Skip to main content

Catalytic effect of dissolved humic acids on the chemical degradation of phenylurea herbicides

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.


Although biodegradation seems to be the main cause of herbicide degradation, abiotic degradation can also be important for chemicals such as phenylureas, which are subject to catalysed soil reactions. The aim of this work is to investigate the effect of dissolved humic acids (HAs), normally present in natural waters, on the hydrolysis of phenylurea herbicides, and it presents a kinetic model that takes into account the role of adsorption.


The linearity of the adsorption isotherms indicates that phenylurea–humic acid interaction can be considered in terms of a repartition‐like equilibrium of phenylurea between water and HAs. Kinetic experiments show that the degradation rates of phenylureas increase with HA concentration.


The kinetic equation adopted adequately describes the experimental data trend, allowing the evaluation of the catalytic effect of HAs on the chemical degradation of phenylureas. Carboxyl groups of HAs seem to play a leading role in the catalysis. The kinetic equation derived in this work could be helpful in predicting the persistence of phenylureas and of related compounds in natural water. Copyright © 2008 Society of Chemical Industry
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Keywords: abiotic degradation; adsorption; humic acids; kinetic equation; phenylureas

Document Type: Research Article

Publication date: 2008-07-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more