Behavior and characterization of titanium dioxide and silver nanoparticles in soils

Pachapur, Vinayak Laxman; Larios, Araceli Dalila; Cledón, Maximiliano; Brar, Satinder Kaur; Verma, Mausam P.; Surampalli, Rao Y.

doi:10.1016/j.scitotenv.2015.11.090

Cited by 109 publications

(44 citation statements)

References 85 publications

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“…Humic acids induce the aggregation of ENMs in the soil (Mashayekhi et al, 2012). The reviews by Grillo et al (2015) and Pachapur et al (2016) have provided crucial information pertaining to the interactions between ENMs and organic matter in various environmental media. The reviews suggest that ENMs such as TiO 2 have higher mobility in the mineral soil in comparison to soil rich in organic colloids.…”

Section: Soil Properties and Their Role In The Effects Of Enms In Plantsmentioning

confidence: 99%

Lessons learned: Are engineered nanomaterials toxic to terrestrial plants?

Reddy

Hernández-Viezcas

Peralta-Videa

et al. 2016

Science of The Total Environment

148

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The expansion of nanotechnology and its ubiquitous applications has fostered unavoidable interaction between engineered nanomaterials (ENMs) and plants. Recent research has shown ambiguous results with regard to the impact of ENMs in plants. On one hand, there are reports that show hazardous effects, while on the other hand, some reports highlight positive effects. This uncertainty whether the ENMs are primarily hazardous or whether they have a potential for propitious impact on plants, has raised questions in the scientific community. In this review, we tried to demystify this ambiguity by citing various exposure studies of different ENMs (nano-Ag, nano-Au, nano-Si, nano-CeO2, nano-TiO2, nano-CuO, nano-ZnO, and CNTs, among others) and their effects on various groups of plant families. After scrutinizing the most recent literature, it seems that the divergence in the research results may be possibly attributed to multiple factors such as ENM properties, plant species, soil dynamics, and soil microbial community. The analysis of the literature also suggests that there is a knowledge gap on the effects of ENMs towards changes in color, texture, shape, and nutritional aspects on ENM exposed plants.

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Section: Soil Properties and Their Role In The Effects Of Enms In Plantsmentioning

confidence: 99%

Lessons learned: Are engineered nanomaterials toxic to terrestrial plants?

Reddy

Hernández-Viezcas

Peralta-Videa

et al. 2016

Science of The Total Environment

148

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“…Numerous studies documented the differing physico-chemical and concomitant toxicological behavior of AgNP in dependence of the soil type. As a function of pH, ionic strength, temperature, amount of dissolved ions and of natural organic matter, oxygen concentration, grain size distribution and others [18][19][20][21], AgNP could undergo various physico-chemical transformations such as reduction, oxidation, aggregation, dissolution, complexation and further secondary reactions [21][22][23][24]. Consequently, these transformations in turn affect the toxicity mechanism of AgNP as well as their bioavailability.…”

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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“…Discharged nanoparticles (NPs) find their way into the soils during their manufacturing, transportation, application, and disposal (Pachapur et al, 2016), and soils and aquifers act as primary filter systems to remove particulate materials from percolating water and protect water resources (Kasel et al, 2013a;Liang et al, 2013a). Many previous studies have shown the negative effects of AgNPs on human health and the environment (e.g., He et al, 2011;Carbone et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Transport of silver nanoparticles in intact columns of calcareous soils: The role of flow conditions and soil texture

et al. 2018

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A B S T R A C TGrowing production of manufactured nanomaterials has increased the possibility of contamination of groundwater resources and soils by nanoparticles (NPs). It is crucial to study the fate of NPs in subsurface porous media in order to evaluate and control their risks to ecosystems and human health. Hence, this study was conducted to investigate the transport and retention of polyvinylpyrrolidone (PVP) stabilized silver nanoparticles (AgNPs, a diameter of 40 nm) under saturated and unsaturated conditions in intact columns of two calcareous sandy loam (TR) and loam (ZR) soils. Furthermore, similar experiments were conducted using sand quartz as a reference medium. A pulse of the AgNP suspension with an input concentration (C 0 ) of 50 mg L −1 was injected into the columns for 3 pore volumes. The transport of bromide (Br), as a non-reactive inert tracer, was also examined. High mobility of AgNPs was observed through the sand columns due to unfavorable conditions for AgNP deposition on the quartz sand surfaces. Nearly all AgNPs introduced into the columns of both soils were retained in the soil. Percentages of AgNPs leached out of the columns were < 1% of the total injected mass in both soils. Hyperexponential retention profiles (RPs) were observed in both soils and maximum concentrations of 100-130 mg kg −1 were determined near the columns' inlet. However, slightly stronger retention of AgNPs and greater maximum retained concentrations on the solid phase (S max ) in the ZR soil compared with the TR soil may be attributed to smaller grain sizes of the ZR soil. Hydrodynamic forces adjacent to the solid surfaces near the column inlet can provide a viable explanation for the hyperexponential shape of RPs. The one-site kinetic attachment model in HYDRUS-1D, which accounted for time-and depth-dependent retention, was successfully used to analyze the retention of AgNPs. The results showed that the degree of saturation had little effect on the mobility of AgNPs through undisturbed soil columns. Our results suggested the limited transport of AgNPs in neutral/alkaline calcareous soils under both saturated and unsaturated conditions.

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Behavior and characterization of titanium dioxide and silver nanoparticles in soils

Cited by 109 publications

References 85 publications

Lessons learned: Are engineered nanomaterials toxic to terrestrial plants?

Lessons learned: Are engineered nanomaterials toxic to terrestrial plants?

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

Transport of silver nanoparticles in intact columns of calcareous soils: The role of flow conditions and soil texture

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