SEGH Events

7th International Workshop on Chemical Bioavailability

04 November 2013
British Geological Survey, Nottingham, UK
The 7th IWCB is a premier event for highlighting research in chemical bioavailability in the environment.

On behalf of the International Organising Committee, the British Geological Survey (BGS) and the University of Nottingham invite everyone to discuss and exchange new and emerging scientific breakthroughs in chemical bioavailability at the 7th International Workshop on Chemical Bioavailability (IWCB). This series is emerging as a premier event for highlighting research in chemical bioavailability in the environment.  We hope that the workshop will provide the opportunity for delegates to exchange knowledge and experience and to further develop a common view on contaminant bioavailability.

Why attend?

  • network with leading figures in the field
  • visit the exhibition to discover new products and services to enhance your research

Call for papers

We invite you to submit an abstract for an oral or poster presentation.  Please use the template on our webpage http://www.bgs.ac.uk/news/events/bioavailabilityWorkshop/home.html and send your completed submission to Cbio7@bgs.ac.uk

 

Themes

  • analytical methodologies
  • models - QSAR for organic bioaccessibility, predictive, spatial, soil properties
  • reference materials
  • case studies on risk based land management
  • microbial bioavailability
  • essential nutrients
  • risk assessment and communication
  • plant uptake
  • chemomimetics
  • sentinel species
  • nano-materials
  • oral, inhalation and dermal pathways

 

Dr Mark Cave, British Geological Survey

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Science in the News

Latest on-line papers from the SEGH journal: Environmental Geochemistry and Health

  • Increase in platinum group elements in Mexico City as revealed from growth rings of Taxodium mucronatum ten 2015-04-24

    Abstract

    Tree rings may be used as indicators of contamination events providing information on the chronology and the elemental composition of the contamination. In this framework, we report PGEs enrichment in growth rings of Taxodium mucronatum ten for trees growing in the central area of Mexico City as compared to trees growing in a non-urban environment. Concentrations of PGE were determined by ICP-MS analysis on microwave-digested tree rings. The element found in higher concentrations was Pd (1.13–87.98 μg kg−1), followed by Rh (0.28–36.81 μg kg−1) and Pt (0.106–7.21 μg kg−1). The concentration trends of PGEs in the tree-ring sequences from the urban area presented significant correlation values when comparing between trees (r between 0.618 and 0.98, P < 0.025) and between elements within individual trees (r between 0.76 and 0.994, P < 0.01). Furthermore, a clear increase was observed for rings after 1997, with enrichment of up to 60 times the mean concentration found for the sequence from the non-urban area and up to 40 times the mean concentration for the pre-1991 period in the urban trees. These results also demonstrate the feasibility of applying T. mucronatum ten to be used as a bioindicator of the increase in PGE in urban environments.

  • Trace elements distributions at Datoko-Shega artisanal mining site, northern Ghana 2015-04-24

    Abstract

    Environmental geochemistry classifies elements into essential, non-essential and toxic elements in relationship to human health. To assess the environmental impact of mining at Datoko-Shega area, the distributions and concentrations of trace elements in stream sediments and soil samples were carried out. X-ray fluorescence analytical technique was used to measure the major and trace element concentrations in sediments and modified fire assay absorption spectrometry in soils. The results showed general depletion of major elements except titanium oxide (TiO2) compared to the average crustal concentrations. The retention of TiO2 at the near surface environment probably was due to the intense tropical weathering accompanied by the removal of fine sediments and soil fractions during the harmattan season by the dry north-east trade winds and sheet wash deposits formed after flash floods. The results also showed extreme contamination of selenium (Se), cadmium (Cd) and mercury (Hg), plus strong contaminations of arsenic (As) and chromium (Cr) in addition to moderate contamination of lead (Pb) in the trace element samples relative to crustal averages in the upper continental crust. However Hg, Pb and Cd concentrations tend to be high around the artisanal workings. It was recognised from the analysis of the results that the artisanal mining activity harnessed and introduces some potentially toxic elements such as Hg, Cd and Pb mostly in the artisan mine sites. But the interpretation of the trace element data thus invalidates the elevation of As concentrations to be from the mine operations. It consequently noticed As values in the mine-impacted areas to be similar or sometimes lower than As values in areas outside the mine sites from the stream sediment results.

  • A gradient of mercury concentrations in Scottish single malt whiskies 2015-04-18

    Abstract

    Mercury (Hg) concentrations were measured in 26 Scottish single malt whiskies, and all found to be very low (<10 ng L−1), posing no threat to human health through reasonable levels of consumption. However, a significant south-to-north declining gradient in Hg concentrations was observed reflecting that reported for atmospheric deposition. We speculate that this gradient could be due to a combination of contemporary deposition and the legacy of industrial mercury emissions and deposition over the last 200 years affecting concentrations in local waters used in whisky production. As UK atmospheric emissions of mercury have declined by 90 % since the 1970s, we suggest that whisky being produced today should have even lower Hg concentrations when consumed in 10- to 15-years time. This reduction may be compromised by the remobilisation of contaminants stored in catchment soils being transferred to source waters, but is very unlikely to raise the negligible health risk due to Hg from Scottish single malt whisky consumption.