Abstract
In jewelry workshops, during the production, the gold is accumulated as dust in the working environment. The recovery of these golden micro particles is provided by gold recycle workers. Nitric oxide is formed in a method called “polishing waste” which is the leaching process of gold within aqua regia (mixture of hydrochloric acid and nitric acid) for gold recovery. Nitric oxide is not only found in the working environment but also released into the atmosphere. Wet scrubbing with sodium hydroxide is used in order to eliminate NO gas, formed in the process. Since the water solubility of NO gas is very low, the wet scrubbing filtration system made with alkali materials is not sufficient alone. In this study, nitrous oxide gas (N2O), which is harmless to environment and human health, is given off to the atmosphere by reducing NO formation with addition of solid sulfamic acid to aqua regia. It was observed that NO parameter was zero and nitric oxide was not present at all during the process.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Academic Platform Journal of Engineering and Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
