Vanadium(III) Sulfate as a Reducing Agent for Determination of Perchlorate.

Zatko, David A.; Kratochvil, Byron

doi:10.1021/ac60231a026

Cited by 20 publications

(8 citation statements)

References 9 publications

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“…Determination of perchlorate as a complex form with some colorants such as methylene blue, neutral red etc. is also used in colorimetric [50] and spectrophotometric [51][52][53][54][55] methods. However, there are many interfering factors which encumber the application of such methods in biological samples (e.g., body fluids).…”

Section: Methods Of Productionmentioning

confidence: 99%

Perchlorate – properties, toxicity and human health effects: an updated review

Niziński

Błażewicz

Kończyk

et al. 2020

Reviews on Environmental Health

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Interest in perchlorate as environmental pollutant has increased since 1997, when high concentrations have been found in the waters of the Colorado River, USA. Perchlorate is very persistent in nature and it is slowly degraded. Although harmful effects of large doses of perchlorate on thyroid function have been proven, the environmental effects are still unclear. The primary objective of the present review is to collect prevailing data of perchlorate exposure and to discuss its impact on human health. The results show that more than 50% of reviewed works found significant associations of perchlorate exposure and human health. This review consists of the following sections: general information of perchlorate sources, its properties and determination methods, role and sources in human body including food and water intake, overview of the scientific literature on the research on the effect of perchlorate on human health from 2010 to 2020. Finally, conclusions and recommendations on future perchlorate studies concerning human exposure are presented.

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Section: Methods Of Productionmentioning

confidence: 99%

Perchlorate – properties, toxicity and human health effects: an updated review

Niziński

Błażewicz

Kończyk

et al. 2020

Reviews on Environmental Health

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“…Many procedures for separation and determination of metals have been improved by application of the technique of precipitation from homogeneous solution (PFHS), following methods initiated by . H. Willard (7). An outstanding example is the Willard-Yu (2) method of precipitation of ceric iodate by formation of cerium(IV) ions from cerium(III) in a solution containing an excess of iodate ions.…”

Section: Resultsmentioning

confidence: 99%

“…The decrease in color concomitant to the precipitation of copper(II) tetrapyridine perchlorate has been utilized in another indirect method (6). A redox reaction in which perchlorate was reduced to chloride by vanadium(III) to give an equivalent amount of vanadium(IV) was the basis of an indirect spectrophotometric method involving absorbance measurements at two wavelengths (7). The absorbance measurements at 400 and 750 µ were necessary in order to correct for the absorbance due to the residual vanadium(III).…”

Section: Resultsmentioning

confidence: 99%

Precipitation of berkelium(IV) iodate from homogeneous solution

Weaver¹

1968

Anal. Chem.

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“…V(III) oxide (V 2 O 3 ) (Alfa Aesar 95%) was used as received. V(III) sulfate [V 2 (SO 4 ) 3 ] was synthesized as described by Zatko and Kratochvil [67] with minor modification. Briefly, 1 g of V 2 O 5 (Sigma-Aldrich 99.95%) and 1 g of elemental sulfur were added to 15 mL of concentrated (98%) H 2 SO 4 in a 50 mL beaker containing a Teflon-coated magnetic stir bar.…”

Section: Standardsmentioning

confidence: 99%

Reduction of Vanadium(V) by Iron(II)-Bearing Minerals

2021

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Fe(II)-bearing minerals (magnetite, siderite, green rust, etc.) are common products of microbial Fe(III) reduction, and they provide a reservoir of reducing capacity in many subsurface environments that may contribute to the reduction of redox active elements such as vanadium; which can exist as V(V), V(IV), and V(III) under conditions typical of near-surface aquatic and terrestrial environments. To better understand the redox behavior of V under ferrugenic/sulfidogenic conditions, we examined the interactions of V(V) (1 mM) in aqueous suspensions containing 50 mM Fe(II) as magnetite, siderite, vivianite, green rust, or mackinawite, using X-ray absorption spectroscopy at the V K-edge to determine the valence state of V. Two additional systems of increased complexity were also examined, containing either 60 mM Fe(II) as biogenic green rust (BioGR) or 40 mM Fe(II) as a mixture of biogenic siderite, mackinawite, and magnetite (BioSMM). Within 48 h, total solution-phase V concentrations decreased to <20 µM in all but the vivianite and the biogenic BiSMM systems; however, >99.5% of V was removed from solution in the BioSMM and vivianite systems within 7 and 20 months, respectively. The most rapid reduction was observed in the mackinawite system, where V(V) was reduced to V(III) within 48 h. Complete reduction of V(V) to V(III) occurred within 4 months in the green rust system, 7 months in the siderite system, and 20 months in the BioGR system. Vanadium(V) was only partially reduced in the magnetite, vivianite, and BioSMM systems, where within 7 months the average V valence state stabilized at 3.7, 3.7, and 3.4, respectively. The reduction of V(V) in soils and sediments has been largely attributed to microbial activity, presumably involving direct enzymatic reduction of V(V); however the reduction of V(V) by Fe(II)-bearing minerals suggests that abiotic or coupled biotic–abiotic processes may also play a critical role in V redox chemistry, and thus need to be considered in modeling the global biogeochemical cycling of V.

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Vanadium(III) Sulfate as a Reducing Agent for Determination of Perchlorate.

Cited by 20 publications

References 9 publications

Perchlorate – properties, toxicity and human health effects: an updated review

Perchlorate – properties, toxicity and human health effects: an updated review

Precipitation of berkelium(IV) iodate from homogeneous solution

Reduction of Vanadium(V) by Iron(II)-Bearing Minerals

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