【作者】 靳朋勃；

【导师】 吴春笃；

【作者基本信息】 江苏大学 ， 农业生物环境与能源工程， 2007， 硕士

【摘要】 利用粉煤灰的中含有大量的氧化硅、氧化铝的特点，采用酸浸水热晶化的工艺制成沸石化粉煤灰吸附材料，用于吸附对农业水资源危害较大的印染废水和生活污水，以期提高粉煤灰资源的综合利用率，达到以废治污，保护农业水资源之目的。论文叙述了粉煤灰的理化性质、矿物组成，粉煤灰的综合利用现状特别是粉煤灰在水处理中的应用情况，以及粉煤灰吸附材料的研究进展；考察了碱液浓度、液固比、晶化时间、焙烧温度等因素对沸石化粉煤灰吸附材料的吸附性能的影响；以亚甲基蓝模拟废水为研究对象，讨论了粉煤灰投加量、废水pH值、吸附时间和吸附温度等因素对废水脱色率的影响；对实际染料废水和生活废水进行了吸附实验，讨论了粉煤灰投加量、废水pH值、吸附时间等因素对脱色率及COD去除率的影响；进行了粉煤灰吸附材料的再生实验；初探了沸石化机理和吸附机理。实验结果表明：（1）制备沸石化粉煤灰吸附材料实验的参数为：200目粉煤灰经8mol／L H₂SO₄预处理后，在NaOH浓度为3mol／L，液固比10，晶化温度为100℃的条件下水热反应8h，水热产物在500℃下焙烧1h。（2）粉煤灰的投加量对亚甲基蓝模拟废水脱色率的影响最大，吸附温度对脱色率的影响最小。在常温下，通过10min的搅拌吸附，亚甲基蓝模拟废水的脱色率即可达到90％以上。（3）调节废水的pH值为中性，粉煤灰吸附材料的投加量为10g／L，搅拌吸附10min，可使实际染料废水的色度去除率达到80％以上，COD去除率达到70％以上；无需调节废水的pH值，粉煤灰吸附材料的投加量为8g／L，搅拌吸附8min，可使生活污水的COD去除率达90％以上。（4）再生后的吸附材料仍具有良好的吸附性能。对亚甲基蓝模拟废水的吸附实验表明：一次再生吸附材料的脱色能力是原来的85％。更多还原

【Abstract】 This program makes use of silicon dioxide and alumina in fly ash, and then activates it by alkali hydrothermal reaction after acidification to make it a kind of absorbents to be used in disposal of wastewater such as printing. The purpose is to dispose wastewater with castoff and protect agricultural water resource.In this paper, the chemical and physical properties and mineral components of fly ash are mentioned. Present condition of fly ash comprehensive utilization is also discussed especially in field of disposal of wastewater. Alkali concentration, liquid-solid ratio, reaction time and bake temperature are analyzed in experiment of absorbent preparation. Color removal rate and COD removal efficiency are studied by changing the factors such as dosage, pH value, temperature and temporal time. Reprocess test of absorbent is also researched. The mechanisms of adsorption and zeolitization are initial studied. The main results are as follows:(1) The optimal conditions to prepare absorbent is acidification time, 24h; alkali concentration, 3mol/L; liquid-solid ratio, 10; crystallization temperature, 100℃; crystallization time, 8h; sintering temperature, 500℃; sintering time, 1h.(2) Dosage is maximal influence factor to color removal rate. Temperature is minimal influence factor. Color removal rate can reach over 90% after ten-minute adsorption.(3) Color removal rate of actual printing and dyeing wastewater can reach over 80% when the condition is pH value, 7; dosage, 10g/L; temporal time, 10min. Meanwhile, its COD removal efficiency can reach over 70%. COD removal efficiency of domestic sewage can reach over 90% when the condition is dosage, 8g/L; temporal time, 8min.(4) The absorbent that had been used can be reprocessed, and the reprocessed one has good performance in the adsorption also. Its first adsorptive ability is 85% of primal absorbent.更多还原