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Walter Giger
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Walter Giger : ウィキペディア英語版
Walter Giger
Walter Giger (born September 6, 1943 in Zürich) is a Swiss chemist. He had been working at the Swiss Federal Institute of Aquatic Science and Technology (Eawag), where he was the head of the division ''Chemische Problemstoffe''. He has been a professor for environmental chemistry at the ETH Zurich since 1995.
Giger is a pioneer who advanced the field of trace organic analysis and its application to significant environmental problems.〔Jennifer A. Field, Robert P. Eganhouse: ''In honor of Walter Giger: setting standards of excellence in environmental organic chemistry''. Environmental Science & Technology, 42(17), 2008, 〕 His research topics include development of analytical techniques for identification of organic pollutants in drinking water, wastewater and natural waters. He investigates their sources, occurrence and fate. In 1984, he discovered that in wastewater treatment plants nonylphenol ethoxylates are transformed to 4-nonylphenols, which are toxic to aquatic life.〔W. Giger, P. H. Brunner, C. Schaffner: ''4-Nonylphenol in sewage sludge: accumulation of toxic metabolites from nonionic surfactants''. Science, 225(4662), 1984, 623–625, 〕 After several additional studies the use of nonylphenols and nonylphenol ethoxylates was restricted in the European Union in 2003.〔Official Journal of the European Union: (DIRECTIVE 2003/53/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 18 June 2003 amending for the 26th time Council Directive 76/769/EEC relating to restrictions on the marketing and use of certain dangerous substances and preparations (nonylphenol, nonylphenol ethoxylate and cement) ), July 17, 2003〕
== Scientific career ==
Giger received his PhD in chemistry from ETH Zurich in 1971.〔Walter Giger: ''Beitrag zur Stickstoff-14-Kernresonanzspektroskopie'', 1971, Diss. ETH Zürich, No. 4691; , ISBN 3-260-03071-9.〕 In 1972, he was a Postdoc at the Woods Hole Oceanographic Institution. In the same year, he took a new place of employment at the Eawag in Dübendorf and stayed there till his retirement. In the meantime, he was visiting scientist at the Stanford University and lecturer at the Universität Karlsruhe. In 2002, he became a member of the ''ISI Highly Cited Researchers Database''.〔(【引用サイトリンク】url=http://hcr3.isiknowledge.com/author.cgi?&link1=Search&link2=Search%20Results&AuthLastName=Giger&AuthFirstName=Walter&AuthMiddleName=&AuthMailnstName=&CountryID=-1&DisciplineID=0&id=934 )
In September 2008, the journal Environmental Science & Technology dedicated a special issue to him.〔(Environmental Science & Technology, 42(17), 2008 ) („Walter Giger Tribute“)〕

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