Advances in bioleaching as a sustainable method for metal recovery from e-waste: A review

Baniasadi, Mahsa; Vakilchap, Farzane; Bahaloo-Horeh, Nazanin; Mousavi, Seyyed Mohammad; Farnaud, Sébastien

doi:10.1016/j.jiec.2019.03.047

Cited by 199 publications

(90 citation statements)

References 94 publications

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“…The process described in Figure 15 depicts a clear advantage of using hybrid methods to recover copper and other metals. It is well in tandem with the assessment done on the environmental impact for base metal recovery from PCBs [49] making bioleaching the most sustainable method for metal recovery from PCBs. In addition to its environmental benefits, bioleaching requires less investment than conventional metal recovery methods [50].…”

Section: Solvent Extraction Of Pregnant Leach Liquor (Pls)mentioning

confidence: 96%

Microbial Processing of Waste Shredded PCBs for Copper Extraction Cum Separation—Comparing the Efficacy of Bacterial and Fungal Leaching Kinetics and Yields

Abhilash

Tabassum

Ghosh

et al. 2021

Metals

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The recycling of electronic scrap is an important subject not only from an environmental aspect but also for recovering metal resources such as copper. In this work, the microbial extraction of copper and other metals (Cu, Ni, Co, Fe and Al) present in the depopulated and shredded printed circuit board (PCB) is elaborated. Bacterial strains of A. ferrooxidans, A. thiooxidans and a fungal strain, A. niger are used for copper extraction along with other metals from shredded PCBs. An optimum metal recovery of 93% Cu was obtained at 308 K, pH 2 using 8% pulp density in 10 days by a mixed culture of A. ferrooxidans and A. thiooxidans. Whereas using A. niger, a metal recovery of 66% Cu was reported using similar experimental conditions. The results show the higher potential ability of bacteria as compared to fungus to bioleach copper. Additionally, the kinetics and mechanism of copper bioleaching from this e-waste by the chemolithotrophs and heterotrophs were evaluated. The leach liquor obtained from the optimized leaching process was subjected to separation and purification of copper as >99% pure copper sulfate using Acorga M5640 by solvent extraction.

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Section: Solvent Extraction Of Pregnant Leach Liquor (Pls)mentioning

confidence: 96%

Microbial Processing of Waste Shredded PCBs for Copper Extraction Cum Separation—Comparing the Efficacy of Bacterial and Fungal Leaching Kinetics and Yields

Abhilash

Tabassum

Ghosh

et al. 2021

Metals

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“…seek to reduce and upcycle electronic wastes by exploring heavy metal and rare earth element reclamation and recovery through engineered microbes. [164][165][166] Many of the research studies on environmental applications, such as alternative fuels, materials, or food production methods, face difficulty in translation into industrial processes or sustainable business models. To compete with the low cost of fossil-fuel-based products, significant technical advancement is necessary -for example, sourcing for cheaper, non-food feedstock that does not take up excessive land use, developing more cost-effective pretreatment methods of lignocellulose and other biomass, as mentioned above, and developing consolidated downstream processing technologies that can also exploit high-value byproducts.…”

Section: Future Medicinementioning

confidence: 99%

“…Since the discovery of the poly(ethylene terephthalate) (PET)‐degrading bacterium Ideonella sakaiensis and the two key enzymes in 2016, 161 there has been many efforts in evolving the enzymes for higher efficiency 162,163 . Apart from plastics pollution, synthetic biologists also seek to reduce and upcycle electronic wastes by exploring heavy metal and rare earth element reclamation and recovery through engineered microbes 164‐166 …”

Section: Synthetic Biology‐definition and Stakeholdersmentioning

confidence: 99%

Future trends in synthetic biology in Asia

et al. 2021

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Synthetic biology research and technology translation has garnered increasing interest from the governments and private investors in Asia, where the technology has great potential in driving a sustainable bio-based economy. This Perspective reviews the latest developments in the key enabling technologies of synthetic biology and its application in bio-manufacturing, medicine, food and agriculture in Asia. Asia-centric strengths in synthetic biology to grow the bio-based economy, such as advances in genome editing and the presence of biofoundries combined with the availability of natural resources and vast markets, are also highlighted. The potential barriers to the sustainable development of the field, including inadequate infrastructure and policies, with suggestions to overcome these by building public-private partnerships, more effective multilateral collaborations and well-developed governance framework, are presented. Finally, the roles of technology, education and regulation in mitigating potential biosecurity risks are examined. Through these discussions, stakeholders from different groups, including academia, industry and government, are expectantly better positioned to contribute towards the establishment of innovation and bioeconomy hubs in Asia.

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“…Some disadvantages of bioleaching include its slow process, difficult to control secondary reactions, and precipitation of lead, tin, and some other metals [122,130,131].…”

Section: Biometallurgical Processingmentioning

confidence: 99%

E-Wastes: Bridging the Knowledge Gaps in Global Production Budgets, Composition, Recycling and Sustainability Implications

Ghimire

Ariya

2020

Sustainable Chemistry

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Rapid urbanization, advancements in science and technology, and the increase in tech-savviness of consumers have led to an exponential production of a variety of electronic equipment. The global annual growth rate of e-waste volume exceeds the growth rate of the human population. Electronic waste has now become a point of concern globally (53.6 million metric tons, 2019). However, merely 17.4% of all global e-waste is properly collected and recycled. China is the largest contributor to the global production of e-waste (~19%), the second being the United States. Indeed, only 14 countries generated over 65% of global e-waste production in 2019. E-wastes contain a wide range of organic, and inorganic compounds including various metals. Emerging contaminants like plastics are amongst the fastest growing constituents of electronic waste. The current challenges include the lack of reliable data, inadequate identification and quantification of new emerging materials, limited effectiveness of current recycling technologies, need for cutting-edge detection and recycling technologies, and the lack of e-waste management policies and international collaboration. In this review, we strive to integrate the existing data on production rates at different spatial scales, composition, as well as health, economical, and environmental challenges, existing recycling technologies; explore tangible solutions; and encourage further sustainable technology and regulatory policies.

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Advances in bioleaching as a sustainable method for metal recovery from e-waste: A review

Cited by 199 publications

References 94 publications

Microbial Processing of Waste Shredded PCBs for Copper Extraction Cum Separation—Comparing the Efficacy of Bacterial and Fungal Leaching Kinetics and Yields

Microbial Processing of Waste Shredded PCBs for Copper Extraction Cum Separation—Comparing the Efficacy of Bacterial and Fungal Leaching Kinetics and Yields

Future trends in synthetic biology in Asia

E-Wastes: Bridging the Knowledge Gaps in Global Production Budgets, Composition, Recycling and Sustainability Implications

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