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UV-H"2O"2 based AOP and its integration with biological activated carbon treatment for DBP reduction in drinking water [An article from: Chemosphere]
Book Details
Author(s)R. Toor, M. Mohseni
PublisherElsevier
ISBN / ASINB000PDSK36
ISBN-13978B000PDSK33
MarketplaceFrance 🇫🇷
Description
This digital document is a journal article from Chemosphere, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The presence of disinfection byproducts (DBPs) such as trihalomethanes (THMs) and haloacetic acids (HAAs) in drinking water is of great concern due to their adverse effects on human health. Emerging regulation limiting the concentration of DBPs in drinking water has increased demands for technologies and processes which reduce the formation of DBPs in drinking water. In this study, UV-H"2O"2 based advance oxidation process (AOP) was used to treat raw surface water. Experiments were conducted using low pressure mercury vapor UV lamps in collimated beam and flow-through annular photoreactors. The effect of UV fluence (0-3500mJcm^-^2) and hydrogen peroxide concentration (0-23mgl^-^1) in reducing the concentration of THMs and HAAs was examined. The UV-H"2O"2 AOP was then coupled with a downstream biological activated carbon (BAC) treatment to assess the synergetic benefits of combining the two treatments. It was observed that UV-H"2O"2 AOP was only effective at reducing DBPs at UV fluences of more than 1000mJcm^-^2and initial H"2O"2 concentrations of about or greater than 23mgl^-^1. However, the combined AOP-BAC treatment showed significant reductions of 43%, 52%, and 59% relative to untreated raw water for DBPs, TOC, and UV"2"5"4, respectively.
Description:
The presence of disinfection byproducts (DBPs) such as trihalomethanes (THMs) and haloacetic acids (HAAs) in drinking water is of great concern due to their adverse effects on human health. Emerging regulation limiting the concentration of DBPs in drinking water has increased demands for technologies and processes which reduce the formation of DBPs in drinking water. In this study, UV-H"2O"2 based advance oxidation process (AOP) was used to treat raw surface water. Experiments were conducted using low pressure mercury vapor UV lamps in collimated beam and flow-through annular photoreactors. The effect of UV fluence (0-3500mJcm^-^2) and hydrogen peroxide concentration (0-23mgl^-^1) in reducing the concentration of THMs and HAAs was examined. The UV-H"2O"2 AOP was then coupled with a downstream biological activated carbon (BAC) treatment to assess the synergetic benefits of combining the two treatments. It was observed that UV-H"2O"2 AOP was only effective at reducing DBPs at UV fluences of more than 1000mJcm^-^2and initial H"2O"2 concentrations of about or greater than 23mgl^-^1. However, the combined AOP-BAC treatment showed significant reductions of 43%, 52%, and 59% relative to untreated raw water for DBPs, TOC, and UV"2"5"4, respectively.
