title: The effect of metal oxide nanoparticles on functional bacteria and metabolic profiles in agricultural soil.
abstract: A significant knowledge gap in nanotechnology is the absence of standardized protocols for examining the effect of engineered nanoparticles on soil microorganisms. In this study, agricultural soil was exposed to ZnO, SiO2, TiO2 and CeO2 nanoparticles at 1 mg g(-1). The toxicity effect was evaluated by thermal metabolism, the abundance of functional bacteria and enzymatic activity. ZnO and CeO2 nanoparticles were observed to hinder thermogenic metabolism, reduce numbers of soil Azotobacter, P-solubilizing and K-solubilizing bacteria and inhibit enzymatic activities. TiO2 nanoparticles reduced the abundance of functional bacteria and enzymatic activity. SiO2 nanoparticles slightly boosted the soil microbial activity. Pearson's correlation analysis showed that thermodynamic parameters had a strong correlation with abundance of functional bacteria and enzymatic activity. These findings demonstrated that the combined approach of monitoring thermal metabolism, functional bacteria and enzymatic activity is feasible for testing the ecotoxicity of nanoparticles on agricultural soil.
authors: School of Civil and Environmental Engineering, National "International Cooperation Based on Environment and Energy", University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, 100083, Beijing, People's Republic of China.
authors: Hankui
authors: H
authors: Chai
authors: Jun
authors: J
authors: Yao
authors: Jingjing
authors: J
authors: Sun
authors: Chi
authors: C
authors: Zhang
authors: Wenjuan
authors: W
authors: Liu
authors: Mijia
authors: M
authors: Zhu
authors: Brunello
authors: B
authors: Ceccanti
mesh_terms: D000383:Agriculture / Q000379:methods; D001419:Bacteria / Q000187:drug effects*; D002586:Cesium / Q000633:toxicity; D055442:Metabolome / Q000187:drug effects*; D053768:Metal Nanoparticles / Q000633:toxicity*; D036103:Nanotechnology / Q000379:methods; D010087:Oxides / Q000633:toxicity*; D012822:Silicon Dioxide / Q000633:toxicity; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000633:toxicity*; D013816:Thermodynamics; D014025:Titanium / Q000633:toxicity; D015034:Zinc Oxide / Q000494:pharmacology
chemical_list: D010087:Oxides; D012987:Soil; D012989:Soil Pollutants; C009495:titanium dioxide; D002586:Cesium; D012822:Silicon Dioxide; D014025:Titanium; D015034:Zinc Oxide