Microbial leaching of heavy metals from e-waste

Gopikrishnan, V.; Vignesh, A.; Radhakrishnan, Manikkam; Joseph, Jerrine; Shanmugasundaram, Thangavel; Doble, Mukesh; Balagurunathan, Ramasamy

doi:10.1016/b978-0-12-817951-2.00010-9

Cited by 15 publications

(7 citation statements)

References 117 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the past decades, bioleaching has quickly developed and is used to recover metals from ores in the mining industry. So far, bioleaching has been applied to extract zinc (Zn), cobalt (Co), copper (Cu), nickel (Ni), lead (Pb), gold (Au), and arsenic (As) from minerals in the industry [102,103]. For example, bioleaching of copper can achieve a higher than 90% recovery rate, and each year approximately 20% of global copper is produced through bioleaching [104].…”

Section: Bioleachingmentioning

confidence: 99%

A Review of Tungsten Resources and Potential Extraction from Mine Waste

2021

View full text Add to dashboard Cite

Tungsten is recognized as a critical metal due to its unique properties, economic importance, and limited sources of supply. It has wide applications where hardness, high density, high wear, and high-temperature resistance are required, such as in mining, construction, energy generation, electronics, aerospace, and defense sectors. The two primary tungsten minerals, and the only minerals of economic importance, are wolframite and scheelite. Secondary tungsten minerals are rare and generated by hydrothermal or supergene alteration rather than by atmospheric weathering. There are no reported concerns for tungsten toxicity. However, tungsten tailings and other residues may represent severe risks to human health and the environment. Tungsten metal scrap is the only secondary source for this metal but reprocessing of tungsten tailings may also become important in the future. Enhanced gravity separation, wet high-intensity magnetic separation, and flotation have been reported to be successful in reprocessing tungsten tailings, while bioleaching can assist with removing some toxic elements. In 2020, the world’s tungsten mine production was estimated at 84 kt of tungsten (106 kt WO3), with known tungsten reserves of 3400 kt. In addition, old tungsten tailings deposits may have great potential for exploration. The incomplete statistics indicate about 96 kt of tungsten content in those deposits, with an average grade of 0.1% WO3 (versus typical grades of 0.3–1% in primary deposits). This paper aims to provide an overview of tungsten minerals, tungsten primary and secondary resources, and tungsten mine waste, including its environmental risks and potential for reprocessing.

show abstract

Section: Bioleachingmentioning

confidence: 99%

A Review of Tungsten Resources and Potential Extraction from Mine Waste

2021

View full text Add to dashboard Cite

show abstract

“…Many microorganisms are applied for metal recovery, especially those isolated from mining sites, including autotrophic and heterotrophic organisms ( Gopikrishnan et al, 2020 ). Among autotrophs, iron- and sulphur-oxidizing bacteria, particularly bacteria from the genera Acidithiobacillus and Leptospirillum , are widely studied and reported to play a significant role in bioleaching, especially in acidic conditions ( Gopikrishnan et al, 2020 ; Valix, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…Regarding heterotrophic bacteria, there are few available reports; of those, the genera Bacillus and Pseudomonas are introduced as the most heterotrophic strains used in bioleaching of various metals. These bacteria consume organic carbon and secrete organic acids that help metal solubilization ( Gopikrishnan et al, 2020 ; Valix, 2017 ). Since these are neutrophilic bacteria, their optimal growth pH is between 5 and 9 ( Jin and Kirk, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

“…Bioleaching is a promising technology for bioremediation that uses capable microorganisms to recover various metals from different minerals and waste materials, including e-waste, through microbial solubilization of metals ( Gopikrishnan et al, 2020 ). Although bioleaching has been performed since prehistoric times, its application in metal recovery from e-waste is still emerging ( Valix, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Remediation of metals and plastic from e-waste by iron mine indigenous acidophilic bacteria

et al. 2022

View full text Add to dashboard Cite

The growing consumption of electrical and electronic equipment leads to high amounts of electronic waste (e-waste), which is now considered the fastest-growing waste stream at the national and international levels. As well as being a potential secondary resource due to its precious metals content, e-waste also contains strategic metals and plastics. For instance, mobile phones have about 25–55% plastic substances. A few studies have been performed to investigate the potential of indigenous bacteria in metals’ bioleaching from the polluted environment. Heterotrophic bioleaching potential in acidic conditions had been preliminarily investigated. Two soil types of iron ore were considered the source of indigenous bacteria. Despite the acidophilic nature of the bacterial consortium, they continued their leaching activity regardless of alkaline conditions. Maximum biorecovery rate related to copper (4%) responding to the main soil, owing to the higher copper content of mobile phone waste. Chromium had the least recovery rate (⩽0.002%). Overall, the maximum metal recovery rate was 4.7%, achieved by tailing heterotrophs at an e-waste loading of 10 g l−1. Statistical analysis had shown that there was no significant difference between the metal recovery rates and soil type or even the solid-liquid ratio ( p > 0.05). Although acidophilic indigenous heterotrophs could not be an appropriate alternative for a large amount of metal recovery process, they might have considerable potential in the bioremediation of e-waste plastic fractions and metals in low concentrations simultaneously.

show abstract

“…Advances in molecular biology techniques and their applications in biosynthesis to detect and identify organisms have expanded our understanding of the interactions of metallic microbes and their important role in metal extraction and recovery [14]. This provides a good impetus for the industrial application of heavy metals from biological leaching of tailings.…”

Section: Introductionmentioning

confidence: 99%

Progress, Challenges, and Perspectives of Bioleaching for Recovering Heavy Metals from Mine Tailings

Gao¹,

Jiang

Mao

et al. 2021

Adsorption Science & Technology

View full text Add to dashboard Cite

The accumulation of mine tailings on Earth is a serious environmental challenge. The importance for the recovery of heavy metals, together with the economic benefits of precious and base metals, is a strong incentive to develop sustainable methods to recover metals from tailings. Currently, researchers are attempting to improve the efficiency of metal recovery from tailings using bioleaching, a more sustainable method compared to traditional methods. In this work, the research status of using biological leaching technologies to recover heavy metals from tailings was reviewed. Furthermore, CiteSpace 5.7.R2 was used to visually analyze the keywords of relevant studies on biological leaching of tailings to intuitively establish the current research hotspots. We found that current research has made recent progress on influencing factors and microbial genetic data, and innovations have also been made regarding the improvement of the rate of metal leaching by biological leaching combined with other technologies. This is of great significance for the development of bioleaching technologies and industrial production of heavy metals in tailings. Finally, challenges and opportunities for bioleaching provide directions for further research by the scientific community.

show abstract

Microbial leaching of heavy metals from e-waste

Cited by 15 publications

References 117 publications

A Review of Tungsten Resources and Potential Extraction from Mine Waste

A Review of Tungsten Resources and Potential Extraction from Mine Waste

Remediation of metals and plastic from e-waste by iron mine indigenous acidophilic bacteria

Progress, Challenges, and Perspectives of Bioleaching for Recovering Heavy Metals from Mine Tailings

Contact Info

Product

Resources

About