Institutional Research Information Service
UCL Logo
Please report any queries concerning the funding data grouped in the sections named "Externally Awarded" or "Internally Disbursed" (shown on the profile page) to your Research Finance Administrator. Your can find your Research Finance Administrator at https://www.ucl.ac.uk/finance/research/rs-contacts.php by entering your department
Please report any queries concerning the student data shown on the profile page to:

Email: portico-services@ucl.ac.uk

Help Desk: http://www.ucl.ac.uk/ras/portico/helpdesk
The London Arsenic Group

The London Arsenic Group brings together expertise from the fields of sedimentary geochemistry, hydrochemistry, environmental mineralogy and analytical geochemistry. We seek to understand the source, mobility, and fate, of arsenic in the environment. We exist to bring a multi-disciplinary approach to this issue and provide a focus for exchange of views.

Arsenic is a poison and carcinogen. Arsenic is most damaging as the inorganic form, with recent work suggesting As(III) and As(V) are equally toxic. The USEPA has recently adopted an MAC of 10 microgrammes per litre for the concentration of arsenic in drinking water, based on a legal requirement to follow a linear dose-response curve for arsenic toxicity in the absence of compelling evidence that other models (such as hormesis) apply. Arsenic occurs in small amounts in food, frequently as organic arsenic (arsenobetaine, arsenosugars etc.), which are less toxic than inorganic arsenic. In nature, arsenic exists overwhelmingly either in substitution for sulfur in iron sulfides, or sorbed to iron oxyhydroxides. Arsenic is released to the environment by weathering of the former, or reduction of the latter. These mechanisms explain most occurrences of arsenic in the environment at concentrations that might cause environmental harm.

Contact: earthsci@ucl.ac.uk

2 Researchers
 More search options
University College London - Gower Street - London - WC1E 6BT Tel:+44 (0)20 7679 2000

© UCL 1999–2011

Search by