Advanced bis-thiourea polymer resins for efficient gold (III) recovery
Abstract
Building upon our previous studies on gold recovery, this work presents an enhanced approach for the selective extraction of gold (Au(III)) from secondary sources using solid-liquid extraction. In light of the economic value attributed to gold, in addition to its distinctive properties and the increasing demand for it, the effective recycling of gold from waste streams becomes a matter of significant importance. Among various recovery techniques, solid-phase extraction offers notable advantages in terms of selectivity and reusability. In this study, we further develop and optimize chelating resins synthesized via alkaline polycondensation of two thiourea-functionalized phenolic monomers with formaldehyde. The resulting formo-phenolic bis-thiourea polymers were evaluated for their gold-binding performance. Sorption experiments demonstrated significantly improved gold uptake capacities of 710 and 833 mg/g, respectively. Moreover, sorption selectivity experiments indicated strong preferential binding of Au(III) even in the presence of competing metal ions such as Pd(II), Ru(III), Rh(III), Pt(II), Zn(II), Cu(II), Ni(II), Fe(II), and Al(III). These findings confirm that the developed chelating resins offer a high-capacity and highly selective platform for the recovery of gold, representing an advancement over our earlier work.
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BibTeX
@article{khoueiry2026advanced,
title = {{Advanced bis-thiourea polymer resins for efficient gold (III) recovery}},
author = {Claudine El Khoueiry and Fabrice Giusti and Evan Lelong and Bilal Nsouli and Iyad Karame and Stéphane Pellet-Rostaing and Guilhem Arrachart},
journal = {Scientific Reports},
year = {2026},
month = jul,
doi = {10.1038/s41598-026-60148-y},
url = {https://hal.science/hal-05828529v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Advanced bis-thiourea polymer resins for efficient gold (III) recovery
AU - Claudine El Khoueiry
AU - Fabrice Giusti
AU - Evan Lelong
AU - Bilal Nsouli
AU - Iyad Karame
AU - Stéphane Pellet-Rostaing
AU - Guilhem Arrachart
PY - 2026
DA - 2026/07/01
JO - Scientific Reports
DO - 10.1038/s41598-026-60148-y
UR - https://hal.science/hal-05828529v1
AB - Building upon our previous studies on gold recovery, this work presents an enhanced approach for the selective extraction of gold (Au(III)) from secondary sources using solid-liquid extraction. In light of the economic value attributed to gold, in addition to its distinctive properties and the increasing demand for it, the effective recycling of gold from waste streams becomes a matter of significant importance. Among various recovery techniques, solid-phase extraction offers notable advantages in terms of selectivity and reusability. In this study, we further develop and optimize chelating resins synthesized via alkaline polycondensation of two thiourea-functionalized phenolic monomers with formaldehyde. The resulting formo-phenolic bis-thiourea polymers were evaluated for their gold-binding performance. Sorption experiments demonstrated significantly improved gold uptake capacities of 710 and 833 mg/g, respectively. Moreover, sorption selectivity experiments indicated strong preferential binding of Au(III) even in the presence of competing metal ions such as Pd(II), Ru(III), Rh(III), Pt(II), Zn(II), Cu(II), Ni(II), Fe(II), and Al(III). These findings confirm that the developed chelating resins offer a high-capacity and highly selective platform for the recovery of gold, representing an advancement over our earlier work.
SN - 2045-2322
ER -