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INVESTIGATION AND ASSESSMENT FOR AN EFFECTIVE APPROACH TO THE RECLAMATION OF POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) CONTAMINATED SITE: SIN BAGNOLI, ITALY
Guarino, C., D. Zuzolo, M. Marziano, B. Conte, G. Baiamonte, L. Morra, D. Benotti, et al.
Scientific Reports 9:11522(2019)

Native plant species were screened for their potential to remediate PAH-contaminated soil on the Bagnoli brownfield site in southern Italy. Soils contain every PAH congener at concentrations above contamination threshold limits established by Italian environmental legislation for residential/recreational land use. The concentration of 13 high molecular weight PAHs in soil rhizosphere, plant roots, and plant leaves were assessed to evaluate native plant suitability for remediation of the study area. Analysis of soil microorganisms provides important knowledge about bioremediation approach. Alphaproteobacteria, betaproteobacteria, and gammaproteobacterial were the main phyla of bacteria observed in polluted soil. Functional metagenomics showed changes in cioxygenases, iaccase, protocatechuate, and benzoate-degrading enzyme genes. Indolacetic acid production, siderophoresrelsease, exopolysaccharides production, and ammonia production are the key to the selection of the rhizosphere bacterial production. Results indicated that the natural plant-bacteria partnership is a good strategy to remediate the PAH-contaminated soil. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6687822/pdf/41598_2019_Article_48005.pdf



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