MICROBIAL-INDUCED SYNTHESIS OF NANOPARTICLES OF ZINC PHOSPHATE AND BASIC ZINC CARBONATE BASED ON THE DEGRADATION OF GLYPHOSATE

Microbial-induced synthesis of nanoparticles of zinc phosphate and basic zinc carbonate based on the degradation of glyphosate, as a new green and environmental method, is being paid extensive attention to in that it has low cost, simple operation and rapid effects. This research, glyphosate was decomposed into phosphate ions, carbon dioxide and water under the enzymatic action of Bacillus subtilis and Saccharomyces sp.. Meanwhile, carbon dioxide was absorbed, transformed and produced carbonate ions under the enzymatic action of Paenibacillus mucilaginosus. Phosphate ions and carbonate ions which obtained by the degradation of glyphosate could mineralize zinc ions into phosphate and carbonate precipitations. The compositional and morphological properties of phosphate and carbonate precipitations were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA). The characterization data obtained showed that zinc phosphate and basic zinc carbonate were successfully synthesized by microbial method in this process. Zinc phosphate and basic zinc carbonate was shown to be nanometer-grade in size and sphere-like in shape. Furthermore, the phase composition, functional groups, and surface morphology of samples obtained by microbial method were mainly similar to that by chemical method.