Laboratory study on the interaction between herbicide MCPA and two different soils

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Title:Laboratory study on the interaction between herbicide MCPA and two different soils
Creators:
Hiller, Edgar; hiller at fns dot uniba dot sk; Comenius University Bratislava, Faculty of Natural Sciences, Department of Geochemistry, Mlynská dolina, 842 15 Bratislava, Slovak Republic
Dubovský, Dávid; Water Research Institute Bratislava, Department of Water Quality and Water Treatment Technology, Nabr. L. Svobodu 5, 812 49 Bratislava, Slovak Republic
Bartal', Mikuláš; Water Research Institute Bratislava, National Water Reference Laboratory for Slovakia, Nabr. L. Svobodu 5, 812 49 Bratislava, Slovak Republic
Zemanová, Lenka; Comenius University Bratislava, Faculty of Natural Sciences, Department of Geochemistry, Mlynská dolina, 842 15 Bratislava, Slovak Republic
Khun, Miloslav; Comenius University Bratislava, Faculty of Natural Sciences, Department of Geochemistry, Mlynská dolina, 842 15 Bratislava, Slovak Republic
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 54, 4, pp. 320-329
Uncontrolled Keywords:Degradation, Sorption, Desorption, MCPA, Soil

Abstract

Acidic herbicide MCPA (4-chloro-2-methylphenoxyacetic acid) is applied to post-emergence control of annual and perennial broad-leaved weeds, mostly in cereals. This study was undertaken with two soils of different properties sampled from two soil horizons to determine the extent of degradation, sorption and desorption of MCPA. These processes are the most important to evaluate the fate of the herbicide in soil and its potential to leach from soil into groundwater. Two soils were used: a calcareous, sandy-loam soil with organic carbon content of 2.486 % (Pararendzina) taken from surface A horizon (the A topsoil) and a calcareous, loamy-sand soil with organic C content of 0.600 % (Fluvisol) sampled from subsurface C horizon (the C subsoil). The extent of degradation, sorption and desorption of MCPA were measured in laboratory batch experiments. Degradation followed first-order kinetics, with the MCPA half-lives of 11 and 24 d for the A topsoil and C subsoil, respectively. Soil organic carbon influenced MCPA degradation. Sorption followed a Freundlich isotherm equation and linear isotherm equation, as well. The distribution coefficient KD was higher in the A topsoil (0.387 l kg-1) than in the C subsoil (0.165 l kg-1), consistent with the higher organic C content of the A soil. The results indicate that MCPA is potentially mobile and might pose a threat to future groundwater quality due to its low sorption, relatively high water solubility and slow degradation in the C subsoil.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Laboratory study on the interaction between herbicide MCPA and two different soils
Translated title:Laboratórne štúdium interakcií medzi herbicídom MCPA a dvoma rozdielnymi pôdami
Creators:
Hiller, Edgar; hiller at fns dot uniba dot sk; Comenius University Bratislava, Faculty of Natural Sciences, Department of Geochemistry, Mlynská dolina, 842 15 Bratislava, Slovak Republic
Dubovský, Dávid; Water Research Institute Bratislava, Department of Water Quality and Water Treatment Technology, Nabr. L. Svobodu 5, 812 49 Bratislava, Slovak Republic
Bartal', Mikuláš; Water Research Institute Bratislava, National Water Reference Laboratory for Slovakia, Nabr. L. Svobodu 5, 812 49 Bratislava, Slovak Republic
Zemanová, Lenka; Comenius University Bratislava, Faculty of Natural Sciences, Department of Geochemistry, Mlynská dolina, 842 15 Bratislava, Slovak Republic
Khun, Miloslav; Comenius University Bratislava, Faculty of Natural Sciences, Department of Geochemistry, Mlynská dolina, 842 15 Bratislava, Slovak Republic
Uncontrolled Keywords:Degradation, Sorption, Desorption, MCPA, Soil
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:54
Number:4
Page Range:pp. 320-329
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:5935
Item Type:Article
Deposited On:11 Jun 2010 14:44
Last Modified:11 Jun 2010 12:44

Citation

Hiller, Edgar; Dubovský, Dávid; Bartal', Mikuláš; Zemanová, Lenka; Khun, Miloslav (2006) Laboratory study on the interaction between herbicide MCPA and two different soils. Journal of Hydrology and Hydromechanics, 54 (4). pp. 320-329. ISSN 0042-790X

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