Parabéns, Profa. Eliana Lima

A Profa. Eliana M. Lima publicou na Nature Communications sobre nanopartículas com precipitação fotoinduzida

Nature Communications | Article

 

Nanoparticles with photoinduced precipitation for the extraction of pollutants from water and soil

 

Ferdinand Brandl, Nicolas Bertrand, Eliana Martins Lima, Robert Langer

Nature Communications 6, Article number:7765
doi:10.1038/ncomms8765
Received
Accepted
Published

artigo completo: aqui


Nanotechnology may offer fast and effective solutions for environmental clean-up. Herein, amphiphilic diblock copolymers are used to develop a platform of photosensitive core-shell nanoparticles. Irradiation with ultraviolet light removes the protective layer responsible for colloidal stability; as a result, the nanoparticles are rapidly and irreversibly converted to macroscopic aggregates. The associated phase separation allows measuring the partitioning of small molecules between the aqueous phase and nanoparticles; data suggests that interactions are enhanced by decreasing the particle size. Adsorption onto nanoparticles can be exploited to efficiently remove hydrophobic pollutants from water and contaminated soil. Preliminary in vivo experiments suggest that treatment with photocleavable nanoparticles can significantly reduce the teratogenicity of bisphenol A, triclosan and 17α-ethinyl estradiol without generating obviously toxic byproducts. Small-scale pilot experiments on wastewater, thermal printing paper and contaminated soil demonstrate the applicability of the approach.

 

 

Nanoparticles that lose their stability upon irradiation with light have been designed to extract endocrine disruptors, pesticides, and other contaminants from water and soils. The system exploits the large surface-to-volume ratio of nanoparticles, while the photoinduced precipitation ensures nanomaterials are not released in the environment.

New study shows how nanoparticles can clean up environmental pollutants

Nanomaterials and UV light can “trap” chemicals for easy removal from soil and water.

Jonathan Mingle | MIT News correspondent

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