Anže Zupanc (Avtor), Joseph Install (Avtor), Timo Weckman (Avtor), Marko M. Melander (Avtor), Marianna Kemell (Avtor), Karoliina Honkala (Avtor), Timo Repo (Avtor)

Povzetek

Recycling silver from waste materials is becoming increasingly important to secure its supply. The design of new sustainable separative recycling strategies is highly desired to replace current, environmentally burdensome processes. Herein, we disclose a novel sustainable recycling concept for Ag. It includes the facile dissolution of silver using the most common fatty acids – oleic, linoleic and linolenic acid – that reaches 4.6 % of silver per fatty acid weight and high dissolution rates of up to 1.62 mol/m2h calculated from the wire mass loss during dissolution. The addition of ethyl acetate to the reaction mixture separates silver carboxylates − analyzed by NMR, IR, EDS and CHN combustion analysis − from the unreacted acids that can be recycled. As also introduced here, the light-enabled reduction in a reactor consisting of two 30 W 6700 K CFL lights with wavelengths of 400–650 nm is a powerful and safe method to bring silver back to its easily separable elemental form, determined by SEM-EDS. The protocol uses 30 % aqueous hydrogen peroxide as a green oxidant under benign conditions and can be applied to urban mining from waste silver-plated keyboard connection plastics and for the notable separation of silver from other metals.

Ključne besede

recikliranje;srebro;trajnostni razvoj;valorizacija odpadkov;maščobne kisline;zelena kemija;recycling;silver;sustainability;waste valorization;fatty acids;green chemistry;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 546.57:66
COBISS: 231451651 Povezava se bo odprla v novem oknu
ISSN: 1385-8947
Št. ogledov: 156
Št. prenosov: 28
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: recikliranje;srebro;trajnostni razvoj;valorizacija odpadkov;maščobne kisline;zelena kemija;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-10
Zvezek: ǂVol. 512ǂ, [article no.] 162129
Čas izdaje: 15 May 2025
DOI: 10.1016/j.cej.2025.162129
ID: 26668451