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121.
本文通过采用催化法和直燃法两种工艺处理印铁涂装生产的有机废气的工业实践,对设计和运行中的一些要点进行分析和探讨。 相似文献
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大气中SO2的液相氧化研究 总被引:2,自引:0,他引:2
大气中SO2液相氧化是形成酸雨的重要途径,降雨中含有各种无机离子和有机物质,它们可能催化或抑制液相氧化反应的进行。本文根据四川酸雨样品组成,进行了SO2在模拟雨水及实际雨水中的氧化实验,考查了V,Fe,Mn等离子对SO2氧化的催化作用,H2O2对SO2的氧化以及降水中有机物质甲醛对各反应的影响。实验结果为了解酸雨的成固,研究酸雨控制对策提供了科学依据。 相似文献
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Yoshimitsu?UemuraEmail author Kouichi?Baba Hiroyuki?Ohe Yoshihiro?Ohzuno Yasuo?Hatate 《Journal of Material Cycles and Waste Management》2003,5(2):94-97
A two-stage process for the chemical recycling of plastics is proposed. In this process, which consists of two reactors, plastics are converted into hydrogen and carbon. In the first reactor, plastic chips are thermally decomposed into hydrocarbons. In the second reactor, the hydrocarbons formed in the first reactor are catalytically decomposed into carbon and hydrogen. In this study, in order to obtain basic data for the second reactor, propene was catalytically decomposed in a laboratory-scale spouted-bed reactor (600mm high, 21.6mm internal diameter, made of SUS304). The effect of the type of spouting medium used on the decomposition behavior of propene was investigated using four types of spouting medium (nickel-plated -alumina, palladium-plated -alumina, nickel-impregnated -alumina, and -alumina). The nickel-impregnated -alumina gave the best propene conversion and hydrogen yield. 相似文献
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介绍了利用溶胶凝胶方法制备铜系催化剂,并考察了制备过程中各个工艺参数对铜系催化剂稳定性的影响。通过优化催化剂的设计和制备方法,可有效地改善Cu^2+的溶出问题,使该类催化剂具有广阔的应用前景。 相似文献
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催化湿式氧化法处理吡虫啉农药废水 总被引:2,自引:0,他引:2
自制了Cu/Mn,Cu/Ce,Cu/Ni,Ce/Mn,Ce/Ag等催化剂,经过性能比较,选择催化活性较高且金属溶出量较小的Cu/Ni作催化剂。用催化湿式氧化法处理吡虫啉农药废水,考察了各种因素对处理效果的影响。实验结果表明:在进水pH为6.93、Cu/Ni加入量为4.0g、反应温度为190oC、氧分压为1.6MPa、反应时间为120min的条件下,COD去除率为95%;处理后废水的BOD5/COD从0.093增至0.590,可生化性明显改善。 相似文献
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Anita R. Freudenthal 《Chemistry and Ecology》1998,15(1):199-209
The Rapid Sewage/Sludge Indicator Technique (RSIT), developed during the early 1970's, responded to critical needs within the Bureau of Water Pollution Control. It enabled quick detection of contamination in ocean water and bottom sediments during sewage-related emergencies and routine monitoring. RSIT became an invaluable tool for resource management, in determining where and to what extent marine environments are impacted, and when immediate information is necessary for public health decisions.
The RSIT utilizes microscopic examination for terrestrial plant vascular tissue, especially the xylem tracheid elements, as identifiers of sewage/sludge. Not normally found in ocean waters, this material, in toilet paper and the roughage of the human diet which passes through the digestive system intact, is an indicator of human faecal contamination. Minimal training and common laboratory materials allow gross screening in five minutes. New studies by the United States Environmental Protection Agency (USEPA), United States Geologic Survey (USGS) and National Oceanic and Atmospheric Administration (NOAA), most recently at the 106-mile dump site off the New York Bight, revalidated the technique as a rapid, inexpensive, easy to use, semiquantitative indicator both for water column and sediment samples. 相似文献
The RSIT utilizes microscopic examination for terrestrial plant vascular tissue, especially the xylem tracheid elements, as identifiers of sewage/sludge. Not normally found in ocean waters, this material, in toilet paper and the roughage of the human diet which passes through the digestive system intact, is an indicator of human faecal contamination. Minimal training and common laboratory materials allow gross screening in five minutes. New studies by the United States Environmental Protection Agency (USEPA), United States Geologic Survey (USGS) and National Oceanic and Atmospheric Administration (NOAA), most recently at the 106-mile dump site off the New York Bight, revalidated the technique as a rapid, inexpensive, easy to use, semiquantitative indicator both for water column and sediment samples. 相似文献