混合材对碱—碳酸盐反应的影响

利用快速测长法研究了混合材对碱—碳酸盐反应的影响。通过试验证明混合材能减缓碱—碳酸盐反应的速度,但不能有效地抑制碱—碳酸盐反应,并初步探讨了混合材不能有效地抑制碱—碳酸盐反应的机理。     

高岭土尾砂综合利用工艺研究

高岭土是制瓷工业的主要原料，在开采用加工过程中生产大量尾砂，污染环境且导致资源浪费，通过本试验研究，从尾砂中分选出工业上可综合利用的长石，云母等系列产品，并实现了无尾矿选矿新工艺。     

浅谈水泥原料山坡露天矿开拓方案的设计

开拓设计方案是矿床开采设计中影响全局性的大问题,直接影响初期建设投资、生产运营成本和资源的合理利用。文章在介绍矿山开拓方案的设计原则、考虑因素和常用方法的基础上,重点对大型水泥生产企业配套的石灰石矿和砂岩矿开拓方案的论证进行了分析介绍。     

活性矿物质净化水系统设计与应用

在目前广泛采用的纯水制备工艺的基础上,为提高水质口感及保证水中含有人体所需的微量元素,提出钠滤与BSC活性矿化器相结合制取活性矿物质净化水的工艺,并对该工艺的设计与应用进行了探讨。     

Catalytic Degradation of Nitrobenzene and Aniline in Presence of Ozone by Magnesia from Natural Mineral

In this work, magnesia from natural brucite mineral has been used firstly for catalytic degradation of nitrobenzene and aniline in presence of ozone. Compared with single ozonation, the catalytic ozonation accelerated markedly the degradation of nitrobenzene and aniline. The influences of hydroxyl radical scavengers, pH values, and reaction temperatures on degradation were investigated. It was found that the essential of catalysis was the homogeneous catalysis of hydroxyl ions in water, which accelerated the generation of hydroxyl radicals. As a catalyst, magnesia from natural brucite has supplied an economical and feasible choice for catalytic ozonation of nitrobenzene and aniline in industrial wastewater.     

矿物材料化学加工与合成的研究现状和发展方向

从以矿物原料直接制备矿物材料、矿物材料的化学改性、特殊功能粉体的合成及粉体材料合成中新技术手段的应用等方面,论述了矿物粉体材料的研究进展。聚合物/黏土纳米复合材料,由于其特殊的功能,成为矿物材料改性的新方向;特殊功能粉体赋予材料许多优越的性能,其开发和研究已成为热点,特别是在电池材料、抛光材料、生物材料的研究方面;学科交叉为材料研制带来了又一次兴起,超声波、机械化学、微波和微波等离子体,由于其特殊的功效,解决了粉体制备过程中许多难题。新方法和技术所制得材料具有优越性能和特殊功能。     

Aboveground nitrogen in relation to estimated total plant uptake in maize and bean

The main objective of this field study was to estimate the total plant uptake of soil mineral N in maize (Zea mays L.) and common bean (Phaseolus vulgaris L.) grown in crop rotations under different N content in Nicaragua. Secondary objectives were to estimate the fraction of the measured soil mineral N content taken up in this way, and to determine how the measured N in plant aboveground parts was related to the total mineral N uptake. A large variation in N content was obtained by using data from fertilisation experiments. Plant total N uptake was estimated as the residual N in a mass balance calculation of soil mineral N. Mineral N content in the top 0–0.3 m soil layer in the field cultivations and in tubes isolated from root uptake, and N content in aboveground plant parts were measured every 30 days. Estimated plant total uptake of soil mineral N varied considerably (2.5–14 g N m⁻² 30 day⁻¹) over periods and N treatments. The range of variation was similar for maize and bean. The fraction of the soil mineral N that was taken up by the plant daily varied more in maize (about 0.03–0.12 day⁻¹) than in bean (about 0.05–0.08 day⁻¹). Our results suggest that monthly changes in N in aboveground plant parts were linearly related to plant total N uptake during the same period. Aboveground plant N constituted between about 55% and 80% of total uptake of soil mineral N in maize depending on period within season, whereas for bean it was more constant and smaller (about 40%).     

粗TiCl4除钒工艺探讨

研究了粗TiCl4除钒的工艺过程，通过试验比较了各种有机物除钒的效果，结果表明矿物油除钒性能优异。1t粗TiCl4加矿物油2～4kg，反应温度135～138℃，反应时间60min，收率大于95％，质量达到企业产品标准要求。     

Sorption of Cr(III)‐containing cations on strongly basic anion exchangers

It is shown that strongly basic anion exchangers AV‐17 and Varion‐AD in definite conditions are able to retain Cr(III)‐containing ions from Cr(III) sulfate solution. It is found that the sorption of Cr(III)‐containing ions on the polymers is essentially dependent on the pH, temperature, and Cr(III) sulfate concentration. The maximum temperature dependence of sorption was found to be about 60°C. The sorption isotherms are well described by Langmuir's equations. The sorption kinetics is determined by the diffusion of Cr(III)‐containing ions into polymer's phase. It is assumed that the Cr(III)‐containing ions are retained through formation, in polymer's phase, of the jarosite‐type mineral compounds: R₄N[Cr₃(OH)₆(SO₄)₂], H₃O[Cr₃(OH)₆(SO₄)₂], and K[Cr₃(OH)₆(SO₄)₂]. For comparison of sorptional capacities, the sorption of Cr(III)‐containing ions was determined on different cation and anion exchangers. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 3978–3985, 2006