BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:EESS talk on "Photochemical fate of lampricides in tributaries of 
 the Great Lakes"
DTSTART:20190326T121500
DTEND:20190326T130000
DTSTAMP:20260916T210801Z
UID:86ffb40a48003ac14491ebd9bedd8719c0af3f7630650aa1d9f32cfc
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Christy Remucal\, Associate professor\, Aquatic Chemistry g
 roup\, Civil & Environmental Engineering\, College of Engineering\, Univer
 sity of Wisconsin-Madison\, USA - visiting professor  LTQE\nnée Christin
 a Renée Keenan\, leads the Aquatic Chemistry group at the University of W
 isconsin\, Madison and is the Director of the Water Science and Engineerin
 g Laboratory. She is a faculty member in the Department of Civil & Environ
 mental Engineering\, the Environmental Chemistry & Technology Program\, an
 d the Limnology & Marine Science Program. She holds an MS (2004) and a PhD
  (2009) in Civil & Environmental Engineering from the University of Califo
 rnia\, Berkeley\, and a BS (2003) in Environmental Engineering Science fro
 m Massachusetts Institute of Technology. Before joining the UW faculty\, C
 hristy completed a post-doc in the Institute for Biogeochemistry and Pollu
 tant Dynamics at the Swiss Federal Institute of Technology.\nAbstract:\nTh
 e lampricides\, 3-triflouromethyl-4-nitrophenol (TFM) and 5-chloro-N-(2-ch
 loro-4-nitrophenyl)-2-hydrobenzamide (niclosamide) have been intentionally
  added to tributaries of the Great Lakes since the 1950’s to kill the in
 vasive parasitic sea lamprey. In contrast to legacy contaminants and many 
 chemicals of emerging concern\, lampricides are directly added to the Grea
 t Lakes ecosystem. Despite their widespread and intentional use\, the fate
  of TFM and niclosamide in the environment is still poorly understood. We 
 performed laboratory experiments to assess the susceptibility of both comp
 ounds to direct and indirect photochemical degradation. While the direct p
 hotodegradation rates of TFM are orders of magnitude faster than those of 
 niclosamide\, both compounds eventually undergo dehalogenation during dire
 ct photolysis. The presence of dissolved organic matter increases the phot
 odegradation rate of niclosamide through the production of a series of rea
 ctive oxidants. In contrast\, TFM is not susceptible to indirect photolysi
 s. In addition\, we conducted two field campaigns to quantify TFM photolys
 is during lampricide applications in 2015 and 2016. From these two field c
 ampaigns we illustrate that TFM in both small and large systems may enter 
 the Great Lakes with minimal photodegradation\, which has important implic
 ations for Great Lakes ecosystems.\n 
LOCATION:GR C0 01 https://plan.epfl.ch/?room=GRC001
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR