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

ABSTRACT: Modification of metal oxides with organophosphonic acids (PAs) provides the ability to control and tailor the surface properties. The metal oxide phosphonic acid bond (M-O-P) is known to be stable under harsh conditions, making PAs a promising candidate for the recovery of metals from complex acidic leachates. The thiol functional group is an excellent regenerable scavenging group for these applications. However, the research on organophosphonic acid grafting with thiol groups is very limited. In this study, four different metal sorbent materials were designed with different thiol surface coverages. An aqueous-based grafting of 3-mercaptopropylphosphonic acid (3MPPA) on mesoporous TiO₂ was employed. Surface grafted thiol groups could be obtained in the range from 0.9 to 1.9 grou

SUBMITTER: Gys N 

PROVIDER: S-EPMC9756939 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature