Environmental factors determining the trace-level sorption of silver and thallium to soils

Jacobson, Astrid R.; McBride, Murray B.; Baveye, Philippe C.; Steenhuis, Tammo S.

doi:10.1016/j.scitotenv.2004.10.027

Cited by 196 publications

(130 citation statements)

References 36 publications

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“…According to previous studies made with soil materials 15,17,18 and isolated humic fractions 28 , this would enable equilibration of silver(I) ions in the soil suspensions. Long equilibration times (weeks-months), might result in ageing and transformation reactions 15,16 . After equilibration, the samples were centrifuged and filtered through a 0.2 µm Acrodisc PF filter (Gelman Sciences).…”

Section: Methodsmentioning

confidence: 99%

Silver(I) Binding Properties of Organic Soil Materials Are Different from Those of Isolated Humic Substances

Kleja

Nakata

Persson

et al. 2016

Environ. Sci. Technol.

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The solubility of silver(I) in many soils is controlled by complexation reactions with organic matter. In this work we have compared the ability of isolated humic and fulvic acids to bind silver(I) with that of mor and peat materials. One new data set for Suwannee River Fulvic Acid was produced, which was consistent with published data sets for isolated fulvic and humic acids. The ability of soil materials to bind silver(I) was studied as a function of pH in the range 2.5-5.0, at a wide range of silver(I)-to-soil ratios (10(-4.2) - 10(-1.9) mol kg(-1)). By calibrating the Stockholm Humic Model on the humic and fulvic acids data sets, we showed that binding of silver(I) to both types of soil materials was much stronger (up to 2 orders of magnitude) than predicted from the silver(I) binding properties of the isolated humic materials. Thus, the approach taken for many other metals, that is, to model solubility in soils by using metal and proton binding parameters derived from isolated humic and fulvic acids, cannot be used for silver(I). One possible explanation for the discrepancy could be that silver(I) predominately interacted with various biomolecules in the soil samples, instead of humic- and fulvic-acid type materials.

QC 20160913

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Section: Methodsmentioning

confidence: 99%

Silver(I) Binding Properties of Organic Soil Materials Are Different from Those of Isolated Humic Substances

Kleja

Nakata

Persson

et al. 2016

Environ. Sci. Technol.

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QC 20160913

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“…Most studies on soils indicate that it is not strongly bound by soil components and has been shown to quickly de-sorb, and hence poses an environmental and health hazard [8].…”

mentioning

confidence: 99%

Molybdenum, Silver, Thallium and Vanadium

Evans

Barabash

2010

Trace Elements in Soils

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“…These results are in agreement with earlier studies on Ag retention in soils which also found strong retention by the solid phase. [40,[48][49][50][51] Compared to other metals, Ag þ which has a median K d of 1400 L kg À1 (calculated from this study) appears to be retained with a similar strength as Zn or As in soils. [17] We could detect no labile Ag in the European GEMAS soils (because total Ag þ in solution was below the limit of detection of ICP-MS) indicating that most of the geogenic Ag was occluded in crystal lattices or precipitated/reduced (e.g.…”

Section: Partitioning and Lability Of Silver In Soilsmentioning

confidence: 76%

A method to determine silver partitioning and lability in soils

et al. 2014

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Environmental context. Soils contaminated with silver can have detrimental environmental effects because of silver's toxicity to a range of soil-dwelling organisms. The total concentration of silver in soil, however, is often not a good indicator of potential toxicity as it does not account for variations in bioavailability. We report a method for soil analysis that measures the amount of silver available for uptake by soil-dwelling organisms, and hence could provide data that better reflect potential toxicity.Abstract. There is increasing potential for pollution of soils by silver because of an increased use of this metal in consumer and industrial products. Silver may undergo reactions with soil components that mitigate its availability and potential toxicity, so that the total concentration of this metal in soil is not a useful indicator of potential risk. We developed an isotopic dilution method to simultaneously measure the partitioning (K d -value) and lability (E-value) of Ag in soils, using the 110m Ag isotope. An equilibration solution containing 10 mM Ca(NO 3 ) 2 was used along with a cation exchange resin to correct for possible interferences from non-isotopically exchangeable Ag associated with soil colloids in suspension (E r -value). The quantification limits for K d and E r will depend on the amounts of radioisotope spiked and daily detection limits of inductively coupled plasma-mass spectrometry instrumentation but are typically .4000 L kg À1 and ,0.92 mg kg À1 . Measurement of K d values for Ag in a range of soils indicated strong partitioning to the solid phase is positively associated with soil cation-exchange capacity or total organic carbon and pH. The concentrations of labile Ag in soils geogenically enriched in Ag were not detectable indicating occlusion of the Ag within poorly soluble solid phases. Measurement of labile Ag in soils spiked with a soluble Ag salt and aged for 2 weeks indicated rapid conversion of soluble Ag into non-isotopically exchangeable forms, either irreversibly adsorbed or precipitated in the soil. These results indicate that measurement of labile Ag will be important to estimate toxicity risks to soil organisms or to predict bioaccumulation through the food chain.

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Environmental factors determining the trace-level sorption of silver and thallium to soils

Cited by 196 publications

References 36 publications

Silver(I) Binding Properties of Organic Soil Materials Are Different from Those of Isolated Humic Substances

Silver(I) Binding Properties of Organic Soil Materials Are Different from Those of Isolated Humic Substances

Molybdenum, Silver, Thallium and Vanadium

A method to determine silver partitioning and lability in soils

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