green-synthesis | Ricerc@Sapienza

Mangrove helps. Sonneratia alba-synthesized silver nanoparticles magnify guppy fish predation against Aedes aegypti young instars and down-regulate the expression of envelope (E) gene in dengue virus (serotype DEN-2)

The control of dengue vectors with effective tools is crucial. Here, we fabricated silver nanoparticles (AgNP) using a cheap method relying to a mangrove extract (Sonneratia alba) as a reducing and stabilizing agent. AgNP were characterized by UV–vis spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction. LC50of S. alba extract against Aedes aegypti ranged from 192.03 ppm (larva I) to 353.36 ppm (pupa). LC50of AgNP ranged from 3.15 (I) to 13.61 ppm (pupa).

Cr(VI) removal by green-synthetized iron-based nanoparticles. Effect of Cr(VI) concentration and pH condition on adsorption process

The removal of hexavalent Chromium from aqueous solutions by adsorption method has been investigated. In this study, magnetic nanoparticles were used as adsorbent materials and their synthesis was performed by using two different ways including a classical ammonia synthesis (nMG) and a green approach by using fructose and NaOH (GnMG). The Cr(VI) removal tests demonstrated that the synthesis procedure adopted did not influence the results.