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xxvi

CONTENTS

Health and Safety for Water And Wastewater UV Systems

General 966 UV Light Exposure 967 Perform a UV Safety Audit 968 Acute Health Effects of UV Exposure Chronic Health Effects of UV Exposure Engineering Controls 969 Administrative Controls 969 Personal Protection 969 References 970

968 969

18 Advanced Oxidation Processes Introduction 976

Historical Perspective Types of AOPs 977

976

Chemistry of AOPs 977 Ozone Decomposition Initiated by Hydroxide

978

O 3 / H 2 O 2 O 3 / 979 979 U V H 2 O 2 / U V 979

F e ( I I ) / H 2 (Fenton Reaction) 980 O F 2 e ( I I ) / H 2 O 2 / U V ( P h o t o - F e n t o n R e a c t i o n )

980

T i O 2 / U V T i O 2 / H 2 O 2 / U V 981

981

Uses in Drinking Water and Wastewater Treatment

982

Oxidation of VOCs 982 Oxidation of Pesticides 985 Oxidation of Taste and Odor Compounds 988 Oxidation of Disinfection By-Product (DBP) Precursors

Factors Affecting System Performance

990

O 3 / H 2 O 2 O 3 / 990 991 U V H 2 O 2 / U V 992

Fenton and Photo-Fenton Reactions

992

TiO2/UV 993

Regulations 994 Equipment and Generation References 997

995

Appendix Index

966

989

976

1003 1009

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