国内无汞锌粉的发展前景分析

概述了国内无汞碱性锌锰电池的发展现状,分析了其发展趋势,提出了发展无汞锌粉的努力方向。     

研制高能碱性锌锰电池用无汞锌粉

在总结碱性锌锰电池市场现状并展望其应用前景的基础上,指出由于环境保护的严格要求,高能碱性锌锰电池无汞化已是势之必然,研制高能碱性锌锰电池用无汞锌粉意义重大。文中还就汞对负极活性物质锌粉的作用机理和无汞化锌粉物化性能的要求以及其制备工艺进行了概述。     

无汞碱锰电池用锌粉综述

无汞锌粉是无汞碱锰电池的关键材料之一。文章分析了汞在电池中的功能作用;提出了实现碱锰电池无汞化的重要性;综述了无汞锌粉的制备方法;介绍了锌粉中合金元素含量、杂质和氧化锌含量、以及锌粉颗粒大小和形状对碱锰电池性能的影响。     

影响无汞电池锌粉质量因素的研究

着重介绍了影响无汞电池锌粉质量几个主要因素：1．原材料。2．添加剂。3．工艺技术条件及生产设备。并对这些因素逐一作了较为详细的论述。通过合理控制这些因素，生产的无汞电池锌粉其质量有了很大的提高，缩小了同国外锌粉的差距。     

碱锰电池用无汞锌粉的研究

就汞对锌粉的作用机理进行了概述,通过对无汞锌粉制备工艺、锌合金的组成、锌纯度、锌粉的形貌与粒度进行研究,寻求实现碱锰电池无汞化的途径。     

锌/空气电池无汞锌粉制备技术现状

文章叙述了锌空气电池用无汞锌粉制备技术的现状，详细介绍了无汞锌粉制造的喷射雾化和电解沉积工艺。     

ITO废靶材回收制备代汞缓蚀剂用氢氧化铟的研制

介绍了用ITO废靶材通过湿法技术再生回收制备代汞缓蚀剂用氢氧化铟的工艺和氢氧化铟粉体的物理化学性能。制备的氢氧化铟粉末纯度高、粒度分布均匀,符合无汞碱性电池代汞缓蚀剂要求,过程达到了有色冶金节能、环保和循环经济的目的。     

铟代汞碱性电池前景良好

近年来,铟代汞碱性电池的研发与产业化获得前所未有的重视,未来铟代汞碱性电池在我国将具有很大的发展空间,这必将导致对作为代汞的主要金属铟的需求量的极大增长。     

电感耦合等离子体--发射光谱法(ICP-AES)测定无汞锌粉中微量元素

本文研究了ICP-AES法测定无汞锌粉中的Al、Pb、CA、Cu、Fe、Sn、Bi、In、Ca、Hg等元素含量，考查了基体对被测元素的影响，选择了仪器最佳分析条件。试验结果表明：该法简便快速，各元素的回收率精密度及确度令人满意，完全满足无汞锌粉分析要求。     

简讯

无汞电池用锌粉项目投产1月8日,在上海九凌冶炼有限公司与比利时U.M公司合资创办的上海百洛达金属有限公司锌粉工厂正式投产。无汞电池用锌粉项目的投产,填补了国内在这一领域的空白,也是中比合作的又一成果。     

Transformation of elemental mercury by bacteria

The fate and impact of elemental mercury in closed bacterial cultures were examined. The quantity of elemental mercury oxidized by bacteria ranged from small amounts for Pseudomonas aeruginosa, P. fluorescens, Escherichia coli, and Citrobacter to essentially all of the added elemental mercury for Bacillus subtilis and B. megaterium. The percentage of the total mercury in the system associated with bacterial cells ranged from 18.6 to 43.2%. Growth of the two Pseudomonas species was inhibited by elemental mercury, whereas growth of the other cultures was not distinguishable from that in mercury-free controls. No methylmercury was formed by the six cultures within 48 h.     

废干电池处理过程中汞的行为研究

本文是关于废干电池处理过程中汞的行为研究。文章从热力学角度分析研究了汞在电池浸出过程中可能发生的化学反应及其反应机理，并通过动力学实验考察了有关因素对汞的行为影响。确定出废干电池处理工艺的最佳工艺参数。     

Development of Gold and Silver Extraction Technology from Ores and Intermediate Products Containing Mercury

For a long time the ores of placer deposits were processed using amalgamation method, and this resulted in contamination of mine sites and products of treatment with mercury. Adverse effects of mercury manifested themselves at different stages of the precious metals extraction process using cyanide technology.

With the aim of improving the process the physico-chemical behaviour of mercury during cyanidation, sorption and desorption using activated carbons and ion exchange resins, electrowinning and cementation was studied. The studies came up with a set of conditions of the cyanidation process which prevented mercury from passing into a solution or brought its solubilization up to 80%.

Studies on the selective removal of mercury from cyanide solutions using different chemical methods were carried out. A settling reagent for cyanide solutions causing almost complete precipitation of mercury was found.

Tests on gold and silver extraction from mercury-free cyanide solutions by sorption, electrowinning and cementation onto carbon were conducted. No problems were encountered during these tests. A process flowsheet including two stages of cyanidation in a cone-type device, removal of mercury from solutions, precipitation of gold and silver by electrowinning was devised. The flowsheet provides complete recycling of barren solutions and purification of cyanidation cakes. The suggested flowsheet was tested in plant conditions and is recommended for use.     

国产无汞锌粉的现状及展望

介绍了国产无汞锌粉的基本情况，并以市场进行分析和预测。指出生产能力相对过剩，市场供大于求，价格呈下跌趋势；国产无汞锌粉整体质量水平与国外产品仍有差距，市场占有率偏小，进一步提高产品质量，降低成本，国产无汞锌粉将有美好的前景。     

无汞锌粉中铝的测定

本章介绍了无汞锌粉中铝测定的具体方法,根据对回收率、精密度和标准线性的试验结果分析,该方法适合无汞锌粉中铝的分析要求,具有可操作性。     

Total mercury intake from fish and shellfish by Japanese people

Elevated mercury concentrations have been reported in fish in recent years. Japanese people eat a great deal of raw fishes and shellfishes as "Sashimi" and "Sushi". The action level of large predatory fish such as tuna with total mercury levels exceeding the Japanese maximum permitted limit of 0.4 ppm is exempted from regulation in Japan. Therefore, current total mercury intake from fish and shellfish of Japanese people is unknown. The purpose of this investigation was to estimate the total mercury intake from fish and shellfish. It was found that the mean total mercury concentration of 1.11 ppm in tuna of eatable base as Sashimi or Sushi was clearly higher than the normal level. The mean total mercury intake from fish and shellfish was 0.17 mg per capita per week. According to the hypothesis that 75% of total mercury in fish and shellfish is methylmercury, the weekly intake of 0.13 mg as methylmercury was corresponding amount to about 74% of provisional tolerable weekly intake 0.17 mg of methylmercury set by the Welfare Ministry of Japan.     

Assessment of early psychic dysfunctions due to metallic mercury

The aim of the study was to find the most sensitive psychological test battery, useful for evaluation of the earliest dysfunctions in workers exposed to metallic mercury (Hg). To assess the above mentioned disorders, six tests of interference and four tests of motor reactions were applied. The examinations were performed in 44 male workers exposed to Hg in the process of acetic aldehyde synthesis. The control group was matched for sex, age and educational level. The obtained results showed that in the detection od early dysfunctions of the nervous system, psychological tests of interference are more useful than test of the motor reactions. This toxicological test battery can be recommended for monitoring workers exposed to metallic mercury.     

氢化物发生原子荧光光谱法测定再生锌原料中汞

由于锌冶炼工业是一个重要的大气汞污染源,而再生锌原料是锌的一个重要来源之一,因此再生锌中汞的准确测定具有重要的意义。实验采用先加入10 mL盐酸加热分解并除去硫后,再加入5 mL硝酸的溶样方式,以盐酸(1+19)作载流,硼氢化钾溶液作为还原剂,实现了氢化物发生原子荧光光谱对再生锌原料中质量分数为0.000 1%～0.060%汞的测定。实验中,为了使汞标准溶液稳定保存较长的时间,采用0.5 g/L重铬酸钾-5%硝酸作为汞保护剂。在选定的工作条件下,汞质量浓度在2～20 ng/mL范围内呈线性关系,相关系数R²=0.999 6。方法检出限为0.20 ng/mL,测定下限为2.0 ng/mL。干扰试验表明,样品中的共存元素不干扰汞的测定。按照实验方法测定含锌废料、瓦斯灰、氧化锌、烟灰、锌浮渣多个实际样品,结果与冷原子吸收光谱法的基本一致,相对标准偏差(RSD,n=6)在1.6 %～3.5%之间。将实验方法应用于瓦斯灰和含锌废料中汞的测定,回收率为96%～101%     

Screening batteries for the adult and children's versions of the Luria Nebraska Neuropsychological Batteries.

Conducted a study to develop screening batteries, which would usefully predict whether the Luria-Nebraska Neuropsychological Battery (LNNB) or the children's battery (LNNB—C) would show abnormalities in a given patient. Using a criterion of overall test raw score, 15 items were selected from each battery in a sample of 526 patients (aged 12–75 yrs) for the adult battery and 360 patients (aged 8–22 yrs) for the child battery. These screening batteries were shown to be highly accurate in predicting the total raw scores and the number of scales above critical levels in both the original and cross validation populations. It is emphasized that the new screening tests do not predict whether a patient is "organic" but whether the LNNB or LNNB—C would be likely to show signs of possible brain dysfunction. (PsycINFO Database Record (c) 2010 APA, all rights reserved)