负载贵金属的层柱分子筛比表面积研究

采用两种矿产钙质蒙脱土为原料制备了两种层柱分子筛（Ａｌ－ＣＬＭ和Ａｌ－ＣＬＢ）。首先考察了焙烧温度对其比表面积的影响，结果发现在３００～５００℃范围内，随着焙烧温度的提高，层柱分子筛的比表面积逐渐增大，６００℃以后比表面积迅速下降；对负载贵金属Ｐｔ或Ｐｄ后其比表面积变化情况的研究表明，不论是Ａｌ－ＣＬＭ还是Ａｌ－ＣＬＢ，负载金属后比表面积均下降，且负载Ｐｔ后比表面积下降均比负载Ｐｄ后比表面积下降得多；在Ｐｔ／Ａｌ－ＣＬＭ比表面积因浸渍液的不同而引起的比表面积变化的研究中，发现用酸性较强的浸渍液（Ｈ２ＰｔＣｌ６·６Ｈ２Ｏ）比用酸性较弱的浸渍液（Ｐｔ（ＮＨ３）４Ｃｌ２）所引起的比表面积下降得多，最后在Ｐｔ（Ｐｄ）／Ａｌ－ＣＬＭ和Ｐｔ（Ｐｄ）／Ａｌ－ＣＬＢ的苯加氢反应中发现苯转化率随着比表面积的增大而上升。     

湖南有色金属工业发展战略评述

概述了湖南有色金属工业发展的基本现状和所存在的主要问题，分析了其面临的战略形势。指出湖南有色金属工业必须走产业结构总体优化、产业全面升级和大集团层面资本运营发展之路，并详细提出了相应的战略措施。     

燃煤飞灰对痕量重金属吸附脱除的研究

煤燃烧过程中生成的飞灰实际上是一种吸附痕量重金属的固体吸附剂，而飞灰结构和组分、灰中含碳量以及烟气温度等因素对飞灰吸附脱除痕量重金属有不同的影响。研究表明，这种吸附脱除机理是一种复杂的物理吸附和化学反应及化学吸附的组合，飞灰本身的结构特性和化学组分对痕量元素的吸附影响很大，烟温也是关键的影响因素，而灰中含碳量对其影响很小。     

Endogenous Particle Stabilization During Magnesium Integral Foam Production

The production of magnesium integral foam components with a dense shell and a porous core is investigated. High pressure casting methods are used where liquid magnesium mixed with a blowing agent is injected into a permanent steel mould. A compact shell develops due to fast cooling at the walls. Larger cooling times in the core allow the decomposition of the blowing agent and the evolution of a foam structure. The resulting integral foams show a high weight‐specific stiffness combined with high energy absorption capability. For the first time, foam stabilizing without additives is realized. Stabilization is by foaming during solidification with the primary α‐phase particles acting as obstacles slowing down cell wall thinning.     

我国贵金属废料回收产业发展综述

分析了贵金属回收利用具有良好的经济效益，国内外对这项工作极为重视，并取得了佳绩。同时，总结了废旧贵金属的主要来源，以及回收新技术。指出，我国废旧贵金属回收体系不够健全，亟待政策扶持。     

Studies of deformation-induced texture development in sheet materials using diffraction techniques

Crystallographic texture measurements were made on a series of rolled aluminum sheet specimens deformed in equi-biaxial tension up to a strain level of 0.11. The measurement techniques used were neutron diffraction with a 4-circle goniometer, electron backscatter diffraction, conventional powder X-ray diffraction (XRD), and XRD using an area detector. Results indicated a complex texture orientation distribution function which altered in response to the applied plastic deformation. Increased deformation caused the {1 1 0} planes, to align parallel to the plane of the sheet. The different techniques produced results that were very consistent with each other. The advantages and disadvantages of the various methods are discussed, with particular consideration of the time taken for each method, the range of orientation space accessible, the density of data that can be obtained, and the statistical significance of each data set with respect to rolled sheet product.     

An Analytical Equation of State for Alkaline Earth Metals

In this work, an analytical equation of state based on statistical mechanical perturbation theory, which was initially developed for normal fluids and can be applied to predict the P–V–T data for saturated liquid alkaline earth metals, is presented. The equation of state is that of Ihm, Song, and Mason, and the temperature-dependent parameters of the equation of state are calculated from a corresponding-states correlation as functions of the reduced temperature. Two scaling constants are sufficient for this purpose, the surface tension and the liquid density at the melting point. The equation of state is used to predict the saturated liquid density of molten alkaline earth metals from the melting point up to 2000 K, for which experimental data exist, within an accuracy of 5%.     

Lead Extraction from Contaminated Soil Using Water-Soluble Polymers

The applicability of water-soluble polymers as extractants for the remediation of heavy metal-contaminated soils has been explored using a lead-contaminated Superfund soil as a sample system. Polyethylenimine (PEI) was functionalized with bromo- or chloroacetic acid to give an aminocarboxylate chelating group, which effectively binds lead. The resulting polymer, PEIC, has extraction properties similar to the molecular chelator ethylenediaminetetraacetic acid. A series of studies was done to probe optimum conditions for lead extraction from soils obtained from the Cal-West Superfund site in New Mexico that contained approximately 10,000 ppm of Pb. In batch extraction experiments using polymer functionalized at two different levels, the polymers removed greater than 97% of the lead from the soils. Subsequent experiments demonstrated that the selective extraction of lead could be controlled by varying polymer functionalization levels. Concentration and regeneration of the polymers using ultrafiltration was also demonstrated. Release of lead from the polymer was accomplished by acidification to pH 1 with HCl. Subsequent ultrafiltration allowed recovery of the extractant polymer for reuse.     

Review of ECSC research work in ironmaking

The Treaty of the European Coal and Steel Community (ECSC), which expired in 2002, states in its Article 55 to promote technical and economic research with respect to the production and growing application of coal and steel. The results of funded research projects shall be made available to all representatives and partners concerned. For the European steel industry Article 55 was the basis for building up a steel research programme covering topics from raw materials to steel application and instigated a European network of researchers from the steel industry, research institutes and universities. On the basis of these research and development activities carried out by the ECSC steel research, the iron and steel industry has shown important advances in technology and environmental compatibility. Furthermore, the ECSC steel research has contributed to nearly all important technological developments. The main objective of the ECSC steel Research and Technology Development (RTD) programme was to sustain and develop the Community steel industry's competitiveness. The following report describes fundamental developments and activities within the framework of ECSC research with particular respect to hot metal production in the last 15 years.     

珠江三角洲典型区域土壤重金属污染探查研究

以珠江三角洲典型区域研究高强度经济开发下土壤环境中重金属污染的状况。测定了84份样品中铜、锌、镉、铬、铅的含量水平。土壤中镉、铬、铅、镍、铜、锌的含量分别在0.166～0.433mgkg-1、2.28～94.28mgkg-1、20.36～143.3mgkg-1、2.29～63.55mgkg-1、4.8～65.1mgkg-1、10.06～131mgkg-1之间。从分析结果可以看出,镍、铅等元素在有些地方普遍偏高,且有的极为明显,已高出背景值108.3mgkg-1。其他元素也存在不同水平的富集,普遍高出背景值。