摘 要现阶段,改性粉煤灰吸附处理有机废水中有毒物质的探究普遍吸引了人们的眼球。粉煤灰能吸附有机废水中有毒的物质,效果很好。本实验采用HDTMA改性粉煤灰吸附处理含2,4,6三氯酚废水。研究的目的是调查改性后的粉煤灰这一低成本吸附剂,在不同温度、溶液pH值、反应时间、改性粉煤灰投加量条件下对去除效果的影响。探究出了3个温度下的吸附等温线。实验结果表明,2,4,6,三氯酚在30分钟时,达到吸附平衡。2,4,6三氯酚的去除率能达到82%。而改性后的粉煤灰最佳投加量为400mg / L。最佳pH值为7。3;低温有利于吸附;初始浓度增加,吸附效果降低。HDTMA改性粉煤灰对水中2,4,6三氯酚有不错的吸附能力,吸附符合Langmuir等温方程。吸附热H小于0,反应过程是放热的过程。也对动力学进行了探究。吸附动力学能用Bangham模式拟合。发现微波对于2,4,6三氯酚是有去除作用的,在处理污水方面,与粉煤灰吸附有协同的作用。87119
毕业论文关键字:改性粉煤灰;吸附;2,4,6三氯酚;动力学;热力学:微波
Abstract Today, the Modified Fly Ash explore organic wastewater toxic substances generally attract people's attention。 Ash can absorb toxic organic substances in wastewater, with good results。 In this study, HDTMA Modified Fly Ash containing 2,4,6-trichloropHenol Wastewater。 Purpose of the study was to investigate the modified fly ash This low-cost adsorbent, the impact at different temperatures, pH, reaction time, modified fly ash dosage on the removal of conditions。 Determination of adsorption isotherms at different temperatures, and the adsorption kinetics and thermodynamics models were discussed。
The results showed that 2,4,6-trichloropHenol absorbed the best time is 30 minutes, 2,4,6-trichloropHenol removal rate can reach 82%。 The modified fly optimal dose of 400mg /25mL。 H optimum pH value of 7。3; cold temperatures favor adsorption; increasing the initial concentration, adsorption effect is reduced。 HDTMA modified fly ash in water 2,4,6 trichloropHenol have good adsorption capacity, the Langmuir adsorption isotherm equation。 The adsorption energy is less than zero, the adsorption reaction is exothermic。 The adsorption kinetics can Bangham model fitting。 Adsorption experiments and a separate microwave experiment alone fly ash, fly ash and finally found the microwave treatment of 2,4,6-trichloropHenol have a synergistic effect。
Key Words: modified fly ash; adsorption; 2,4,6-trichloropHenol; kinetics; thermodynamics: Microwave
目 录
第一章 绪论 1
1。1 氯酚类化合物的污染概况 1
1。1。1 2,4,6-三氯酚的结构、性质 2
1。1。2 2,4,6-三氯酚对环境的危害 2
1。1。3 2,4,6-三氯酚的处理方法 3
1。2粉煤灰法吸附处理有机污水的技术 3
1。2。1粉煤灰处理有机废水的吸附机理 4
1。2。2粉煤灰吸附处理有机废水的影响因素和优势 5
1。2。3粉煤灰吸附处理有机污水技术的现状 6
1。2。4粉煤灰吸附处理有机污水技术的展望 7
1。2。5粉煤灰的改性 8
1。2。6改性粉煤灰在处理有机废水上的应用 8
1。3微波技术概述 9
1。3。1 微波辐射机理和其特点