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TZUNTIL:20251026T010000Z
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DTSTART:20231029T030000
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BEGIN:VEVENT
UID:www.bayceer.uni-bayreuth.de-bayceer-t168969id
DTSTAMP:20260815T173030Z
DESCRIPTION:Antimony (Sb) and arsenic (As) are two toxic trace elements com
 monly found in soils. While As has been extensively studied\, relatively l
 ittle is known about Sb despite it being a toxic and potentially carcinoge
 nic metalloid listed as a pollutant of primary concern. Both elements are 
 redox-sensitive and their biogeochemical cycles are strongly influenced by
  (micro-)organisms. This leads to the formation of different chemical spec
 ies of varying mobility and toxicity. To understand their environmental fa
 te\, one must therefore rely on complex extraction and speciation analysis
  techniques such as chromatography coupled to mass spectrometry. In the en
 vironment\, these two trace elements can be released from soil due to floo
 ding\, thereby becoming available to soil (micro-) organisms and plants\, 
 the starting point of the food chain. Once released\, they can undergo a n
 umber of biotransformations\, two of which are of specific interest to me 
 since my PhD: biomethylation and biovolatilisation. These two intertwined 
 biological mechanisms are impacted by land use and climate change\, but th
 e underlying mechanisms are still not fully understood. In this talk\, I w
 ill introduce these two elements as well as key concepts and drivers of re
 lease\, biomethylation\, and biovolatilisation. I will then focus on the r
 elease of Sb from soil to soil solution\, and subsequent biovolatilisation
  and plant uptake. Another highlight will be set on the release and biotra
 nsformation of As under the influence of climate (flooding and temperature
 ). Further\, I will present some new research from our group on atmospheri
 c transport of volatile As\, the prevalence of methylated As species in Sw
 iss rice paddies\, and the influence of the gut microbiome on As retention
 \, excretion\, and speciation in mice.\n&nbsp\;\n*** invited by BayCEER me
 mbers Kerstin Hockmann &amp\; Britta Planer-Friedrich
DTSTART;TZID=Europe/Berlin:20231207T000000
DTEND;TZID=Europe/Berlin:20231207T235959
SUMMARY:Prof. Dr. Adrien Mestrot\, Unit Leader Soil Science\, University of
  Bern (Homepage): Release\, biomethylation\, and biovolatilisation of arse
 nic and antimony in the environment: from soils to plants and humans
TRANSP:TRANSPARENT
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