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从我国污染减排形势及实际环境管理需求出发,分析了实施污染物排放总量预算管理制度的意义,明晰了这项制度的定义及实施的理论基础,并从国家层面首次提出了污染物排放总量预算管理制度的适用范围、总体框架、基本原则、实施技术方法及管理方法。 相似文献
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“土壤环境质量标准”编制进展 总被引:6,自引:0,他引:6
报导了国内外在编制“土壤环境质量标准”的最新进展,论述了编制时应考虑到的一些关键因素,主要包括,编制时依据的技术路线,污染物的种类和形态,土壤性质(PH、有机质、Eh、R2O3的类型和含量、阳离子代换量和质地)和作物因素,简介了我国最近新编制完成的“土壤环境质量标准”的主要内容,并建议今后补充和进一步完善的部分。 相似文献
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Benedetti M Ciaprini F Piva F Onorati F Fattorini D Notti A Ausili A Regoli F 《Environment international》2012,38(1):17-28
Evaluation of chemical bioavailability and onset of biological alterations is fundamental to assess the hazard of environmental pollutants, particularly when associated to sediments which need to be removed. In the present work, five sediment samples were collected from the Venice Lagoon and data from sediment chemistry were integrated with those of bioaccumulation of chemicals in European eel (Anguilla anguilla) exposed under laboratory conditions, responses of a wide battery of biomarkers, and standardized ecotoxicological bioassays. The overall results were elaborated within a recently developed, software-assisted weight of evidence (WOE) model which provides synthetic indices for each of considered line of evidence (LOE), before a general evaluation of sediment hazard. Levels of chemicals in sediments were not particularly elevated when compared to sediment quality guidelines of Venice Protocol. On the other hand, bioavailability was evident in some samples for Cd, Cu, Zn and, especially, polycyclic aromatic hydrocarbons. The ecotoxicological approach provided further evidence on the biological and potentially harmful effects due to released contaminants, and oxidative-mediated responses appeared of primary importance in modulating sublethal responses and the onset of cellular alterations. Biomarkers variations were sensitive, and more evident variations included significant changes of cytochrome P450 biotransformation pathway, antioxidant responses, onset of oxidative damages, lysosomal membrane stability and genotoxic effects. The results obtained from the battery of bioassays indicated that responses measured at organism level were in general accordance but less marked compared to the onset of sublethal changes measured through biomarkers. Overall this study revealed differences when comparing evaluations obtained from different LOEs, confirming the importance of considering synergistic effects between chemicals in complex mixtures. Compared to a qualitative pass-fail approach toward normative values, the proposed WOE model allowed a quantitative characterization of sediment hazard and a better discrimination of on the basis of various types of chemical and biological data. 相似文献
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沈阳市大气污染物总量控制的探讨 总被引:1,自引:0,他引:1
根据辽宁省下达给沈阳市的大气污染物总量控制目标,对沈阳市大气污染物进行总量目标分配.提出总量控制措施,实现对沈阳市大气污染的总量控制管理,为经济发展提供一定的环境容量,推动全市技术进步和经济发展 相似文献
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