Highly efficient and selective adsorption of palladium(II) from simulated nuclear waste solution using Amberlite XAD-7 resin impregnated with a phenanthroline-derived diamide

Kinetic and Thermodynamic Studies of Precious Metals Sorption on Impregnated Lewatit VP OC 1026 from Chloride Solutions

“…In order to investigate kinetics of sorption of gold(III), platinum(IV) and palladium(II) ions on Lewatit VP OC 1026-Aliquat 336, the sorption kinetic models: pseudo-first-order (2), pseudo-second-order (3) and diffusion models as well as intra-particle diffusion model ( 4) and Dunwald-Wagner model (5) were used. Linear forms of these models are described by: ln q e À q t ð Þ ¼ lnq e À k 1 � t ðPFOÞ (2) q e = 0.8 mg/g Au(III) [25] XAD-7 impregnated by IL101 C = 0.01 M HCl, Agitation time: 7 days; q e = 87.9 mg/g Au(III) [26] XAD-1180 impregnated by IL101 C = 0.01 M HCl, Agitation time: 7 days; q e = 126 mg/g Au(III) [26] N-(diethylthiophosphoryl)-aza [18]crown-6 immobilized into Amberlite XAD-4 resin C = 0.05 M HCl q e = 42 mg/g Au(III) [27] Amberlite XAD-7 resin with a phenanthroline-derived diamide extractant N,N'diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen) C = 3 M HNO 3 q e = 74.6 mg/g Au(III) [28] XAD7HP impregnated by 2-mercaptobenzoxazole (MBO)/XAD7HP C = 0.5 M HNO 3 q e = 98.4 mg/g Pd(II) [29] Chitosan with dibenzo-18-crown-6-ether (Chitosan-DB18 C6) C o = 150 mg/L Pd(II), pH = 2 C o = 175 mg/L Pt(IV), pH = 2 q e = 17.6 mg/g Pd(II) q e = 98.4 mg/g Pt(IV) [30] Amberlite XAD7 functionalized with dibenzo-18-crown ether-6 (XAD7-DB18 C6) pH = 2, T = 298 K q e = 6.5 mg/g Pd(II) [31] Alginate-Cyanex 302 microcapsules 0.5 M HCl, T = 293 K q e = 22.1 mg/g Pd(II) [32] Monomer-impregnated adsorbent (MTCA XAD7) C o = 850 mg/L Pd(II), C = 1 M HCl q e = 7.9 mg/g Pd(II) [33] 2,2'-thiobisethanol dimethacrylate/ ethylene glycol dimethacrylate copolymer C = 4 M HCl q e = 100 mg/g Au(III) [34] Purogold™ A194 resin C = 1 M HNO 3 , T = 294 K q e = 0.76 mmol/ g Pd(II) [35] Lewatit VP OC 1026 impregnated by Aliquat 336 C = 0.1 M HCl, Agitation time: 24 h, T = 293 K, m:V = 0.1 g : 25 cm 3 q e = 94.1 mg/g Au(III) q e = 38.2 mg/g Pd(II) q e = 36.2 mg/g Pt(IV)…”