Sorpcia a desorpcia herbicídu MCPA v pôdach a sedimentoch

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Title:Sorpcia a desorpcia herbicídu MCPA v pôdach a sedimentoch
Creators:
Hiller, Edgar; hiller at fns dot uniba dot sk; Univerzita Komenského, Prírodovedecká fakulta, Katedra geochémie, Mlynská dolina, 842 15 Bratislava, Slovenská republika
Sirotiak, Maroš; Slovenská technická univerzita Trnava, Materiálovotechnologická fakulta, Katedra environmentálneho a bezpečnostného inžinierstva, Botanická 49, 917 24 Trnava, Slovenská republika
Zemanová, Lenka; Univerzita Komenského, Prírodovedecká fakulta, Katedra geochémie, Mlynská dolina, 842 15 Bratislava, Slovenská republika
Bartal', Mikuláš; Národné referenčné laboratórium, Výskumný ústav vodného hospodárstva, Nábr. L. Svobodu 5, 812 49 Bratislava 1, Slovenská republika
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 54, 1, pp. 71-80
Uncontrolled Keywords:Sorption, Desorption, Herbicide, MCPA, Soil

Abstract

We investigated the sorption-desorption behaviour of acid herbicide MCPA (4-chloro-2-methylphenoxy acetic acid) in five soils (denoted as A1-5), three bottom sediments (S1-3) and in two river sediments (L1-2) at two initial concentrations in aqueous solution – C0 = 0.5 and 10 mg L-1. Sorption and desorption of MCPA was measured by a batch equilibrium technique using analytical pure MCPA. There was no significant influence of the initial concentration of MCPA on its equilibrium distribution between soil/sediment and aqueous solution. The difference between distribution coefficient KD at C0 = 0.5 mg L-1 and KD at C0 = 10 mg L-1 was found only in the case of one bottom sediment (S2). Simple regression analysis between KD at C0 = 0.5 and 10 mg L-1 and soil/sediment properties indicated that the most important property which determined the variation in MCPA sorption is organic carbon (r = 0.885** and r = 0.921***, respectively). Similarly, the desorption of MCPA was inversely proportional to organic carbon content of the soils and sediments used (r = –0.821* and r = –0.888**). These observations showed that sorption-desorption behaviour of MCPA in soils and sediments was primarily controlled by organic components of the geosorbents used. Overall, the sorption extent of MCPA in soils and sediments was low (P sorp ≈ 5 – 53 %; KD = 0.131 – 2.827 L kg-1) and desorption extent was relatively high (P des ≈ 11 – 52 %), especially in soils and sediments with the lower organic carbon content. The experimental results and calculated values of groundwater ubiquity score GUS and relative leaching potential index RLPI imply that MCPA is very mobile in all soils and has high potential to contaminate groundwater.

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Title:Sorpcia a desorpcia herbicídu MCPA v pôdach a sedimentoch
Translated title:Sorption and desorption of herbicide MCPA in soils and sediments
Creators:
Hiller, Edgar; hiller at fns dot uniba dot sk; Univerzita Komenského, Prírodovedecká fakulta, Katedra geochémie, Mlynská dolina, 842 15 Bratislava, Slovenská republika
Sirotiak, Maroš; Slovenská technická univerzita Trnava, Materiálovotechnologická fakulta, Katedra environmentálneho a bezpečnostného inžinierstva, Botanická 49, 917 24 Trnava, Slovenská republika
Zemanová, Lenka; Univerzita Komenského, Prírodovedecká fakulta, Katedra geochémie, Mlynská dolina, 842 15 Bratislava, Slovenská republika
Bartal', Mikuláš; Národné referenčné laboratórium, Výskumný ústav vodného hospodárstva, Nábr. L. Svobodu 5, 812 49 Bratislava 1, Slovenská republika
Uncontrolled Keywords:Sorption, Desorption, Herbicide, 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:1
Page Range:pp. 71-80
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:5906
Item Type:Article
Deposited On:08 Jun 2010 16:48
Last Modified:08 Jun 2010 14:48

Citation

Hiller, Edgar; Sirotiak, Maroš; Zemanová, Lenka; Bartal', Mikuláš (2006) Sorpcia a desorpcia herbicídu MCPA v pôdach a sedimentoch. Journal of Hydrology and Hydromechanics, 54 (1). pp. 71-80. ISSN 0042-790X

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