![Oxidation of pesticides by in situ electrogenerated hydrogen peroxide: Study for the degradation of 2,4-dichlorophenoxyacetic acid [An article from: Journal of Hazardous Materials]](https://www.ebooknetworking.net/books/B00/0PA/bigB000PAUAIM.jpg)
Oxidation of pesticides by in situ electrogenerated hydrogen peroxide: Study for the degradation of 2,4-dichlorophenoxyacetic acid [An article from: Journal of Hazardous Materials]
Book Details
PublisherElsevier
ISBN / ASINB000PAUAIM
ISBN-13978B000PAUAI2
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2006. 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:
This paper reports an investigation on the performance of the H"2O"2 electrogeneration process on a rotating RVC cylinder cathode, and the optimization of the O"2 reduction rate relative to cell potential. A study for the simultaneous oxidation of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) by the in situ electrogenerated H"2O"2 is also reported. Experiments were performed in 0.3M of K"2SO"4, pH of 10 and 3.5. Oxygen concentration in solution was kept in 25mgL^-^1. Maximum hydrogen peroxide generation rate was reached at -1.6V versus SCE for both, acidic and alkaline solutions. Then, 100mgL^-^1 of 2,4-D was added to the solution. First order apparent rate constants for 2,4-D degradation ranged from 0.9 to 6.3x10^-^5ms^-^1, depending on the catalyst used (UV or UV+Fe(II)). TOC reduction was favored in acidic medium where a decreasing of 69% of the initial concentration was observed in the process catalyzed by UV+Fe(II). This figure was an indication that some of the intermediates derived from 2,4-D decomposition remained in solution, mainly as lighter aliphatic compounds.
Description:
This paper reports an investigation on the performance of the H"2O"2 electrogeneration process on a rotating RVC cylinder cathode, and the optimization of the O"2 reduction rate relative to cell potential. A study for the simultaneous oxidation of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) by the in situ electrogenerated H"2O"2 is also reported. Experiments were performed in 0.3M of K"2SO"4, pH of 10 and 3.5. Oxygen concentration in solution was kept in 25mgL^-^1. Maximum hydrogen peroxide generation rate was reached at -1.6V versus SCE for both, acidic and alkaline solutions. Then, 100mgL^-^1 of 2,4-D was added to the solution. First order apparent rate constants for 2,4-D degradation ranged from 0.9 to 6.3x10^-^5ms^-^1, depending on the catalyst used (UV or UV+Fe(II)). TOC reduction was favored in acidic medium where a decreasing of 69% of the initial concentration was observed in the process catalyzed by UV+Fe(II). This figure was an indication that some of the intermediates derived from 2,4-D decomposition remained in solution, mainly as lighter aliphatic compounds.
