BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Arsenic Levels in Drinking Waters of Emet-Kütahya – Turkey and 
 its Relation to Arsenic Bearing Minerals in Borate Deposits. - Emeritus Pr
 ofessor Nazmi Oruc (Environmental Protection Association\, Eskişehir-Turk
 ey)
DTSTART:20090425T151500Z
DTEND:20090425T163000Z
UID:TALK18556@talks.cam.ac.uk
DESCRIPTION:The largest colemanite reserves occur around the Emet Town whi
 ch is located in the midwest of the Anatolia. Two natural spring water sou
 rces (Malı 1 and Malı 2) were supplied to the town (population of 20 000
 ) about 18 years ago.\n\n|Source|Sample size|Min.|Max.|Med.|MCL|\n|Malı 1
 .|(n=8)|150|634|448|50(1984)|\n|Malı 2.|(n=9)|48|633|384|10(1997)|\n\n_Ar
 senic Levels (microgram/L)_\n\nThe above results indicated that these two 
 natural water sources contained much higher levels of arsenic than MCL set
  in Turkey. In 1997 the MCL was lowered to 10 microgram/L\, from the 50 mi
 crogram/L\, standard established in 1984. Hence\, use of these waters was 
 prohibited on Oct. 2001. It was reported in the literature that geochemica
 l examinations of the Emet borate deposits contained As and S bearing mine
 rals such as: realgar (AsS) and orpiment (As2S3) as scattered nodules in t
 he colemanite formations. Consequently high levels of As in the natural wa
 ters were considered to be associated with the dissolution of these minera
 ls occurring in the Emet water catchment area.
LOCATION:Room R5 Emmanuel College
END:VEVENT
END:VCALENDAR