海藻酸钠负载MIL-53(Fe)/UV/H_(2)O_(2)体系降解四氢呋喃效果评估  

Evaluation of the Degradation Eff ect of Tetrahydrofuran by Sodium Alginate Loaded MIL-53(Fe)

作　　者：陈盛彬 Chen Shengbin(Yong'an Ecological Environment Bureau,Sanming City,Fujian Province,Fujian,366000)

机构地区：[1]福建省三明市永安生态环境局,福建366000

出　　处：《当代化工研究》2024年第22期62-64,共3页Modern Chemical Research

摘　　要：为提升MIL-53(Fe)的循环使用效率,采用直接混合法将其负载于海藻酸钙水凝胶中制备MCH(Fe)复合材料,并通过分析其光催化性能、动力学参数、共存阴离子影响等,得出:MCH(Fe)0.75/UV/H_(2)O_(2)体系对THF去除率在60 mins内最大可达到86.67%,显著高于UV/H_(2)O_(2)体系,同时其准一阶降解速率常数(0.0344 min^(-1))也大于UV/H_(2)O_(2)体系(0.0205 min^(-1));CO_(3)^(2-)和Cl^(-)因为清除·OH能力强,对THF降解的抑制作用较大,NO_(3)^(-)有一定抑制作用,而SO_(4)^(2-)几乎不产生影响;经过8次重复实验,THF的去除率依然能保持80%左右,表现出优异的循环使用性。综上,MCH(Fe)_(0.75)依然保持良好降解性能,并且循环使用效率相较于粉体MIL-53(Fe)有了显著提升。In order to improve the recycling efficiency of MIL-53(Fe),MCH(Fe)composites were prepared by directly mixing onto calcium alginate hydrogel.Through analyzing its photocatalytic performance,kinetic parameters,and the influence of coexisting anions,it was found that the maximum THF removal rate of MCH(Fe)0.75/UV/H_(2)O_(2) system in 60 mins could reach 86.67%,which was significantly higher than that of UV/H_(2)O_(2) system,and its quasi first order degradation rate constant(0.0344 min^(-1))was also greater than that of UV/H_(2)O_(2) system(0.0205 min^(-1));CO_(3)^(2-)and Cl^(-)have strong ability to clear·OH,and have a significant inhibitory effect on THF degradation.NO_(3)^(-)has a certain inhibitory effect,while SO_(4)^(2-)has almost no effect;After 8 cyclic experiments,the removal rate of THF can still maintain around 80%,demonstrating excellent recyclability.Overall,MCH(Fe)_(0.75) still maintains good degradation performance,and the recycling efficiency has significantly improved compared to MIL-53(Fe)powder.

关 键 词：MIL-53(Fe) 负载 四氢呋喃 光催化 

分 类 号：X171.5[环境科学与工程—环境科学] X703[化学工程] TQ426