利用MnO2纳米针吸附水中As的研究

利用MnO2纳米针吸附水中As的研究(7300字)
摘  要：本论文利用水热法制备了MnO2纳米针，并研究了时间、MnO2纳米针的用量、pH，As（Ⅴ）浓度对MnO2纳米针吸附水中As（Ⅴ）的影响。结果表明，MnO2纳米针对As（Ⅴ）吸附效率随着时间的增加而增加；MnO2纳米针的用量的增加而增加；随着随着pH的增加而减小；随着As（Ⅴ）浓度增加而减小。当用量为50mg时，吸附率为92.88％。当pH为3时，吸附率为93.44％。当吸附时间为90min时，吸附率为76.1％。最大吸附量为38.032mg/g。纳米MnO2对水中的砷具有良好的吸附效果，是较为理想的吸附砷的材料。
关键词：MnO2纳米针；As（Ⅴ）；吸附

THE ADSORPTION OF ARSENIC FROM WATER BY MnO2 NANO-NEEDLES
Abstract： This study made a analysis of the influence of time, MnO2 dosage, pH and As concentration on effect of the absorption of arsenic from water by MnO2 Nano-needles. The promotion of MnO2 Nano-needles on the removal of arsenic from water increased with the increase in time, increased with the increase in dosage of MnO2 Nano-needls, decreased with increase in system pH and decreased with increase in concentration of As. The optimum dosage is 50mg. The optimum pH is 3. The optimum time is 90min. The maximum adsorption capacity is 38.032mg/g. The results demonstrated that MnO2 Nano-needle is the ideal material for the adsorption of As.
Key Words：MnO2 Nano-needle; Arsenic water