Impact of carbon nanomaterials on microbial activity in soil |
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| Institution: | 1. Department of Chemistry, International Hellenic University, Kavala, Greece;2. Division of Chemical Technology and Industrial Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece;1. Faculty of Technology and Metallurgy, University Ss. Cyril and Methodius, Skopje, Macedonia;2. Department of Biology, Science and Humanities College, Shaqra University, Alquwayiyah, Saudi Arabia;1. Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;2. Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, United States;3. Instituto de Recursos Naturales y Agrobiologia de Sevilla (IRNAS-CSIC), Spain;4. Department of Civil and Environmental Engineering, University of Nevada, Reno, NV 89557, United States;1. Institute of Plant Genetics, Breeding and Biotechnology, Faculty of Agrobioengineering, University of Life Sciences, Lublin, Poland;2. Department of Environmental Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University, Lublin, Poland;3. Department of Analytical Chemistry and Instrumental Analysis, Faculty of Chemistry, Maria Curie-Sklodowska University, Lublin, Poland;4. Institute of Soil Science, Engineering and Environmental Management, Faculty of Agrobioengineering, University of Life Sciences, Lublin, Poland;5. Department of Environmental Microbiology, Faculty of Agrobioengineering, University of Life Sciences, Lublin, Poland |
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| Abstract: | In this study, effects of an increase in concentration of fullerene-C60, single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs) or fullerene soot (FS) on overall microbial activity was investigated over a 21 d incubation period. Microbial utilisation of 14C-glucose and uptake of 14C-glucose into the microbial biomass was investigated. For CNM-amended soils, greater extents of 14C-glucose mineralisation were found in the C60-amended soils compared to MWCNT-, SWCNT- or FS-amended soils. In addition, the 100 and 1000 mg kg?1 were consistently found to have higher extents of mineralisation in C60, MWCNT, SWCNT or FS-amended soils, respectively. Further, the incorporation of 14C-glucose into the microbial biomass declined slightly with an increase in concentration in the amended soils, but no consistent pattern was observed. As a result, the biophysical quotient (BQ) increased significantly (P < 0.05), as concentrations increased from 1 mg kg?1 to 1000 mg kg?1 in all C60-, MWCNT-, SWCNT- and FS-amended soils. The results obtained from this study showed that the addition to carbon nanomaterials had no profound impacts on the overall microbial activity, and the overall influence of CNMs on soil microbial activity does not reveal a specific pattern in the short term. |
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| Keywords: | Carbon nanomaterials Substrate utilisation Microbial biomass Fumigation extraction Biophysical quotient |
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