| Text | 471218 2022 10.3390/ijerph19159622 Scopus 2 s2.0 85136343265 hexavalent chromium Enhanced Natural Attenuation of Groundwater Cr VI Pollution Using Electron Donors Yeast Extract vs. Polyhydroxybutyrate Tumolo M.; Volpe A.; Leone N.; Cotugno P.; De Paola D.; Losacco D.; Locaputo V.; de Pinto M.C.; Uricchio V.F.; Ancona V. Water Research Institute, Italian National Research Council IRSA CNR , BA, Bari, 70132, Water Research Institute, Italian National Research Council IRSA CNR , Bari, BA, 70132, Italy, , , Italy; Water Research Institute, Italian National Research Council IRSA CNR , BA, Bari, 70132, Water Research Institute, Italian National Research Council IRSA CNR , Bari, BA, 70132, Italy, , , Italy; Department of Biology, University of Bari, BA, Bari, 70126, Department of Biology, University of Bari, 70126 Bari, BA, Italy, , Italy; Department of Chemistry, University of Bari, BA, Bari, 70126, Department of Chemistry, University of Bari, 70126 Bari, BA, Italy, , Italy; Institute of Biosciences and Bioresources, Italian National Research Council IBBR CNR , BA, Bari, 70126, Institute of Biosciences and Bioresources, Italian National Research Council IBBR CNR , Bari, BA, 70126, Italy, , , Italy; Institute of Biosciences and Bioresources, Italian National Research Council IBBR CNR , BA, Bari, 70126, Institute of Biosciences and Bioresources, Italian National Research Council IBBR CNR , Bari, BA, 70126, Italy, , , Italy Remediation interventions based on the native bacteria s capability to reduce Cr VI represent a valid strategy in terms of economic and environmental sustainability. In this study, a bioremediation test was carried out using viable microcosms set with groundwater and deep soil 4 1 , collected from the saturated zone of an industrial site in Southern Italy that was polluted by 130 µg L of Cr VI . Conditions simulating the potential natural attenuation were compared to the enhanced natural attenuation induced by supplying yeast extract or polyhydroxybutyrate. Sterile controls were set up to study the possible Cr VI abiotic reduction. No pollution attenuation was detected in the unamended viable reactors, whereas yeast extract provided the complete Cr VI removal in 7 days, and polyhydroxybutyrate allowed 70% pollutant removal after 21 days. The incomplete abiotic removal of Cr VI was observed in sterile reactors amended with yeast extract, thus suggesting the essential role of native bacteria in Cr VI remediation. This was in accordance with the results of Pearson s coefficient test, which revealed that Cr VI removal was positively correlated with microbial proliferation n = 0.724 , and also negatively correlated with pH n = 0.646 , dissolved oxygen n = 0.828 and nitrate n = 0.940 . The relationships between the Cr VI removal and other monitored parameters were investigated by principal component analysis, which explained 76.71% of the total variance. 19 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85136343265 origin=inward Articolo in rivista MDPI, 1661 7827 International journal of environmental research and public health Print International journal of environmental research and public health Print Int. j. environ. res. public health Print International journal of environmental research and public health. Print marinatumolo TUMOLO MARINA danielalosacco LOSACCO DANIELA natalialeone LEONE NATALIA angela.volpe VOLPE ANGELA vitofelice.uricchio URICCHIO VITO FELICE vito.locaputo LOCAPUTO VITO valeria.ancona ANCONA VALERIA domenico.depaola DE PAOLA DOMENICO |
