Selective Pd recovery from acidic leachates by 3-mercaptopropylphosphonic acid grafted TiO₂: does surface coverage correlate to performance?

Abstract

Concentration-controlled surface coverages of 3-mercaptopropylphosphonic acid grafted TiO2 allows tailoring the selectivity towards Pd during sorption in a complex acidic leachate originating from a spent automotive exhaust catalyst.

Development of highly efficient bimetallic metal organic frameworks for the extraction of Pd(ii) from aqueous solutions

“…[28][29][30] A wide variety of adsorbents have been utilized recently to efficiently extract palladium from aqueous solution. [31][32][33][34][35][36] The newly emerging solid phase adsorbents, metal organic frameworks (MOFs), are 3D porous crystalline materials that are self-assembled through coordination bonds between the metal cluster and organic linker. Due to their structural tailorability, easy functionalization, high surface area and high adsorption capacity, 35,37 MOFs are becoming superior candidates for various applications, especially in the separation of metal ions, 38 gas storage, 39 sensing, 40 and catalysis 41 compared to traditional adsorbents such as zeolites, 42 metal oxides, 43 carbon materials 44 and polymeric materials.…”