title: Electrochemical extraction of gold from wastes as nanoparticles stabilized by phospholipids.
abstract: A simple one-step method for the extraction of gold from wastes as nanoparticles stabilized by phospholipids is demonstrated. This is achieved by applying an AC voltage for 5s to the gold-containing wastes, which act as the electrodes in a buffer solution containing a dispersed phospholipid (1,2-dioleoyl-sn-glycero-3-phosphocholine, DOPC). This is an environmentally friendly and rapid method for recovering gold from wastes. The extracted gold nanoparticles have significant potential as a catalyst or biomedical material.
authors.affiliation: Shinshu University, Faculty of Textile Science and Technology, Division of Applied Biology, 3-15-1, Tokida, Ueda 386-8567, Japan; Shinshu University, Division of Instrumental Analysis (Ueda branch), Research Center for Supports to Advanced Science, 3-15-1, Tokida, Ueda 386-8567, Japan. Electronic address: moriwaki@shinshu-u.ac.jp.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Moriwaki
authors.affiliation: Shinshu University, Faculty of Textile Science and Technology, Division of Applied Biology, 3-15-1, Tokida, Ueda 386-8567, Japan.
authors.forename: Kotaro
authors.initials: K
authors.lastname: Yamada
authors.affiliation: Shinshu University, Faculty of Textile Science and Technology, Division of Chemistry and Materials, 3-15-1, Tokida, Ueda 386-8567, Japan.
authors.forename: Hisanao
authors.initials: H
authors.lastname: Usami
mesh_terms: D005591:Chemical Fractionation / Q000379:methods; D055664:Electrochemical Techniques / Q000379:methods*; D059029:Electronic Waste; D006046:Gold / Q000737:chemistry / Q000302:isolation & purification*; D006531:HEPES / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D010713:Phosphatidylcholines / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry*; D018505:Waste Management / Q000379:methods*
chemical_list: D010713:Phosphatidylcholines; D010743:Phospholipids; D006046:Gold; C017251:1,2-oleoylphosphatidylcholine; D006531:HEPES
keywords: AC voltage; E-waste; Gold extraction; Gold nanoparticles; Phospholipid