Concentrations and speciation of arsenic in New England seaweed species harvested for food and agriculture

Taylor, Vivien F.; Jackson, Brian P.

doi:10.1016/j.chemosphere.2016.08.004

Cited by 85 publications

(54 citation statements)

References 60 publications

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“…Recent investigations by the University of Dartmouth concluded that iAS is also present in food products (rice, beer, wine, chicken, etc.) [Taylor and Jackson, ]. We observed a continuously increasing concentration–response of γH2AX with the three arsenic compounds tested, reflecting overall genotoxicity that may be caused by oxidative stress and altered patterns of DNA repair [Martinez et al, ; Faita et al, ].…”

Section: Discussionmentioning

confidence: 79%

Genotoxicity of 11 heavy metals detected as food contaminants in two human cell lines

Kopp

Zalko

Audebert

2017

Environ and Mol Mutagen

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Heavy metals, such as arsenic (As), antimony (Sb), barium (Ba), cadmium (Cd), cobalt (Co), germanium (Ge), lead (Pb), nickel (Ni), tellurium (Te), and vanadium (V) are widely distributed in the environment and in the food chain. Human exposure to heavy metals through water and food has been reported by different international agencies. Although some of these heavy metals are essential elements for human growth and development, they may also be toxic at low concentrations due to indirect mechanisms. In this study, the genotoxic and cytotoxic properties of 15 different oxidation statuses of 11 different heavy metals were investigated using high-throughput screening (γH2AX assay) in two human cell lines (HepG2 and LS-174T) representative of target organs (liver and colon) for food contaminants. Base on their lowest observed adverse effect concentration, the genotoxic potency of each heavy metal in each cell line was ranked in decreasing order, NaAsO > CdCl > PbCl (only in LS-174T cells) > As O > SbCl > K TeO > As O . No significant genotoxicity was observed with the other heavy metals tested. Cell viability data indicate that several heavy metals (As, Cd, Co, Ni, Sb, and Te) induce cytotoxicity at high concentrations, whereas an increase in the number of cells was observed for lead concentrations >100 µM in both cell lines tested, suggesting that lead stimulates cell growth. All these results highlight the possible human health hazards associated with the presence of heavy metals present in food. Environ. Mol. Mutagen. 59:202-210, 2018. © 2017 Wiley Periodicals, Inc.

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Section: Discussionmentioning

confidence: 79%

Genotoxicity of 11 heavy metals detected as food contaminants in two human cell lines

Kopp

Zalko

Audebert

2017

Environ and Mol Mutagen

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“…The speciation of arsenic in filtered water samples was determined at the Trace Element Analysis laboratory at Dartmouth College on an Agilent LC1120 liquid chromatograph, using an anion‐exchange column (Hamilton PRP‐X100), coupled to an Agilent 8900 triple quadrupole ICP‐MS (Taylor and Jackson ). The eluent was 20 mM (NH 4 ) 2 CO 3 at a flow rate of 1.1 mL min −1 with a column temperature of 35°C.…”

Section: Methodsmentioning

confidence: 99%

Contrasting arsenic cycling in strongly and weakly stratified contaminated lakes: Evidence for temperature control on sediment–water arsenic fluxes

Barrett

Hull

Burkart

et al. 2019

Limnology & Oceanography

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Arsenic contamination of lakebed sediments is widespread due to a range of human activities, including herbicide application, waste disposal, mining, and smelter operations. The threat to aquatic ecosystems and human health is dependent on the degree of mobilization from sediments into overlying water columns and exposure of aquatic organisms. We undertook a mechanistic investigation of arsenic cycling in two impacted lakes within the Puget Sound region, a shallow weakly stratified lake and a deep seasonally stratified lake, with similar levels of lakebed arsenic contamination. We found that the processes that cycle arsenic between sediments and the water column differed greatly in shallow and deep lakes. In the shallow lake, seasonal temperature increases at the lakebed surface resulted in high porewater arsenic concentrations that drove larger diffusive fluxes of arsenic across the sediment-water interface compared to the deep, stratified lake where the lakebed remained~10 C cooler. Plankton in the shallow lake accumulated up to an order of magnitude more arsenic than plankton in the deep lake due to elevated aqueous arsenic concentrations in oxygenated waters and low phosphate : arsenate ratios in the shallow lake. As a result, strong arsenic mobilization from sediments in the shallow lake was countered by large arsenic sedimentation rates out of the water column driven by plankton settling.

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“…Seaweeds produced for consumption have continued to attract attention. A survey of As concentrations and speciation was conducted on 10 species of seaweed from commercial harvesters and from collection at two sites in New England, USA 69 . Samples were extracted using HNO 3 and microwave digestion prior to determination of the As species by ICP-MS (total As) and…”

Section: Montezuma Well Through Vents In the Bottom Of This Collapsedmentioning

confidence: 99%

Atomic Spectrometry Update: review of advances in elemental speciation

Clough

Harrington

Hill

et al. 2018

J. Anal. At. Spectrom.

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This is the ninth Atomic Spectrometry Update (ASU) to focus on advances in elemental speciation and covers a period of approximately 12 months from December 2015. This ASU review deals with all aspects of the analytical atomic spectrometry speciation methods developed for: the determination of oxidation states; organometallic compounds; coordination compounds; metal and heteroatom-containing biomolecules, including metalloproteins, proteins, peptides and amino acids; and the use of metal-tagging to facilitate detection via atomic spectrometry. The review does not cover fractionation, which is sometimes termed operationally defined speciation. As with all ASU reviews the focus of the research reviewed includes those methods that incorporate atomic spectrometry as the measurement technique. However, because speciation analysis is inherently focused on the relationship between the metal(loid) atom and the organic moiety it is bound to, or incorporated within, atomic spectrometry alone cannot be the sole analytical approach of interest. For this reason molecular detection techniques are also included where they have provided a complementary approach to speciation analysis. As in previous years, As and Se speciation continues to dominate the current literature, with reports of the speciation of Cr and Hg also increasing, and there are an ever rising number of publications concerning the analysis of 'biomolecules'. Whilst most of this work is still the preserve of the research field some methods are now approaching the robustness and rapidity for use in the clinical setting.

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Concentrations and speciation of arsenic in New England seaweed species harvested for food and agriculture

Cited by 85 publications

References 60 publications

Genotoxicity of 11 heavy metals detected as food contaminants in two human cell lines

Genotoxicity of 11 heavy metals detected as food contaminants in two human cell lines

Contrasting arsenic cycling in strongly and weakly stratified contaminated lakes: Evidence for temperature control on sediment–water arsenic fluxes

Atomic Spectrometry Update: review of advances in elemental speciation

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