Pathway to industrial application of heterotrophic organisms in critical metals recycling from e-waste

IF 12.1 1区 工程技术 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
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Abstract

The transition to renewable energies and electric vehicles has triggered an unprecedented demand for metals. Sustainable development of these technologies relies on effectively managing the lifecycle of critical raw materials, including their responsible sourcing, efficient use, and recycling. Metal recycling from electronic waste (e-waste) is of paramount importance owing to ore-exceeding amounts of critical elements and high toxicity of heavy metals and organic pollutants in e-waste to the natural ecosystem and human body. Heterotrophic microbes secrete numerous metal-binding biomolecules such as organic acids, amino acids, cyanide, siderophores, peptides, and biosurfactants which can be utilized for eco-friendly and profitable metal recycling. In this review paper, we presented a critical review of heterotrophic organisms in biomining, and current barriers hampering the industrial application of organic acid bioleaching and biocyanide leaching. We also discussed how these challenges can be surmounted with simple methods (e.g., culture media optimization, separation of microbial growth and metal extraction process) and state-of-the-art biological approaches (e.g., artificial microbial community, synthetic biology, metabolic engineering, advanced fermentation strategies, and biofilm engineering). Lastly, we showcased emerging technologies (e.g., artificially synthesized peptides, siderophores, and biosurfactants) derived from heterotrophs with the potential for inexpensive, low-impact, selective and advanced metal recovery from bioleaching solutions.

Abstract Image

异养生物在电子垃圾关键金属回收中的工业应用途径。
向可再生能源和电动汽车的过渡引发了对金属前所未有的需求。这些技术的可持续发展有赖于有效管理关键原材料的生命周期,包括负责任地采购、高效使用和回收。由于电子垃圾中关键元素的矿石含量超标,且重金属和有机污染物对自然生态系统和人体具有高毒性,因此从电子垃圾中回收金属至关重要。异养微生物会分泌大量与金属结合的生物大分子,如有机酸、氨基酸、氰化物、苷元、肽和生物表面活性剂,可用于生态友好和有利可图的金属回收。在这篇综述论文中,我们对生物采矿中的异养生物以及当前阻碍有机酸生物浸出和生物氰化物浸出工业应用的障碍进行了深入探讨。我们还讨论了如何通过简单的方法(如培养基优化、微生物生长与金属提取过程分离)和最先进的生物方法(如人工微生物群落、合成生物学、代谢工程、高级发酵策略和生物膜工程)来克服这些挑战。最后,我们展示了来自异养生物的新兴技术(如人工合成肽、苷元和生物表面活性剂),这些技术具有从生物浸出溶液中进行廉价、低影响、选择性和高级金属回收的潜力。
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来源期刊
Biotechnology advances
Biotechnology advances 工程技术-生物工程与应用微生物
CiteScore
25.50
自引率
2.50%
发文量
167
审稿时长
37 days
期刊介绍: Biotechnology Advances is a comprehensive review journal that covers all aspects of the multidisciplinary field of biotechnology. The journal focuses on biotechnology principles and their applications in various industries, agriculture, medicine, environmental concerns, and regulatory issues. It publishes authoritative articles that highlight current developments and future trends in the field of biotechnology. The journal invites submissions of manuscripts that are relevant and appropriate. It targets a wide audience, including scientists, engineers, students, instructors, researchers, practitioners, managers, governments, and other stakeholders in the field. Additionally, special issues are published based on selected presentations from recent relevant conferences in collaboration with the organizations hosting those conferences.
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