Retention of silver nano-particles and silver ions in calcareous soils: Influence of soil properties

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

doi:10.1016/j.jenvman.2017.01.062

Cited by 19 publications

(8 citation statements)

References 41 publications

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“…The reduced sorption of both AgNPs and Ag + ions at higher concentrations is consistent with other studies (Klitzke et al, 2015; Rahmatpour et al, 2017; Wang et al, 2018) and is likely due to saturation of binding sites in soil (Robinson et al, 2009). This mechanism may explain the significantly higher sorption of AgNPs compared with Ag + ions in our study.…”

Section: Resultssupporting

confidence: 90%

“…These differences may be due to coating of the AgNPs, our study used trisodium citrate, whereas Wang et al (2018) used PVP. Similarly, Rahmatpour et al (2017) reported that PVP AgNPs had similar sorption properties to Ag + ions in four calcareous soils. Differences in the surface chemistry of the AgNPs may have led to differences in specific adsorption processes and highlights the importance of the surface coating on the environmental fate of nanoparticles in general (Klitzke et al, 2015).…”

Section: Resultsmentioning

confidence: 78%

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The Mobility of Silver Nanoparticles and Silver Ions in the Soil‐Plant System

et al. 2019

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The widespread use of silver nanoparticles (AgNPs) as a bactericide will ultimately result in their increased concentration in soils. We sought to determine the likely mobility, toxicity, and plant uptake of Ag applied to soil as either AgNPs or Ag + . We measured the solubility, toxicity, and plant uptake of both AgNPs and Ag + in an immature Pallic soil, a Templeton loamy silt (pH = 5.1), and a granular silt loam (pH = 6.0). The sorption of AgNPs by the test soils was significantly greater than Ag + , and both moieties were more strongly sorbed at lower concentrations and higher pH values. Between pH 4 and 8, distribution coefficient (K D ) values increased from <10 up to ?500 L kg −1 for Ag + , and from 100 to 10,000 L kg −1 for AgNPs. There was strong evidence that our citrate-coated AgNPs were transformed into Ag + during the course of the plant growth experiments, and plant responses were similar for both the Ag + and AgNP treatments. Soil concentrations >100 mg kg −1 significantly reduced the biomass of Lolium perenne L. and resulted in foliar concentrations of up to 10 mg kg −1 dry matter. At a soil concentration of 70 mg kg −1 , silverbeet [Beta vulgaris L. ssp. maritima (L.) Arcang.] and spinach (Spinacia oleracea L.) accumulated 5 to 10 mg Ag kg −1 , which may present a human health risk. Regarding citrate-coated AgNPs, the environmental impact of release is largely determined by the equivalent mass concentration of Ag + , into which they will ultimately transform. Given the widespread interest in AgNPs, there is limited knowledge on the behavior of Ag + in soil and this should be the subject of future research.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 78%

The Mobility of Silver Nanoparticles and Silver Ions in the Soil‐Plant System

et al. 2019

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“…In other experiments, during the evaluation of soils that were spiked with ionic Ag (AgNO 3 ) and polyvinyl pyrrolidone (AgNP‐PVP) coated Ag nanoparticles, no adverse effects on soil physicochemical properties were observed (Topuz & van Gestel, ). However, Rahmatpour, Shirvani, and Mosaddeghi () showed that the retention of PVP‐AgNPs and Ag(I) ions was positively correlated to clay and organic carbon (OC) contents as well as electrical conductivity (EC), pH, and cation exchange capacity (CEC) of the calcareous soils. These results agree with Pachapur et al (), who argued that TiO 2 and Ag ENP undergo alteration in different properties such as dissolution, corrosion, redox reaction, and coatings with the soil matrix; their mobility was better across mineral soil compared to a high organic colloid soil.…”

Section: Resultsmentioning

confidence: 99%

Effect of engineered nanoparticles on soil biota: Do they improve the soil quality and crop production or jeopardize them?

et al. 2020

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Nanoscience and nanotechnology have been shown to have the capacity to help study, manipulation,design, and synthesis of new nano-sized materials to manufacture new products with desirable features never seen before. The unique properties of materials at nanoscale opens an excellent possibility for nanotechnology to be used in soil environmental remediation, and water, and air decontamination. In crop management, nanomaterials are used to regulate the controlled release of nutrients, fertilizers, and pesticides. However, it is not only necessary to expose the positive effects by the application of the nanomaterials but also to demonstrate the impacts on soil and nontarget organisms (plants, mesofauna, macrofauna, and soil microbiota). In this context, pieces of evidence on the adverse effects of engineered nanoparticles (ENP) on the physicochemical and biological properties of soils are discussed in this paper. We have found a diversity of contradictory results. The summaries, findings, and conclusions of most of the investigations support the need to understand the biological or physicochemical transformation and transport of ENP in soil, and in the plant-organism relationship. Better understanding regarding the soil biota coupled with the ecological ENP behavior could ensure the safe use of ENP. Nanomaterials can change the physicochemical and biological properties of the soils; consequently, long-term in situ field trials are required, and meanwhile, land-application of nanomaterials should be limited to scientific experiments to fill knowledge gaps to not jeopardize the global food production or the environment and worldwide human health.

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“…With its almost instant bactericidal effect against A. baumannii at very low concentrations, AgNZ could be applied in contaminated soils without negative impact on native bacterial populations. Furthermore, Ag cations stick to negatively charged soil particles ( 23 ), which minimises the possibility of their further leaching from soil, migration into groundwater, and toxic effects in the environment.…”

Section: Resultsmentioning

confidence: 99%

Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii

Hrenović

Dekić

Dikić

et al. 2020

Archives of Industrial Hygiene and Toxicology

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AbstractDue to the development of resistance to antimicrobial agents, bacterium Acinetobacter baumannii is nowadays a leading cause of nosocomial outbreaks. Clinically relevant A. baumannii outside hospital settings including natural soils affected by human waste represents a public-health risk for humans and animals. The aim of this study was to investigate the potential of metal-loaded zeolites to eliminate viable A. baumannii from artificially contaminated natural soils. A. baumannii isolate was subjected to the activity of natural zeolitised tuff (NZ) and Cu-modified (CuNZ) or Ag-modified zeolite (AgNZ) in wet, slightly acidic terra rossa and slightly alkaline red palaeosol. A. baumannii survived in terra rossa and red palaeosol supplemented with 1 wt% of NZ for seven days and four months, respectively. The addition of 1 wt% of CuNZ to terra rossa and red palaeosol shortened the survival of A. baumannii to three and 14 days, respectively. The addition of 0.1 wt% of AgNZ to both soils resulted in complete removal of viable A. baumannii within 1 h of contact, while the total native heterotrophic bacterial counts remained high. Since AgNZ is prepared with a simple modification of cost-effective and environmentally friendly natural zeolite, it is a promising material for the remediation of soils contaminated with pandrug-resistant A. baumannii.

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Retention of silver nano-particles and silver ions in calcareous soils: Influence of soil properties

Cited by 19 publications

References 41 publications

The Mobility of Silver Nanoparticles and Silver Ions in the Soil‐Plant System

The Mobility of Silver Nanoparticles and Silver Ions in the Soil‐Plant System

Effect of engineered nanoparticles on soil biota: Do they improve the soil quality and crop production or jeopardize them?

Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii

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