fulltext.study @t Gmail

Photodegrading properties of soil humic acids fractionated by SEC-PAGE set-up. Are they connected with absorbance?

Paper ID Volume ID Publish Year Pages File Format Full-Text
29271 44143 2007 6 PDF Available
Title
Photodegrading properties of soil humic acids fractionated by SEC-PAGE set-up. Are they connected with absorbance?
Abstract

Humic acids (HAs) extracted from soils of different origins were fractionated using size exclusion chromatography-polyacrylamide gel electrophoresis set-up. For each HAs, three fractions showing distinct electrophoretic mobilities and molecular sizes (MS) were obtained. Bulk HAs and their fractions (25 mg L−1) were then compared for their ability to photosensitize the degradation of 2,4,6-trimethylphenol upon irradiation at 365 nm. Rate coefficients were deduced from pseudo-first order kinetics. For five of the six series, the rate coefficient varied in the order: high MS < medium MS < low MS. Except for one HA, the general tendency was a linear increase of the rate coefficient with 1–10−A, where A is the absorbance of HAs or fractions solution at 365 nm. It is an indication that the ratio of photosensitizing to non-photosensitizing chromophores is roughly constant among fractions.

Keywords
Humic substances; Chromophores; Sensitization; Pollutants degradation
First Page Preview
Photodegrading properties of soil humic acids fractionated by SEC-PAGE set-up. Are they connected with absorbance?
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 189, Issues 2–3, 25 June 2007, Pages 247–252
Authors
, , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us