Contrasted fate of zinc sulfide nanoparticles in soil revealed by a combination of X-ray absorption spectroscopy, diffusive gradient in thin films and isotope tracing

Bars, Maureen Le; Legros, Samuel; Levard, Clément; Chevassus-Rosset, Claire; Montes, Mélanie; Tella, Marie; Borschneck, Daniel; Guihou, Abel; Angeletti, Bernard; Dœlsch, Emmanuel

doi:10.1016/j.envpol.2021.118414

Cited by 4 publications

(10 citation statements)

References 87 publications

(162 reference statements)

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“…The mechanisms controlling the fate of these small nano-ZnS also need further investigation. Indeed, small nano-ZnS (3–5 nm) were seen to undergo transformation in soil much faster (within months) , than their 25–40 nm homologues (within years) . The size threshold below which new properties of the nanomaterial are observed is typically 20–30 nm .…”

Section: Resultsmentioning

confidence: 99%

“…The resulting nano-ZnS are hereafter referred to as ZnS_ser, ZnS_cys, ZnS_GSH, ZnS_hist, and ZnS_ace, respectively. To include organic molecules, the synthesis method was adapted from bare nano-ZnS synthesis methods (see Supporting Information part I for more details). ,,, To be representative of environmental conditions, we chose contents with excess S and organic molecules compared to Zn (a S/Zn molar ratio of 1.2 and an OM/Zn molar ratio of 2), neutral pH (7), and room temperature (∼25 °C). The final concentration of ZnS was set at 0.01 M. The samples were prepared in an anoxic glovebox (N 2 atmosphere) using N 2 -purged ultrapure water.…”

Section: Methodsmentioning

confidence: 99%

“…For example, we recently showed that the dissolution kinetics of nano-ZnS applied on soil and the availability of released ions (Zn 2+ ) were controlled by the soil properties (e.g., mineralogy and texture). 9 However, we still need to see if, in such complex environments, that is, amended soils, the effect of intrinsic…”

Section: Organic Molecules With No Effects or Only Slight Effects On ...mentioning

confidence: 99%

“…5−8 Nano-ZnS formed in OW are 3−5 nm in size and have been shown to undergo transformation in days or months in OW or amended soils. 5,7,9 Considering the high concentration of Zn in OW combined with the amount of OW applied on croplands, we previously estimated that 440,000 tons of nano-ZnS are released into the environment each year. 10 Sulfur in soil is an essential macronutrient for plants, 11 and its reduction to sulfide can lead to the immobilization of chalcophile metals (Fe, Cu, Cd, Hg) through metal sulfide precipitation.…”

Section: Introductionmentioning

confidence: 99%

“…Zinc sulfide nanoparticles (nano-ZnS) are of great interest due to their size-dependent electric and optical properties that can be tuned for different technological applications. , Nano-ZnS can also be found in nature, for example, in systems undergoing sulfate reduction by bacteria , or formed incidentally in liquid and anaerobically digested zinc-rich organic waste (OW) used as the agricultural fertilizer. − Nano-ZnS formed in OW are 3–5 nm in size and have been shown to undergo transformation in days or months in OW or amended soils. ,, Considering the high concentration of Zn in OW combined with the amount of OW applied on croplands, we previously estimated that 440,000 tons of nano-ZnS are released into the environment each year . Sulfur in soil is an essential macronutrient for plants, and its reduction to sulfide can lead to the immobilization of chalcophile metals (Fe, Cu, Cd, Hg) through metal sulfide precipitation .…”

Section: Introductionmentioning

confidence: 99%

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Size and Strain of Zinc Sulfide Nanoparticles Altered by Interaction with Organic Molecules

Bars

Levard

Legros

et al. 2022

Environ. Sci. Technol.

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Nanosized zinc sulfides (nano-ZnS) have size-dependent and tunable physical and chemical properties that make them useful for a variety of technological applications. For example, structural changes, especially caused by strain, are pronounced in nano-ZnS < 5 nm in size, the size range typical of incidental nano-ZnS that form in the environment. Previous research has shown how natural organic matter impacts the physical properties of nano-ZnS but was mostly focused on their aggregation state. However, the specific organic molecules and the type of functional groups that are most important for controlling the nano-ZnS size and strain remain unclear. This study examined the size-dependent strain of nano-ZnS synthesized in the presence of serine, cysteine, glutathione, histidine, and acetate. Synchrotron total scattering pair distribution function analysis was used to determine the average crystallite size and strain. Among the different organic molecules tested, those containing a thiol group were shown to affect the particle size and size-induced strain most strongly when added during synthesis but significantly reduced the particle strain when added to as-formed nano-ZnS. The same effects are useful to understand the properties and behavior of natural nano-ZnS formed as products of microbial activity, for example, in reducing environments, or of incidental nano-ZnS formed in organic wastes.

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