A mini-review on mechanochemical treatment of contaminated soil: From laboratory to large-scale

Cagnetta, Giovanni; Huang, Jun; Yu, Gang

doi:10.1080/10643389.2018.1493336

Cited by 69 publications

(27 citation statements)

References 112 publications

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“…There have been many methods of Ni removal from solid matrices, but the most effective are those which are capable of removing/treating Ni before it emanates into the environment [ 219 ]. Several physico-chemical methods have been employed over the years for the removal of Ni from aqueous solutions [ 220 ].…”

Section: Bacillus Species and Heavy Metalsmentioning

confidence: 99%

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

2021

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The rise of anthropogenic activities has resulted in the increasing release of various contaminants into the environment, jeopardizing fragile ecosystems in the process. Heavy metals are one of the major pollutants that contribute to the escalating problem of environmental pollution, being primarily introduced in sensitive ecological habitats through industrial effluents, wastewater, as well as sewage of various industries. Where heavy metals like zinc, copper, manganese, and nickel serve key roles in regulating different biological processes in living systems, many heavy metals can be toxic even at low concentrations, such as mercury, arsenic, cadmium, chromium, and lead, and can accumulate in intricate food chains resulting in health concerns. Over the years, many physical and chemical methods of heavy metal removal have essentially been investigated, but their disadvantages like the generation of chemical waste, complex downstream processing, and the uneconomical cost of both methods, have rendered them inefficient,. Since then, microbial bioremediation, particularly the use of bacteria, has gained attention due to the feasibility and efficiency of using them in removing heavy metals from contaminated environments. Bacteria have several methods of processing heavy metals through general resistance mechanisms, biosorption, adsorption, and efflux mechanisms. Bacillus spp. are model Gram-positive bacteria that have been studied extensively for their biosorption abilities and molecular mechanisms that enable their survival as well as their ability to remove and detoxify heavy metals. This review aims to highlight the molecular methods of Bacillus spp. in removing various heavy metals ions from contaminated environments.

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Section: Bacillus Species and Heavy Metalsmentioning

confidence: 99%

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

2021

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“…A far more promising strategy in terms of the decomposition of fluorinated pollutants in solid matrices might be the application of ball milling. Although mechanochemistry (MC) was intensively studied with regard to the removal of chlorinated and brominated persistent organic pollutants (POPs), little is known about the mechanochemical impact on PFASs [ 103 , 104 , 105 ]. Until today, only few examples have been reported showing the chemical degradation of representative compounds—mainly PFOS and PFOA—in ball-milling chemistry.…”

Section: Mechanochemical Decomposition Of Pfass and Involved Reactmentioning

confidence: 99%

“…Cagnetta et al have summarized the previously attempted applications of ball milling as a means of remediation of POP-contaminated solids [ 105 ]. According to their investigation, large-scale ball mills performed their specific remediation tasks and competed well in terms of costs per m 3 of contaminated soil (76 USD/m 3 ), compared to state-of-the-art applications like incineration (914–1540 USD/m 3 ) or landfilling (200–340 USD/m 3 ).…”

Section: Future Prospect—applicability In Remediationmentioning

confidence: 99%

“…Furthermore, no solid information on matrix influences during MC defluorination reactions are available and limitations of milling systems, reaction conditions or efficiency of higher scale MC defluorination reactions are completely unknown. Cagnetta et al have summarized the previously attempted applications of ball milling as a means of remediation of POP-contaminated solids [105]. According to their investigation, large-scale ball mills performed their specific remediation tasks and competed well in terms of costs per m 3 of contaminated soil (76 USD/m 3 ), compared to state-of-the-art applications like incineration (914-1540 USD/m 3 ) or landfilling (200-340 USD/m 3 ).…”

Section: Future Prospect-applicability In Remediationmentioning

confidence: 99%

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Reductive Defluorination and Mechanochemical Decomposition of Per- and Polyfluoroalkyl Substances (PFASs): From Present Knowledge to Future Remediation Concepts

Roesch

Vogel

Simon

2020

IJERPH

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Over the past two decades, per- and polyfluoroalkyl substances (PFASs) have emerged as worldwide environmental contaminants, calling out for sophisticated treatment, decomposition and remediation strategies. In order to mineralize PFAS pollutants, the incineration of contaminated material is a state-of-the-art process, but more cost-effective and sustainable technologies are inevitable for the future. Within this review, various methods for the reductive defluorination of PFASs were inspected. In addition to this, the role of mechanochemistry is highlighted with regard to its major potential in reductive defluorination reactions and degradation of pollutants. In order to get a comprehensive understanding of the involved reactions, their mechanistic pathways are pointed out. Comparisons between existing PFAS decomposition reactions and reductive approaches are discussed in detail, regarding their applicability in possible remediation processes. This article provides a solid overview of the most recent research methods and offers guidelines for future research directions.

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“…More interestingly, some adsorbents that were used to capture organic pollutants can be also regenerated by simple high energy ball milling [7]. Indeed, organic pollutants undergo mineralization to graphitic and amorphous carbon during high energy milling [18,19]. This fact suggests that carbon-based materials, like carbides, might be easily regenerated by MC methods.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Regeneration of A MXene-Based Pollutant Adsorbent by Mechanochemical Methods

et al. 2019

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In the present study, an adsorbent material for removal of organic contaminants in wastewater is synthetized by a green and facile mechanochemical method. It is composed of Ti3C2Tx MXene layers (obtained by mechanochemical etching of MAX phase with concentrated HF) pillared with terephthalate by rapid direct reaction. Such material shows high specific surface area (135.7 m2 g−1) and excellent adsorption capability of methylene blue (209 mg g−1) because of the larger interlayer space among MXene sheets and free carboxylate groups of terephthalate. The spent adsorbent is reutilized (with addition of sole aluminum) to synthetize the MAX phase by mechanochemical procedure, where the terephthalate and the pollutant are carbonized into the carbide. In this way, new MXene-based adsorbent can be re-synthetized for further use.

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A mini-review on mechanochemical treatment of contaminated soil: From laboratory to large-scale

Cited by 69 publications

References 112 publications

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

Reductive Defluorination and Mechanochemical Decomposition of Per- and Polyfluoroalkyl Substances (PFASs): From Present Knowledge to Future Remediation Concepts

Synthesis and Regeneration of A MXene-Based Pollutant Adsorbent by Mechanochemical Methods

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