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High-efficiency gold recovery by additive-induced supramolecular polymerization of ß-cyclodextrin.
Wu, Huang; Wang, Yu; Tang, Chun; Jones, Leighton O; Song, Bo; Chen, Xiao-Yang; Zhang, Long; Wu, Yong; Stern, Charlotte L; Schatz, George C; Liu, Wenqi; Stoddart, J Fraser.
Afiliación
  • Wu H; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Wang Y; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Tang C; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Jones LO; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Song B; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Chen XY; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Zhang L; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Wu Y; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Stern CL; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Schatz GC; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA.
  • Liu W; Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL, 33620, USA. wenqi@usf.edu.
  • Stoddart JF; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA. stoddart@northwestern.edu.
Nat Commun ; 14(1): 1284, 2023 Mar 09.
Article en En | MEDLINE | ID: mdl-36894545
Developing an eco-friendly, efficient, and highly selective gold-recovery technology is urgently needed in order to maintain sustainable environments and improve the utilization of resources. Here we report an additive-induced gold recovery paradigm based on precisely controlling the reciprocal transformation and instantaneous assembly of the second-sphere coordinated adducts formed between ß-cyclodextrin and tetrabromoaurate anions. The additives initiate a rapid assembly process by co-occupying the binding cavity of ß-cyclodextrin along with the tetrabromoaurate anions, leading to the formation of supramolecular polymers that precipitate from aqueous solutions as cocrystals. The efficiency of gold recovery reaches 99.8% when dibutyl carbitol is deployed as the additive. This cocrystallization is highly selective for square-planar tetrabromoaurate anions. In a laboratory-scale gold-recovery protocol, over 94% of gold in electronic waste was recovered at gold concentrations as low as 9.3 ppm. This simple protocol constitutes a promising paradigm for the sustainable recovery of gold, featuring reduced energy consumption, low cost inputs, and the avoidance of environmental pollution.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido