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Pesticides in the jiu river course.modelling the evolution of pesticides concentration

机译:九江河道中的农药模拟农药浓度变化

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摘要

Pesticides are among the most widely used chemicals in the world, and also among the most dangerous to human health. Pesticides can also have chronic health effects both because of acute poisonings and chronic exposure. Many studies have shown adverse health effects on humans. Many of the commonly used household insecticides are organophosphates. These have been linked in many studies to neurological damage in humans. The classic measurements used for pollution evaluation include the biological consumption of oxygen in a 5-day period of time and the chemical oxygen consumption, the amount of oxygen extracted from water by bacteria when agents of pollution are decomposing. The more organic matter can be found in discharged effluents, the more the amount of oxygen is necessary for decomposition of such pollutants increases and, consequently, the higher is the pollution. In this paper, a mathematical model of the evolution of concentrations of pesticides is widely studied. This model is a dynamic bi-dimensional system with three parameters. The variables of the system are the concentration of pollutant and the level of oxygen from water. We achieve this thing by determining both the time trajectories and the evolution of the degrees of oxygenating the waters as a function of the quantity of pollutant for various values of the parameters.
机译:农药是世界上使用最广泛的化学物质之一,也是对人类健康最危险的化学物质之一。农药也可能由于急性中毒和长期暴露而具有慢性健康影响。许多研究表明对人类健康产生不利影响。许多常用的家用杀虫剂是有机磷酸盐。在许多研究中,这些都与人类神经系统损伤有关。用于污染评估的经典测量方法包括5天时间内的生物耗氧量和化学耗氧量,当污染物质分解时细菌从水中提取的氧气量。在排出的废水中发现的有机物越多,分解此类污染物所需的氧气量就越多,因此污染程度也就越高。在本文中,广泛研究了农药浓度变化的数学模型。该模型是具有三个参数的动态二维系统。该系统的变量是污染物的浓度和水中的氧气含量。我们通过确定时间轨迹和水氧化程度的演变来实现这一目标,其中水氧化程度随各种参数值的污染物数量而变化。

著录项

  • 来源
    《Journal of Environmental Protection and Ecology》 |2011年第3a期|p.1320-1333|共14页
  • 作者单位

    Facuity of Financial Management Accounting, Spiru Haret University,4 Brazda lui Novac Street, Craiova, Romania;

    Facuity of Financial Management Accounting, Spiru Haret University,4 Brazda lui Novac Street, Craiova, Romania;

    Facuity of Financial Management Accounting, Spiru Haret University,4 Brazda lui Novac Street, Craiova, Romania;

    Facuity of Financial Management Accounting, Spiru Haret University,4 Brazda lui Novac Street, Craiova, Romania;

    Chemistry Faculty, University of Craiova, 165 Calea Bucuresti Street, Craiova,Romania;

    National R & D Institute for Cryogenics andlsotopic Technologies - ICSI Rm.Valcea, 4 Uzinei Street, Rm. Valcea, Romania;

    Faculty of Economic and Business Administration, University of Craiova,13 A. I. Cuza Street, Craiova, Romania;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    pesticides; environment; dynamic bi-dimensional system; GC-MS;

    机译:农药环境;动态二维系统;气质联用仪;

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