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菝葜根茎中黄酮类化合物的提取与含量测定 总被引:1,自引:0,他引:1
对菝葜植物根茎中黄酮类成分进行了定量测定和定性分析.结果表明,在菝葜植物根茎中含有黄酮、黄酮醇、二氢黄酮、二氢黄酮醇等多种黄酮类化合物.以芦丁为标准品,用分光光度法测得菝葜根茎中总黄酮含量为3.36%. 相似文献
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本文对银杏叶黄酮、青蒿素、鬼臼毒素、芦丁、绞股蓝皂甙的来源、分布、含量、应用,市场及提取分离等方面作了简要概述,指出了开发利用途径. 相似文献
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具有开发前景的药用植物活性成分—银杏黄酮,青蒿素,鬼臼毒素,芦… 总被引:2,自引:0,他引:2
本文对银杏叶黄酮、青蒿素、鬼臼毒素、芦丁、绞股蓝皂甙的来源、分布、含量、应用,市场及提取分离等方面作了简要概述,指出了开发利用途径。 相似文献
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生化技术处理高含盐废水试验研究 总被引:1,自引:1,他引:0
针对注蒸汽锅炉系统产生大量的高含盐废水中石油类、COD、挥发酚等污染物超标严重现象,在对外排高含盐水进行水质分析的基础上,开展了"混凝沉淀+高盐生化"现场试验。试验结果表明:该处理技术具有较好的处理性能,其中"混凝沉淀"工艺对废水中COD、石油类及挥发酚平均去除率分别为37.5%,47%和53%;"高盐生化"工艺对"混凝沉淀"出水中COD、石油类及挥发酚平均去除率分别为31.9%,58%和65%。处理后水质稳定且可达到GB 8978—1996《污水综合排放标准》二级标准。 相似文献
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研究开发了用于分离高脂肪样品中21种多氯联苯(PCBs)和22种有机氯农药(OCPs)的分离柱填料,以及利用该填料分离含脂肪的动物组织样品中PCBs或OCPs的方法。该填料按质量百分比由硅胶-弗罗里硅土混合物30%-35%、酸性改性硅胶50%-60%和无水硫酸钠10%-15%组成,并使用自主研发的四通道色谱分离仪对样品进行分离和净化。利用本方法的填料分离PCBs或OCPs,分离方法高效、快速、工艺简单,可在成本较低的条件下达到显著的分离效果。PCBs化合物柱回收率可达96.4%-119%,对鱼脂肪组织加标回收率可达74.4%-100%;OCPs化合物柱回收率可达78.4%-103%,对鱼脂肪组织加标回收率可达78.3%-102%。结果表明该填料可用于分离PCBs或OCPs,色谱分离效果良好,可以满足高脂肪样品中OCPs和PCBs的监测分离需要。 相似文献
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本文对SBR工艺及其变形工艺ICEAS工艺、CASS工艺、UNITANK工艺、MSBR工艺在我国的研究应用情况进行了介绍,认为具有除磷脱氮功能的新型SBR工艺在我国具有良好的应用前景。 相似文献
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阳离子染料废水处理的工艺研究 总被引:6,自引:0,他引:6
首先采用两级物化-电解-吸附工艺对高浓度阳离子染料生产废水进行预处理,再与低浓度生产废水、生活污水混合生化处理,总脱色率和CODcr去除率均可达到99.9%以上,达标排放。 相似文献
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杜艳华 《中国环境管理干部学院学报》2013,(5):69-71
冷轧废乳化液是轧钢过程中排放的高浓度难降解废水,治理的关键是破乳技术。主要介绍了混凝工艺、膜分离工艺、电凝聚气浮工艺、Fenton氧化工艺、微电解工艺、微波破乳工艺原理及研究现状,并对每种工艺在乳化液废水破乳中的优缺点进行了阐述。其中混凝破乳和膜分离破乳是目前应用最广泛的技术,其他技术由于运行管理以及成本的原因应用相对较少,今后破乳技术的发展应该是高效、低成本的新技术开发或者对原有破乳技术进行革新。 相似文献
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针对漳州市东区污水处理厂AB法工艺改造的目标,分析了AB法工艺的局限性,结合该污水处理厂AB法工程的现有设施,从技术上探讨了5种具有脱氮除磷功能的工艺改造方案的可行性,并得到了适合于该污水处理厂AB法工艺改造的方案。 相似文献
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Silicon carbide (SiC) heating elements (siliconits) are widely used at high-temperature fields. The raw materials, manufacture process and application fields of siliconits are all related to heavy energy consumption and pollutions, and bring high environmental loads. The resources consumption and pollution emissions in siliconit manufacture process were quantificationally estimated by input/output method. Difference between two traditional techniques to produce siliconits in China was also compared and analyzed. The results show that siliconit manufacture processes consume large quantities of resources because the furnace is open to environment and too much thermal-protection materials are used. For the thick-end technique is more complicated and the thick-end siliconits have a bigger size and mass, there are more resources and energy consumptions and pollution emissions for thick-end process than that for equal-diameter process. Some suggestions were introduced to improve the traditional techniques and a new process was designed. It is the most important that the open furnace should be replaced by close vacuum furnace. Sintering and siliconizing process can be combined into one high-temperature process. As results of process simplification and vacuum sintering, resources and energy consumption and wastes emission can be decreased remarkably. 相似文献
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Marko Kekkonen Mari Tuomaala Lauri Holappa Markku Hurme Pekka Ahtila 《International Journal of Green Energy》2013,10(2):149-158
A conventional steel manufacturing process generates considerable amounts of reject streams and secondary raw material. These streams are either recycled back to the process or treated as waste. Recycling affects negatively on the production yield and on the controllability of unit operations. Waste represents considerable cost unless utilized in another production process as raw material. In these streams, there exists a potential to use the chemical elements more effectively. Therefore, it might be interesting to find an economical technical solution to collect the streams and increase steel production. Investments on process equipment are typically evaluated using conventional economic figures, like payback time, Net Present Value (NPV) etc. The problem with these practices is, that they consider only numerical aspects. Non-numerical and non-economical criteria are hard to cater to the evaluation. Still, they may affect on the investment profitability in the long run. Such criteria include environmental friendliness or the aspects of process integration. The article presents a comparison of a conventional steel manufacturing process with one reject stream processing alternative. A target in the process modification is to optimize the use of material and energy within the site. The comparison is based on a balanced set of criteria that affect on the efficiency of an investment. The use of these criteria is a part of the new methodology that has been developed to evaluate investments on integrated process sites. In addition to the criteria, the complete methodology includes: 1) connection of company’s strategic issues into technical design and decision making, 2) optimization of the process and calculation of process potentials (differences in the performance values between the existing process and the modified process) through the use of process integration methodologies and 3) use of decision-making aids. The research is a part of Finnish National Technology Program, “Process-Integration 2000–2004”. 相似文献
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简介了湿式电除尘器的结构特点和工作原理,通过对燃煤电厂脱硫后湿式电除尘器的应用,提出了对湿式电除尘器在选型、应用上的建议,对湿式电除尘技术的发展前景进行了探讨。 相似文献