排序方式: 共有44条查询结果,搜索用时 171 毫秒
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根据对福州开发区阴离子射线管(CRT)产业集群进行调查、访谈和统计分析,实证研究了该产业集群的废物产生特征和管理模式.结果发现,福州CRT产业集群在不断发展壮大的同时,随着主导产品生产规模的扩大以及配套企业的进入,废物的产生总量不断增加,单位主导产品的废物产生强度持续上升,废物种类也逐渐丰富,给区域环境带来的压力不断增大;但同时,产业集群借助其规模和集聚效应,不仅为废物交换和工业共生体系的构建提供了基础平台,而且为专营性废物回收组织和处理处置设施的良好运转营造了外部环境. 相似文献
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Currently, a large number of companies consider recycling of materials as an opportunity to maximize profits and to reduce the environmental impact generated by these materials after they are disposed. However, there is also a strong constraint on the use of recycled materials mainly due to the lack of technical/scientific information, which would relate their physical properties to their recycling cycle. This information should be used in the initial phase of the product design to serve as reference for the simulation of a project to point out the physical properties obtained from recycling the Projected material (Pm). Thus, it would be possible to foresee some recycling strategy to keep the good characteristics of recycled materials by encouraging their use, regardless of the product to be designed.Therefore, the Recycling Cycle of Materials (RCM) is a tool that provides scientific/technical support in the selection of materials. It uses the information related to the physical properties of the Pm as a parameter for product design after five recycling cycles. For the case study, this tool has been applied to obtain the basic material of ABS/PC blend. Subsequently, this blend was evaluated using DSC, FTIR, traction and impact methods to obtain delimiting data for the definition of the mechanical properties resulting from the application of RCM. 相似文献
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文章按时间顺序介绍了六个评价室内空气质量的数学模型。它们分别是歌舞厅空气质量指标模型、通风条件下室内VOC普适模型、居民住宅甲醛浓度预测模型、办公室甲醛浓度预测模型、通风条件下室内空气品质模型以及多孔建材中VOC扩散系数两尺度模型。针对每一个模型,文章都按照相应的适用条件、建模过程和应用效果进行了综述。目的是总结该领域的最新进展,为当下的检测工作与将来进一步的研究提供参考资料。 相似文献
4.
The methodology of materials accounting is presented and applied to developing nutrient balance (nitrogen and phosphorus)
in a river basin. The method is based on the balance principle: inputs and outputs of each nitrogen and phosphorus related
sub-systems were balanced. The application of the methodology strategies was illustrated by means of a case study of the Krka
river, Slovenia. Different pathways of emission to surface waters were taken into account: WWTP discharges, direct discharges,
erosion/runoff and baseflow. Total annual emission into the river Krka was estimated to be 362 tonnes N/year and 73.3 tonnes
P/year. The main sources of nitrogen are diffuse sources, emitted via baseflow (52%). Other important sources are effluents
from WWTP, which account for 36% of total emissions. Other sources like erosion and direct discharges to surface water (animal
manure, industry, households) are of lower magnitude. Erosion is main source of phosphorus emission (55% of total emission),
WWTP effluents account for 37% of total emission, while other sources are less important. Besides reduction of point sources
by means of wastewater collection and implementation of nutrient removal technology, managing agricultural nitrogen and phosphorus
to protect water quality should become a major challenge in the Krka river basin. 相似文献
5.
John Butlin 《Resources Policy》1983,9(3):177-194
This article attempts to evaluate whether an appropriate consumption-based tax is likely to be successful in reducing demand for certain exhaustible resources, thereby curtailing their rate of depletion and increasing the demand for, and utilization of, secondary materials. The nature of such a tax and anticipated effects (including environmental impact) of its imposition on certain primary materials are considered, concentrating here on one metal, aluminium. The study concludes that a tax based on the exhaustible resources and energy used in the production of a good is likely to create more savings for fossil fuels than for other exhaustible resources. 相似文献
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This paper discusses a method by which individuals working in government, private business, not-for-profit and educational organizations developed a collaborative statewide program involving the exchange of materials from manufacturers, commercial business and not-for-profit organizations in Ohio. 相似文献
9.
R. Barna Z. Rethy A. Imyim Y. Perrodin P. Moszkowicz L. Tiruta-Barna 《Waste management (New York, N.Y.)》2000,20(8):342
The reuse of waste materials requires the development of assessment methods for the long-term release of pollutants (source term) from wastes (or materials containing wastes) in contact with water. These methods depend on the scenario conditions: characteristics of the materials (especially physical structure and composition), contact with water. The scenario studied here is a water storage reservoir for fire fighting. The reservoir construction is made of a mixture of hydraulic binders and air pollution control (APC) residues from a municipal solid waste incinerator (MSWI). The modelling of the source term is performed in 5 steps ranging from the physico-chemical characterisation of the material to the validation of the proposed model by means of field simulation devices. This article presents the first steps of the methodology: physico-chemical characterisation of the source term, identification of the main transfer mechanisms and laboratory scale modelling of the source term. During the physico-chemical characterisation, it has been shown that the solidified waste shows a high basic capacity and that a relative decrease in pH during leaching favours retention of the main pollutants. During the first leaching sequences, the dynamic leaching tests show that the release of pollutants such as cadmium, arsenic, zinc and lead is extremely low but that the release of alkaline species (sodium and potassium) and chloride is very high from the beginning, whereas the release of calcium remains very high even after 3600 h of leaching. Identification of the main transfer mechanisms concludes that the release of soluble pollutants is the combined result of diffusional transfer of pollutants in the solution and the physico-chemical specificity of the species. The modelling based on these features enables a good simulation of the release but reveals a deviation from the experimental results after 500 h for alkaline species and 1000 h for Ca and Cl leaching. However, this deviation only appears after release of the major part of these elements. 相似文献
10.
废旧物资回收与固体废物资源化技术 总被引:2,自引:0,他引:2
综述了国内外固体废物资源化技术的若干进展,如热分解技术、焚烧回收、残渣利用等,并提出发展我国固体废物资源化技术的对策和建议。 相似文献