Impact of metallic nanoparticles on anaerobic digestion: A systematic review

Zhu, Xun; Blanco, E. Gutiérrez; Bhatti, M.R.; Borrion, Aiduan

doi:10.1016/j.scitotenv.2020.143747

Cited by 64 publications

(43 citation statements)

References 130 publications

(186 reference statements)

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“…The introduction of metal admixtures, mainly iron and aluminum, into the filling’s structure allows improving the removal effectiveness of phosphates, which intensifies the processes of eutrophication and degradation of natural water bodies. Electrochemical corrosion processes are applied to this end [ 43 ]. In the wastewater environment, corrosive metals represent a source of ions that bind orthophosphates to insoluble forms and are directly responsible for reducing phosphorus concentration in the treated wastewater [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

Anaerobic Reactor Filling for Phosphorus Removal by Metal Dissolution Method

2022

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A commonly indicated drawback of anaerobic wastewater treatment is the low effectiveness of phosphorus removal. One possibility to eliminate this disadvantage is the implementation of active fillings that contain admixtures of metals, minerals, or other elements contributing to wastewater treatment intensification. The aim of the research was to present an active filling produced via microcellular extrusion technology, and to determine its properties and performance in anaerobic wastewater treatment. The influence of copper and iron admixtures on the properties of the obtained porous extrudate in terms of its functional properties was also examined. The Barus effect increased with the highest content of the blowing agent in the material from 110 ± 12 to 134 ± 14. The addition of metal powders caused an increase in the extrudate density. The modification of PVC resulted in the highest porosity, amounting to 47.0% ± 3.2%, and caused the tensile strength to decrease by about 50%. The determined values ranged from 211.8 ± 18.3 MPa to 97.1 ± 10.0 MPa. The use of the filling in anaerobic rectors promoted COD removal, intensified biogas production, and eliminated phosphorus with an efficiency of 64.4% to 90.7%, depending on the type of wastewater and applied technological parameters.

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Section: Resultsmentioning

confidence: 99%

Anaerobic Reactor Filling for Phosphorus Removal by Metal Dissolution Method

2022

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“…The authors also pointed out that iron-based nanoparticles have been generally observed to enhance biogas and methane production. Two assumptions are generally put forward for this: the corrosion of iron oxide NPs is suspected to provide sufficient amounts of essential iron in the form of Fe 2+ needed for the microbial proliferation; conductive (nano-Fe3O4) and semi-conductive (nano-Fe2O3) particles could serve as an electron donor to facilitate microbial interspecies electron transfer, a phenomenon known as electric syntrophy that boosts methanogenesis (Zhu et al, 2021).…”

Section: Nanoremediationmentioning

confidence: 99%

In situ nanoremediation of soils and groundwaters from the nanoparticle's standpoint: A review

Marcon

Oliveras

Puntes

2021

Science of The Total Environment

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Highlights Anthropogenic pollution has continuously increased since the industrial revolution.  Nanoparticles can provide solutions to in situ cleanup challenges.  Nano-objects are increasingly being deployed in the field since the 2000s.  Their use is not exempt of limitations (aggregation, human health risks). 5 Their slow development in Europe is also due to economic motives and regulatory issues.  Questions concerning toxicity and migration into the matrices need to be answered.Highlights (for review : 3 to 5 bullet points (maximum 85 characters including spaces per bullet point)

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“…One of the reported mechanisms for this affinity is that hydroxyl species are formed on iron surfaces, and this group is easily replaced by phosphate (Wen et al, 2014). Thus, this interaction can affect the process in two main ways: 1) modifying the surface structure and properties of nZVI, since adsorbed phosphate could combine with iron ions to form stable complexes, among which vivianite is one of the most common (Wen et al, 2014); and 2) affecting methanogenic activity since the aforementioned complexes could hinder the phosphorus uptake by methanogenic microorganisms (Zhu et al, 2021). Indeed, phosphate analysis should be necessary to really understand the efficiently of nZVI dosage in view to further experiments regarding dose optimization.…”

Section: Nps Morphology and Size Distribution After The Anaerobic Dig...mentioning

confidence: 99%