Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/17759
Title: Environmental fate of triasulfuron in soils amended with municipal waste compost
Authors: Said-Pullicino, Daniel
Gigliotti, Giovanni
Vella, Alfred J.
Keywords: Municipal solid waste incinerator residues
Compost
Adsorption
Environmental testing
Carboxylic acids
Soil pollution
Issue Date: 2004
Publisher: ASA/CSSA/SSSA
Citation: Said-Pullicino, D., Gigliotti, G., & Vella, A. J. (2004). Environmental fate of triasulfuron in soils amended with municipal waste compost. Journal of Environmental Quality, 33(5), 1743-1751.
Abstract: The amendment of soil with compost may significantly influence the mobility and persistence of pesticides and thus affect their environmental fate. Factors like adsorption, kinetics, and rate of degradation of pesticides could be altered in amended soils. The aim of this study was to determine the effects of the addition of compost made from source-separated municipal waste and green waste, on the fate of triasulfuron [(2-(2-chloroethoxy)-N-[[4-methoxy-6-methyl- 1,3,5-triazin-2-yl)amino] carbonyl]benzenesulfonamide], a sulfonylurea herbicide used in postemergence treatment of cereals. Two native soils with low organic matter content were used. A series of analyses was performed to evaluate the adsorption and degradation of the herbicide in soil and in solution after the addition of compost and compost-extracted organic fractions, namely humic acids (HA), fulvic acids (FA), and hydrophobic dissolved organic matter (HoDOM). Results have shown that the adsorption of triasulfuron to soil increases in the presence of compost, and that the HA and HoDOM fractions are mainly responsible for this increase. Hydrophobic dissolved organic matter applied to the soils underwent sorption reactions with the soils, and in the sorbed state, served to increase the adsorption capacity of the soil for triasulfuron. The rate of hydrolysis of triasulfuron in solution was significantly higher at acidic pH and the presence of organic matter fractions extracted from compost also slightly increased the rate of hydrolysis. The rate of degradation in amended and nonamended soils is explained by a two-stage degradation kinetics. During the initial phase, although triasulfuron degradation was rapid with a half-life of approximately 30 d, the presence of compost and HoDOM was found to slightly reduce the rate of degradation with respect to that in nonamended soil.
Description: This work was partially supported by the Leonardo da Vinci 2001. Degradation of imazosulfuron in soil. Pest Manage. Sci. program of the European Commission as part of the project 57:360–365. Pichon, V., C. Cau Dit Coumes, L. Chen, S. Guenu, and M.-C. Hen- ISDEPS 2002.
URI: https://www.um.edu.mt/library/oar//handle/123456789/17759
ISSN: 00472425
Appears in Collections:Scholarly Works - FacSciChe

Files in This Item:
File Description SizeFormat 
Environmental Fate of Triasulfuron in Soils Amended with Municipal Waste Compost.pdf205.17 kBAdobe PDFView/Open


Items in OAR@UM are protected by copyright, with all rights reserved, unless otherwise indicated.