AMS方法在大气气溶胶来源研究中的应用

在我国自己建立的加速器质谱计（ＡＭＳ）技术的基础上,利用＾１４Ｃ的特征的生物来源示踪性能,将ＡＭＳ技术运用于我国大气气溶胶来源的研究,我们建立了大气气溶胶采样－－石墨碳制备－ＡＭＳ测定的全部样品处理过程,对北京市中关村地区、东单地区在采暖期和非采暖期的气溶胶样品和湖南南岳、山东青岛的气溶胶及这些地区的地表土进行了ＡＭＳ测定,将多元统计方法与ＡＭＳ方法相结合,从中分析这些样品中微量元素组分和含碳 分     

上海市污水处理设施问题探析

介绍了上海市污水处理设施的现状，并剖析了其存在的问题，如管网配套建设问题，有效处理问题，污水回用及设施的运行管理等。在此基础上，提出了一些有针对性的调控对策建议，以促进上海的水资源可持续利用。     

一种新型烟气除尘脱硫脱氮一体化装置

提出了一种新型高效烟气除尘脱硫脱氮一体化装置,该装置将三种先进的技术有机结合,取得了相得益彰的效果:采用独特溢流装置的自激式除尘器进行除尘和脱硫脱氮,采用球面筛板塔进行二次除尘和脱硫脱氮,采用结构新颖的汽水分离器进行进一步除尘和脱硫脱氮。该装置不仅实现烟气的高效脱硫脱氮,而且可实现有用细微粉尘即稀有金属的回收。此类装置还可应用于矿山、化工和建材等领域中的湿法除尘。     

Chemical characteristics of cloudwater over Maoer Mountain district

Samples of cloudwater, rainwater and ambient aerosol were collected over Maoer Mountain in the northeast of Guangxi Province in March 1988. The pH value of cloudwater ranged from 3.37 to 6.20 with a mean value of 4.34. SO42- , NO3- , NH4+, Ca2+ and H+ were the principal ionic species of cloudwater. The advance of cold fronts into Maoer Mountain appeared to lead to higher major ionic concentration and acidity than that of warm fronts. The relative acidity and concentration of NO3- of cloudwater were much greater than that of aerosol samples. With the exception of. NO3- and H+, most of the concentration of SO42- and NH4+ in cloudwater came from the nucleation scavenging of aerosol. Gaseous nitric acid and organic acid from local may be one of the important source of cloudwater acidity. Compared with other sites, Maoer Mountain can be as a clean contrast station for studying acidic precipitation in Guangdong and Guangxi provinces.     

碟形封头冷旋压成形时的数值分析及旋压力计算

建立了碟形封头冷旋压的三维有限元数学模型 ,分析了封头在冷旋压成形过程中应力应变的分布规律 ,计算了旋压力并分析了其变化的原因 ,为更有效地进行旋压加工前的科学预测、工艺优化和进一步定量控制提供了可靠方法和依据     

含氟废水的净化技术研究

对含氟废水处理技术的研究进行了介绍，讨论了各自的作用机理及其在含氟废水处理中的应用。为工程设计和生产工艺提出了一些有益的建议。在此基础上对含氟废水处理的发展趋势做了分析和展望。     

Water pricing towards sustainability of water resources: a case study in Beijing

The role of water pricing for managing water resources is widely recognized in many areas of the world because of the increasing scarcity of water resources, a high competition between water uses and environmental degradation. Based on the analysis of cost of water, this paper explores which types of cost should be reflected in the water pricing enhancing the sustainability of water resources. The principle of full cost pricing in which the cost should include supply cost, opportunity cost and externalities is proposed as a means to achieve the sustainability of water resources. In a case study of Beijing, low water price is analyzed as one reason for unsustainable water consumption. Thus water pricing justified is necessary and pressing. It is proposed to justify water price in phased manner and eventually towards full cost pricing. The assessment of impacts on water resources by raising water price shows water pricing could alleviate the conflict between water supply and demand. This paper concludes that water pricing can play an effective role in enhancing the sustainability of water resources in Beijing.     

石化行业的清洁生产

清洁生产是以提高企业的科学管理水平，降低原材料、能源资源的消耗，减少污染物的产生量和排放量，减少污染物的处理费用，实现最佳的生产工艺，最佳的资源配置、最佳的管理水平、最佳的污染控制设备为目标。文中根据石化行业生产工艺情况，说明石化行为实施清洁生产的方法和途径。     

高强度高精度螺栓热后毛坯的矫直

利用搓丝原理 ,在自动搓丝机上 ,对热处理后的高强度螺栓毛坯进行矫直处理 ,提高了产品合格率和生产效率。     

城镇市政设施投资项目环境影响后评价探讨

城镇市政设施是城镇经济和社会发展的载体,加强其环境影响后评价工作,能为其决策者提供系统、全面、科学的信息反馈,对于促进城镇社会经济与自然环境的持续、协调、稳定发展,具有十分重要的现实意义.在对城镇市政设施投资项目环境影响后评价的概念进行界定的基础上,对城镇市政设施投资项目环境影响后评价的意义及工作程序进行了阐释,并结合城镇市政设施投资项目的具体特点,对其环境影响后评价的内容从大气、水体、噪声、土壤、固体废弃物和生态等六个方面进行了研究探讨.