The fate of silver nanoparticles in soil solution — Sorption of solutes and aggregation

Klitzke, Sondra; Metreveli, George; Peters, André; Schaumann, Gabriele E.; Lang, Friederike

doi:10.1016/j.scitotenv.2014.10.108

Cited by 141 publications

(70 citation statements)

References 26 publications

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“…This could possibly be related to lower aggregation of the NPs in the lower concentrations (with increased dissolution or higher number of single NPs) and hence higher toxicity, as described for other metallic NPs in aquatic media, such as Cu , Ag , and Ni . In a soil study, Klitze et al also showed that higher concentrations of Ag NPs formed larger aggregates in soil solution than lower concentrations. These considerations can partly be supported by the present results, where the 100 and 320 mg Ni/kg soil of Ni NPs initially had 5 to 6 times higher soil porewater concentrations than the higher Ni NP concentrations.…”

Section: Discussionmentioning

confidence: 93%

Hazard assessment of nickel nanoparticles in soil—The use of a full life cycle test with Enchytraeus crypticus

Santos

Gomes

Scott-Fordsmand

et al. 2017

Enviro Toxic and Chemistry

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Nanoparticles (NPs) such as nickel (Ni) are widely used in several applications. Nevertheless, the environmental effects of Ni NPs are still poorly understood. In the present study, the toxicity of Ni NPs and nickel nitrate (NiNO ) was assessed using the standard test species in soil ecotoxicology, Enchytraeus crypticus (Oligochaeta), in a full life cycle test, adding the endpoints hatching, growth, and time to reach maturity, besides survival and reproduction as in the standard Organisation for Economic Co-operation and Development Guideline 220 and/or International Organization for Standardization 16387. For Ni NPs, the Ni in soil and in soil solution was concentration- and time-dependent, with a relatively higher soil solution content in the lower and shorter exposure concentrations and times. Overall, NiNO was more toxic than Ni NPs, and toxicity seemed to occur via different mechanisms. The former caused reduced hatching (50% effect concentration [EC50] = 39 mg Ni/kg soil), and the negative effects remained throughout the life cycle, in all measured endpoints (growth, maturation, survival, and reproduction). For Ni NPs, hatching was the most sensitive endpoint (EC50 = 870 mg Ni/kg soil), although the organisms recovered; that is, additional endpoints across the life cycle showed that this effect corresponded to a delay in hatching because organisms survived and reproduced at concentrations up to 1800 mg Ni/kg soil. On the other hand, the lowest tested concentration of Ni NPs (100 mg Ni/kg soil) caused reproduction effects similar to those at higher concentrations (1000 and 1800 mg Ni/kg soil). The present results show that the potential implications of a nonmonotonic dose response should be considered when assessing the risks of Ni NP exposure in soil. Environ Toxicol Chem 2017;36:2934-2941. © 2017 SETAC.

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Section: Discussionmentioning

confidence: 93%

Hazard assessment of nickel nanoparticles in soil—The use of a full life cycle test with Enchytraeus crypticus

Santos

Gomes

Scott-Fordsmand

et al. 2017

Enviro Toxic and Chemistry

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“…Heteroaggregation is likely to be very important in soils, as in aquatic environments, because soil porewaters often contain higher concentrations of natural colloids in suspension. Numerous studies have observed strong heteroaggregation of NMs with soil colloids (Cornelis et al 2010(Cornelis et al , 2011(Cornelis et al , 2012Hotze et al 2010;Huynh et al 2012;Hoppe et al 2015;Klitzke et al 2015;Labille et al 2015;Smith et al 2015), which has significant implications for limiting NM transport through soils because straining will be enhanced ( Figure 5). On the other hand, the presence of NOM in soil porewaters has often been found to stabilize NMs and inhibit both homo-and heteroaggregation (Praetorius et al 2014).…”

Section: Fate and Behavior In Terrestrial Systemsmentioning

confidence: 99%

Nanomaterials in the environment: Behavior, fate, bioavailability, and effects—An updated review

Lead

Batley

Alvarez

et al. 2018

Enviro Toxic and Chemistry

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The present review covers developments in studies of nanomaterials (NMs) in the environment since our much cited review in 2008. We discuss novel insights into fate and behavior, metrology, transformations, bioavailability, toxicity mechanisms, and environmental impacts, with a focus on terrestrial and aquatic systems. Overall, the findings were that: 1) despite substantial developments, critical gaps remain, in large part due to the lack of analytical, modeling, and field capabilities, and also due to the breadth and complexity of the area; 2) a key knowledge gap is the lack of data on environmental concentrations and dosimetry generally; 3) substantial evidence shows that there are nanospecific effects (different from the effects of both ions and larger particles) on the environment in terms of fate, bioavailability, and toxicity, but this is not consistent for all NMs, species, and relevant processes; 4) a paradigm is emerging that NMs are less toxic than equivalent dissolved materials but more toxic than the corresponding bulk materials; and 5) translation of incompletely understood science into regulation and policy continues to be challenging. There is a developing consensus that NMs may pose a relatively low environmental risk, but because of uncertainty and lack of data in many areas, definitive conclusions cannot be drawn. In addition, this emerging consensus will likely change rapidly with qualitative changes in the technology and increased future discharges.

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“…The exact extent of the release is unknown due to missing reliable and robust analytical methods for detecting trace concentrations of AgNP in complex matrices [7]. Thus, several scientists modeled the fate and concentrations of AgNP in the environment and named the soil compartment as one of the main sink of AgNP released into the environment [2,6,[8][9][10][11][12][13][14]. For Europe, an annual AgNP increase of 0.6 t and 2.09 t was calculated for soils and sediments, respectively [8].…”

Section: Introductionmentioning

confidence: 99%

Impact of silver nanoparticles (AgNP) on soil microbial community depending on functionalization, concentration, exposure time, and soil texture

et al. 2019

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Background: Increasing exposure to engineered inorganic nanoparticles takes actually place in both terrestric and aquatic ecosystems worldwide. Although we already know harmful effects of AgNP on the soil bacterial community, information about the impact of the factors functionalization, concentration, exposure time, and soil texture on the AgNP effect expression are still rare. Hence, in this study, three soils of different grain size were exposed for up to 90 days to bare and functionalized AgNP in concentrations ranging from 0.01 to 1.00 mg/kg soil dry weight. Effects on soil microbial community were quantified by various biological parameters, including 16S rRNA gene, photometric, and fluorescence analyses.Results: Multivariate data analysis revealed significant effects of AgNP exposure for all factors and factor combinations investigated. Analysis of individual factors (silver species, concentration, exposure time, soil texture) in the unifactorial ANOVA explained the largest part of the variance compared to the error variance. In depth analysis of factor combinations revealed even better explanation of variance. For the biological parameters assessed in this study, the matching of soil texture and silver species, and the matching of soil texture and exposure time were the two most relevant factor combinations. The factor AgNP concentration contributed to a lower extent to the effect expression compared to silver species, exposure time and physico-chemical composition of soil. Conclusions:The factors functionalization, concentration, exposure time, and soil texture significantly impacted the effect expression of AgNP on the soil microbial community. Especially long-term exposure scenarios are strongly needed for the reliable environmental impact assessment of AgNP exposure in various soil types. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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The fate of silver nanoparticles in soil solution — Sorption of solutes and aggregation

Cited by 141 publications

References 26 publications

Hazard assessment of nickel nanoparticles in soil—The use of a full life cycle test with Enchytraeus crypticus

Hazard assessment of nickel nanoparticles in soil—The use of a full life cycle test with Enchytraeus crypticus

Nanomaterials in the environment: Behavior, fate, bioavailability, and effects—An updated review

Impact of silver nanoparticles (AgNP) on soil microbial community depending on functionalization, concentration, exposure time, and soil texture

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