共查询到17条相似文献,搜索用时 171 毫秒
1.
对粉煤灰处理造纸工业废水进行了研究,结果表明,脱色效果显著,可以去除一定的COD,具有一定的经济效益和环境效益。 相似文献
2.
3.
4.
采用聚二甲基二烯丙基氯化铵(PDMDAAC)对粉煤灰进行了改性。通过正交试验考察了改性的最佳工艺参数,并对比了原粉煤灰和改性粉煤灰对模拟试验废水中分散蓝的吸附效果。结果表明:改性的最佳工艺参数为:PDMDAAC的浓度为50g/L,温度为70℃,反应时间为1h,pH值为6。在最佳吸附条件下,改性粉煤灰对废水中分散蓝的去除率比原粉煤灰高18%。此改性粉煤灰可用于印染废水的处理。 相似文献
5.
6.
7.
根据国内外有关粉煤灰处理造纸废水的资料,分析讨论了粉煤灰结合其他废水处理方式处理造纸废水的情况,以及改性粉煤灰作为絮凝剂处理废水的效果。 相似文献
8.
介绍了阳离子聚丙烯酰胺改性粉煤灰,并用制备的改性粉煤灰处理造纸废水。研究了改性粉煤灰的投加量、作用时间、溶液的pH、作用温度对废水SS、COD和色度去除率的影响。结果表明:在试验条件下,造纸废水的色度去除率可达94.9%,SS和COD去除率可分别达到95.6%和95.3%。 相似文献
9.
10.
11.
文章利用粉煤灰处理染色废水,首先,用水热合成法制备沸石化粉煤灰,找出制备沸石化粉煤灰的最佳条件:NaOH浓度1 mol/L,100℃水热晶化4 h,在马弗炉中700℃焙烧1 h。然后用沸石化粉煤灰处理亚甲基兰模拟废水,找出最佳处理条件:沸石化粉煤灰投加量10 g/L,搅拌时间25 min,废水pH值2,废水初始浓度0.06 g/L,亚甲基兰废水处理后的脱色率和COD去除率最佳。此研究成果可用于染色废水处理,前景广阔。 相似文献
12.
几种廉价脱色材料在印染废水中的应用 总被引:1,自引:0,他引:1
在水处理中,吸附法是一种重要的物理化学方法。研制价格低廉、选择性好、易再生的水处理吸附剂是环保产业发展的急切需要。文章综述了粉煤灰、膨润土、离子交换树脂等几种价廉易得的吸附材料在印染废水脱色处理中的应用,并指出今后的发展方向。 相似文献
13.
14.
15.
粉煤灰在印染废水处理中的应用 总被引:2,自引:0,他引:2
介绍了粉煤灰在印染、染料废水处理方面的研究现状及应用情况,分析讨论了粉煤灰处理废水的机理,指出了应用中存在的问题并对今后的研究方向进行了展望。 相似文献
16.
Wang S 《Environmental science & technology》2008,42(19):7055-7063
Solid wastes, fly ash, and bottom ash are generated from coal and biomass combustion. Fly ash is mainly composed of various metal oxides and possesses higher thermal stability. Utilization of fly ash for other industrial applications provides a cost-effective and environmentally friendly way of recycling this solid waste, significantly reducing its environmental effects. On the one hand, due to the higher stability of its major component, aluminosilicates, fly ash could be employed as catalyst support by impregnation of other active components for various reactions. On the other hand, other chemical compounds in fly ash such as Fe2O3 could also provide an active component making fly ash a catalyst for some reactions. In this paper, physicochemical properties of fly ash and its applications for heterogeneous catalysis as a catalyst support or catalyst in a variety of catalytic reactions were reviewed. Fly-ash-supported catalysts have shown good catalytic activities for H2 production, deSO(x), deNO(x), hydrocarbon oxidation,and hydrocracking, which are comparable to commercially used catalysts. As a catalyst itself, fly ash can also be effective for gas-phase oxidation of volatile organic compounds, aqueous-phase oxidation of organics, solid plastic pyrolysis, and solvent-free organic synthesis. 相似文献