I. Purnama, F. M. Malhat, A. Mutamima, B. Rusdiarso, S. Noegrohati
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Enhanced dissipation of azoxystrobin in loam soil under direct sunlight exposure
While the impact of solar radiation on azoxystrobin degradation is known, the influence of temperature fluctuations on this process remains poorly understood. This study investigates the factors influencing azoxystrobin dissipation in soil, with a particular focus on the impact of solar radiation and temperature variations on photodegradation kinetics. Our objective was to assess, for the first time, the influence of temperature fluctuations on azoxystrobin photodegradation kinetics in loam soil. High-performance liquid chromatography was utilized to analyze dissipation rates under sunlight and dark conditions, with a quantitation limit of 0.05 mg/kg. Sampling intervals of 0, 1, 7, 15, 21, and 28 days were employed during incubation. Azoxystrobin dissipation rates were determined using first-order kinetic modeling. Results indicate a significantly accelerated dissipation rate under sunlight conditions (0.2018/day, t ½ = 3.4 days) compared to darkness (0.0912/day, t ½ = 7.6 days), highlighting the substantial impact of photodegradation and temperature fluctuations. These findings provide novel insights into azoxystrobin behavior in agricultural soils, enabling more accurate risk assessments and the development of targeted mitigation strategies to protect ecosystems from pesticide contamination.
期刊介绍：
International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management.
A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made.
The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.
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