From ceginfo@u.washington.edu Thu May 31 14:18:08 2001 Received: from jason01.u.washington.edu (root@jason01.u.washington.edu [140.142.8.10]) by lists.u.washington.edu (8.11.2+UW01.01/8.11.2+UW01.04) with ESMTP id f4VLHx017756 for ; Thu, 31 May 2001 14:18:03 -0700 Received: from homer22.u.washington.edu (ceginfo@homer22.u.washington.edu [140.142.8.22]) by jason01.u.washington.edu (8.11.2+UW01.01/8.11.2+UW01.04) with ESMTP id f4VLHtw17404 for ; Thu, 31 May 2001 14:17:56 -0700 Received: from localhost (ceginfo@localhost) by homer22.u.washington.edu (8.11.2+UW01.01/8.11.2+UW01.04) with ESMTP id f4VLHsM91020 for ; Thu, 31 May 2001 14:17:54 -0700 Date: Thu, 31 May 2001 14:17:54 -0700 (PDT) From: Civil and Environmental Engineering To: Subject: Rebekah Barker's thesis defense, Monday, June 4 Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Following is an announcement of Rebekah Barker's thesis defense Degree: MSE (thesis) Committee: Professor Gregory Korshin (chair) Professor Mark Benjamin Date: Monday, June 4, 2001 Time: 1:30 p.m. Place: 218 More Hall (Faculty Library) Thesis Title: Studies of the kinetics and mechanics of the chlorination of 3,5-dihydroxybenzoic acid Abstract: Since a nationwide water supply survey performed in the 1970s determined the ubiquity of chlorinated organics in disinfected drinking water, the specifics of the formation of these disinfection by-products (DBPs) have been the subject of scientific scrutiny. However, studies of the formation of DBPs in chlorinated water have largely ignored the intrinsic mechanisms of their formation and have not examined the initial fast phase of the halogenation reaction. This study specifically focuses on these overlooked areas of investigation. Due to the complexity of natural organic matter (NOM), 3,5-dihydroxybenzoic acid (DHBA) wasselected as a model compound representing reactive sites in NOM. Using a stopped-flow reactor, the mechanisms of the initial phases of DHBA chlorination were explored in detail. The response of the kinetics of the reactions to changing temperature and pH were also determined. This study primarily focused on the first DHBA chlorination step. However, limited work was also performed to examine the second and first step of DHBA chlorination and bromination, respectively. Carole McCutcheon for Marcia Buck Graduate Advising Office, More 201F Dept. of Civil & Environmental Engineering University of Washington Box 352700 Seattle, WA 98195-2700 (206) 543-2574 email: ceginfo@u.washington.edu .