Complexation effect of antimony compounds with citric acid and its application to the speciation of antimony(iii) and antimony(v) using HPLC-ICP-MS

Zheng, Jian; Iijima, Akihiro; Furuta, Naoki

doi:10.1039/b101943k

Cited by 104 publications

(51 citation statements)

References 20 publications

(59 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[56][57][58] Extraction procedures similar to the ones described for soils have been applied to a limited extent to airborne particulate matter. [59,60] The operational character of such methods, and the limitations implied, remain the same as those discussed for other solid matrices.…”

Section: Atmospherementioning

confidence: 79%

See 1 more Smart Citation

Antimony in the environment: knowns and unknowns

2009

View full text Add to dashboard Cite

Environmental context. Antimony first attracted public attention in the mid-1990s amid claims that it was involved in Sudden Infant Death Syndrome. A substantial number of papers have now been published on the element and its behaviour in the natural environment. However, many key aspects of the environmental chemistry of antimony remain poorly understood. These include critical areas such as its ecotoxicology, its global cycling through different environmental compartments, and what chemical form it takes in different environments. More focussed research would help the situation. The present review highlights several areas of environmental antimony chemistry that urgently need to be addressed.Abstract. The objective of the present article is to present a critical overview of issues related to the current state of knowledge on the behaviour of antimony in the environment. It makes no attempt to systematically review all published data. However, it does provide a list of the main published reviews on antimony and identifies subjects where systematic reviews are needed. Areas where our knowledge is strong -and the corresponding gaps -in subjects ranging from total concentrations and speciation in the various environmental compartments, to ecotoxicity, to cycling between compartments, are discussed, along with the underlying research. Determining total antimony no longer poses a problem for most environmental samples but speciation measurements remain challenging throughout the process, from sampling to analysis. This means that the analytical tools still need to be improved but experience shows that, to be useful in practice, this should be directly driven by the requirements of laboratory and field measurements. Many different issues can be identified where further research is required, both in the laboratory and in the field, the most urgently needed studies probably being: (i) long-term spatial and temporal studies in the different environmental compartments in order to collect the data needed to establish a global biogeochemical cycle; (ii) laboratory studies of antimony interactions with potential natural binders; (iii) reliable ecotoxicological studies. Montserrat Filella is a chemist and teaches Environmental Chemistry at the University of Geneva, Switzerland. Her main research interests focus on the understanding of the physicochemical processes regulating the behaviour of chemical components in environmental and biological compartments, mainly by combining computer modelling with field and laboratory measurements. The three main axes of her research concern the study of: colloids in natural waters, natural organic matter (quantification and interaction with trace elements) and Group 15 elements. She is also interested in other topics

show abstract

Section: Atmospherementioning

confidence: 79%

“…For instance, tartaric, lactic, citric and oxalic acids are known to suppress the detection of Sb V in HG methods. [60,76] Addition of a post-column photooxidation step may help to solve the problem. [77] Many of the insights of Hansen and Pergantis [7] on conservation of biological samples also apply to other solid matrices such as soils.…”

Section: Soilsmentioning

confidence: 99%

Antimony in the environment: knowns and unknowns

2009

View full text Add to dashboard Cite

show abstract

“…1, mobile phase A) at the applied concentrations and pH values. 8,9 Hence, the lacking ability to convert Sb(V) complexes into one common complex partly explains the numerous reports of unidentified peaks even in studies where the EDTA-phthalic acid mobile phase was used. 8,[10][11][12] For the purpose of oxidation state determination, the elution of various Sb complexes is a limitation.…”

Section: Introductionmentioning

confidence: 99%

Quantitative HPLC-ICP-MS analysis of antimonyredox speciation in complex sample matrices: new insights into the Sb-chemistry causing poor chromatographic recoveries

Hansen

Schmidt

Larsen

et al. 2011

Analyst

View full text Add to dashboard Cite

“…21 The speciation of As(III) and As(V) was separated and quantified using the UPLC-ICP-MS method. 22 H 2 O 2 was analyzed colorimetrically at 400 nm by using potassium titanium oxalate solution. 23 Electron spin resonance (ESR) analysis was obtained using a Bruker electron paramagnetic resonance spectrometer (ESP 300E).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Redox Conversion of Chromium(VI) and Arsenic(III) with the Intermediates of Chromium(V) and Arsenic(IV) via AuPd/CNTs Electrocatalysis in Acid Aqueous Solution

Sun

Zhang

Qin

et al. 2015

Environ. Sci. Technol.

View full text Add to dashboard Cite

Simultaneous reduction of Cr(VI) to Cr(III) and oxidation of As(III) to As(V) is a promising pretreatment process for the removal of chromium and arsenic from acid aqueous solution. In this work, the synergistic redox conversion of Cr(VI) and As(III) was efficiently achieved in a three-dimensional electrocatalytic reactor with synthesized AuPd/ CNTs particles as electrocatalysts. The AuPd/CNTs facilitated the exposure of active Pd{111} facets and possessed an approximate two-electrontransfer pathway of oxygen reduction with the highly efficient formation of H 2 O 2 as end product, resulting in the electrocatalytic reduction of 97.2 ± 2.4% of Cr(VI) and oxidation of 95.7 ± 4% of As(III). The electrocatalytic reduction of Cr(VI) was significantly accelerated prior to the electrocatalytic oxidation of As(III), and the effectiveness of Cr(VI)/As(III) conversion was favored at increased currents from 20 to 150 mA, decreased initial pH from 7 to 1 and concentrations of Cr(VI) and As(III) ranging from 50 to 1 mg/L. The crucial intermediates of Cr(V) and As(IV) and active free radicals HO• and O 2 •− were found for the first time, whose roles in the control of Cr(VI)/As(III) redox conversion were proposed. Finally, the potential applicability of AuPd/CNTs was revealed by their stability in electrocatalytic conversion over 10 cycles. ■ INTRODUCTIONThe combined pollution of heavy metals in acid wastewater has become a formidable problem to environmental scientists and engineers for decades. As a consequence of improper treatment, effluents containing abundant heavy metal ions such as lead, nickel, copper, arsenic, or chromium may inflow into surface water or seep into groundwater, which pose great threats to aquatic life and drinking water sources.1,2 Thus, it is urgent to remove the heavy metals prior to their discharge into the environment.Arsenic and chromium, as priority pollutants, are highly toxic and frequently coexist with highly acidic wastewater (e.g., acid mine drainage).3 The valence states of arsenic or chromium have decisive impacts on their environmental fate and toxic effect.4,5 For example, As(III) is the most prevalent form of arsenic in the natural environment, which is more toxic than As(V) to mammals. 6 Additionally, As(III) is also more mobile than As(V), because As(III) is quite easier originated from the oxidative weathering or reductive dissolution of As-containing minerals, suggesting the immobilization of As(III) in acid solution more strictly depends on the redox conditions. 7 Therefore, it is advisible to preoxidize As(III) to As(V), coupled with a following adsorption or coprecipitation of the As(V) by using adsorbents or coagulants, to finally enhance the removal of arsenic species in acid aqueous solution. 8,9 Similarly, Cr(VI) is quite soluble and mobile in acid wastewater, 10 whileCr(III) is less toxic and insoluble, and can be effectively immobilized as the hydroxide in a wide pH range. 11,12 Thus, the prereduction of Cr(VI) to Cr(III) is conducive to the complete removal of ch...

show abstract

Complexation effect of antimony compounds with citric acid and its application to the speciation of antimony(iii) and antimony(v) using HPLC-ICP-MS

Cited by 104 publications

References 20 publications

Antimony in the environment: knowns and unknowns

Antimony in the environment: knowns and unknowns

Quantitative HPLC-ICP-MS analysis of antimonyredox speciation in complex sample matrices: new insights into the Sb-chemistry causing poor chromatographic recoveries

Redox Conversion of Chromium(VI) and Arsenic(III) with the Intermediates of Chromium(V) and Arsenic(IV) via AuPd/CNTs Electrocatalysis in Acid Aqueous Solution

Contact Info

Product

Resources

About