Description:

A project is proposed that will study a wide-range of by-products resulting from the combined use of ozone (as a pre-oxidation treatment) with terminal disinfectants chlorine and chloramine. This study will first investigate new methodologies for targeting as yet unidentified by-products and then apply these as well as refined existing techniques for studying the impact of water quality parameters on the formation and stability of these compounds in distributed drinking waters. The objectives are, therefore, to investigate the relative occurrence of these by-products in treated drinking waters, and to determine water quality, treatment, and distribution system conditions which influence their relative concentrations. Their kinetics of formation and stability need to be characterized and in order to understand the underlying causes of the relative differences in by-product formation in different waters, a controlled study needs to be conducted in which the various contributory factors are investigated.

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Final Progress Report

1999 Progress Report

2001 Progress Report

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2000 Progress Report

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Record Details:

Record Type:PROJECT( ABSTRACT )

Start Date:11/01/1998

Completion Date:10/31/2001

Record ID: 18654

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Related Organizations:

Role :OWNER

Organization Name :UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL

Mailing Address :103 S Bldg Cb 9100

Citation :Chapel Hill

State :NC

Zip Code :27599

Project Information:

Approach :The pool of identifiable by-products resulting from the combined use of ozone and post-disinfectant will be expanded by targeting compounds observed in the literature from laboratory studies on synthetic solutions containing natural organic matter (NOM) in a variety of treatment scenarios. This research will utilize a combination of in-situ derivatization techniques in combination with solid phase extraction (particularly micro-extraction) to target a broad range of polar by-products produced by ozonation that might be subsequently chlorinated by post- disinfectant. Positive identification will be achieved by a combination of complimentary spectroscopic tools. Once the target by-products are established, studies of their formation and stability will be conducted both on a bench-scale and in the field, at actual full-scale treatment plants and their respective distribution systems. The study will have three components: (1) development of analytical methods for new ozonation by-products; (2) bench-scale, controlled, laboratory ozone/chlorination and ozone/ chloramination study using waters with differing NOM characteristics from different regions of the U.S. and ozonated/disinfected under a variety of solution conditions: (3) a full-scale plant study to assess the distribution and speciation of by- products in a variety of different waters from geographically diverse regions, with differing water quality, treatment, and distribution system characteristics.

Cost :$441,261.00

Research Component :Drinking Water

Risk Paradigm :EXPOSURE

Approach :The pool of identifiable by-products resulting from the combined use of ozone and post-disinfectant will be expanded by targeting compounds observed in the literature from laboratory studies on synthetic solutions containing natural organic matter (NOM) in a variety of treatment scenarios. This research will utilize a combination of in-situ derivatization techniques in combination with solid phase extraction (particularly micro-extraction) to target a broad range of polar by-products produced by ozonation that might be subsequently chlorinated by post- disinfectant. Positive identification will be achieved by a combination of complimentary spectroscopic tools. Once the target by-products are established, studies of their formation and stability will be conducted both on a bench-scale and in the field, at actual full-scale treatment plants and their respective distribution systems. The study will have three components: (1) development of analytical methods for new ozonation by-products; (2) bench-scale, controlled, laboratory ozone/chlorination and ozone/ chloramination study using waters with differing NOM characteristics from different regions of the U.S. and ozonated/disinfected under a variety of solution conditions: (3) a full-scale plant study to assess the distribution and speciation of by- products in a variety of different waters from geographically diverse regions, with differing water quality, treatment, and distribution system characteristics.

Cost :$441,261.00

Research Component :M/DBP (DBP)

Risk Paradigm :RISK MANAGEMENT

Approach :The pool of identifiable by-products resulting from the combined use of ozone and post-disinfectant will be expanded by targeting compounds observed in the literature from laboratory studies on synthetic solutions containing natural organic matter (NOM) in a variety of treatment scenarios. This research will utilize a combination of in-situ derivatization techniques in combination with solid phase extraction (particularly micro-extraction) to target a broad range of polar by-products produced by ozonation that might be subsequently chlorinated by post- disinfectant. Positive identification will be achieved by a combination of complimentary spectroscopic tools. Once the target by-products are established, studies of their formation and stability will be conducted both on a bench-scale and in the field, at actual full-scale treatment plants and their respective distribution systems. The study will have three components: (1) development of analytical methods for new ozonation by-products; (2) bench-scale, controlled, laboratory ozone/chlorination and ozone/ chloramination study using waters with differing NOM characteristics from different regions of the U.S. and ozonated/disinfected under a variety of solution conditions: (3) a full-scale plant study to assess the distribution and speciation of by- products in a variety of different waters from geographically diverse regions, with differing water quality, treatment, and distribution system characteristics.

Cost :$441,261.00

Research Component :ARSENIC

Risk Paradigm :RISK MANAGEMENT

Approach :The pool of identifiable by-products resulting from the combined use of ozone and post-disinfectant will be expanded by targeting compounds observed in the literature from laboratory studies on synthetic solutions containing natural organic matter (NOM) in a variety of treatment scenarios. This research will utilize a combination of in-situ derivatization techniques in combination with solid phase extraction (particularly micro-extraction) to target a broad range of polar by-products produced by ozonation that might be subsequently chlorinated by post- disinfectant. Positive identification will be achieved by a combination of complimentary spectroscopic tools. Once the target by-products are established, studies of their formation and stability will be conducted both on a bench-scale and in the field, at actual full-scale treatment plants and their respective distribution systems. The study will have three components: (1) development of analytical methods for new ozonation by-products; (2) bench-scale, controlled, laboratory ozone/chlorination and ozone/ chloramination study using waters with differing NOM characteristics from different regions of the U.S. and ozonated/disinfected under a variety of solution conditions: (3) a full-scale plant study to assess the distribution and speciation of by- products in a variety of different waters from geographically diverse regions, with differing water quality, treatment, and distribution system characteristics.

Cost :$441,261.00

Research Component :Drinking Water

Risk Paradigm :RISK MANAGEMENT

Approach :The pool of identifiable by-products resulting from the combined use of ozone and post-disinfectant will be expanded by targeting compounds observed in the literature from laboratory studies on synthetic solutions containing natural organic matter (NOM) in a variety of treatment scenarios. This research will utilize a combination of in-situ derivatization techniques in combination with solid phase extraction (particularly micro-extraction) to target a broad range of polar by-products produced by ozonation that might be subsequently chlorinated by post- disinfectant. Positive identification will be achieved by a combination of complimentary spectroscopic tools. Once the target by-products are established, studies of their formation and stability will be conducted both on a bench-scale and in the field, at actual full-scale treatment plants and their respective distribution systems. The study will have three components: (1) development of analytical methods for new ozonation by-products; (2) bench-scale, controlled, laboratory ozone/chlorination and ozone/ chloramination study using waters with differing NOM characteristics from different regions of the U.S. and ozonated/disinfected under a variety of solution conditions: (3) a full-scale plant study to assess the distribution and speciation of by- products in a variety of different waters from geographically diverse regions, with differing water quality, treatment, and distribution system characteristics.

Cost :$441,261.00

Research Component :M/DBP (DBP)

Risk Paradigm :EXPOSURE

Approach :The pool of identifiable by-products resulting from the combined use of ozone and post-disinfectant will be expanded by targeting compounds observed in the literature from laboratory studies on synthetic solutions containing natural organic matter (NOM) in a variety of treatment scenarios. This research will utilize a combination of in-situ derivatization techniques in combination with solid phase extraction (particularly micro-extraction) to target a broad range of polar by-products produced by ozonation that might be subsequently chlorinated by post- disinfectant. Positive identification will be achieved by a combination of complimentary spectroscopic tools. Once the target by-products are established, studies of their formation and stability will be conducted both on a bench-scale and in the field, at actual full-scale treatment plants and their respective distribution systems. The study will have three components: (1) development of analytical methods for new ozonation by-products; (2) bench-scale, controlled, laboratory ozone/chlorination and ozone/ chloramination study using waters with differing NOM characteristics from different regions of the U.S. and ozonated/disinfected under a variety of solution conditions: (3) a full-scale plant study to assess the distribution and speciation of by- products in a variety of different waters from geographically diverse regions, with differing water quality, treatment, and distribution system characteristics.

Cost :$441,261.00

Research Component :ARSENIC

Risk Paradigm :EXPOSURE

Project IDs:

ID Code :R826833

Project type :EPA Grant