2022 Cilt 27 Sayı 1

Permanent URI for this collectionhttps://hdl.handle.net/11452/27900

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    Treatment of Pb – naphthalene co – contamination in soils by zero valent iron nanoparticles (NZVI) and bioremediation
    (Bursa Uludağ Üniversitesi, 2022-02-10) Kahraman, Bekir Fatih; Altın, Ahmet
    The co-contamination of soils with heavy metals and organic contaminants is a problem that requires a different and innovative approach to remediate these kinds of sites. The different nature of these two contaminant groups makes the problem complicated. Recently, zero-valent iron nanoparticles (nZVI) application has been integrated with bioremediation to be used for the remediation of halogenated organics. However, the use of this process for the remediation of co-contaminated soils has not been investigated. In this study, nZVI application integrated with bioremediation approaches (bioattenuation and biostimulation) was applied to Pb and naphthalene spiked soils in laboratory-scale reactors. Soil Pb fractions and naphthalene concentrations were monitored for 90 days. The nZVI decreased the mobility and bioavailability of Pb significantly by reducing exchangeable and carbonate bound fractions from 66.2 % to 25.8 – 37.2 % range. The nZVI also caused naphthalene degradation in the range of 38.8 – 58.5 %. Significant biodegradation of naphthalene occurred at samples subjected to nZVI and biostimulation. The highest overall naphthalene degradation (76.7 %) was obtained from the nZVI application which was integrated with biostimulation.