从铜渣氯浸渣中回收元素硫的工艺研究

用（NH4）2S法对铜渣氯浸渣中元素硫的回收进行了研究,分析了溶硫温度、溶硫时间、液固比、热分解温度、热分解时间等因素对硫回收率及贵金属溶浸率的影响.结果表明：在（NH4）2S浓度为2.5 mol/L、溶硫温度30℃、时间60 min、液固比6：1、热分解温度95℃、时间90 min的条件下,溶硫率达到96%以上,热分解提硫率达到94%左右,贵金属的溶浸率平均10.84%.     

电感耦合等离子体光谱法测定硅烷偶联剂中硫含量

研究了用电感耦合等离子体发射光谱法(ICP AES)测定SD40硅烷偶联剂中的硫含量。实验结果表明,测量的精密<0 5%,用ICP AES法测定结果与按BaSO4重量法测定结果对照,结果一致。     

天津市河西区SO_2污染现状分析与控制方法

本文针对天津市河西厂大气中SO_2的污染状况进行了分析,并提出了控制该区SO_2排放的有效途径和对策。     

从炼厂酸性气中回收氢气和硫磺的实验研究

利用氧化还原反应和电解反应构成的双反应工艺 ,对炼油厂含硫化氢的酸性气进行处理 ,回收氢气和硫磺。考察了液相流量、液相中Fe3 + 的浓度及气相流量对硫化氢吸收传质速率的影响 ,并对双反应工艺的稳定运转进行了实验验证。实验结果表明 ,该工艺过程可行 ,在适宜的操作条件下 ,硫化氢的吸收率可达 99.9%以上     

沈阳东陵公园与陨石山森林公园SO_2污染及树木含硫量的比较分析

通过实测分析,东陵公园的SO2含量超标1.58倍,环境质量恶化,树木含硫量也明显增高;陨石山公园则是基本没有污染的游览地.主要乔木树种平均含硫量低于前者91.5%,可作为植物污染生理生态研究的参照区;阔叶乔木的含硫量>阔叶灌木>针叶乔木,为城市环城林营造提供了乔灌混合的实验依据.     

硫在Ti-IF钢中的作用

IF钢成分设计的基本思想是将钢中间隙固溶的C3N原子完全清除，但通过热力学分析和对析出物的TEM分析表明，由于碳硫析出的的存在，S在固定C原子方面起到了积极的作用，据此，保持钢中适度的S／C比，可充分发挥S的作用，以形成有利的固定C的产物。     

硫磺废渣在陶瓷生产中应用的可行性探讨

通过对硫磺废渣进行的系统分析研究，认为硫磺废渣是一种长期以来被人们随意遗弃了的、有待大力转化利用的陶瓷资源，将其引入陶瓷生产将具有明显的社会经济效益与环保效益。     

钢标准物质长期存放硫,磷值降低现象初探

采用单克隆抗体作为试剂，建立了直接用于快速检测粪便中福氏痢疾杆菌的一种新方法即固相致敏红细胞吸附技术。检测２１０份疑以细菌性痢疾患者粪便标本的结果证明，用常规培养法检测阳性者，ＳＰＡＳＥ法检测阳阳性，两类方法的条例率为８１．９％；常规培养法阳性率４３．３％而ＳＰＡＳＥ法则为６１．５％。ＳＰＡＳＥ法全过程仅需２．５－３小时，可检出１０＾３－１０＾４个／ｍｌ细菌，这快速免疫法不仅能检出完整的细菌，而且     

Surface Graphite Degeneration in Ductile Iron Castings for Resin Molds

The objective of this paper is to review the factors influencing the formation of degenerated graphite layers on the surfaces of ductile iron castings for chemical resins-acid molding and core-making systems and how to reduce this defect. In the resin mold technique the sulphur in the P-toluol sulphonic acid （PTSA）, usually used as the hardener, has been identified as one factor causing graphite degeneration at the metalmold interface. Less than 0.15% S in the mold （or even less than 0.07% S） can reduce the surface layer depth. Oxygen may also have an effect, especially for sulphur containing systems with turbulent flows in the mold, water-bearing no-bake binder systems, Mg-Silica reactions, or dross formation conditions. Despite the lower level of nitrogen in the iron melt after magnesium treatment （less than 90 ppm）, nitrogen bearing resins have a profound effect on the frequency and severity of surface pinholes, but a limited influence on surface graphite degeneration.     

Microbial corrosion of concrete

Summary Sulphuric-acid-producing thiobacilli cause severe corrosion of concrete walls in sewage pipelines. The bacteria excrete sulphuric acid, which degrades carbonaceous binding material. Nitrifying organisms have been found in high cell numbers on historical sandstone buildings as well as on concrete buildings. The nitric acid, which is excreted by these organisms as metabolic end-product, also causes severe corrosion. The microorganisms are able to metabolize inorganic substances like ammonia and NO originating from air pollution.The natural process was remodelled by means of simulation experiments. It became evident that mineral-acid-producing bacteria play an important role in biodeterioration of building materials.