環(huán)境專業(yè)畢業(yè)論文外文翻譯-環(huán)境工程(參考版)
2025-01-23 03:28本頁面
【正文】 generally exposure assessment is the determination of ecological pollutants distribution of space and time, the existence of morphological, bioeffectiveness and ecological ponents of concern to the contact situation. Ecological exposure assessment is the most basic ponent of the system of the process of ecological risk assessment as a result of exposure to the plex nature of exposure is not a description could apply to all of the ecological risk assessment. Exposure assessment of many factors there are uncertainties. The reasons are that there is a risk that the inplete understanding of the population, the effectiveness factor of pollutants not understand a single, especially the multidose exposure to a mixture of response do not have a profound understanding of the law, as well as laboratory results to the field of the different spatial and temporal scales difficulties and so on. It is clear that ecological exposure assessment is plex than human exposure assessment, the key points are pollutants and anisms must be considered, as well as ecosystems, pollution and environment interaction, mutual influence. Therefore, we must strengthen the evaluation of research methods and techniques. 4. Deal of uncertainty It is always the major problem that Deal with uncertainty in risk assessment. Uncertainties in extrapolating from the variety processes, such as: interspecies extrapolation, between different levels of biological anization extrapolation from laboratory to field extrapolation cases, from highdose to lowdose extrapolation and others. Therefore, it is the key technical problems to address that the uncertainty dealing with quantitative risk assessment. We need to develop extrapolation theory, and built up the appropriate extrapolation model. In short, with the Environmental Protection has entered a new era, it can be predicted that environmental risk assessment studies will write fresh history about the survival of mankind, environment protect and improve the natural environment to make new contributions to the theoretical advancing of environmental science study. 。 Ecological risk, not only taking into accounts biological individuals and groups, but also taking into account the munity, evens the entire ecosystem。 Environmental risk from the type of example, not only take into account chemical pollutants, especially toxic and hazardous chemicals, but also nonchemical factors take into account the adverse effects on the environment。 ecological risk assessment is concluding and bees satisfactory. In
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