| Abstract | Soil contamination with polychlorinated biphenyls (PCBs) is one the most relevant environmental problem in the SIN (Site of National Interest) of Taranto (Apulia Region, Southern Italy) and the surrounding area. Evaluation of PCB contents and their spatial distribution is an essential pre-requisite for soil remediation. Conventional laboratory analyses, although useful and irreplaceable for a precise and detailed evaluation of these contaminants, are costly and time-consuming, thus not very suitable for investigation over large areas. Then, there is a need to develop/validate alternative, rapid and cost-effective techniques, to use as substitutive of integrative to conventional analytical approaches. In this study, the usefulness of soil colour, based on spectrometric measurements, coupled with regression analysis, was assessed. Until now, never an analogous investigation has been realised. Twenty-eight soil samples, previously collected within an area (the ex-MATRA) highly contaminated by the disposal of oil used as dielectric fluid, composed by a mixture of PCB congeners, were used in the investigation. Colour coordinates in different colour systems were calculated from spectroradiometric measurements over the soil samples. Eighteen PCB congeners (i.e. 12 dioxin-like PCBs and six non-dioxin-like "indicator" PCBs), their sum (PCBs ) and the extractable organic halogen content (EOX)--which is an expression of the total content of halogen in organochlorine compounds, including the PCBs--were determined through conventional laboratory analysis. Simple linear regression analysis was carried out to predict the values of PCBs and EOX on the basis of colour variables. Excellent predictive models (R > 0.80) for PCBs and EOX, as well as for some of the individual PCB congener, resulted from the regression analysis. Thus, spectroscopic determination of soil colour can be considered as a promising tool for a rapid screening of PCBs in contaminated soils. [Figure not available: see fulltext.]. |
| Text | 422476 2019 10.1007/s11270 019 4103 3 Scopus 2 s2.0 85062231337 ISI Web of Science WOS 000459991400003 Spectrometric colour measurement Polychlorinated biphenyls Regression analysis Using Spectrometric Colour Measurement for the Prediction of Soil PCBs in a Contaminated Site of Southern Italy Ancona V.; Leone N.; Galeone C.; Bagnuolo G.; Uricchio V.F.; Leone A.P. Istituto di Ricerca Sulle Acque del Consiglio Nazionale delle Ricerche, V.le F. De Blasio 5, Bari BA , 70132, , , Italy; Istituto di Ricerca Sulle Acque del Consiglio Nazionale delle Ricerche, V.le F. De Blasio 5, Bari BA , 70132, , , Italy; Dipartimento di Biologia, Universita degli studi di Bari Aldo Moro, Via E. Orabona 4, Bari BA , 70126, , Italy; Istituto per i Sistemi Agricoli e Forestali del Mediterraneo del Consiglio Nazionale delle Ricerche, Via Patacca 85 Ercolano, Naples, 80056, , Italy Soil contamination with polychlorinated biphenyls PCBs is one the most relevant environmental problem in the SIN Site of National Interest of Taranto Apulia Region, Southern Italy and the surrounding area. Evaluation of PCB contents and their spatial distribution is an essential pre requisite for soil remediation. Conventional laboratory analyses, although useful and irreplaceable for a precise and detailed evaluation of these contaminants, are costly and time consuming, thus not very suitable for investigation over large areas. Then, there is a need to develop/validate alternative, rapid and cost effective techniques, to use as substitutive of integrative to conventional analytical approaches. In this study, the usefulness of soil colour, based on spectrometric measurements, coupled with regression analysis, was assessed. Until now, never an analogous investigation has been realised. Twenty eight soil samples, previously collected within an area the ex MATRA highly contaminated by the disposal of oil used as dielectric fluid, composed by a mixture of PCB congeners, were used in the investigation. Colour coordinates in different colour systems were calculated from spectroradiometric measurements over the soil samples. Eighteen PCB congeners i.e. 12 dioxin like PCBs and six non dioxin like indicator PCBs , their sum PCBs and the extractable organic halogen content EOX which is an expression of the total content of halogen in organochlorine compounds, including the PCBs were determined through conventional laboratory analysis. Simple linear regression analysis was carried out to predict the values of PCBs and EOX on the basis of colour variables. Excellent predictive models R > 0.80 for PCBs and EOX, as well as for some of the individual PCB congener, resulted from the regression analysis. Thus, spectroscopic determination of soil colour can be considered as a promising tool for a rapid screening of PCBs in contaminated soils. Figure not available see fulltext. . 230 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85062231337 origin=inward Using Spectrometric Colour Measurement for the Prediction of Soil PCBs in a Contaminated Site of Southern Italy UsingSpectrometricColourMeasur.pdf Articolo in rivista Kluwer Academic Publishers 0049 6979 Water, air and soil pollution Print Water, air and soil pollution Print Water, air and soil pollution. Print Water air soil pollut. Print Water, air soil pollution Print cirogaleone GALEONE CIRO natalialeone LEONE NATALIA vitofelice.uricchio URICCHIO VITO FELICE valeria.ancona ANCONA VALERIA antoniopasquale.leone LEONE ANTONIO PASQUALE giuseppe.bagnuolo BAGNUOLO GIUSEPPE |
