naa a22 4500 510752276 CHVBK 20180411083109.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-013-1447-y doi (NATIONALLICENCE)springer-10.1007/s11270-013-1447-y Immobilization of Co and Ni in Mining-Impacted Soils Using Phosphate Amendments [Elektronische Daten] [Silvano Mignardi, Alessia Corami, Vincenzo Ferrini] Synthetic hydroxyapatite (HA) and natural phosphate rock (PR) were applied to heavy metal-contaminated soils from sulfide mine areas in Sardinia and Tuscany (Italy). The application of phosphate amendments to the polluted mine waste soils reduced water-soluble concentrations of Co and Ni by about 99%. In general, phosphate treatment was slightly more effective in reducing water solubility of Co and Ni in the Sardinian soils than in the Tuscan ones. This result suggests that the mineralogical composition of the mine waste soils may impact the effectiveness of metal immobilization. The formation of complexes of the heavy metals on the surface of phosphate grains and partial dissolution of the amendments and precipitation of heavy metal-containing phosphates are the dominant immobilization mechanisms. Between the phosphate amendments, PR was slightly less effective than HA in immobilizing Co and Ni. This result could be attributed to PR inability to provide soluble phosphate. Although with lower effectiveness, the use of PR to immobilize heavy metals from contaminated soils may reduce the risk of phosphate-induced eutrophication due to the application of amendments with highly soluble phosphate. Springer Science+Business Media Dordrecht, 2013 Heavy metals nationallicence Immobilization nationallicence Mine waste soils nationallicence Phosphate treatment nationallicence Mignardi Silvano Department of Earth Sciences, Sapienza University, P.le A. Moro 5, 00185, Rome, Italy aut Corami Alessia Department of Earth Sciences, Sapienza University, P.le A. Moro 5, 00185, Rome, Italy aut Ferrini Vincenzo Department of Earth Sciences, Sapienza University, P.le A. Moro 5, 00185, Rome, Italy aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-10 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1447-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1447-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mignardi Silvano Department of Earth Sciences, Sapienza University, P.le A. Moro 5, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Corami Alessia Department of Earth Sciences, Sapienza University, P.le A. Moro 5, 00185, Rome, Italy aut NATIONALLICENCE 700 1- Ferrini Vincenzo Department of Earth Sciences, Sapienza University, P.le A. Moro 5, 00185, Rome, Italy aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-10 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer