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以粉煤灰陶粒为基质的人工湿地中植物的生长特性与去污机制研究 总被引:1,自引:0,他引:1
城市内河污染河水采用充填高钙粉煤灰陶粒并种植不同水生植物的四段复合潜流人工湿地处理,连续进水动态实验持续7个月,通过水质指标和植物生长性能考察粉煤灰陶粒基质和水生植物的协调性。结果表明,旱伞竹在人工湿地中和粉煤灰基质协调性良好,生长适应性最好,其在光照充分条件下根系泌氧能力达到0.06 mg/L,通过根茎叶吸收全氮51.69 mg/g,全磷含量15.5 mg/g,茎叶部分吸收氮磷的含量占总吸收氮磷含量的84%和70%。 相似文献
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粉煤灰基质多孔吸附材料的研制 总被引:1,自引:0,他引:1
研究了以粉煤灰为基质,以水泥为主要粘结剂制成的多孔吸附材料的工艺参数及其对材料性能的影响,对该材料掺入补加剂后在结构上产生的变化进行了探讨,并阐明了这种材料的一些性能特点和较佳制备工艺参数。 相似文献
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研究了PVA降解菌的分批发酵动力学,并首次建立了发酵过程菌体生长、基质消耗随培养时间变化的数学模型。Logistic方程及与Luedeking-Piret方程相似的基质消耗方程能够很好的分别描述聚乙烯醇降解菌的生长及基质的消耗。研究中还论证了在聚乙烯醇降解过程中,其菌体生长与基质降解是偶联的。 相似文献
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Zeolite Y was selectively synthesised by treating Tarong fly ash in a hydrothermal system. The effects of ageing and seeding on the formation of the resultant phases, crystallisation kinetics, and gel chemistry of Si and Al were investigated. Most of the Si and Al components in the Tarong fly ash could be effectively transformed into zeolite Y in the presence of seeds but not the mineral phase, like mullite. The maximum crystallinity of zeolite Y obtained was 72%. The cation-exchange capacity (CEC) of the fly ash was 0.08 mmol/g but increased to 3.2 mmol/g after a proper treatment. Crystallisation of zeolite materials from fly ash is quite different from that of normal zeolite synthesis because the sources of Si and Al are relatively less reactive and other cation ions (e.g., K+, Mg2+) are present in fly ash. Zeolite P is a competitive phase present in the resulting products that could be eliminated by employing the seeding method. NMR study demonstrated that ageing plays an important role in enhancing the hydrothermal condition during which both Si and Al in fly ash dissolved into a basic solution and reacted to form ring-like structures, and further to zeolite materials. Seeding can selectively induce the formation of zeolite Y and eliminate the processes of induction and nucleation. 相似文献
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粉煤灰混凝土配合比中的粉煤灰胶凝效率 总被引:2,自引:0,他引:2
叙述了粉煤灰胶凝效率系数K在混凝土配合比设计中的作用 ,分析了影响该系数的因素 ,讨论了胶凝效率系数与粉煤灰效应的关系及其经济效益 相似文献
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