title: Viability of organic wastes and biochars as amendments for the remediation of heavy metal-contaminated soils.
abstract: Composts derived from municipal (MOW and MSW) and domestic wastes (DOM), wastes from the olive oil industry (OWH and OP), green waste (GW), and biochars (BF and BS) were investigated to test their viability for remediating metal-contaminated soils. In addition to common analyses, the characterisation included structural analyses (FTIR and (13)C NMR), determination of the acid neutralisation capacity (ANC) and the construction of sorption isotherms for target metals (Pb, Zn, Cd, Ni and Cu). MOW and GW had the highest ANC values (4280 and 7100 meq kg(-1), respectively), and MOW, GW, DOM, BF and BS exhibited the highest solid-liquid distribution coefficients (Kd) with maximum values in the 10(4) L kg(-1) range. Sorption isotherms were fitted using linear and Freundlich models for better comparison of the sorption capacities of the materials. Based on their basic pH, high ANC and high sorption capacity, MOW, GW and biochars are the most promising materials.
authors.affiliation: Departament de Química Analítica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Venegas
authors.affiliation: Departament de Química Analítica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Rigol
authors.affiliation: Departament de Química Analítica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. Electronic address: miquel.vidal@ub.edu.
authors.forename: M
authors.initials: M
authors.lastname: Vidal
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000378:metabolism*; D052918:Environmental Restoration and Remediation; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants; C540010:biochar; D002606:Charcoal
keywords: Biochars; Heavy metals; Immobilisation; Organic materials; Sorption isotherms