage sludge (SS) composition and alteration of its properties,in particular of humification of organic matter (OM),on sorption capacity and binding strength for metals was carried out on two representative samples of freshly generated (Z-09) and 4.5 years old material not exposed to atmospheric conditions (Z-05).In both SS,functional groups of humic substances responsible for metal binding were identified,although Z-05 appeared to be enriched in new OH,COO and alcohol groups due to humification.Simultaneously,acidification and OM reduction in older SS was also observed.Batch experiments showed high sorption capacity of SS for metals comparable to NOM and its decreasing trend in older material except for Cu and Ni,which could be explained by the antithetic effect of factors resulting from SS temporal alterations and CaCO3 variability.Metals originally occurring in SS were predominantly stably bound onto fractions of high binding strength,while in sorption of new metal loads,binding onto labile fractions of a weaker binding strength prevailed.
Sewage sludge Humic substances Functional groups Composition variability Metal binding
Irena Twardowska Ewa Miszczak Sebastian Stefaniak Philippe Schmitt-Kopplin Mourad Harir
Polish Academy of Sciences,Institute of Environmental Engineering,34,M.Sklodowska-Curie St.,41-819 Z German Research Center for Environmental Heath,Helmholtz Zentrum München,Institut für(O)kologische C
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
309-311
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）