酸性水钠锰矿对水中Mn(Ⅱ)的吸附和催化氧化特性的研究  

Adsorption and catalyzed oxidation properties of Mn(Ⅱ) on the surface of acidic birnessite oxide

作　　者：刘继伟[1] 李金成[1] 刘俊峰[1] 杨良[1] 

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266033

出　　处：《青岛理工大学学报》2014年第5期75-80,共6页Journal of Qingdao University of Technology

摘　　要：采用酸性水钠锰矿对水中Mn（Ⅱ）的吸附和催化氧化性能进行了研究.吸附试验结果表明：酸性水钠锰矿对水中Mn（Ⅱ）的吸附等温线符合Langmuir方程,该吸附是单分子层吸附;动力学实验结果表明,吸附过程更符合Lagergren准二级动力学方程,酸性水钠锰矿对水中Mn（Ⅱ）的吸附饱和吸附量约为146.37mg/g.pH对酸性水钠锰矿对水中Mn（Ⅱ）的吸附的影响较大,随着pH的增加,酸性水钠锰矿对水中Mn（Ⅱ）的吸附量增加;对于初始浓度为10mg/L,体积为100mL的含锰溶液,要达到最大去除效果,酸性水钠锰矿的最适投加量为15mg.氧化实验结果表明：在曝气的条件下,酸性水钠锰矿可以促进水中溶解氧对Mn（Ⅱ）的氧化,最大氧化量为46.79mg/g.pH对酸性水钠锰矿对水中Mn（Ⅱ）的氧化的影响较大,随着pH的增加,酸性水钠锰矿对水中Mn（Ⅱ）的氧化量增加,pH的最佳范围为9-10.Based on the study of acidic birnessite oxide adsorbing and catalyzed oxidating Mn（Ⅱ）in water,adsorption experiments show that the process of the adsorption is more suitable to Langmuir adsorption isotherm equation.The adsorption is monolayer adsorption.Dynamic experiment results prove that the process of the adsorption is more suitable to Lagergren quasi secondary dynamics equation.When acidic birnessite oxide is saturated,the saturated adsorption amount of adsorbing Mn（Ⅱ）in water is about 146.37mg/g.pH has heavy influence on the adsorption of Mn（Ⅱ）in water by the acidic birnessite.With the increasing of pH,the adsorption amount of adsorbing Mn（Ⅱ）by the acidic bimessite is increasing.For initial concentration for 10mg/L,the volume of 100 mL of the solution,the best dosing quantity of he acidic birnessite is 15 mg for the best effect.Oxidation experiments indicate that under the condition of critical gas,acidic birnessite can promote oxygen to oxidate Mn（Ⅱ）,the measure of the oxidation is 46.79mg/g.pH has heavy influence on the oxidation of Mn（Ⅱ）in water by acidic birnessite,with the increasing of pH,oxidation amount of Mn（Ⅱ）by the acidic birnessite is increasing,the best pH is 9-10.

关 键 词：酸性水钠锰矿 吸附 Mn(Ⅱ) PH 投加量 催化氧化 

分 类 号：X55[环境科学与工程—环境工程]