基于二氧化锰纳米材料的COD去除性能及动力学行为研究  

The COD removal performance and kinetic behavior of MNO_(2)nanomaterials

作　　者：马春蕾 王千慧 郭江锐 徐妍 贾瑞思 王琦 Ma Chunlei;Wang Qianhui;Guo Jiangrui;Xu Yan;Jia Ruisi;Wang Qi(Chemistry&Chemical Engineering Department,Taiyuan Institute of Technology,Taiyuan 030008)

机构地区：[1]太原工业学院化学与化工系,太原030008

出　　处：《化工新型材料》2024年第4期166-171,共6页New Chemical Materials

基　　金：2023年山西省高等学校科技创新项目(2023L337);太原工业学院国家级大学生创新创业训练计划(20231138)。

摘　　要：采用脱脂棉(DC)作为模板和还原剂,通过原位氧化还原反应温和制备DC负载的MNO_(2)纳米颗粒(MNO_(2)NPs/DC),并对其形貌、组成进行表征。以骨胶模拟废水提供化学需氧量(COD)。利用MNO_(2)NPs/DC优异的吸附及催化氧化活性和DC的操作便捷性,进一步探究MNO_(2)NPs/DC对COD的去除性能。结果表明:MNO_(2)NPs较为均匀地分散于DC纤维表面。室温条件下通过简单的浸泡搅拌,MNO_(2)NPs/DC对COD仅21min的去除率可达64.03%,并且可通过增加材料用量和材料浸泡时间来提高去除率。动力学模型拟合结果表明,MNO_(2)NPs/DC对COD的去除过程更符合拟二级动力学模型。Degreased cotton(DC)was used as template and reducing agent to gently prepare DC-supported MNO_(2)nanoparticles(MNO_(2)NPs/DC)by in-situ redox reaction.The morphology and composition of MNO_(2)NPs/DC were characterized.Chemical oxygen demand(COD)was provided by simulating wastewater with bone glue.Leveraging the excellent adsorption and catalytic oxidation activities of MNO_(2)NPs/DC and the convenient operation performance of DC,the removal performance of MNO_(2)NPs/DC for COD was further explored.The experimental results showed that MNO_(2)NPs was dispersed evenly on the surface of DC fibers.The removal rate of COD by MNO_(2)NPs/DC could reach 64.03%in only 21 min by simple soaking and stirring at room temperature,and the removal rate could be improved by increasing the amount of material and soaking time.The kinetic model fitting results indicated that the removal process of COD by MNO_(2)NPs/DC was more consistent with the pseudo-second-order kinetic model.

关 键 词：脱脂棉 二氧化锰纳米颗粒 化学需氧量 去除 

分 类 号：TQ152[化学工程—电化学工业] TM53[电气工程—电器]