Dissolution of Ag Nanoparticles in Agricultural Soils and Effects on Soil Exoenzyme Activities
| Autor: | N. Cruz, Tito Trindade, Daniela S. Tavares, Paula Alvarenga, Paul F.A.M. Römkens, Sónia M. Rodrigues, Márcia Farto, Clarisse Mourinha, Armando C. Duarte, Eduarda Pereira |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
inorganic chemicals
silver nanoparticles soil extraction tests exoenzyme activities Soil extraction tests 02 engineering and technology 010501 environmental sciences 01 natural sciences complex mixtures fungicides Silver nanoparticle lcsh:TD1-1066 Soil pH Exoenzyme activities Organic matter Duurzaam Bodemgebruik lcsh:Environmental technology. Sanitary engineering Dissolution Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences General Environmental Science Fungicides chemistry.chemical_classification Sustainable Soil Use biology Renewable Energy Sustainability and the Environment Extraction (chemistry) polymer coating Polymer coating 021001 nanoscience & nanotechnology chemistry Environmental chemistry Glycine Soil water biology.protein Exoenzyme Silver nanoparticles 0210 nano-technology |
| Zdroj: | Environments Volume 8 Issue 3 Environments 8 (2021) 3 Environments, Vol 8, Iss 22, p 22 (2021) Environments, 8(3) Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 2076-3298 |
| DOI: | 10.3390/environments8030022 |
| Popis: | To assess environmental risks related to the mobility and toxicity of AgNPs, the chemical availability of AgNPs and polyvinylpyrrolidone-coated AgNPs (PVP-AgNPs) in three agricultural soils was quantified in a pot experiment. Porewater collection and soil extractions with 0.01 M CaCl2, 0.4 M Glycine (pH 1.5) and 0.05 M NH4-EDTA were performed. The effect on soil exoenzyme activities was also assessed. Porewater concentration was low (< 0.4% and < 0.04% of dosed Ag, for AgNPs and PVP-AgNPs, respectively) and only detected in acidic soils (pH 4.4 and 4.9). The PVP-coating reduced the downward mobility of AgNPs in soil and possibly also their dissolution rate (and subsequent release of dissolved Ag+ ions into porewater). The effect of variation in organic matter on soil enzymatic activity was larger than that of AgNPs, as no significant additional inhibitory effect from Ag could be observed. Only at low pH and in the presence of complexing ligands that form very stable Ag complexes (0.4 M Glycine extraction at pH 1.5) up to 58% of the Ag added to soil was released (independently of PVP coating). An extraction with glycine is proposed as a useful indicator of potentially available Ag in soils. |
| Databáze: | OpenAIRE |
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