生物质灰渣对染料废水中亚甲基蓝吸附性能的研究

为了探究生物质灰渣对亚甲基蓝吸附性能的影响,以生物质灰渣为原料,直接作用于亚甲基蓝模拟染料废水。研究中主要测定灰渣的灰分、元素组成和比表面积等理化性质,探究亚甲基蓝初始浓度、作用时间、温度、p H等对生物质灰渣吸附亚甲基蓝的影响,通过亚甲基蓝染料废水的吸附量,并利用吸附等温线、动力学模型对该生物质灰渣对亚甲基蓝的吸附机理进行探讨。研究表明,体系吸附24h效果最佳,对亚甲基蓝的吸附量与初始浓度、温度成正比,p H对体系吸附过程有较大的影响。符合Freundlich吸附模型和吸附动力学模型,为表面不均匀吸附,是以化学吸附为主导的物理-化学吸附过程。

In order to investigate the effect of biomass ash on methylene blue adsorption, biomass ash was used as raw material to directly act on methylene blue simulated dye wastewater. The effects of initial concentration of methylene blue, reaction time, tem- perature and pH on the adsoqotion of methylene blue by biomass ash were investigated by measuring the physical and chemical properties such as ash content, element composition and specific surface area. Based on the adsoqotion capacity- of methylene blue dye wastewater, the adsorption mechanism of methylene blue by biomass ash was studied by using adsoqotion isotheml and kinetic model. The results showed that the adsoqotion capacity- of methylene blue was in direct proportion to the initial concentration and temperature, and pH value had a great influence on the adsoqotion process of methylene blue. According to Freundlieh adsoqotion model and adsoqotion kinetics model, it is a physical-chemical adsoqotion process dominated by ehemisoqotion.