ArticleACS omega2026
Thiourea-formaldehyde-Functionalized Graphene Oxide for the Selective Removal of Copper from Multielement Solution.
Article in ACS omega, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
6 authors.
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Abstract
Copper (Cu), a critical raw material (CRMs) essential for renewable energy technologies, requires sustainable recovery strategies to ensure supply security and minimize environmental impacts. Recent market trends highlight the growing economic and strategic importance of Cu, reinforcing the need for selective recovery from secondary and waste-derived resources. However, Cu separation from complex waste streams, such as wind turbine leachates, remains challenging due to competition from base metals and rare earth elements. In this study, a thiourea-formaldehyde functionalized graphene oxide (G3DTF) is introduced as a new sulfur- and nitrogen-rich hybrid sorbent for selective Cu recovery under competitive conditions. Unlike conventional graphene-based materials, G3DTF incorporates tailored S/N donor sites within a graphene oxide framework, creating preferential coordination environments for Cu. The sorbent was evaluated in both monoelement and equimolar multielement solutions (100 μM of each element: boron, cobalt, copper, nickel, praseodymium, neodymium, gadolinium, dysprosium). Under optimized conditions, G3DTF achieved up to ≈99% Cu removal while exhibiting negligible uptake of competing ions. Langmuir isotherm analysis yielded a maximum adsorption capacity (
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