Gold recovery from cyanide solutions with a new fibrous polymer adsorbent

Abstract

In a resin-in-pulp process for the recovery of gold cyanide from a very dilute solution it is desirable that the resin should exhibit the ability to load gold at the natural pH of the leach liquor and be stripped by an aqueous alkali. The present work describes the results of gold cyanide adsorption by new ion-exchange hollow fibers prepared by the amination of sulfochlorinated polyethylene. The fibers, chopped into suitably sized pieces, showed very fast adsorption and desorption of gold from mixed cyanide solutions.

Metallurgical recovery of metals from electronic waste: A review

“…These methods include cementation [110][111][112], solvent extraction [113][114][115][116][117], adsorption on activated carbon [118][119][120], and ion exchange [121][122][123][124][125][126].…”

Selective recovery of gold by simultaneous adsorption–reduction using microalgal residues generated from biofuel conversion processes

“…From a practical point of view, the recovery of gold and other precious metals will be economically beneficial in cases where the recovery cost is lower than the price of the metals. Conventional technologies developed for the recovery of gold include cementation,4 solvent extraction,5–7 electrochemical processes,8 and ion exchange 9, 10. Among these, various biomass‐based materials are currently receiving increasing attention for metal recovery from waste solutions because, compared with conventional synthetic ion exchangers produced from petroleum, they have good performance, low cost, and are available in large quantities.…”

A review of electronic waste management microbial participation: a green technology

“…Method for recovering PM by using hydrometallurgical etching agents FeCl 2 and CuCl 2 , and hydrochloric acid (Barbieri et al, 2010) is an another similar method for recovering valuable metals from printed circuit boards by using organic solvent (like N, N-dimethylformamide, methyl ethyl keton, tetra hydro furan), while and electrostatic separation method was proposed by Lee et al (2009) via Patent No. WO 2009 Separation of gold require special strategies some of these includes electrochemical method (Castellanson et al, 1984); resin-in-pulp process using fibrous polymer absorbent (Belfer and Binman, 1996); pressure oxidation in an autoclave with controlled oxygen supply (Thomas et al, 1996); coarse carbon gold recovery process (Hill and Lin, 2001); photocatalytically using ZnO nanopowder (Park et al, 2006) weakly-basic anion-exchange material comprising a polymeric felt incorporating radiation-grafted pyridinyl functional groups (D'Agostino et al, 1985).…”