Comprehensive insights into the gallic acid assisted bioleaching process for spent LIBs: Relationships among bacterial functional genes, Co(III) reduction and metal dissolution behavior.
In: Journal of Hazardous Materials, Jg. 447 (2023-04-05), S. N.PAG
academicJournal
Zugriff:
Despite the growing demand for resource recovery from spent lithium-ion batteries (LIBs) by bioleaching, low Co leaching efficiency has hindered the development and application of this technology. Therefore, a novel process was designed, combining gallic acid (GA) and mixed culture bioleaching (MCB), to enhance the removal of metals from spent LIBs. Results indicated that the GA + MCB process achieved 98.03% Co and 98.02% Li leaching from spent LIBs, simultaneously reducing the biotoxicity, phytotoxicity and leaching toxicity of spent LIBs under optimal conditions. The results of mechanism analysis demonstrated that functional microorganisms adapted to the leaching system through various strategies, including oxidative stress reduction, DNA damage repair, heavy metal resistance and biofilm formation, maintaining normal physiological activities and the continuous production of biological acid. The biological acid erodes the surface of waste LIBs, causing some Co and a large amount of Li to be released, while also increasing the contact area between GA and Co(III). Therefore, GA is beneficial for reducing insoluble Co(III), forming soluble Co(II). Finally, biological acid can effectively promote Co(II) leaching. Collectively, the results of this study provide valuable insight into the simultaneous enhancement of metal extraction and the mitigation of environmental pollution from spent LIBs. [Display omitted] • Effective metal leaching and toxicity reduction of spent LIBs could be achieved. • The role of gallic acid was to accelerate the reduction of Co(III) to soluble Co(II). • Bacteria had defense systems against the harsh leaching environment. • Bacteria remained active, producing acid to leach Co and Li from spent LIBs. • The GA assisted bioleaching process achieved 98.03% Co and 98.02% Li extraction. [ABSTRACT FROM AUTHOR]
Titel: |
Comprehensive insights into the gallic acid assisted bioleaching process for spent LIBs: Relationships among bacterial functional genes, Co(III) reduction and metal dissolution behavior.
|
---|---|
Autor/in / Beteiligte Person: | Liao, Xiaojian ; Ye, Maoyou ; Liang, Jialin ; Jian, Jianxiong ; Li, Shoupeng ; Gan, Qiaowei ; Liu, Zihang ; Mo, Zhihua ; Huang, Yu ; Sun, Shuiyu |
Link: | |
Zeitschrift: | Journal of Hazardous Materials, Jg. 447 (2023-04-05), S. N.PAG |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 0304-3894 (print) |
DOI: | 10.1016/j.jhazmat.2023.130773 |
Schlagwort: |
|
Sonstiges: |
|