铂族金属废料循环利用技术与发展趋势

概述了铂族金属的主要特性及在各领域的应用状况，综述了我国铂族金属废料的资源分布情况和当前的循环利用技术水平，讨论了铂族金属废料回收火法回收利用技术的发展趋势。     

Safety evaluation of heavy metals exposure from consumer products

The determination of heavy metals in consumer products is crucial for the safety appraisal and sources classification of human and environmental exposures. These products contain various undisclosed chemical constituents with no or little known health safety information. The public is generally unaware of these types of everyday exposure from chemical constituents of consumer products and their health consequences. In this study, we recorded a body of proof demonstrating potential harm of consumer goods, by determining concentrations of total cadmium (Cd), chromium (Cr), copper (Cu), zinc (Zn), iron (Fe), lead (Pb) and nikel (Ni contents in a variety of personal care products (n = 82) commonly used in Nigeria, using flame atomic absorption spectrometer after dry and wet digestion methods. The results of the analysis indicated that the range of Cd was 0.035 ± 0.023–0.467 ± 0.167 ppm, Cr 0.015 ± 0.009–0.435 ± 0.232 ppm, Cu 0.230 ± 0.08–0.603 ± 0.025 ppm, Zn 0.003 ± 0.005–0.743 ± 0.066 ppm, Fe 0.233 ± 0.219–1.401 ± 1.878 ppm, Pb 0.02 ± 0.007–0.2050.129 ppm and Ni 0.035 ± 0.015–0.093 ± 0.06 ppm. The values of Cd and Cr are a cause for alarm because the elements are not allowed in any amount in cosmetics. Despite the fact that zinc is essential in the body, the values obtained in this study deserves safety concerns due to cumulative effect, arising from incessant exposure.     

Downside/upside price spillovers between precious metals: A vine copula approach

We studied downside and upside price spillovers between four precious metals (gold, silver, platinum and palladium), characterizing the multivariate dependence structure using a vine copula model and computing downside and upside value-at-risk and conditional value-at-risk. We found that the dependence structure differed across precious metals, all of which displayed different average and tail dependence features. Gold and silver prices were highly dependent except at the upper tail, whereas silver prices were integrated with those for platinum and palladium except at the upper tail. The gold market was very little integrated with the platinum and palladium markets. We document asymmetric downside and upside price spillover effects that differed in magnitude across precious metals; silver, in particular, had a greater downside and upside price impact on gold. Our results, indicating that precious metals do not behave as a single asset class, have implications for risk management, trading and hedging strategies for portfolios that include precious metals.     

地质样品中贵金属多元素分析研究进展

近年来，贵金属的精确分析引起了人们的广泛关注，本文对国内外贵金属的试样分解、分离富集与分析技术的应用进行总结和评述，并对未来发展趋势进行了展望。     

金融危机下有色金属行业关联担保存在的问题及对策

波及全球的金融危机对有色金属行业冲击很大,我国有色金属行业的上市公司经营出现了资金周转的问题。关联担保贷款是解决资金问题的一条重要途径。本文就是研究金融危机背景下我国有色金属行业上市公司的关联担保表现出来的一些新问题,并对其原因进行分析进而提出一些对策。本文数据来源是上海证券交易所有色金属行业的2008年年报。     

房屋装修垃圾的危害与处置探究

分析讨论了房屋装修垃圾的危害及管理和处理现状,对旧住房和新住房装修垃圾的产量和组分进行了分析,表明旧住房装修垃圾不仅产量大,而且含重金属粉尘等装修污染物质的排放也更多,最后,对装修垃圾的资源化和减量化提出了建议,指出限制新旧房屋的装修频率和提倡一次装修到位是减少装修垃圾的有效方法,同时应积极推广装修垃圾的分类放置和回收利用.     

价值工程在贵金属电工材料采购中的实证研究

价值工程是一种将技术、经济与管理各学科结合在一起的先进管理方法。通过价值工程在某贵金属公司原材料采购方案的选择与分析的应用,说明价值工程在贵金属公司成本控制中的重要意义。文章在传统的价值工程应用实践的基础上,提出一种改进的价值工程应用模型。通过对应用价值工程优选的方案进行风险评估并制定应对策略,使应用模型更趋完善。研究旨在探讨价值工程在贵金属电工材料行业的应用,进一步延伸价值工程的应用领域。     

浅论影响金属零件加工产品表面质量的因素

产品的性能,尤其是它的可靠性和耐久性,在很大程度上取决于零件表面层的质量。研究机械加工表面质量的目的就是为了掌握机械加工中各种工艺因素对加工表面质量影响的规律,以便运用这些规律来控制加工过程,最终达到改善表面质量、提高产品使用性能的目的。     

永康发展循环经济,推进资源节约与高效利用之研究

废旧金属再生利用产业已经成为永康的支柱产业，资源的再生利用托起了永康的“特色五金”，近年来，永康五金业通过发展循环经济，开展企业“内部循环”，创建区域“产业间循环”，形成了循环经济产品开发浪潮。促进了资源的节约利用和高效利用。