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Title: Catchment influences on dissolved organic carbon concentration and character : implications for potable water treatment and trihalomethane control
Author: Gough, Rachel
ISNI:       0000 0004 5365 5289
Awarding Body: Prifysgol Bangor University
Current Institution: Bangor University
Date of Award: 2014
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The presence of dissolved organic carbon (DOC) in raw water can cause a number of issues iC potable water treatment due to its effect on aesthetic, chemical and biological water quality parameters. Of particular concern is the role of Doe as a precursor to potentially harmful disinfection by-products (DBPs), most notably haloacetic acids (HAAs) and trihalomethanes (THMs), which are formed during the chlorination of natural waters. Rising concentrations of Doe in surface waters draining upland catchments have been reported in the past few decades. This is a major concern for drinking water companies in these areas given the regulatory requirement to maintain THM concentrations below maximum permissible levels. Coagulation-flocculation is recognised as the most effective means of removing Doe from raw water during potable water treatment and controlling the formation of THMs in finished water. The present study is focussed on upland drinking water reservoir catchments in the North Wales area. In this area many catchments comprise extensive areas of forest and peatland coverage, both of which have been associated with high DOC loading of surface waters. In this study the concentration and character of leachable DOC was compared in soils derived from different habitats in order to assess the effect of habitat type (beech, spruce, larch and pine forests and blanket peat) on Doe treatability and THM formation potential (THMFP). Significant differences were identified between different habitats, with the beech habitat identified as most appropriate for drinking water catchments due to it having relatively low leachate DOC concentration, THMFP and colour.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available