The ecotoxic potential of a new zero-valent iron nanomaterial, designed for the elimination of halogenated pollutants, and its effect on reductive dechlorinating microbial communities

Schiwy, Andreas; Maes, H; Koske, Daniel; Flecken, Mirkko; Schmidt, Kathrin R.; Schell, H.; Tiehm, Andreas; Kamptner, Andre; Thümmler, Silke; Stanjek, Helge; Heggen, Marc; Dunin-Borkowski, Rafal E.; Braun, J.; Schäffer, Andreas; Hollert, Henner

doi:10.1016/j.envpol.2016.05.051

Cited by 22 publications

(12 citation statements)

References 69 publications

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“…However, nZVI particles themselves are prone to agglomeration and sedimentation (Xue et al 2018;Liu et al 2014a). Traditional methods to combat agglomeration are to add surfactants (Tian et al 2018), and stabilizers (Schiwy et al 2016) to maintain the uniformity and activity of nZVI particles. Nevertheless, those auxiliary additives and contaminants adsorbed on nZVI may be released and can be a source of secondary pollution if not properly retrieved (Lefevre et al 2016).…”

Section: Nanofibers For Desalination and Water Treatmentmentioning

confidence: 99%

Nanofibers for Water and Wastewater Treatment: Recent Advances and Developments

Tijing

Yao

Ren

et al. 2018

Energy, Environment, and Sustainability

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Materials of nanofibrous morphology and structure are attractive for solving environmental problems including water-related issues. In recent years, increasing interest is geared on the use of specially designed electrospun nanofibers for water/wastewater treatment applications. The nanofibers can be used in the form of nonwoven structures, as stand-alone membranes, as support layer or as a surface modification layer that enables added functionality to a composite material. Continuous research has been carried out in optimizing the nanofiber membrane design and structure by manipulating material, process and surrounding parameters in the electrospinning process. This chapter highlights the recent advances and developments on the potential and application of electrospun nanofibers for water/ wastewater treatment. Comprehensive discussion is presented here on various designs and structures of nanofibers and their applications to water-related treatment and the future prospects of such materials.

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Section: Nanofibers For Desalination and Water Treatmentmentioning

confidence: 99%

Nanofibers for Water and Wastewater Treatment: Recent Advances and Developments

Tijing

Yao

Ren

et al. 2018

Energy, Environment, and Sustainability

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“…On the contrary, the expression of error-prone polymerase, a low fidelity DNA damage repairing enzyme, could enhance the mutation rate of bacteria, and might increase the frequency of the SCV phenotype [22]. While the oxidative stress-induced mutation likely explains the emergence of the irreversible SCV phenotype, there has been no reported mutagenicity effect of NZVI on bacterial cells [23]. Schiwy et al [23] studied the mutagenicity of aged Nanofer 25S and reported that no mutagenicity was observed due to low ROS generation.…”

Section: The Emergence Of the Scv Phenotype Is Induced By Nzvi-mediated Oxidative Stressmentioning

confidence: 99%

“…While the oxidative stress-induced mutation likely explains the emergence of the irreversible SCV phenotype, there has been no reported mutagenicity effect of NZVI on bacterial cells [23]. Schiwy et al [23] studied the mutagenicity of aged Nanofer 25S and reported that no mutagenicity was observed due to low ROS generation. Beside mutagenesis, the oxidative stress-induced expression of efflux pump and bacterial adaptation to membrane-active compounds have been reported to induce the cross-protection against aminoglycoside antibiotics [24,25].…”

Section: The Emergence Of the Scv Phenotype Is Induced By Nzvi-mediated Oxidative Stressmentioning

confidence: 99%

Characteristics of a small colony variant of Pseudomonas putida F1 emerged from repetitive exposure to nanoscale zerovalent iron

Kotchaplai¹,

Khan²,

Vangnai³

2021

ScienceAsia

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While nanoscale zero valent iron (NZVI) is a promising alternative for in situ remediation, its potential environmental impact is a major concern. Herein, irreversible small colony variant (SCV) of Pseudomonas putida F1, obtained from the repetitive exposure to NZVI, was firstly reported. This SCV phenotype exhibited several altered characteristics including slower growth rate or longer lag phase, loss of swimming ability, and reduced biofilm formation. Regardless of reversibility, the persistence to gentamicin was used to distinguish the phenotypic variant from the normal phenotype and to further explore factors affecting this occurrence. By the third cycles of the repetitive exposure to 0.1 and 0.5 g/l of NZVI, the frequency of the phenotypic variant increased by 67-and 342-times, in comparison to those of non-exposed cells, respectively. While the repetitive exposure to 0.5 g/l of Fe(II) also resulted in the rising of the gentamicin-persistent phenotype by 65-fold by the third cycle of exposure, the repetitive exposure to either oxidized NZVI or Fe(III) did not induce the phenotypic variant. These results suggest that the emergence of this phenotype appears to associate with the NZVI-mediated oxidative stress. Together, this study suggests that the exposure to NZVI could trigger the emergence of phenotypic variants which could result in an environmental fitness trade-off.

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“…114 Schiwy et al used a zero-valent iron nanomaterial to eliminate halogenated pollutants at contaminated sites and assessed the toxicity in anaerobic batch and column experiments. 115…”

Section: Sample Preparationmentioning

confidence: 99%