（毕业设计论文）《酸改性粉煤灰对Mn（Ⅱ）的吸附实验研究》.docVIP

PAGE 5 PAGE 5 精品 精品 淮北师范大学 2011届学士学位论文 酸改性粉煤灰对Mn（Ⅱ）的吸附实验研究 学院、专业 生命科学学院  环境科学 研 究 方 向 环境科学 学 生 姓 名 学 号 20071503047 指导教师姓名 指导教师职称 讲 师 2011年5月28日 精品 酸改性粉煤灰对Mn（Ⅱ）的吸附实验研究 摘要 利用淮北电厂排出的固体废物粉煤灰，研究不同条件对含锰废水吸附率的影响，并通过对粉煤灰的酸改性得到酸改性粉煤灰，在研究不同条件对含锰废水吸附率的影响。实验从不同的加灰量，不同的Mn2+ 浓度和不同的接触时间三方面考虑，在PH一定的条件下，通过实验得知随粉煤灰量的增加，吸附率增大，但也有一定限制；粉煤灰吸附Mn2+的能力随Mn2+浓度的增加而减弱，对低浓度的含锰废水有较好的吸附效果；还有接触时间对吸附也有一定影响，0.5-1.0h内随时间增加吸附效果显著，1h后吸附率增长且缓慢，至2h时吸附量不再增长甚至有所下降。通过对比改性前粉煤灰和改性后粉煤灰的吸附率，可知改性粉煤灰对含锰废水的吸附效果更好。 关键词 粉煤灰；酸改性粉煤灰；吸附；含锰废水 Modification of Fly Ash by the sour and Its Application in Water Treatment with Mn2+ wangling Huaibei Normal University, 235000 Abstract Using the coal ash which were discharged from one of Huaibei power plants, this paper studied removal Mn2+ from waste water by fly ash in different conditions, and use sour to modify fly ash, this paper studied removal Mn2+ from waste water by fly ash in different conditions and selected three different experimental conditions to design the orthogonal experiment, through which we could find out the best condition in which the copper-bearing waste water was treated by fly ash. Thought of three different conditions in the experiment, the different concentrations of Mn2+ and the different contact time include the dosage of ash. The result showed that the removal ratio was increase with the increase of adsorbent dosage in the condition of PH was invariably, but there were also certain restrictions; The capacity of absorbingMn2+of the fly ash was reduced with the increase of the concentration of Mn2+ ,if the concentrations of Mn2+ in waste water was low, the adsorption was better; The contact time also have certain influence on the adsorption, it was increase with the time increasing during 1-2h, but after 2h