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Rethinking the Minamata Tragedy: What Mercury Species Was Really Responsible?

Journal Article · · Environmental Science and Technology
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  1. Univ. of Saskatchewan, Saskatoon, SK (Canada)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  3. Ministry of the Environment, Kumamoto (Japan). National Inst. for Minamata Disease
  4. Univ. of Rochester, NY (United States)
Industrial release of mercury into the local Minamata environment with consequent poisoning of local communities through contaminated fish and shellfish consumption is considered the classic case of environmental mercury poisoning. However, the mercury species in the factory effluent has proved controversial, originally suggested as inorganic, and more recently as methylmercury species. In this investigation, we used newly available methods to re-examine the cerebellum of historic Cat 717, which was fed factory effluent mixed with food to confirm the source. Synchrotron high-energy-resolution fluorescence detection-X-ray absorption spectroscopy revealed sulfur-bound organometallic mercury with a minor β-HgS phase. Density functional theory indicated energetic preference for α-mercuri-acetaldehyde as a waste product of aldehyde production. The consequences of this alternative species in the “classic” mercury poisoning should be re-evaluated.
Research Organization:
SLAC National Accelerator Laboratory, Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Sponsoring Organization:
Canada Foundation for Innovation (CFI); Canada Research Chairs; National Institute of General Medical Sciences (NIGMS); National Institutes of Health (NIH); Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1608345
Journal Information:
Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 5 Vol. 54; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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