(Polyacrylamide-Kaolin) Composite Used For Extraction Precious Metals (Au+1, Ag+1) From Electronic Waste Solution by Using Hydrometallurgical Method
DOI:
https://doi.org/10.31185/ejuow.Vol7.Iss3.136Keywords:
electronic waste; (Polyacrylamide-Kaolin) composite; extraction hydrometallurgy; precious metals; adsorption (efficiency and capacity)Abstract
Abstract— In this study, electronic waste solution was prepared by leached amount of waste in dilute aqua regia (1HNO3: 3HCl). Hydrometallurgy method (solvent extraction) used to extract precious metals (Au+1, Ag+1) from electronic waste by added both of mineral clay (kaolin) and (Polyacrylamide-Kaolin) composite as a adsorbent material to e- waste solution under many of different parameters. These parameters are contact time (i.e.30 min, 60 min, and 120 min), weight in volume unit of adsorbent material (i.e. 5, 10 and 20 g.L-1) which are effects on the adsorption capacity and adsorption efficiency of adsorbent material. Results proved that the adsorption (efficiency and capacity) of Polyacrylamide-Kaolin composite relatively increased than kaolin to extract (Au+1, Ag+1) ions from a neutral e-waste solution. According to the curves of adsorption (i.e. efficiency and capacity), the operation condition preferred at contact time and adsorbent material amount which are equal to 60 min and 10 g.L-1 respectively
References
1- Santhanam N., Melvin S., Ramalingam C.,ʺ Electronic waste – an emerging threat to the environment of urban Indiaʺ, J Environ Health Sci Eng, V.12,2014.
2- Muibat O.F., Veronica M. N., Olubukola O. B.ʺHeavy Metal Pollution from Gold Mines: Environmental Effects and Bacterial Strategies for Resistanceʺ, J Environ Health Sci Eng,V.13(11), 2016. 3- Martin O., ʺ Electronic Waste Management in Ghana – Issues and Practicesʺ,Chapter (PDF Available), July 2012 . 4- Koen B., Peter T.J., ʺSolvometallurgy: An Emerging Branch of Extractive Metallurgyʺ, J. Sustainable Metallurgy, V.3, No.3, 2017.
5- Jing-ying L, Xiu-li X, Wen-quan L, ʺThiourea leaching gold and silver from the printed circuit boards of waste mobile phonesʺ, Waste Manag., 32(6),2012. 6- Patrícia M. H., Hugo M. V., Andréa M. B., ʺLeaching of gold and silver from printed circuit board of mobile phonesʺ, Waste Manag., Rev. Esc. Minas v.68, no.1, 2015.
Patrícia M. H., Hugo M. V., Andréa M. B., ʺLeaching of gold and silver from printed circuit board of mobile phonesʺ, Waste Manag., Rev. Esc. Minas v.68, no.1, 2015.7- Behnamfard , Salarirad, Veglio , ʺProcess development for recovery of copper and precious metals from waste printed circuit boards with emphasize on palladium and gold leaching and precipitationʺ, Nov;33(11), 2013:2354-63.
8- Abdul Khaliq, ʺMuhammad Akbar Rhamdhani , Geoffrey Brooks,Syed Masood, ʺ Metal Extraction Processes for Electronic Waste and Existing Industrial Routes: A Review and Australian Perspectiveʺ, Resources, Vol.3, no. 1, 2014.
9- JadhavU. and HochengH., ʺ Process development for recovery of copper and precious metals from waste printed circuit boards with emphasize on palladium and gold leaching and precipitationʺ, Scientific Reports volume5, Article number: 14574 (2015)
