（毕业设计论文）《碱改姓粉煤灰吸附除磷性能研究》.docVIP

精品 PAGE 攀枝花学院本科毕业设计（论文） 碱改性粉煤灰的吸附除磷性能研究 学生姓名： 学生学号： 200810903012 院（系）： 生物与化学工程学院 年级专业： 08环境工程 指导教师： 讲师 二〇一二年六月 精品 摘 要 我国火电厂粉煤灰的主要氧化物组成为：SiO2、Al2O3、Fe2O3、CaO,由于表面结构致密，将其直接用于吸附，效率低，在水处理中投放量大，且原灰灰水分离率低。将改性后的粉煤灰用于废水处理是近年来发展起来的一种新方法， 由于其价廉易得, 在废水处理中有着广泛的研究。 用氢氧化钠对粉煤灰进行碱改性，探讨了影响粉煤灰吸附除磷性能的因素。实验结果表明：用浓度为3mol/L的氢氧化钠溶液改性粉煤灰，碱改性粉煤灰在300℃温度下灼烧，投加量为0.5g，处理初始浓度为50mg/L的含磷废水50mL，中性条件下，常温25℃，搅拌时间60min，能达到吸附除磷效率92.62%。 关键词 粉煤灰，吸附，除磷，碱改性 精品 ABSTRACT Chinas thermal power plant fly ash is the main oxides consisting of: SiO2, Al2O3, Fe2O3, CaO, due to compact surface structure, can be directly used for adsorption, low efficiency, in water treatment on the amount is large, and the original gray water separation rate is low. The modified fly ash used in wastewater treatment is a recently developed new method, because of its cheap, in water treatment has a wide range of research. Using sodium hydroxide on powder ash alkali modification, discusses the influence of fly ash adsorption and removal by factors. The experimental results show that: with the concentration of 3mol/L NaOH solution modified fly ash, alkali modified fly ash in 300 degrees Celsius temperature burning, dosage is 0.5g, processing the initial concentration of50mg/L containing waste water by50mL, the neutral condition, temperature25 C, the mixing time can reach60min, adsorption phosphorus removal efficiency of 92.62%. Keywords Fly ash, adsorption, removal of phosphorus, Alkali modification 精品 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc325362287 摘 要 PAGEREF _Toc325362287 \hI HYPERLINK \l _Toc325362288 ABSTRACT PAGEREF _Toc325362288 \h II HYPERLINK \l _Toc325362291 1 绪论 PAGEREF _Toc325362291 \h 1 HYPERLINK \l _Toc325362292 1.1粉煤灰的组成及结构 PAGEREF _Toc325362292 \h 1 HYPERLINK \l _Toc325362293 1.1.1粉煤灰的组成 PAGEREF _Toc325362293 \h 1 HYPERLINK \l _Toc325362294 1.1.2粉煤灰结构 PAGEREF _Toc325362294 \h 2 HYPERLINK \l _Toc325362295 1.2粉煤灰的性质 PAGEREF _Toc325362295 \