| Title | Biotechnology for Metal Recovery from End-of-Life Printed Circuit Boards withAspergillus niger |
|---|---|
| ID_Doc | 26764 |
| Authors | Becci, A; Karaj, D; Merli, G; Beolchini, F |
| Title | Biotechnology for Metal Recovery from End-of-Life Printed Circuit Boards withAspergillus niger |
| Year | 2020 |
| Published | Sustainability, 12, 16 |
| Abstract | The growing production and use of electric and electronic components has led to higher rates of metal consumption and waste generation. To solve this double criticality, the old linear management method (in which a product becomes waste to dispose), has evolved towards a circular approach. Printed circuit boards (PCBs) are the brains of many electronic devices. At the end of their life, this equipment represents a valuable scrap for the content of base metals such as Cu and Zn (25 and 2 wt %, respectively) and precious metals such as Au, Ag, and Pd (250, 1000, and 110 ppm, respectively). Recently, biotechnological approaches have gained increasing prominence in PCB exploitation since they can be more cost-efficient and environmentally friendly than the chemical techniques. In this context, the present paper describes a sustainable process which uses the fungal strainAspergillus nigerfor Cu and Zn extraction from PCBs. The best conditions identified were PCB addition after 14 days, Fe(3+)as oxidant agent, and a pulp density of 2.5% (w/v). Extraction efficiencies of 60% and 40% for Cu and Zn, respectively, were achieved after 21 days of fermentation. The ecodesign of the process was further enhanced by using milk whey as substrate for the fungal growth and the consequent citric acid production, which was selected as a bioleaching agent. |
Similar Articles
| ID | Score | Article |
|---|---|---|
6632
|
Alias, C; Bulgari, D; Bilo, F; Borgese, L; Gianoncelli, A; Ribaudo, G; Gobbi, E; Alessandri, I Food Waste-Assisted Metal Extraction from Printed Circuit Boards: The Aspergillus niger Route(2021)Microorganisms, 9, 5 | |
| 12498
|
Holda, A; Krawczykowska, A Bioleaching of Selected Metals from Waste Printed Circuit Boards by Fungs(2020)Inzynieria Mineralna-Journal Of The Polish Mineral Engineering Society, 2.0, 2 | |
| 24144
|
Trivedi, A; Vishwakarma, A; Saawarn, B; Mahanty, B; Hait, S Fungal biotechnology for urban mining of metals from waste printed circuit boards: A review(2022) | |
| 10958
|
Baniasadi, M; Graves, JE; Ray, DA; De Silva, AL; Renshaw, D; Farnaud, S Closed-Loop Recycling of Copper from Waste Printed Circuit Boards Using Bioleaching and Electrowinning Processes(2021)Waste And Biomass Valorization, 12, 6 | |
| 21428
|
Srivastava, RR; Ilyas, S; Kim, H; Choi, S; Trinh, HB; Ghauri, MA; Ilyas, N Biotechnological recycling of critical metals from waste printed circuit boards(2020)Journal Of Chemical Technology And Biotechnology, 95.0, 11 | |
| 10482
|
Merli, G; Becci, A; Amato, A Recovery of precious metals from printed circuit boards by cyanogenic bacteria: Optimization of cyanide production by statistical analysis(2022)Journal Of Environmental Chemical Engineering, 10, 3 | |
| 15241
|
Maluleke, MD; Kotsiopoulos, A; Govender-Opitz, E; Harrison, STL Microbial immobilisation and adaptation to Cu2+ enhances microbial Fe2+ oxidation for bioleaching of printed circuit boards in the presence of mixed metal ions(2024)Research In Microbiology, 175, 1-2 | |
| 14437
|
Fazari, J; Hossain, MZ; Charpentier, P A review on metal extraction from waste printed circuit boards (wPCBs)(2024)Journal Of Materials Science, 59, 27 | |
| 14822
|
Trivedi, A; Hait, S Metal bioleaching from printed circuit boards by bio-Fenton process: Optimization and prediction by response surface methodology and artificial intelligence models(2023) |