The Positive Fate of Biochar Addition to Soil in the Degradation of PHBV-Silver Nanoparticle Composites.

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ID: 59815
2018
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Abstract
The environmental contamination of soils by polymeric and nanomaterials is an increasing global concern. Polymeric composites containing silver nanoparticles (AgNP) are collectively one of the most important products of nanotechnology due to their remarkable antimicrobial activity. Biochars are a promising resource for environmental technologies for remediation of soils considering their high inorganic and organic pollutant adsorption capacity and microbial soil consortium stimulation. In this work we report, for the first time, the use of biochar material as a tool to accelerate the degradation of polyhydroxybutyrate- co-valerate (PHBV) and PHBV composites containing AgNP in a tropical soil system, under laboratory conditions. This positive effect is associated with microbial community improvement, which increased the degradation rate of the polymeric materials, as confirmed by integrated techniques for advanced materials characterization. The addition of 5-10% of sugarcane bagasse biochar into soil has increased the degradation of these polymeric materials 2 to 3 times after 30 days of soil incubation. However, the presence of silver nanoparticles in the PHBV significantly reduced the degradability potential of this nanocomposite by the soil microbial community. These results provide evidence that AgNP or Ag ions caused a decline in the total number of bacteria and fungi, which diminished the polymer degradation rate in soil. Finally, this work highlights the great potential of biochar resources for application in soil remediation technologies, such as polymeric (nano)material biodegradation.
Reference Key
goncalves2018theenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gonçalves, Suely Patrı Cia Costa;Strauss, Mathias;Martinez, Diego Stéfani Teodoro;
Journal Environmental science & technology
Year 2018
DOI
10.1021/acs.est.8b01524
URL
Keywords
Chemotherapy gene therapy ovarian cancer targeted delivery mir-21 cisplatin as1411 aptamer plga nanoparticles antisense chemoresistant

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