WorldCat Identities

Villars, Kathryn E.

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Works: 1 works in 1 publications in 1 language and 1 library holdings
Roles: Author
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Most widely held works by Kathryn E Villars
Removal of microcystin-LR from drinking water using granular activated carbon by Kathryn E Villars( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

From the results it appears that material type does have an effect on the adsorption capacity; however, other factors such as activation method likely also have an influence. The addition of 5mg/L Suwannee River Fulvic Acid as competitive NOM decreased the maximum adsorption capacity for the GAC products tested as expected. MC-LR breakthrough exceeded the Ohio EPA action level of 0.3 µg/L MC-LR for bituminous coal, lignite and hardwood GAC in 1000, 9700, and 9800 treated bed volumes respectively, and the MC-LR breakthrough curve was most gradual for the wood based GAC and steepest for the bituminous coal based GAC. The varying pH trial was conducted on the bituminous product only and the volume treated prior to breakthrough for MC-LR was similar at the 1.6 µg/L MC-LR Ohio EPA action level (1600 to 1900 bed volumes). However, the slope of the pH 9.5 curve was more gradual than the pH 7.8 curve likely due to decreased interaction between the GAC and competitive NOM. Any interpretation of these reported full scale breakthrough times must consider that this study was conducted at an unrealistically high influent MC-LR concentration (100µg/L) in order to obtain quantifiable data. These findings indicate that the most commonly used GAC media in Ohio (bituminous coal) is not as effective as other source material carbons for removal of MC-LR and that some lignite products may be comparable with wood. However, this cannot be extrapolated to its suitability for other contaminants of concern such as MIB, geosmin, disinfection byproduct precursors or other organic molecules, and further, there are operational reasons for public utilities to choose a particular manufacturer
 
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