Engineered Nanoparticles in the Environments: Interactions with Microbial Systems and Microbial Activity

Eduok, Samuel; Coulon, Frédéric

doi:10.1007/978-3-319-61795-4_5

Cited by 8 publications

(3 citation statements)

References 138 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As with all surface treatments, HAp nanoparticles can be leached into the surrounding environment leading to potential ecotoxicity in the soil and water, with adverse effects on the associated biota and the bacteria-dependent processes [3]. Even though there is limited understanding of the environmental fate of engineered nanoparticles after release from treated surfaces, ecotoxicological studies reported different results of bacterial inhibition, stimulation, survival and death, which depend on dose, species and test procedures [37].…”

Section: Biological Evaluation Of the Antimicrobial Properties Of Obt...mentioning

confidence: 99%

Functional Nano-Hydroxyapatite for Applications in Conservation of Stony Monuments of Cultural Heritage

Capitelli

Dida

Ventura

et al. 2021

The 2nd International Online Conference on Crystals

View full text Add to dashboard Cite

Stony monuments must continuously be safeguarded from damage caused over time, in particular from the detrimental effects of weathering. One of the new environmentally-friendly (nano) materials for stone reinforcement, particularly suitable for marble and calcareous (limestone, sandstone) artifacts, is Ca10(PO4)6(OH)2 hydroxyapatite (HAp), which has a considerably lower dissolution rate and solubility compared to CaCO3 calcite (the building block of marble materials): thus, HAp has been proposed for the protection of calcareous monuments against acidic rain corrosion. Promising results have been obtained, but further optimization is necessary as the treated layer is often incomplete, cracked and/or porous. Several parameters need to be optimized, in this way a homogeneous layer can be obtained, and consequently the formation of metastable can be avoided, soluble phases instead of HAp. These include: the pH of the starting solution; the effect of organic and inorganic additions in particular, that of ethanol, which is known to adsorb calcite, thus possibly favoring the growth of the HAp layer. The formation of HAp nanoparticles and their application on stony substrates has been investigated by means of a multi-methodological approach based on scanning electron microscopy, x-ray diffraction, small- and/or wide-angle x-ray scattering, Fourier-transform infrared spectroscopy, and finally, in situ measurements of laser-induced breakdown spectroscopy and acid attack preliminary tests on stony substrates.

show abstract

Section: Biological Evaluation Of the Antimicrobial Properties Of Obt...mentioning

confidence: 99%

Functional Nano-Hydroxyapatite for Applications in Conservation of Stony Monuments of Cultural Heritage

Capitelli

Dida

Ventura

et al. 2021

The 2nd International Online Conference on Crystals

View full text Add to dashboard Cite

show abstract

“…There is limited understanding of the environmental fate of engineered nanoparticles (ENPs) after release from treated surfaces. Ecotoxicological studies report different results of bacterial inhibition, stimulation, survival and death, which depend on dose, species and test procedures [31].…”

Section: Ecotoxicological Consequences Of Release Of Nanoparticles Inmentioning

confidence: 99%

Antimicrobial engineered nanoparticles in the built cultural heritage context and their ecotoxicological impact on animals and plants: a brief review

et al. 2018

View full text Add to dashboard Cite

Nanoparticles (NPs) of metal oxides, sometimes referred to as engineered nanoparticles have been used to protect building surfaces against biofilm formation for many years, but their history in the Cultural Heritage world is rather short. Their first reported use was in 2010. Thereafter, a wealth of reports can be found in the literature, with Ti, Ag and Zn oxides being the major protagonists. As with all surface treatments, NPs can be leached into the surrounding environment, leading to potential ecotoxicity in soil and water and associated biota. Dissolution into metal ions is usually stated to be the main mode of toxic action and the toxic effects, when determined in the marine environment, decrease in the order Au > Zn > Ag > Cu > Ti > C 60 , but direct action of NPs cannot be ruled out. Although ecotoxicity has been assessed by a variety of techniques, it is important that a suitable standard test be developed and the European Unions's Biocidal Product Registration group is working on this, as well as a standard test for antimicrobial efficacy to determine their impact on ecological processes of surrounding non-target organisms and their transformation products under realistic scenarios.

show abstract

“…In wastewater treatment plants, biological treatments such as activated sludge can remove nano-CuO particles. However, the toxicity of NPs on the bacterial film of activated sludge interferes with the overall removal process by modifying the properties of sludge [ 10 , 11 ]. The membrane process can also effectively remove the NPs from water, but it is not commercially viable due to membrane fouling caused by highly concentrated NPs [ 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Synergetic Effect of Organic Flocculant and Montmorillonite Clay on the Removal of Nano-CuO by Coagulation-Flocculation-Sedimentation Process

et al. 2021

View full text Add to dashboard Cite

The widespread usage of nano-copper oxide particles (nano-CuO) in several industrial products and applications raises concerns about their release into water bodies. Thus, their elimination from drinking water is essential to reduce the risk to human health. This work investigated the removal of nano-CuO from pure water and montmorillonite clay (MC) suspensions using poly aluminum ferric chloride (PAFC) as well as cationic polyacrylamide (PAM) by the coagulation-flocculation-sedimentation (C/F/S) process. Moreover, the PAFC and PAFC/PAM flocculation performance for various nano-CuO particles concentrations, dosages, pH, settling times and stirring speeds were also investigated. The findings showed that the removal of nano-CuO and turbidity in MC suspension were higher as compared to pure water. Moreover, the combined effect of PAFC/PAM on the elimination of nano-CuO and turbidity was also substantially better than the individual use of PAFC or PAM. The efficient removal of CuO was observed in the solution containing higher mass concentration in the order (10 mg/L > 2.5 mg/L > 1 mg/L) with an increased coagulant dose. The improved removal performance of nano-CuO was observed in a pH range of 7–11 under various water matrices. The C/F/S conditions of nano-CuO were further optimized by the Box–Behnken statistical experiment design and response surface methodology. The PAFC/PAM dose resulted in the maximum removal of nano-CuO (10 mg/L) in both pure water (>97%) and MC suspension (>99%). The results of particle monitoring and Fourier transform infrared of composite flocs revealed that the main removal mechanism of nano-CuO may be the combined effect of neutralization, complexation as well as adsorption.

show abstract

Engineered Nanoparticles in the Environments: Interactions with Microbial Systems and Microbial Activity

Cited by 8 publications

References 138 publications

Functional Nano-Hydroxyapatite for Applications in Conservation of Stony Monuments of Cultural Heritage

Functional Nano-Hydroxyapatite for Applications in Conservation of Stony Monuments of Cultural Heritage

Antimicrobial engineered nanoparticles in the built cultural heritage context and their ecotoxicological impact on animals and plants: a brief review

Synergetic Effect of Organic Flocculant and Montmorillonite Clay on the Removal of Nano-CuO by Coagulation-Flocculation-Sedimentation Process

Contact Info

Product

Resources

About