Adsorption and Desorption of Atrazine, Deethylatrazine, Deisopropylatrazine, and Hydroxyatrazine on Levy Wetland Soil

Mersie, Wondimagegnehu; Seybold, Cathy A.

doi:10.1021/jf950370k

Cited by 67 publications

(61 citation statements)

References 27 publications

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“…Vegetative growth in forest wetland ecosystems is often limited by N and P. Nutrients that are taken up by plants and microbes are supplied through nutrient mineralization during the litter decomposition process (Koch and Reddy 1992;Cooper and Brush 1993). In the past few decades, intensive agricultural fertilization and inadequate wastewater treatment have contributed to increasing concentrations of N (Smolen 1981;Magette et al 1989;Pickett et al 1992;Hill 1996) and herbicides (Kolpin et al 1994;Liu et al 1996;Pasquarell and Boyer 1996) in surface runoff and groundwater which in some cases have resulted in the accumulation of these chemicals in wetlands (Szeto et al 1990;Spalding et al 1994;Goolsby et al 1994;Wan et al 1994Wan et al , 1995Mersie and Seybold 1996).…”

Section: Introductionmentioning

confidence: 99%

Influence of nitrogen on atrazine and 2, 4 dichlorophenoxyacetic acid mineralization in blackwater and redwater forested wetland soils

Entry¹

1999

Biology and Fertility of Soils

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Microcosms were used to determine the influence of N additions on active bacterial and fungal biomass, atrazine and dichlorophenoxyacetic acid (2,4-D) mineralization at 5, 10 and 15 weeks in soils from blackwater and redwater wetland forest ecosystems in the northern Florida Panhandle. Active bacterial and fungal biomass was determined by staining techniques combined with direct microscopy. Atrazine and 2,4-D mineralization were measured radiometrically. Treatments were: soil type, (blackwater or redwater forested wetland soils) and N additions (soils amended with the equivalent of 0, 200 or 400 kg N ha" as NH 4NO3). Redwater soils contained higher concentrations of C, total N, P, K, Ca, Mn, Fe, B and Zn than blackwater soils. After N addition and 15 weeks of incubation, active bacterial biomass in redwater soils was lower when N was added. Active bacterial biomass in blackwater soils was lower when 400 kg N ha-1 , but not when 200 kg N ha', was added. Active fungal biomass in blackwater soils was higher when 400 kg N ha-1 , but not when 200 kg N ha', was added. Active fungal biomass in redwater soils was lower when 200 kg N ha-1 , but not when 400 kg N ha', was added. After 15 weeks of incubation 2,4-D degradation was higher in redwater wetland soils than in blackwater soils. After 10 and 15 weeks of incubation the addition of 200 or 400 kg N ha' decreased both atrazine and 2,4-D degradation in redwater soils. The addition of 400 kg N ha' decreased 2,4-D degradation but not atrazine degradation in blackwater soils after 10 and 15 weeks of incubation. High concentrations of N in surface runoff and groundwater resulting from agricultural operations may have resulted in the accumulation of N in many wetland soils. Large amounts of N accumulating in wetlands may decrease mineralization of toxic agricultural pesticides.

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Section: Introductionmentioning

confidence: 99%

Influence of nitrogen on atrazine and 2, 4 dichlorophenoxyacetic acid mineralization in blackwater and redwater forested wetland soils

Entry¹

1999

Biology and Fertility of Soils

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“…Not only is it very laborious to determine K oc , but also the measured K oc is very dependent on the properties of used soil. Here the log K oc values of the four herbicides determined by Mersie and Seybold (1996) with a kind of soil are presented in Table 2, accompanied with their aqueous solubilities (Erickson and Lee 1989). Shea (1989) suggested that K oc values were negatively correlated with aqueous solubilities for the same class of compounds.…”

Section: Resultsmentioning

confidence: 95%

Soil Leaching Column Chromatographic Technique for Estimation of Leaching Behavior of Atrazine, Deethylatrazine, Deisopropylatrazine, and Hydroxyatrazine on Soil

Fang

Liang

Lin

et al. 1999

Bulletin of Environmental Contamination and Toxicology

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Agriculture production has greatly benefited from the use of herbicides. Nevertheless, their extensive use can contaminate groundwaters by their leaching through soil porosity. Striazines are the sort of herbicides that have been frequently detected in surface and ground waters primarily because of their widespread use and moderate persistence in soil (Poinke et al. 1988). Atrazine (AT; 2-chloro-4-ethylamino-6-isopropylamino-s-triazine) is applied to control the growth of grasses mainly in corn and sorghum . Fieldmonitoring studies of surface and ground waters have shown the detection of AT and its three metabolites deethylatrazine (DEA; 2-amino-4-chloro-6-isopropylamino-s -triazine), deisopropylatrazine (DIA; 2-amino-4-chloro-6-ethylamino-s-triazine), and hydroxyatrazine (HA; 2-hydroxy-4-ethylamino-6-isopropylamino-s-triazine) (Thurman et al. 1994;Adams and Thurman 1991; Poinke et al. 1988). Besides AT, its metabolites are also phytotoxic and toxic for animals (Behki and Khan 1986), they are formed by microbial degradation through N-dealkylation (Poinke and Glotfelty 1990) or hydrolysis of AT (Mandelbaum et al. 1993).Sorption behaviors of AT and its metabolites with batch equilibrium method were extensively studied, but few studies have focused on their retention by soils. Since available data were not always obtained under the same conditions for the four compounds (Brouwer et al. 1990), a direct comparison of their leaching ability is almost impossible.As detailed screening of herbicide's mobility behavior under field conditions is timeconsuming and costs a lot, reversed-phase (RP) HPLC has been proposed (Singh et al. 1990). Hansch et al. (1979) demonstrated the relationship between logarithm of capacity factor (k') on an RP-HPLC column and logarithm of octanol/water partition coefficient (log K ow ) of a chemical. A linear correlation also exists between log K ow and log K oc (Sabljic et al. 1995), the soil organic carbon distribution coefficient. Thus a correlation between measured log K oc and log k' in RP-HPLC is present (Kördel et al. 1993).However, in most cases, these correlations are only suitable for the solutes that have similar interactions with two chromatographic phases, or for the same class of compounds. Otherwise large estimation error will occur when all solutes with different classes are treated as a single group. The objective of our study was to use a new soil

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“…Vários autores têm mostrado a maior retenção do metabólito HA em relação a atrazina e aos outros metabólitos, DEA e DIA (Clay & Koskinen, 1990;Brower et al, 1990;Mersie & Seybold, 1996;Lerch et al, 1999), o que tem sido atribuído à menor solubilidade em água da HA e a sua maior estabilidade termodinâmica (Erickson & Lee, 1989;Lerch et al, 1999). Isto também foi observado neste trabalho.…”

Section: Profundidade (Cm)unclassified

“…Os valores do parâmetro N, para sorção, foram de 0,84 e 0,85 para PD e PC, respectivamente, mostrando isotermas de sorção não lineares para a atrazina, nas concentrações empregadas. A magnitude destes valores está de acordo com a literatura (Clay & Koskinen, 1990;Mersie & Seybold, 1996;Moreau & Mouvet, 1997;Mersie et al, 1999) e sugere um grau de sorção intermediário para a atrazina, quando comparada com moléculas altamente sorvidas (por exemplo, o glifosato e os organoclorados -Prata et al, 2000b;Roberts & Hudson, 1999, respectivamente) ou de sorção reduzida (por exemplo, o picloram e o aldicarb - Roberts et al, 1998;Roberts & Hudson, 1999 Freundlich para dessorção. 6/ Grau de linearidade da isoterma de sorção.…”

Section: Sorção E Dessorçãounclassified

“…A extensão da mobilidade da atrazina está relacionada ao conteúdo de matéria orgânica do solo (Moreau & Mouvet, 1996;Mersie & Seybold, 1996), o qual, por sua vez, também está envolvido na metabolização deste herbicida. A metabolização da atrazina em hidroxiatrazina (HA), seu principal metabólito (Lerch et al, 1999), ocorre principalmente via hidrólise química e é catalisada pelos processos de sorção (devido à matéria orgânica) e por baixos valores de pH (Lerch et al, 1998 (Nielsen & Biggar, 1961).…”

Adsorption and Desorption of Atrazine, Deethylatrazine, Deisopropylatrazine, and Hydroxyatrazine on Levy Wetland Soil

Cited by 67 publications

References 27 publications

Influence of nitrogen on atrazine and 2, 4 dichlorophenoxyacetic acid mineralization in blackwater and redwater forested wetland soils

Influence of nitrogen on atrazine and 2, 4 dichlorophenoxyacetic acid mineralization in blackwater and redwater forested wetland soils

Soil Leaching Column Chromatographic Technique for Estimation of Leaching Behavior of Atrazine, Deethylatrazine, Deisopropylatrazine, and Hydroxyatrazine on Soil

Comportamento do glifosato no solo e deslocamento miscível de atrazina

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