Dose–response effects of silver nanoparticles and silver nitrate on microbial and enzyme activities in calcareous soils

Rahmatpour, Samaneh; Shirvani, Mehran; Mosaddeghi, Mohammad Reza; Nourbakhsh, Farshid; Bazarganipour, Mehdi

doi:10.1016/j.geoderma.2016.10.006

Cited by 91 publications

(39 citation statements)

References 32 publications

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“…4a). This confirmed the positive correlation between the grain size distribution of soils and the toxicity of AgNP as well as the association of high AgNP toxicity by more acidic soils [19,23,25]. In contrast, AgNO 3 caused a strong decrease of the entirety of the relative variation of the biological parameters in the clayey soil ( Fig.…”

Section: Soil Texturesupporting

confidence: 77%

“…The most distinct difference resulted from their grain size distributions of clay (45-65% vs. 25-35%) and sand (5-40% vs. 25-45%) ( Table 1). Actually, recent studies have shown a positive correlation between the clay content of soils and the toxicity of AgNP: lower grain size of soils resulted in lower toxicity of AgNP [19,23,25]. Indeed, this was appropriate for the sandy soil with a mean of 97.0% and the loamy soil with a mean of 99.4% relative abundance of all biological parameters (Additional file 1: Fig.…”

Section: Soil Texturementioning

confidence: 99%

“…Consequently, these transformations in turn affect the toxicity mechanism of AgNP as well as their bioavailability. For example, in comparative studies with different soil types, Schlich and Hund-Rinke [19] as well as Rahmatpour et al [25] showed that AgNP caused lower toxicity in soils with higher clay content due to the AgNP immobilization by heteroaggregation with clay particles [19,23,25].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Soil Texturesupporting

confidence: 77%

Section: Soil Texturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…In calcareous soils, the AgNPs transport may be affected by surface interactions with the carbonates. Moreover, our previous experiments that were conducted in a batch system for nine different calcareous soils (Rahmatpour et al, 2017) suggested significant and positive correlations between sorption isotherm parameters of AgNPs and pH due to the increased hydrolysis/precipitation of Ag + ions released from the PVP-AgNPs. In addition, using electrolyte solution [i.e., 6 mM Ca (NO 3 ) 2 ] and the presence of Ca 2+ in solution could affect the AgNPs behavior in our transport experiments.…”

Section: Transport and Retention Of Agnps Through Saturated And Unsatmentioning

confidence: 93%

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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“…The widespread and increasing production and use of AgNPs generate the concern of their release into environment (such as farmland, rivers, lakes, etc.) due to their toxicity to living organisms (Batista et al 2017, Rahmatpour et al 2017, Schlich et al 2017. In higher plants, they can cause membrane disruption (Farkas et al 2011, Wang et al 2017c, oxidative stress (through Fenton reactions) (Huang et al 2010, Li et al 20017), chromosomal aberrations, DNA mutations, DNA repair inhibition, DNA methylation (Ng et al 2010), cell death (Wan et al 2012, reduction of the growth and development (Jasim et al 2017), seed germination and seedling growth (Yin et al 2012, Vannini et al 2014, Zuverza-Mena et al 2016, Wang et al 2018a, plant transpiration (Gubbins et al 2011, Kim et al 2011, and enzyme activities (McGee et al 2017, Rahmatpour et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticles with different concentrations and particle sizes affect the functional traits of wheat

Wang¹,

Wu²,

Wei³

et al. 2020

Biol. plant.

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The response of functional traits of plants to external environment can influence their competitive ability because these functional traits are required for the acquisition of resources. The overuse of silver nanoparticles (AgNPs) has gained attention due to their environmental toxicity. This study aimed to examine the effects of AgNPs with different concentrations and particle sizes on functional traits of wheat. It was observed that AgNPs significantly reduced the plant height and so decrease its competitive ability. Ag ions decreased leaf chlorophyll and nitrogen content and specific leaf area more than AgNPs, but the opposite was true for leaf length, single leaf fresh mass, and shoot fresh mass. Hence, the toxicity of AgNPs may be higher than that of Ag ions in some cases. In this study, leaf chlorophyll and nitrogen content decreased with increasing concentration of AgNPs (with size 30 nm). The AgNPs with smaller particle size exerted higher toxicity on leaf chlorophyll and N content than those with larger particle size at the same concentration. However, AgNPs with larger particle size reduced more aboveground fresh mass than those with smaller particle size at the same concentration.

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Dose–response effects of silver nanoparticles and silver nitrate on microbial and enzyme activities in calcareous soils

Cited by 91 publications

References 32 publications

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

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

Silver nanoparticles with different concentrations and particle sizes affect the functional traits of wheat

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