Paulo Vinicius da Silva, Paulo Henrique Vieira dos Santos, Roque de Carvalho Dias, Bruna Ferrari Schedenffeldt, Pedro Jacob Christoffoleti, Edivaldo Domingues Velini, Caio Antônio Carbonari, Elias Silva de Medeiros, Patrícia Andrea Monquero
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引用次数: 0
Abstract
Herbicide leaching studies are extremely important to evaluate the environmental behavior of these products in the environment. However, there are no equivalence analyses in the literature of the most commonly used methods: bioassays and HPLC. Therefore, the present study aimed to analyze the leaching of the herbicides imazapic (147 g ai ha−1) and sulfentrazone (800 g ai ha−1) using bioassays with Cucumis sativus L. and HPLC/MS/MS methodologies when applied to sugarcane straw and directly on the soil and subjected to different periods of drought. Two experiments were performed with soil columns that followed a completely randomized design, with four replicates, in a 3 × 4 × 2 factorial scheme, with three treatments (0, 30 and 60 days after the application), four soil depths (0–0.05; 0.05–0.1; 0.1–0.15 and 0.15–0.2 cm) and in the absence of straw or with 10 t ha −1 straw for each of the herbicides: imazapic and sulfentrazone. The bioassay and HPLC methodologies were equivalent in the leaching of imazapic to a depth of 0.1 m. Sulfentrazone showed low to moderate leaching, since from 0.10 cm, leaching was inexpressive in both methods, and in the 0.15–0.2 m layers in the HPLC methodology, the amount of herbicide detected was zero. Therefore, both methodologies can be considered equivalent in the study of herbicide leaching because even though they are different quantitative (HPLC) and qualitative (bioassay) methods, they resulted in interpretations similar in relation to the behavior of herbicides in the soil.
期刊介绍:
Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments.
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Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.