Fast detection and formation of polar-iodinated disinfection byproducts in drinking water

ENVR 273

Guoyu Ding, dguoyu@ust.hk, Department of Civil Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, Hong Kong and Xiangru Zhang, xiangru@ust.hk, Department of Civil Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong, China.
A few iodinated disinfection byproducts (DBPs), due to the presence of iodide in raw water, have been discovered in several drinking water treatment plants. Recent evidence has shown that iodinated DBPs seem to be more cytotoxic and carcinogenic than their chlorinated and brominated analogues. Due to the high atomic weight of iodine, most of iodinated DBPs are believed to be polar compounds and most of them are still unknown. In this work, a method for fast selective detection of polar iodinated DBPs was developed by using the unique function, 'precursor ion scan', in triple quadrupole mass spectrometry. This method was then applied for the selective detection of polar-iodinated DBPs from chlorination/chloramination of a simulated raw water containing iodide. Some new iodinated DBPs were found and their tentative structures were proposed. The mechanism for the formation of these iodinated DBPs was discussed.
 

Advances in Drinking Water Disinfection and Disinfection Byproduct Management
6:00 PM-8:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster

Division of Environmental Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008