title: Olive oil mill wastewater for remediation of slag contaminated soil.
abstract: Two olive mill wastewaters (OMW) samples, OMWa and OMWb, containing different polyphenolic loads were used for decontaminating an unauthorized dump site in the Campania region, south Italy. In a bench-scale experiment, OMWa at pH 6.0 (OMWapH6.0) and 4.7 (OMWapH4.7), OMWb at pH 4.7 (OMWbpH4.7) and OMWa free of the polyphenolic moiety polyphenol-free OMWa (PF-OMWa) were added to the soil for a 96 h contact time. At 96 h, OMWapH4.7 was more effective than OMWapH6.0, with Cd, Cu, Pb and Zn removal percentages of 30.7-68.1. Cd and Pb levels were 6.0 and 915 mg kg(-1), respectively, decreasing below the regulatory limits for industrial and commercial areas (15.0 and 1 × 10(3) mg kg(-1), respectively). A threefold decrease in Zn levels was also observed from 13.5 × 10(3) to 4.3 × 10(3) mg kg(-1). The metal removal efficiency of PF-OMWa dropped from 30.7 % to 15.6 % for Cd and from 37.9 % to 1.3 % for Pb. OMWbpH4.7 at 96 h was more efficient than OMWapH4.7, with mean removal percentages of 32.5 versus 7.8, respectively.
authors.affiliation: Department of Chemical Sciences, University of Naples Federico II, Complesso Universitario Montesantangelo, Via Cintia, 80126, Naples, Italy.
authors.forename: Luciano
authors.initials: L
authors.lastname: Ferrara
authors.forename: Lucia
authors.initials: L
authors.lastname: Panzella
authors.forename: Alessandra
authors.initials: A
authors.lastname: Napolitano
authors.forename: Italo
authors.initials: I
authors.lastname: Giudicianni
authors.forename: Marco
authors.initials: M
authors.lastname: d'Ischia
authors.forename: Michele
authors.initials: M
authors.lastname: Arienzo
mesh_terms: D052918:Environmental Restoration and Remediation / Q000379:methods; D007220:Industrial Waste / Q000032:analysis* / Q000517:prevention & control; D007558:Italy; D000069463:Olive Oil; D010938:Plant Oils; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis* / Q000706:statistics & numerical data; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007220:Industrial Waste; D000069463:Olive Oil; D010938:Plant Oils; D012987:Soil; D012989:Soil Pollutants; D062065:Wastewater; D014874:Water Pollutants, Chemical