Przeglądaj wg Autor "Swarcewicz, Maria"

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    PozycjaOpen Access
    Ocena modelu reakcji i rzędu do opisu degradacji linuronu w glebie
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2013) Gregorczyk, Andrzej; Swarcewicz, Maria; Sędłak, Paweł; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Syntezy Organicznej i Technologii Leków, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Katedra Inżynierii Systemów Agrotechnicznych, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    The aim of this study was to apply the single first-order kinetic model (SFO) to the investigation of linuron degradation (pure and in the mixture with other pesticides – thiametoxam and mancozeb) in light and medium soil. Coefficients of the exponential model were determined – after logarithmic transformation – from the least squares linear regression. The single first-order reaction kinetic model turned out to be applicable to the degradation of linuron in soil (determination coefficient R2 ≥ 92.7%). In light soil, the rate of degradation was higher comparing to medium soil. The T50 values (half-life time) amounted to 36.1–49.2 days for the herbicide alone and ranged from 71.5 to 73.5 days for linuron in the mixture. Regardless of the type of soil, linuron in the mixture degraded much slower than the pure herbicide.
  • Miniatura
    PozycjaOpen Access
    Porównanie wybranych kinetycznych modeli zanikania herbicydów w glebie
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2012) Gregorczyk, Andrzej; Swarcewicz, Maria; Katedra Agronomii, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie; Zakład Syntezy Organicznej i Technologii Leków, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    The aim of the paper was to used of three types of mathematical function: the single first-order degradation kinetics (SFO), Gustafson and Holden model (FOMC) and the simple linear bi-phase model, for quantification of the fate of pesticides in soil. For instance data from laboratory study of dissipation of atrazine in soil was used. Numerical methods using for estimate of structural coefficients of degradation models of this herbicide. For every models assessed the values of 50, 90 and 100% dissipation time of substance active. Mathematical equations and figures of first derivative of functions were presented as the analysis of atrazine degradation process. Accomplishment of estimate adequately of using models. To the last degree of the kinetics criterions of degradation of substance active and the statistics criterions make good the Gustafson and Holden model. In this work find that analysis of degradation rate is valuable of study integration of kinetics degradation herbicides in soil.