Review on E-Waste Recycling: Part I—A Prospective Urban Mining Opportunity and Challenges

Mudali, U. Kamachi; Patil, Manisha; Saravanabhavan, R.; Saraswat, V. K.

doi:10.1007/s41403-021-00216-z

Cited by 19 publications

(5 citation statements)

References 10 publications

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“…Pulp denisty or amount of e-waste is another significant aspect that impacts the bioleaching potential of microorganism. As the concentration of e-waste increases, the amalgam of hazradous metals, inorganic pollutants in e-waste bacome toxic to microorganism and ceases the growth of micoorganism during bioleaching process and therefore reduce the production of lixiviant and metals solubilization significantly (Han et al 2022; Mudali et al 2021). These observations are based on the effect of one parameter at a time.…”

Section: Resultsmentioning

confidence: 99%

“…Oceania produces the least amount of electronic trash overall, at 0.7 Mt (Modoi and Mihai 2022; Pan et al 2022). This complex mixture of metallic components consumed the secondary raw material of approximately 57 billion USD, in which copper (Cu) and gold (Au) contributes majorly worth 10,960, and 9481 million USD, respectively (Arya and Kumar 2020; Mudali et al 2021). These significant quantities of valuable metals keep e-waste on priority in solid waste streams and become a hotspot among researchers and recycler units as well (Forti et al 2020; Kumar et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…E-waste is classified according to its type, source of development, content and the mechanism of its decomposition. Though, the most widely accepted definition of e-waste is ‘any item that uses a power source and has reached the end of its useful life’ (Mudali et al 2021). The short life span and upgrading of technology have been continuously increasing the quantum of e-waste by 2 Mt/annum and has currently reached 57.4 Mt (7.3 kg per person) worldwide and further anticipated to exceed 74.7 Mt by 2030 (Forti et al 2020).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exploring bioleaching potential of indigenous Bacillus sporothermodurans ISO1 for metals recovery from PCBs through sequential leaching process

Thakur

Kumar

2023

Waste Manag Res

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The low efficiency and selectivity limitations of biohydrometallurgy technique compel the researchers to explore novel microbial strains acclimated to metal existence site with higher toxicity tolerance and bioleaching capability in order to improve the role of bioleaching process for e-waste management. The current study aimed to explore bioleaching potential of indigenous Bacillus sporothermodurans ISO1; isolated from metal habituated site. The statistical approach was utilized to optimize a variety of culture variables including temperature, pH, glycine concentration and pulp density that impact bio-cyanide production and leaching efficiency. The highest dissolution of Cu and Ag, 78% and 37% respectively, was obtained at 40 °C, pH 8, glycine concentration 5 g L−1, and pulp density 10 g L−1 through One Factor at a Time (OFAT), which was further increased up to 95% Cu and 44% Ag recovery through the interactive effect of key factors in the Response Surface Methodology (RSM) approach. Furthermore, Chemo-biohydrometallurgy approach was utilized to overwhelm the specificity limitation; as higher concentration of Cu in computer printed circuit boards (CPCBs) causes interference to recover other metals. The sequential leaching through ferric chloride (FeCl3), recovered Cu prior to bio-cyanidation by B. sporothermodurans ISO1 and resulted in the improved leaching of Ag (57%), Au (67%), Pt (60%), etc. The current work reports on B. sporothermodurans ISO1, a new Bacillus strain that exhibits highest toxicity tolerance (EC50 = 425 g L−1) than earlier reported stains and has higher leaching potential that can be implemented to large-scale biometallurgical process for e-waste treatment to achieve the agenda of sustainable development goal (SDG) under the strategies of urban mining.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exploring bioleaching potential of indigenous Bacillus sporothermodurans ISO1 for metals recovery from PCBs through sequential leaching process

Thakur

Kumar

2023

Waste Manag Res

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“…Environmental problems in their production from ore, national policies and limited resources have resulted in increasing the number of studies about the recycling of REEs from secondary sources. [1][2][3][4][5][6][7] Neodymium iron boron (NdFeB) magnets are considered as a valuable secondary source for REEs (Nd, Pr, Dy, Tb) due to the high content of REEs. About 25% of REEs produced worldwide have been utilized in the production of NdFeB which is used in various high-tech products including electronic devices, wind turbines and electric bicycles and industrial engines.…”

Section: Introductionmentioning

confidence: 99%

Production of rare earth element oxide powders by solution combustion: a new approach for recycling of NdFeB magnets

et al. 2022

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“…Mankind's exploitation of earth resources is climbing out of their self-interests, and overexploitation has led to the depletion of numerous non-renewable resources [3,4]. The biggest constraint on human development is no longer science and technology itself [5], but how to make more scientific utilization of resources to maintain a harmonious relationship with the natural environment under sustainable development.…”

Section: Introductionmentioning

confidence: 99%

Optimal Scheduling of Electrical Energy Systems Using a Fluid Dynamic Analogy

Wang¹,

Wang²,

Liu³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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The electricity-gas transformation problem and related intrinsic mechanisms are considered. First, existing schemes for the optimization of electricity-gas integrated energy systems are analyzed through consideration of the relevant literature, and an Electricity Hub (EH) for electricity-gas coupling is proposed. Then, the distribution mechanism in the circuit of the considered electricity-gas integrated system is analyzed. Afterward, a mathematical model for the natural gas pipeline is elaborated according to the power relationship, a node power flow calculation method, and security requirements. Next, the coupling relationship between them is implemented, and dedicated simulations are carried out. Through experimental data, it is found that after 79 data iterations, the optimization results of power generation and gas purchase cost in the new system converge to $54,936 in total, which is consistent with the data obtained by an existing centralized optimization scheme. However, the new proposed optimization scheme is found to be more flexible and convenient.

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Review on E-Waste Recycling: Part I—A Prospective Urban Mining Opportunity and Challenges

Cited by 19 publications

References 10 publications

Exploring bioleaching potential of indigenous Bacillus sporothermodurans ISO1 for metals recovery from PCBs through sequential leaching process

Exploring bioleaching potential of indigenous Bacillus sporothermodurans ISO1 for metals recovery from PCBs through sequential leaching process

Production of rare earth element oxide powders by solution combustion: a new approach for recycling of NdFeB magnets

Optimal Scheduling of Electrical Energy Systems Using a Fluid Dynamic Analogy

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