Erratum to “Fate of seven pesticides in an aerobic aquifer studied in column experiments” [Chemosphere 41 (2000) 1485–1494]

Tuxen, Nina; Tüchsen, Peter L.; Rügge, Kirsten; Albrechtsen, Hans‐Jørgen; Bjerg, Poul Løgstrup

doi:10.1016/s0045-6535(00)00533-6

Cited by 2 publications

(2 citation statements)

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“…Oxygen, pH, conductivity, and temperature were measured in the field by electrodes in a small flow cell, and alkalinity was measured by a Gran titration. Nitrate, sulfate, and chlorine were analyzed on a Dionex ion chromatograph DX120 (25). Ammonium was quantified by standard autoanalyzer routines (Technicon AutoAnalyser II) (26), while total organic carbon was quantified on a model 700 TOC analyzer.…”

Section: Methodsmentioning

confidence: 99%

Shifts in Biodegradation Kinetics of the Herbicides MCPP and 2,4-D at Low Concentrations in Aerobic Aquifer Materials

Toräng

Nyholm

Albrechtsen

2003

Environ. Sci. Technol.

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Biodegradation kinetics of two phenoxy acid herbicides, MCPP [(+/-)-2-(4-chloro-2-methylphenoxy)propanoic acid; mecoprop] and 2,4-D [2,4-dichlorophenoxyacetic acid] were studied in laboratory batch microcosms at low concentrations (0.025-100 microg/L) using 14C technique with sediments and groundwater from a shallow aerobic sandy aquifer. Below a certain threshold concentration of approximately 1 microg/L for 2,4-D and 10 microg/L for MCPP, the biodegradation followed first-order nongrowth kinetics, and no adaptation was observed within the experimental period of 341 d. Half-lifes for ultimate degradation were 500 d for 2,4-D and 1100 d for MCPP at 10 degrees C in unpolluted aquifer sediment in this environmentally relevant concentration regime. Above the threshold concentrations, the biodegradation rate accelerated gradually due to selective growth of specific biomass, which was ascertained from 14C most probable number enumerations of specific phenoxy acid degraders. Atthe highest concentration tested (100 microg/ L), specific degraders increased from 10(-1) to 10(5) cells/g during the experiment, and half-lifes after adaptation decreased to approximately 5 d. The enhanced rate of degradation by adapted systems was maintained during degradation of the last residuals measured to less than 0.1 microg/L. In situ long-term preexposure of the aquifer sediment also resulted in significant higher degradation rates of the phenoxy acids.

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Section: Methodsmentioning

confidence: 99%

Shifts in Biodegradation Kinetics of the Herbicides MCPP and 2,4-D at Low Concentrations in Aerobic Aquifer Materials

Toräng

Nyholm

Albrechtsen

2003

Environ. Sci. Technol.

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“…From these results, it could be assumed that the capabilities of the microbial communities of the two soils to mineralize this compound are more important than the mentioned abiotic soil properties. Differences in the mineralization of isoproturon in soils are well-documented (19,45,46,(48)(49)(50)(51); soil microorganisms with a different capability for isoproturon mineralization (45,46,52) were already identified. Beside the results of the abiotic and the biotic degradation studies, the different pattern of the metabolites in the two soils under laboratory and outdoor conditions (Table 2) might be an additional indicator for different microbial communities.…”

Section: Resultsmentioning

confidence: 99%

Test System To Establish Mass Balances for ¹⁴C-Labeled Substances in Soil−Plant−Atmosphere Systems under Field Conditions

Schroll

Kühn

2004

Environ. Sci. Technol.

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A test system has been developed that allows the formation of mass balances for 14C-labeled organic compounds in soil-plant-atmosphere systems under field conditions. The main focus was the quantification of all different 14C-labeled gaseous losses from soil and plant surfaces after the application of 14C-labeled chemicals; therefore, a two-chamber system with specially designed trapping facilities was designed. Volatile 14C-labeled compounds and 14CO2 resulting from the total degradation of the applied 14C-labeled chemical could be trapped separately, and 14C gaseous losses from plant and soil surfaces could be determined separately as well. With this test system, it was feasible for the first time to distinguish between 14C volatile and 14CO2 losses from soil surfaces and from plant surfaces in soil monolith systems under real environmental conditions. The system itself was established on surfaces of soil monoliths (lysimeters) to study the above-mentioned processes along with the transport and leaching behavior of the chemicals in soil cores. With the new system, the behavior of organic chemicals was followed up for a whole vegetation period, and a mass balance for the applied chemical was established. Therefore, a better prediction of the long-term behavior of organic chemicals under real environmental climatic conditions was achieved. The first results for the fate of the model herbicide isoproturon in two different types of agricultural soils are presented and compared with results from an extensive laboratory study.

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Erratum to “Fate of seven pesticides in an aerobic aquifer studied in column experiments” [Chemosphere 41 (2000) 1485–1494]

Cited by 2 publications

References 1 publication

Shifts in Biodegradation Kinetics of the Herbicides MCPP and 2,4-D at Low Concentrations in Aerobic Aquifer Materials

Shifts in Biodegradation Kinetics of the Herbicides MCPP and 2,4-D at Low Concentrations in Aerobic Aquifer Materials

Test System To Establish Mass Balances for ¹⁴C-Labeled Substances in Soil−Plant−Atmosphere Systems under Field Conditions

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Erratum to “Fate of seven pesticides in an aerobic aquifer studied in column experiments” [Chemosphere 41 (2000) 1485–1494]

Cited by 2 publications

References 1 publication

Shifts in Biodegradation Kinetics of the Herbicides MCPP and 2,4-D at Low Concentrations in Aerobic Aquifer Materials

Shifts in Biodegradation Kinetics of the Herbicides MCPP and 2,4-D at Low Concentrations in Aerobic Aquifer Materials

Test System To Establish Mass Balances for 14C-Labeled Substances in Soil−Plant−Atmosphere Systems under Field Conditions

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Product

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Test System To Establish Mass Balances for ¹⁴C-Labeled Substances in Soil−Plant−Atmosphere Systems under Field Conditions