Abstract
In this study Cr(tot), Cr(VI), major and trace elements were determined in groundwater of northern sector of the Pollino Massif (southern Italy). The investigated area is characterized by ophiolitic rocks consisting of metabasites, shales and calcschists and fractured serpentinites. Two main hydro-facies were observed, reflecting low temperature water–rock interaction. The Mg-HCO3 hydrofacies is due to the weathering of serpentinites, Ca-HCO3 groundwaters are linked to the interaction with calcschist and metabasites. High Cr(VI) concentrations were detected, exceeding the maximum admissible concentrations by Italian regulation, due to the release of Cr(III) from ophiolitic rocks into water and its oxidation to the hexavalent state. Remediation tests were carried out using two synthetized nanomaterials, Fe(0) and magnetite, characterized by a mean size lower than 50 nm. The experiments were conducted at fixed nanoparticles/Cr(VI) molar ratio and according to previous studies. In addition, the kinetic data were interpreted with a suitable mathematical model.
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Acknowledgements
These results are part of a larger project (entitled CrITERIA-T3ERA-00004) funded by ERANETMED Joint Call. We are grateful to Dr. M. Dichicco and Dr. S. Laurita for assistance during the samples collection and Prof. A. Argyraki for the constructive comments and suggestions, which helped us to improve this paper.
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Paternoster, M., Rizzo, G., Sinisi, R. et al. Natural Hexavalent Chromium in the Pollino Massif Groundwater (Southern Apennines, Italy): Occurrence, Geochemistry and Preliminary Remediation Tests by Means of Innovative Adsorbent Nanomaterials. Bull Environ Contam Toxicol 106, 421–427 (2021). https://doi.org/10.1007/s00128-020-02898-7
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DOI: https://doi.org/10.1007/s00128-020-02898-7