Different effects of nano-scale and micro-scale zero-valent iron particles on planktonic microorganisms from natural reservoir water

Nguyen, Nhung H. A.; Špánek, Roman; Kasalický, Vojtěch; Ribas, David López; Vlková, Denisa; Řeháková, Hana; Kejzlar, Pavel; Ševců, Alena

doi:10.1039/c7en01120b

Cited by 28 publications

(6 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These observational findings that nZVIs significantly reduce the toxicity and environmental impact of PCP are potentially very significant and additional studies were completed to more fully understand the mechanisms of action. 17 Interestingly, chlorophenols (CPs) analysis showed that without nematodes the degradation abilities of different ZVIs for PCP were comparable (Figure 1d), with the residual parent PCP concentrations ranging from 0.117 to 0.142 mmol/kg (31.1−37.9 mg/kg). This weakened nanoscale size effect of nZVIs has previously been reported in soil remediation studies and may be due to the homo-and heteroaggregation of nZVIs, with subsequent overall loss in reactivity.…”

Section: Resultsmentioning

confidence: 96%

“…Both before and after the 3 days of exposure, soil pH remained constant, but by the end of the exposure period, the increase in redox potention ( E h ) induced by PCP contamination was largely neutralized by nZVI 20 addition (Table S2). These observational findings that nZVIs significantly reduce the toxicity and environmental impact of PCP are potentially very significant and additional studies were completed to more fully understand the mechanisms of action …”

Section: Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Nano–Zoo Interfacial Interaction as a Design Principle for Hybrid Soil Remediation Technology

Hou

White

et al. 2021

ACS Nano

View full text Add to dashboard Cite

Using nanotechnology to remediate contaminated agricultural soil is promising but faces notable technical and economic challenges. Importantly, widely distributed soil invertebrates can potentially act as natural mobile facilitators for in situ nanoscale remediation of contaminated soil. Herein, we have drawn inspiration from nano–bio interaction and established a hybrid remediation framework using nanoscale zerovalent iron (nZVI) and nematodes for organochlorine-contaminated soil. Approximately 80% pentachlorophenol (PCP, initially 50 mg/kg) was synergistically degraded by nZVI and nematodes within 3 days. Mechanistically, exposure to nZVI stimulated the synthesis of reductive biomolecules (including collagen, glutathione, and l-cysteine) which acted as a bioreductive barrier and significantly mitigated the toxicity of PCP. At the microinterface, collagen distributed in the epidermis chelated nZVI; subsequently, l-cysteine and glutathione strongly accelerated nZVI-induced PCP dechlorination by facilitating the reductive dissolution of nZVI oxide shell and electron transfer from Fe0 core to PCP. On the basis of the interfacial interaction, an optimized soil remediation approach composed of nZVI, nematodes, and l-cysteine was established, demonstrating a 2.1-fold increase in removal efficiency with only 48.5% nZVI consumption compared with the nZVI treatment alone. This work provides a heuristic model for developing cost-efficient remediation technologies with the synergistic force of functional materials and indigenous biota, which may be widely applicable to a range of environmental contamination scenarios.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Results and Discussionmentioning

confidence: 99%

Nano–Zoo Interfacial Interaction as a Design Principle for Hybrid Soil Remediation Technology

Hou

White

et al. 2021

ACS Nano

View full text Add to dashboard Cite

show abstract

“…But frequently such conditions are short-lived (El-Temsah et al 2013), and oxygen will diffuse in from the border zones and re-establish oxygenated conditions and alleviate the stress caused by the reduced O 2 availability. For those organisms that have survived the period of reduced O 2 availability, the effects may be fully reversible, with no negative impacts on populations or communities (Nguyen et al 2018a). Thus, if the exposure ceases and the organism has avoided it or only passed through a period with sub-optimal living conditions (stress) due to the nanoparticle exposure, it is not appropriate to interpret this as toxicity.…”

Section: Endpoint Selectionmentioning

confidence: 99%

Ecotoxicity of Nanomaterials Used for Remediation

Coutris

Ševců

Joner

2020

Advanced Nano-Bio Technologies for Water and Soil Treatment

Self Cite

View full text Add to dashboard Cite

Remediation using nanoparticles depends on proper documentation of safety aspects, one of which is their ecotoxicology. Ecotoxicology of nanoparticles has some special features; while traditional ecotoxicology aims at measuring possible negative effects of more or less soluble chemicals or dissolved elements, nanoecotoxicology aims at measuring the toxicity of particles, and its main focus is on effects that are unique to nano-sized particles, as compared to larger particles or solutes. One of the main challenges when testing the ecotoxicity of nanoparticles lies in maintaining stable and reproducible exposure conditions, and adapting these to selected test organisms and endpoints. Another challenge is to use test media that are relevant to the matrices to be treated. Testing of nanoparticles used for remediation, particularly redox-active Fe-based nanoparticles, should also make sure to exclude confounding effects of altered redox potential that are not nanoparticle-specific. Yet another unique aspect of nanoparticles used for remediation is considerations of ageing of nanoparticles in soil or water, leading to reduced toxicity over field-relevant time scales. This review discusses these and other aspects of how to design and interpret appropriate tests and use these in hazard descriptions for subsequent risk assessments.

show abstract

“…From basic research in fields as disparate as evolutionary biology or the mechanisms of photosynthesis, to applied research on subjects from biofuel production to nuclear waste remediation, there is general interest in improving our basic understanding of bacteria and bacterial cultures. [1][2][3][4][5][6][7][8][9][10] In a variety of important situations, bacterial cultures in fluid media are optically thin or optically dilute systems such that light can be propagated into a culture and subsequently detected outside, all in the single scattering regime. This paper is about obtaining quantitative information from such mildly turbid systems, noninvasively and continuously.…”

Section: Introductionmentioning

confidence: 99%

Coupled Turbidity and Spectroscopy Problems: A Simple Algorithm for Volumetric Analysis of Optically Thin or Dilute, In Vitro Bacterial Cultures in Various Media

et al. 2020

View full text Add to dashboard Cite

An approach binary spectronephelometry (BSN) to perform real-time simultaneous noninvasive in situ physical and chemical analysis of bacterial cultures in fluid media is described. We choose to characterize cultures of Escherichia coli (NC), Pseudomonas aeruginosa (PA), and Shewanella oneidensis (SO) in the specific case of complex media whose Raman spectrum cannot be unambiguously assigned. Nevertheless, organism number density and a measure of the chemical makeup of the fluid medium can be monitored noninvasively, simultaneously, and continuously, despite changing turbidity and medium chemistry. The method involves irradiating a culture in fluid medium in an appropriate vessel (in this case a standard 1 cm cuvette) using a near infrared laser and collecting all the backscattered light from the cuvette, i.e., the Rayleigh–Mie line and the inelastically emitted light which includes unresolved Raman scattered light and fluorescence. Complex “legacy” media contain materials of biological origin whose chemical composition cannot be fully delineated. We independently calibrate this approach to a commonly used reference, optical density at 600 nm (OD600) for characterizing the number density of organisms. We suggest that the total inelastically emitted light could be a measure of the chemical state of a biologically based medium, e.g., lysogeny broth (LB). This approach may be useful in a broad range of basic and applied studies and enterprises that utilize bacterial cultures in any medium or container that permits optical probing in the single scattering limit.

show abstract

Different effects of nano-scale and micro-scale zero-valent iron particles on planktonic microorganisms from natural reservoir water

Abstract: This study compares the effect of nanoscale and microscale zerovalent iron on natural freshwater microplankton over 21 days.

Cited by 28 publications

References 81 publications

Nano–Zoo Interfacial Interaction as a Design Principle for Hybrid Soil Remediation Technology

Nano–Zoo Interfacial Interaction as a Design Principle for Hybrid Soil Remediation Technology

Ecotoxicity of Nanomaterials Used for Remediation

Coupled Turbidity and Spectroscopy Problems: A Simple Algorithm for Volumetric Analysis of Optically Thin or Dilute, In Vitro Bacterial Cultures in Various Media

Contact Info

Product

Resources

About