Recovery of silver from thiosulfate and thiocyanate leach solutions by adsorption on anion exchange resins and activated carbon

Recovery of high-purity silver directly from dilute effluents by an emulsion liquid membrane-crystallization process

“…The concentration of silver in these effluents varies widely, in spent developing and fixing solutions, the concentration of silver may be as high as several g/L, but in waste rinse water it may be as low as a few mg/L. Methods such as solvent extraction, adsorption, electrochemical deposition, and chemical precipitation have been investigated for recovering silver from developing and fixing solutions [3][4][5][6]. Waste rinse water from the photographic industry is often discharged after being treated to reach the national emission standard (<0.5 mg/L) and seldom considered the recovery of silver, which inevitably results in loss of silver.…”

Electrochemical reclamation of silver from silver-plating wastewater using static cylinder electrodes and a pulsed electric field

“…To date, many methods have been developed to recover silver from industrial wastewater, including chemical reduction [5], membrane filtration [6], ion exchange [7], adsorption [8], and electrochemical methods [9][10][11][12][13]. Each of the methods has pros and cons in practical applications.…”

Sorption Extraction of Noble and Non-Ferrous Metals from Process Leaching Solutions

“…Investigated by the authors strong-base anion-exchange resins (АВ-17, АМ, IRA-400), having high sorption capacity and anion exchange ability in acidic and alkaline media, fail to meet requirements for selectivity of noble metal ions extraction. Quite a number of works are devoted to extraction of noble metals from chloride (Laatikainen and Paatero, 2005;Aktas and Morcali, 2011), thiocyanate (Li et al, 2012;Kononova et al, 2007) and thiosulfate (Fotoohi and Mercier, 2015) solutions using various sorbents.…”