• AWWA WQTC65933
Provide PDF Format

Learn More

AWWA WQTC65933

  • Screening Study and Byproduct Determination for Pesticide Degradation during Disinfection in Water Treatment
  • Conference Proceeding by American Water Works Association, 11/01/2007
  • Publisher: AWWA

$12.00$24.00


This study identifies combinations of over 60 pesticides and 8 common disinfectants (orconditions) including free chlorine, monochloramine, chlorine dioxide, permanganate, ozone,hydrogen peroxide, photo-oxidation with UV at 254 nm, and hydrolysis at pH 2, pH 7, and pH12, that exhibit the potential for pesticide degradate formation. Initial parent pesticideconcentrations were less than 25 µg/L, and treatment dosages were on the order of typicalexposures used during water treatment. The reaction media was buffered Milli-Q water adjustedto pH 6.6 and 8.6. The reactivity of pesticide/oxidant pairs were categorized as "highly reactive"(>50% parent removal), "moderately reactive" (20-50% parent removal), and "slightly reactive"(<20% parent removal). The screening study results indicate the most reactive combinations oftransformation agents and pesticides leading to degradates formation in water utilities. Basedupon exposure (e.g., occurrence, usage), reactivity, toxicity and other criteria, several of the mostimportant systems were studied in detail. The identity and pathway of the major metaboliteswere determined using Ion Trap LC/MS, GC/MS, and other techniques. The data presentedhelps identify situations of potentially harmful pesticide degradate formation in commondrinking water treatment systems. Includes 19 references, table.

Related Products

AWWA MTC53745

AWWA MTC53745

Implementation of a 25 MGD Immersed Membrane Filtration Plant: The Olivenhain Municipal Water Distri..

$12.00 $24.00

AWWA MTC69659

AWWA MTC69659

Low Pressure Reverse Osmosis and Donnan Dialysis for Simultaneous Removal of Nitrate and Perchlorate..

$12.00 $24.00

AWWA IMTECH57850

AWWA IMTECH57850

Integrating Information Technology to Optimize Unidirectional Flushing..

$12.00 $24.00

AWWA CSC95013

AWWA CSC95013

Networking the Water Production Division..

$12.00 $24.00