A New Impregnated Adsorbent for Noble Metal Ion Sorption

Abstract

Noble metals (NM) such as gold, platinum, palladium, and rhodium are widely applied in the electronics and automotive industries. Thus, the search for cheap and selective sorbents for noble metals is economically justified. Nitrolite does not sorb noble metal ions. A new impregnated sorbent was prepared. The natural sorbent Nitrolite was impregnated with Aliquat 336 using a new warm impregnation method. After the impregnation process, Nitrolite adsorbed platinum(IV), palladium(II), and gold(III) ions from the chloride solutions. The values of the sorption capacity for palladium(II) and platinum(IV) ions were 47.63 mg/g and 51.39 mg/g, respectively, from the 0.1 M HCl model solution. The sorption capacity for gold(III) ions was estimated to be 73.43 mg/g from the 0.1 M HCl model solution. An exhausted catalytic converter was leached, and platinum(IV), palladium(II), and rhodium(III) were transferred to the chloride solution. The impregnated sorbent Nitrolite–Aliquat 336 was used in the investigations of the platinum(IV), palladium(II), and rhodium(III) ions’ sorption from a real solution. The impregnated sorbent Nitrolite–Aliquat 336 proved to be suitable for the recovery of platinum(IV) and palladium(II) ions, whereas rhodium ions were not sorbed from the leached solutions. Notably, 1 M thiourea in the 1 M HCl solution desorbed platinum(IV), palladium(II), and gold(III) above 94%.

Impregnated Polymeric Sorbent for the Removal of Noble Metal Ions from Model Chloride Solutions and the RAM Module

“…In our previous studies, SIRs for the sorption of noble metals, including gold, palladium and platinum, were applied giving positive results. Properties of commercially available adsorbents were altered by their impregnating with the extractant selective for noble metal ions [ 22 , 23 ]. The paper aimed at the sorption of Au(III), Pd(II), Pt(IV) and Rh(III) ions from chloride model solutions and the verification of suitability of the impregnated resin for the recovery of noble metals from the real system, i.e., digested random access memory module.…”

Solvent Extraction of Au(III) by 2-ethylhexanol and Kinetic Modelling of the Facilitated Transport Across a Liquid Membrane

“…Though yet with not any apparent or definitive practical application, the scientific community considered of importance the recovery of gold from these various non-cyanide media, importance which is reflected by the series of publications that every year appeared in journals. In the case of gold adsorption onto different materials recent several approaches are considered by the use of metal organic frameworks [1], metal sulphides microspheres [2] or Aliquat 336 (quaternary ammonium salt) impregnating Nitrolite adsorbent [3].…”

Solvent Extraction of Gold(III) by 2-Ethylhexanol and Modeling of Facilitated Transport across a Supported Liquid Membrane

“…Though yet with no apparent or definitive practical applications, the scientific community has considered the recovery of gold from these various non-cyanide media important, an importance which is reflected by the series of publications which, every year, appear in journals. With respect to gold adsorption onto different materials, several recent approaches have been considered, including the use of metal organic frameworks [1], metal sulfide microspheres [2], or Aliquat 336 (quaternary ammonium salt) impregnating a Nitrolite adsorbent [3].…”