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- W2074270149 abstract "In this work, nanoscale zero-valent iron (NZVI) particles have been used as an immobilisation strategy to reduce Pb and Zn availability and mobility in polluted soils. The application of NZVI to two soil microcosms (MPb and MZn) at a dose of 34 mg g−1 soil efficiently immobilised Pb (25%) and zinc (20%). Exposure to NZVI had little impact on the microbial cellular viability and biological activity in the soils. Three bacterial genes (narG, nirS and gyrA) were used as treatment-related biomarkers. These biomarkers ruled out a broad bactericidal effect on the bulk soil microbial community. A transcriptome analysis of the genes did not reveal any changes in their expression ratios after the NZVI treatment: 1.6 (narG), 0.8 (nirS) and 0.7 (gyrA) in the MPb microcosm and 0.6 (narG), 1.2 (nirS) and 0.5 (gyrA) in the MZn microcosm. However, significant changes in the structure and composition of the soil bacteria population were detected by fluorescence in situ hybridisation. Thus, our results showed that NZVI toxicity could be highly dose and species dependent, and the effective applicability of the proposed molecular approach in assessing the impact of this immobilisation strategy on soil microbial population." @default.
- W2074270149 created "2016-06-24" @default.
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- W2074270149 date "2012-02-01" @default.
- W2074270149 modified "2023-10-16" @default.
- W2074270149 title "Assessing the impact of zero-valent iron (ZVI) nanotechnology on soil microbial structure and functionality: A molecular approach" @default.
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- W2074270149 doi "https://doi.org/10.1016/j.chemosphere.2011.11.041" @default.
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