This work presents the synthesis of Au nanoparticles from gold coatings recovered from
processor pins with minimal waste generation. The process consisted of four main steps:(1)
physical recovery of pins,(2) recovery of gold coatings by acid digestion,(3) synthesis of
HAuCl4 under mild conditions and,(4) synthesis of Au nanoparticles by the Turkevich
method. The small dimensions of Au coatings allowed the synthesis of HAuCl4 with lower
amounts of HClconc and HNO3conc than those used with aqua regia. This method has …

This work presents the synthesis of Au nanoparticles from gold coatings recovered from
processor pins with minimal waste generation. The process consisted of four main steps:(1)
physical recovery of pins,(2) recovery of gold coatings by acid digestion,(3) synthesis of
HAuCl4 under mild conditions and,(4) synthesis of Au nanoparticles by the Turkevich
method. The small dimensions of Au coatings allowed the synthesis of HAuCl4 with lower
amounts of HClconc and HNO3conc than those used with aqua regia. This method has …