The compositions, sources, and size distribution of the dust storm from China in spring of 2000 and its impact on the global environment

The average mass concentration of the aerosols in Beijing during the dust storm in the spring of 2000 was ~6000 mg·m^-3, ~30 times as high as that in the non-dust storm days. The enrichment factors of the pollution elements As, Sb and Se were higher than those in the non-dust storm days. This indicated that As, Sb and Se resulted from the pollution sources of those areas, through which the dust storm passed during their long-range transport, in addition to the local pollution sources in Beijing. The enrichment factors of the Pb, Zn, Cd and Cu were much less than those in the non-dust storm days, suggesting that the local pollution sources in Beijing area contributed to them mostly. The enrichment factors of elements Al, Fe, Sc, Mn, Na, Ni, Cr, V and Co were close to 1, showing that these elements originated from crust. The concentration of S in the dust storm was ~10 mg·m^-3, 4 times as high as that in non-dust storm. S in the aerosols resulted from the adsorption of gaseous SO₂ and the consequent transformation on it. The aerosols of the dust storm contained 16.1% and 76.9% of fine particles with the sizes less than 2.1 and 9.0 mm, respectively, while it had a large number of coarse particles. It was noted that a considerable portion of Fe(Ⅱ) was detected from the dust storm. Fe(Ⅱ) could easily dissolve in seawater to be nutrient for phytoplankton and would lead to the increase of the emission of dimethylsulfide (DMS) from the ocean. The feedbacks of Fe coupled with S in atmosphere might be the important mechanism that would affect the primary productivity in Pacific and/or the global climate change.     

用炼钢烟尘制备硬磁铁氧体

采用物理相变方法，将钢厂烟尘作为制备铁氧体的新原料．通过宏观、微观分析，研究了烟尘的结构和物化性质，并通过实验总结出改进制备硬磁铁氧体的关键性工艺．给出了所制硬磁铁抗体的磁性能数据。     

纤维粉尘及其检测问题初探

本文就纤维粉尘的特性，粉尘的一般检测问题进行了讨论，关于纤维粉尘及其控制与测试技术的研究，对改善纺织厂的工作条件具有重要的现实意义。     

PET中环状三聚体产生机理及对生产过程的影响

讨论了 PET 中的环状三聚体结构、化学平衡、生成机理以及环状三聚体对加工过程的影响,最后指出要解决粉尘问题,不仅要考虑油剂、设备因素,而且要考虑工艺参数的制定。     

尘埃等离子体的引力非稳定性与凝聚效应

从尘埃等离子体的基本方程出发，采用非平衡态动力学方法，研究了尘埃粒子的引力（重力）对尘埃等离子体宏观动力学的影响，具体分析了产生凝聚效应的条件及其相关性质。结果表明，尘埃等离子体中存在一种由引力非稳定性产生的凝聚效应，从而导致局域密度增大。这种效应可能与星际介质分子云及原始恒星的形成有关，也同样会影响在实验室中等离子体加工的质量。     

热管空气预热器在动力锅炉中的应用分析

分析了热管空气预热器的传热特性和抗低温腐蚀能力以及防积灰能力，提出了控制低温腐蚀和减少积灰的有效措施，为热管空气预热器在中、小型工业锅炉和动力锅炉以及各种工业窑炉上推广应用提供了可行的依据。     

胆甾—5—烯的改进合成法

本文介绍了以锌粉为原剂合成胆甾－５－烯的方法，本法具有产率高，操作简单及污染等优点，有推广价值。     

喷射鼓泡烟气脱硫(Ⅱ)——在工业锅炉上的应用

该文介绍了喷射鼓泡烟气脱硫在工业锅炉上应用的情况。喷射鼓泡烟气脱硫工艺由石灰浆液配制系统、脱硫除尘反应系统和产物处理系统等组成。喷射鼓泡反应器（ＪＢＲ）集脱硫除尘于一体，具有气体压降小、液气比高，能达到９０％以上的脱硫率和９５％以上的除尘率等特点。ＪＢＲ脱硫系统的设备投资与运行费用低，１ｔ／ｈ锅炉的设备投资约为１．２５万元，去除１ｔＳＯ２的费用约１２５元。ＪＢＲ脱硫系统操作容易而稳定，没有结垢问题，表现出推广应用的潜力。     

对一台燃油锅炉烟尘、烟气的监测

该文介绍了锅炉烟尘、烟气的形成及危害,分析监测的原理,通过连续两天的监测,确定该锅炉排放的大气污染物符合国家标准要求。     

湿式金属填料除尘器的实验

在通风及空调系统中,为有效地净化空气,克服传统纤维过滤器的不足,采用湿式金属填料除尘器进行实验研究,利用填料表面的水膜进行粉尘的捕集和去除,并实现消毒功能.实验测试了不同淋水密度和迎面风速条件下除尘器的除尘性能,以及填料比表面积和表面活性剂等因素的影响.结果显示,在迎面风速为1.5～2.8m/s,淋水密度为0.94～2.36kg/(m2·s)的变化范围内,比表面积为500m2/m3的填料除尘器对1μm、3μm和5μm颗粒除尘率分别为21%～37%、67%～90%和74%～98%,压力损失范围为30～130Pa,该除尘方式具有除尘效率高、阻力小等特点,并且具备消毒杀菌的功能,可以代替传统的纤维过滤器在通风及空调系统中使用.