Evaluation of charge and agglomeration behavior of TiO2 nanoparticles in ecotoxicological media

Nur, Yusuf; Lead, Jamie R.; Baalousha, Mohammed

doi:10.1016/j.scitotenv.2014.11.057

Cited by 61 publications

(38 citation statements)

References 48 publications

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“…The higher content of organic matter and its composition (a higher percentage of HA and FA) result in greater immobilization of contaminants (Ma et al 2011), which was also confirmed in our study. Furthermore, HA may adsorb on the surface of NPs (heteroaggregation), which may settle to the bottom of the channel faster and become less bioavailable and toxic (Deonarine et al 2011;Nur et al 2015). Additionally, the immobilization of nanoparticles by sediments (mainly, clays) may consist of electrostatic interaction between NPs and sediments.…”

Section: Discussionmentioning

confidence: 99%

The bioavailability and toxicity of ZnO and Ni nanoparticles and their bulk counterparts in different sediments

2016

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Purpose The intensive development of nanotechnology raises a question of the potential consequences of the presence of nanoparticles (NPs) in the different components of the environment, including sediments. The aim of this study was to evaluate the toxicity of nanoparticles of ZnO and Ni and their bulk counterparts in bottom sediments (SD1, SD2) with different properties collected from the Vistula River in Poland. Materials and methods Sediment samples with NPs at a concentration of 100 mg kg −1 were incubated for 17 months in the dark or under a photoperiod of 12 h light/12 h dark. The Microtox ® (bacteria, Vibrio fischeri) and OSTRACODTOXKIT F ™ (ostracods, Heterocypris incongruens) tests were used to evaluate toxicity. In addition, the contents of Zn and Ni were determined in extracts (H 2 O and CaCl 2 ) of the bottom sediments. Results and discussion The Zn concentration was much lower in the SD1 sediment with the addition of NPs/bulk particles (30-230 μg kg −1 ) compared to the SD2 sediment (280-1140 μg kg −1 ). The toxicity of ZnO and Ni was determined by the type of bottom sediment and the parameter studied.Both nano-and bulk-ZnO and Ni caused the mortality of H. incongruens at a level of 13.3-53.3 %. The influence of ZnO and Ni on the growth of H. incongruens was observed to be the opposite. ZnO resulted in growth stimulation, while Ni resulted in growth inhibition of H. incongruens. Both ZnO and Ni stimulated V. fisheri luminescence. In most cases, the incubation of ZnO and Ni under the photoperiod increased the toxicity or decreased the stimulation of V. fisheri bioluminescence and H. ingongruens growth compared to the darkincubated sediments. Conclusions The study provides new and important information on the ecotoxicological effects of ZnO and Ni nanoparticles in different sediments and under various environmental conditions that may be useful for the risk assessment of this new group of contaminants.

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Section: Discussionmentioning

confidence: 99%

The bioavailability and toxicity of ZnO and Ni nanoparticles and their bulk counterparts in different sediments

2016

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“…Cell membrane injury and complete destruction of the cells indicated that the binary NPtreated cells underwent a necrotic process, which in turn induced cell death. Several previous reports suggested that ROS generation induces damage to DNA (Dick et al, 2003;Olmedo et al, 2005;Yeo and Kang 2006). However, the damage is not only to the DNA, but also to the proteins, lipids and other metabolites in cells (Hirakawa et al, 2004;Tucci et al, 2013) during the TiO 2 photocatalysis.…”

Section: Transmission Electron Microscopymentioning

confidence: 98%

“…3) in addition to the agglomeration of NPs, and this in turn resulted in less bioavailability of TiO 2 NPs. Nur et al (2014) stated that the agglomeration of nanoparticles leads to the sedimentation of nanoparticles and in turn results in less bioavailability of NPs in the suspension, thereby altering the dose-response relationship in the toxicity analysis. Differences in the NP uptake were found to be statistically insignificant (p > 0.05) when comparing individual with binary mixture.…”

Section: Uptake/internalization Of Timentioning

confidence: 99%

Combined toxicity of two crystalline phases (anatase and rutile) of Titania nanoparticles towards freshwater microalgae: Chlorella sp

et al. 2015

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“…Although there are clear benets to the use of NPs, we have a limited understanding of what happens to them once they are inevitably released into the environment. [1][2][3] The increasing levels of NP production and use in consumer products have raised concerns about the environmental fates and ecological toxicity of NPs. [4][5][6] It was found that most TiO 2 NPs are discharged into sewage systems but some of the TiO 2 (10-100 mg L À1 ) remained in the secondary effluents following wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Anions influence the extraction of rutile nanoparticles from synthetic and lake water

et al. 2019

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Evaluation of charge and agglomeration behavior of TiO2 nanoparticles in ecotoxicological media

Cited by 61 publications

References 48 publications

The bioavailability and toxicity of ZnO and Ni nanoparticles and their bulk counterparts in different sediments

The bioavailability and toxicity of ZnO and Ni nanoparticles and their bulk counterparts in different sediments

Combined toxicity of two crystalline phases (anatase and rutile) of Titania nanoparticles towards freshwater microalgae: Chlorella sp

Anions influence the extraction of rutile nanoparticles from synthetic and lake water

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