New sludge-based carbonaceous materials impregnated with different metals for anaerobic azo-dye reduction

Athalathil, Sunil; Font, Josep; Fortuny, A.; Bengoa, Christophe

doi:10.1016/j.jece.2014.07.002

Cited by 5 publications

(4 citation statements)

References 37 publications

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“…Impregnation of metals on CBM can also bring them other specific surface and chemical properties, that further enhance the catalytic performance of CBM (Athalathil et al ., 2014 ; Pereira et al ., 2017 ; Toral‐Sánchez et al ., 2018 ). An example of this favourable combination is the impregnation of metals, such as zinc (Zn), iron (Fe), nickel (Ni) and cobalt (Co), in sludge‐based carbonaceous (SBC) materials, obtained from the exhausted sludge (Athalathil et al ., 2014 , 2015 ). Furthermore, the impregnation of metals may increase the catalytic activity, once the metal particles increase the electroaffinities and the electronegativity of the composite.…”

Section: Carbon‐based Materials (And Nanomaterials) As Redox Mediatorsmentioning

confidence: 99%

“…Furthermore, the impregnation of metals may increase the catalytic activity, once the metal particles increase the electroaffinities and the electronegativity of the composite. The thermal treatment of SBC increased the composite S BET surface area, pore diameter and total pore volume, explaining the good catalytic reduction of Acid Organ 7 (AO7), as stated in Table S1 and Table S2 (Athalathil et al ., 2014 , 2015 ). In the work by Pereira et al .…”

Section: Carbon‐based Materials (And Nanomaterials) As Redox Mediatorsmentioning

confidence: 99%

“…The limitation of using these metals may be related to their individual toxicological so possibly also potentiating the toxicological effect of the composite. For instance, the low efficiency of the composite combining SCB and Co was related with the toxicity exerted on the anaerobic culture by Co, co‐inhibiting microbial growth (Athalathil et al ., 2015 ). The toxicity of cobalt nanoparticles, as observed for algae, is associated with the cation Co 2+ , when released to the medium (Chen et al ., 2018 ).…”

Section: Toxicity Associated With the Use Of Nanomaterialsmentioning

confidence: 99%

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Progress and prospects of applying carbon‐based materials (and nanomaterials) to accelerate anaerobic bioprocesses for the removal of micropollutants

Silva

Alves

Pereira

2021

Microbial Biotechnology

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Summary Carbon‐based materials (CBM), including activated carbon (AC), activated fibres (ACF), biochar (BC), nanotubes (CNT), carbon xenogels (CX) and graphene nanosheets (GNS), possess unique properties such as high surface area, sorption and catalytic characteristics, making them very versatile for many applications in environmental remediation. They are powerful redox mediators (RM) in anaerobic processes, accelerating the rates and extending the level of the reduction of pollutants and, consequently, affecting positively the global efficiency of their partial or total removal. The extraordinary conductive properties of CBM, and the possibility of tailoring their surface to address specific pollutants, make them promising as catalysts in the treatment of effluents containing diverse pollutants. CBM can be combined with magnetic nanoparticles (MNM) assembling catalytic and magnetic properties in a single composite (C@MNM), allowing their recovery and reuse after the treatment process. Furthermore, these composites have demonstrated extraordinary catalytic properties. Evaluation of the toxicological and environmental impact of direct and indirect exposure to nanomaterials is an important issue that must be considered when nanomaterials are applied. Though the chemical composition, size and physical characteristics may contribute to toxicological effects, the potential toxic impact of using CBM is not completely clear and is not always assessed. This review gives an overview of the current research on the application of CBM and C@MNM in bioremediation and on the possible environmental impact and toxicity.

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Section: Carbon‐based Materials (And Nanomaterials) As Redox Mediatorsmentioning

confidence: 99%

Section: Carbon‐based Materials (And Nanomaterials) As Redox Mediatorsmentioning

confidence: 99%

Section: Toxicity Associated With the Use Of Nanomaterialsmentioning

confidence: 99%

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Progress and prospects of applying carbon‐based materials (and nanomaterials) to accelerate anaerobic bioprocesses for the removal of micropollutants

Silva

Alves

Pereira

2021

Microbial Biotechnology

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“…It is estimated that about 100,000 different synthetic dyes and pigments are produced commercially, being that the azo dyes are an important class of environmental contaminants, corresponding 60-70 % of total production (Baêta et al 2015;Imran et al 2016). These dyes are also extensively employed in the textile industry and have a complex structure that contains one or more azo bonds (-N = N-), are hard to degrade in biological aerobic conditions and are also resistant into natural environments (Couto 2009;Athalathil et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Acid Blue 161: Decolorization and Toxicity Analysis After Microbiological Treatment

Almeida

Corso

2016

Water Air Soil Pollut

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Concern for the incorrect disposal of potentially toxic substances in aquatic environments is growing due to adverse effects caused to the organisms exposed to them. Synthetic azo dyes are part of this group of substances, and increasingly, researchers seek alternatives able to degrade and remove these molecules to prevent their discharge to the environment. Thus, this study sought to examine the dye removal capacity Acid Blue 161 by biosorption and biodegradation from filamentous fungi Aspergillus niger and Aspergillus terreus and perform acute toxicity tests with Lactuca sativa organisms and Artemia salina. The biossorption treatment resulted in 46 % decolorization of the solutions and reducing the toxicity of the means for both organisms tested. While the biodegradation study resulted in 84 % decolorization at the end of treatment. The resulting solution of such treatment did not show toxicity to the larvae of A. salina and the L. sativa seeds were increased by 40 % in the inhibition of root growth of seedlings. FTIR studies indicated the presence of amines in the middle, which justifies the increase in toxicity to seedlings, since these compounds are potentially toxic to a variety of organisms.

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Insoluble/immobilized redox mediators for catalyzing anaerobic bio-reduction of contaminants

Dai

Chen

et al. 2016

Rev Environ Sci Biotechnol

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New sludge-based carbonaceous materials impregnated with different metals for anaerobic azo-dye reduction

Cited by 5 publications

References 37 publications

Progress and prospects of applying carbon‐based materials (and nanomaterials) to accelerate anaerobic bioprocesses for the removal of micropollutants

Progress and prospects of applying carbon‐based materials (and nanomaterials) to accelerate anaerobic bioprocesses for the removal of micropollutants

Acid Blue 161: Decolorization and Toxicity Analysis After Microbiological Treatment

Insoluble/immobilized redox mediators for catalyzing anaerobic bio-reduction of contaminants

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