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TZID:Europe/Berlin
TZUNTIL:20161030T010000Z
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DTSTART:20131027T030000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RDATE:20141026T030000
RDATE:20151025T030000
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DTSTART:20140330T020000
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BEGIN:VEVENT
UID:www.bayceer.uni-bayreuth.de-bayceer-t119654id
DTSTAMP:20260408T212145Z
DESCRIPTION:Wetland systems like peatlands\, swamps\, and marshes cover mor
 e than six percent of the Earth's ice-free land area and are often enriche
 d in trace elements such as arsenic (As). This pervasive toxin frequently 
 reaches concentrations of environmental concern owing to historic or prese
 nt mining\, natural sulfide mineral weathering\, or its use in agriculture
 . Since the mobility\, bioavailability\, and toxicity of As depends on its
  chemical form\, speciation analyses are of prime importance to judge the 
 environmental risk associated with As and to explore major controls of As 
 cycling in wetlands.\nThis talk will summarize recent advances in the soli
 d-phase speciation of As in wetlands using synchrotron-based techniques. I
 t will focus on the speciation and distribution of As in minerotrophic and
  ombrotrophic peat soils\, strongly As-contaminated floodplain soils\, and
  suspended Fe-rich organic flocs of As-impacted wetland streams. Specific 
 attention will be given to the mechanisms and controls of As binding to na
 tural organic matter\, the mineralogy and bioaccessibility of As in contam
 inated wetlands\, and potential management strategies for As-rich wetlands
 .\n \n***\nInvited by Britta Planer-Friedrich\, Environmental Geochemistry
  Group
DTSTART;TZID=Europe/Berlin:20141023T000000
DTEND;TZID=Europe/Berlin:20141023T235959
SUMMARY:Dr. Christian Mikutta\, Institute of Biogeochemistry and Pollutant 
 Dynamics\, ETH Zürich (Homepage): Arsenic Speciation and Dynamics in Wetla
 nds
TRANSP:TRANSPARENT
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