Metal-Containing Residues from Industry and in the Environment: Geobiotechnological Urban Mining

Glombitza, F.; Reichel, Susan

doi:10.1007/10_2013_254

Cited by 24 publications

(19 citation statements)

References 81 publications

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“…Bacterial species such as Pseudomonas, Bacillus, Rhizobium, Erwinia, Agrobacterium, Flavobacterium, Enterobacter, Micrococcus, Thiobacillus Acetobacter, Clavibacter, Serratia, and Streptomyces as well as some fungi such as Penicillium, Aspergillus, Rhizopus, and Fusarium have been found to be efficient in bioleaching processes using PSMs [89]. According to Glombitza and Reichel [90], mineral dissolution in bioleaching may proceed via one or several mechanisms which mainly include (a) complexation promoted dissolution (complexolysis), (b) proton promoted dissolution (acidolysis) and (c) redox reactions (redoxolysis). In these mechanisms, microorganisms produce metabolites by changing the pH of their surroundings and the formed metabolites form in turn complexes with the metals and therefore lead to their mobilization from solids (complexolysis).…”

Section: Bioleachingmentioning

confidence: 99%

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

et al. 2021

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The need for rare earths elements (REEs) in high tech electrical and electronic based materials are vital. In the global economy, deposits of natural REEs are limited except for countries such as China, which has prompted current attempts to seek alternative resources of REEs. This increased the dependence on major secondary rare earth-bearing sources such as scrap alloy, battery waste, spent catalysts, fly ash, spent magnets, waste light-emitting diodes (LEDs), and phosphogypsum (PG) for a substantial recovery of REEs for use. Recycling of REEs from these alternative waste sources through hydrometallurgical processes is becoming a sustainable and viable approach due to the low energy consumption, low waste generation, few emissions, environmentally friendliness, and economically feasibility. Industrial wastes such as the PG generated from the production of phosphoric acid is a potential secondary resource of REEs that contains a total REE concentration of over 2000 mg/kg depending upon the phosphate ore from which it is generated. Due to trace concentration of REEs in the PG (normally < 0.1% wt.) and their tiny and complex occurrence as mineral phases the recovery process of REE from PG would be highly challenging in both technology and economy. Various physicochemical pre-treatments approaches have been used up to date to up-concentrate REEs from PG prior to their extraction. Methods such as carbonation, roasting, microwave heating, grinding or recrystallization have been widely used for this purpose. This present paper reviews recent literature on various techniques that are currently employed to up-concentrate REs from PG to provide preliminary insight into further critical raw materials recovery. In addition, the advantages and disadvantages of the different strategies are discussed as avenues for realization of REE recovery from PG at a larger scale. In all the different approaches, recrystallization of PG appears to show promising advantages due to both high REE recovery as well as the pure PG phase that can be obtained.

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Section: Bioleachingmentioning

confidence: 99%

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

et al. 2021

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“…Bioleaching is basically accompanied by two different mechanisms of the interaction of the microorganism over metals i.e ., direct bacterial leaching and indirect bacterial leaching. The dissolution of the mineral is basically accompanied by one or several mechanisms, such as complexolysis, acidolysis and redoxolysis [ 98 ] depending on the type of the microorganism involved in the leaching process. Based on the favorable conditions the microorganism has to get adapted to the waste material to trigger the leaching efficiency.…”

Section: Bioleachingmentioning

confidence: 99%

Bioleaching: urban mining option to curb the menace of E-waste challenge

Arya

Kumar

2020

Bioengineered

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Resource Recovery from Waste Electronics has emerged as one of the most imperative processes due to its pressing challenges all over the world. The Printed Circuit Board (PCB) is one of the typical E-waste components that comprise large varieties of metals and nonmetals. Urban Mining of these metals has received major attention all over the world. The existing treatment procedures used extensively for the resource extraction are hydrometallurgy and pyro-metallurgy and crude recycling practices in the informal sector. However, these methods are prone to cause secondary pollutants with certain drawbacks. Also, the existing informal recycling procedures resulted in insignificant occupational health hazards and severe environmental threats. The application of biotechnology is extensively exploited for metal extraction and emerged as one of the sustainable and eco-friendly tools. However, a limited field-scale study is prevailing in the realm of resource recovery from E-waste using bioleaching method. Hence, the application of bioleaching requires more attention and technical know-how in developing countries to curtail crude practices. The application of bioleaching in E-waste, including its available methods, kinetics mechanism associated opportunities, and barriers, have been discussed in this paper. A glance of E-waste management in India and the menace of 95% crude E-waste recycling are also elaborated. The incentives toward profit, socio-economic, and environmentally sustainable approaches have been delineated based on critical analysis of the available literature.

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“…The growth of high concentrations of heavy metals in the soil will have a negative impact on crops, because these heavy metals can interfere with the metabolism of plants, including physiological and biochemical processes. Photosynthesis, respiration and degradation of major organelles, even leading to plant death, Excessive intake of metals by plants can cause toxicity in human nutrition and cause acute and chronic diseases [23]. High concentrations of metals in the soil often disrupt chemical balance and impair the function of individual ecosystems.…”

Section: Heavy Metal Pollution In Soilmentioning

confidence: 99%

Remediation of Heavy Metal Pollution in Soil by Microbial Immobilization with Carbon Microspheres

Section¹,

Meng²,

Huo³

et al. 2020

IJESD

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Cultivate resistant strains in soil contaminated with heavy metals, improve the survival rate of strains in microbial remediation, and use the interaction between resistant strains and contaminated soil to achieve the purpose of remediation of heavy metal pollution in soil. Using carbon microspheres as the carrier of bacterial strains, the bacterial strains were fixed reasonably and the survival rate was high, which was conducive to the formation of stable bacterial colonies and the reduction of heavy metal pollution.

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Metal-Containing Residues from Industry and in the Environment: Geobiotechnological Urban Mining

Cited by 24 publications

References 81 publications

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

Rare Earths’ Recovery from Phosphogypsum: An Overview on Direct and Indirect Leaching Techniques

Bioleaching: urban mining option to curb the menace of E-waste challenge

Remediation of Heavy Metal Pollution in Soil by Microbial Immobilization with Carbon Microspheres

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