Using a Novel &lt;em&gt;Mucorindicus&lt;/em&gt;CBS 226.29 ET for Biosynthesis of Gold Nanoparticles and Applying them in Nanoremediation of Azo Dyes

A.N.Z Alshehri

doi:10.19026/rjaset.15.5852

Abstract

Fungus of MucorindicusCBS 226.29 ET, in this study was used to synthesize gold nanoparticles (AuNPs). Synthesis of nanoparticles by microorganisms may offer an environmentally friendly and affordable alternative to traditional physical and chemical methods. The microbial synthesis of nanoparticles is an approach based on green chemistry which mutually connects microbial biotechnology and nanotechnology. A surface level plasmon resonance peak was observed at 500 nm by UV-bis spectra of AuNPs. Images of AuNP via transmission electron microscope exhibited various shapes and dispersibility characteristics. The synthesis of AuNPs were optimum at the conditions 1.5 mM/L of HAuCl4, 0.6 g biomass and pH range 7-11. The decolorization of different azo dyes was catalyzed efficiently with the bio-AuNPs and a new microbial resource candidate was thus demonstrated for these AuNPs through green synthesis, along with a potential bio-AuNP application for decolorization of azo dyes.

Highlights

Superior characteristics of nanomaterials relative to bulk materials gives them a potential for application in every aspect of our lives (Kuang et al, 2013)
Many traditional physical and chemical methods are available for the synthesis of AuNPs, their stability and the concern over using toxic chemicals during production of AuNPs is considered problematic (Narayanan and Sakthivel, 2010; Das et al, 2010), an urgent need exists for developing an eco-friend process for synthesizing AuNPs
More fungi isolates need to be discovered for the biosynthesis of AuNPs and to overcome the major challenges related to shape, size and disparity

Summary

INTRODUCTION

Superior characteristics of nanomaterials relative to bulk materials gives them a potential for application in every aspect of our lives (Kuang et al, 2013). More fungi isolates need to be discovered for the biosynthesis of AuNPs and to overcome the major challenges related to shape, size and disparity. These the three aforementioned major challenges have been shown in some reports to be affected by biomass and substrate concentrations and pH value (Gericke and Pinches, 2006; Pimprikar et al, 2009; Mishra et al, 2011). Some of microorganisms have been reported to be capable of treating azo dye pollutants efficiently such as Pseudomonas, Shewanella and Bacillus (Xu et al, 2007; Chen et al, 2011; Fang et al, 2015). The optimum conditions of different parameters for biosynthesis of AuNPs were ascertained and various azo dyes underwent decolorization to evaluate catalytic characteristics of the bio-AuNPs being prepared

MATERIALS AND METHODS

RESULTS AND DISCUSSION

CONCLUSION