Microbial Comparison in Synthesizing Gold Nanoparticles for Harvesting Gold in Wastewater System

摘要

Since the green chemistry strategy are well known for its safe, easy, nontoxic, biocompatible and especially environmental friendly to all users. Recently, more nanomaterials are synthesized by an alternative eco-friendly methods of the uses of plants and/or microorganisms that are applied in many areas such as electronics, nanotechnology, and especially the synthesis of novel materials with unique properties and purposes. In this study, the researchers aimed to isolate microorganisms demonstrating the formation of gold nanoparticles (AuNPs) from washing process in gold/jewelry carving factory. The isolates synthesizing intracellular AuNPs which were identified to be Bacillus sp. based on 16S rRNA amplification, sequencing analysis and comparison. The factors including pH, temperature, reducing agents, duration of AuNP formation, and predominantly intracellular gold formation were chosen for future practical application in harvesting AuNPs from the waste water in gold carving factory.