Extraction of gold(III) from chloride media in aqueous polyethylene glycol-based two-phase system

Mechanism of gold (III) extraction using a novel ionic liquid-based aqueous two phase system without additional extractants

“…Aqueous two phase systems (ATPSs) can be prepared as a consequence of two immiscible polymers, a polymer with a salt or two immiscible salts above a certain concentration [1,2]. Due to the high water content in both top and bottom phases, ATPSs have advantages over the traditional solvent extractions: (i) no volatile organic solvents are involved which makes it environmental friendly; (ii) ATPSs provide a benign environment for the bioactive substances such as proteins, enzymes and amino acids (iii) ATPSs have relative reliability in scaling up and can guarantee the yield of the product [3,4].…”

Biosorption of Phenol and Cyanide from Synthetic/Simulated Wastewater by Sugarcane Bagasse—Equilibrium Isotherm and Kinetic Analyses

“…To study the biosorption as a function of dose 0.5-60 g/L of sugarcane bagasse for phenol and cyanide was considered, and pH (8), contact time (40 h), temperature (30°C), and initial concentration (300 mg/L of phenol and 30 mg/L of cyanide) were kept constant. To evaluate the effect of pH, 2-12 pH range was used, whereas biosorbent dose, contact time temperature, and initial concentrations were kept constant.…”

“…Exposure to even low concentrations of cyanide can cause heart pains, coma, breathing disorders, headaches, and even death. On the other hand, phenol exposure can lead to eye and skin injuries, headache, vomiting, lung, liver, kidney, and heart damage ultimately leading to death [8]. Therefore, it is important to remove phenol and cyanide from industrial wastewater and discharges.…”

Direct extraction of palladium and silver from waste printed circuit boards powder by supercritical fluids oxidation-extraction process

“…Then these ion-association complexes diffused through molecular diffusion from the interface to supercritical fluid phase and were solvated by Sc-CO 2 molecules (Eqs. (11) and (12)) [40]. Finally, Pd and Ag were selectively separated from PMC through dynamic Sc-CO 2 extraction.…”