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软锰矿的主要成分为MuO2,其可作为一种低成本的吸附剂使用,研究其对废水中铜离子的吸附分离作用。研究Cu(II)离子的初始浓度、溶液初始pH值、吸附剂用量和粒度对吸附过程的影响。结果表明:随着吸附剂的用量增加,吸附铜的比例增大。在不同铜浓度下,溶液的初始pH值为自然状态时的吸附量最大。当初始溶液浓度、初始p H值、接触时间、搅拌速度、粒径大小和吸附剂用量分别为0.0025 mol/L、自然状态、180 min、200 r/min和6 g/L时,软锰矿对铜的吸附率为96.5%。对吸附过程中的等温吸附曲线和动力学进行研究。结果表明:该平衡吸附数据符合Langmuir等温模型,而过程的动力学符合伪二阶动力学模型。
The main component of pyrolusite MuO2, which can be used as a low-cost adsorbent to study its role in the adsorption of copper ions in wastewater. The initial concentration of Cu (II) ions, the initial pH of the solution, the amount of adsorbent and the particle size on the adsorption process were investigated. The results show that with the increase of adsorbent dosage, the proportion of adsorbed copper increases. At different copper concentrations, the initial pH value of the solution is the highest when it is in its natural state. When the initial solution concentration, initial pH, contact time, stirring speed, particle size and adsorbent dosage were 0.0025 mol / L, natural state, 180 min, 200 r / min and 6 g / L, Copper adsorption rate of 96.5%. The adsorption isotherm curve and kinetics were studied. The results show that the equilibrium adsorption data are in accordance with the Langmuir isothermal model, while the kinetics of the process are in accordance with the pseudo second-order kinetic model.