共查询到20条相似文献，搜索用时 46 毫秒
1.
王强 《化工职业技术教育》2006,(2)
对不同阴离子聚合铝铁及新型聚合铝铁复合絮凝剂的合成工艺及在实际的应用效果作了介绍。通过与聚铁、聚铝高分子絮凝剂对比,表明聚合铝铁絮凝剂在絮凝体沉降、过滤、COD等方面具有良好的性能。并对今后的发展提出了建议。 相似文献
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王强 《新疆职业技术教育》2006,(1)
本文阐述了不同阴离子聚合铝铁及新型聚合铝铁复合絮凝剂的合成工艺及应用效果。通过与聚铁、聚铝高分子絮凝剂对比,表明聚铝铁絮凝剂在絮凝体沉降、过滤、COD等方面具有良好的性能,并对今后的发展提出了建议。 相似文献
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无机高分子聚硅酸铝铁絮凝剂主要组成元素是硅、铝、钦其生产原料可以是化学试剂,也可以是矿物质和工业废物等。煤矸石富含制备无机高分子絮凝剂的主要成分,是制备无机高分子絮凝剂的天然原料。根据煤矸石的组成和结构特点,可以研制复合絮凝剂聚硅酸铝铁（PAFSi）。 相似文献
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絮凝法处理造纸废水现状与发展趋势 总被引：3，自引：0，他引：3
本文论述了造纸废水的特点和各类絮凝剂在处理造纸废水中的应用及特性.着重讨论了铝聚合物和聚丙烯酰胺及其衍生物的絮凝作用.并指出了絮凝剂的研究方向. 相似文献
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无机高分子絮凝剂在国内的研究进展 总被引：10，自引：0，他引：10
通过对国内近几年无机高分子絮凝剂铝系絮凝荆、铁系絮凝剂、硅系絮凝荆及其复合絮凝剂的制备和应用进展状况的比较研究，发现复合絮凝剂的处理效果明显好些，但高效、质优、价廉和无二次污染的絮凝剂尚有待开发。 相似文献
6.
夏平 《湖州师范学院学报》2004,26(2):48-51
根据有机絮凝剂在印染废水处理中应用情况的研究 ,讨论聚·N·二甲氨基甲基丙烯酰胺絮凝剂的制备条件和处理印染废水的实际效果 ,发现聚·N·二甲氨基甲基丙烯酰胺与聚铝硅 -A型一起使用 ,能有效地处理高色度的印染污水 相似文献
7.
本文综述了近年无机絮凝剂的改性和不同絮凝剂配合使用的研究进展,特别是阐述了无机复合、无机与有机复合和无机选择性等类型絮凝剂的开发和不同絮凝剂混合使用的现状、存在的问题,提出了今后这些类型絮凝剂的开发和混合使用的研究方向． 相似文献
8.
《西安文理学院学报》2015,(1)
综述了无机复合絮凝剂在焦化废水处理中的应用情况.无机复合絮凝剂在焦化废水处理中主要集中应用在预处理和深度处理阶段,研究多从絮凝剂投加量、废水p H值、絮凝时间及搅拌速度等方面入手,侧重于单因素对焦化废水处理效果的影响,缺少对絮凝剂制备工艺的优化及各因素间的交互影响研究.文章在阐述国内外已有研究成果基础上,从絮凝剂制备工艺、因素间的交互作用方面展望焦化废水处理中无机复合絮凝剂应用研究方向和前景. 相似文献
9.
综述了铝磷酸盐分子筛在尺度上由微孔、大孔直到介孔的发展历程,在制备方法上从最初的水热合成到溶剂热合成及有机/无机复合改性的发展变化;并介绍了磷酸盐分子筛的研究现状. 相似文献
10.
饶金星 《化工职业技术教育》2007,(2)
高分子絮凝剂的研究、生产和应用在近几年迅速发展,相对于无机高分子及有机高分子絮凝剂,改性的天然高分子絮凝剂具有无毒、环保、原料丰富易得等优点在工业废水及生活污水处理中得到广泛的应用,本文介绍了近几年国内在利用淀粉改性制备新型的多功能絮凝剂的研究情况和应用现状。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
14.
罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
15.
《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
16.
Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
17.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
18.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
19.
Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献