MIL-100(Fe, Mn)衍生物活化过氧化氢降解水中尼泊金丁酯  

DEGRADATION OF BUTYLPARABEN IN WATER BY ACTIVATION OF HYDROGEN PEROXIDE BY MIL-100(Fe,Mn)DERIVATIVES

作　　者：苑宇杰 林涛[1] YUAN Yujie;LIN Tao(College of Environment,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学环境学院,南京210098

出　　处：《环境工程》2024年第5期35-41,共7页Environmental Engineering

基　　金：国家重点研发计划“定向去除抗生素等的氧化-生物协同技术研发与示范”(2022YFC3203702)。

摘　　要：为实现水中典型的药物类新污染物尼泊金丁酯(BPB)的氧化降解,通过构建过渡金属的活性位点以及调控材料的结构特性,利用水热法及煅烧法合成了MIL-100(Fe,Mn)衍生物催化剂用于催化H_(2)O_(2)降解水中BPB。详细探究了催化剂投加量和水环境化学条件(如初始pH、温度、共存离子等)对MIL-100(Fe,Mn)衍生物催化体系降解水中BPB的影响,同时对反应体系中活性物种进行鉴定分析。结果表明:MIL-100(Fe,Mn)衍生物催化体系在较宽pH范围和不同溶液温度范围(10℃~40℃)内均表现出良好的催化性能,且适当提高催化剂投加量有助于活化H_(2)O_(2)氧化水中BPB,优选pH=7.0、298 K(25℃)反应条件下投加0.2 g/L催化剂,然后加入1 mmol/L的H_(2)O_(2)可实现反应15 min内氧化降解96%的BPB。另外,反应体系中引入HCO-3对BPB降解起明显的抑制作用,但不同浓度的NO_(3)^(-)和Cl-对水中BPB降解效果影响不大。MIL-100(Fe,Mn)衍生物催化剂通过Fe、Mn金属离子之间的协同作用,可促进H_(2)O_(2)分解产生·OH,进而快速氧化水中BPB。The MIL-100(Fe,Mn)derivative catalyst,with new established active sites and regulated structure,was synthesized by hydrothermal method and calcination method to activate H_(2)O_(2) for the removal of the typical new pharmaceutical pollutants,butylparaben(BPB)in water.The effects of catalyst dosage and water environmental chemical conditions(such as initial pH,reaction temperature,co-existing ions,etc.)on the degradation of BPB in water by MIL-100(Fe,Mn)derivatives were detailly investigated,and the active species in the reaction system were also analyzed.The results showed that the MIL-100(Fe,Mn)derivative catalytic system showed good catalytic performance in a wide range of pH and solution temperature,and increasing the catalyst dosage was conducive to the activation of H_(2)O_(2) oxidation of BPB in water.Preferably,96%of BPB could be oxidized within 15 min by the MIL-100(Fe,Mn)derivative catalytic system under the conditions of pH=7.0,298 K(25℃),0.2 g/L catalyst and 1 mmol/L H_(2)O_(2).In addition,the introduction of HCO~-_3 in the reaction system significantly inhibited the degradation of BPB,but different concentration of NO_(3)^(-) and Cl~-had little effect on the degradation of BPB in water.The synergistic interaction between Fe/Mn metal ions on the surface of MIL-100(Fe,Mn)derivative catalyst could promote the decomposition of H_(2)O_(2) to generate·OH,and then rapidly oxidize BPB in water.

关 键 词：金属有机骨架材料 非均相催化氧化 过氧化氢 尼泊金丁酯 金属氧化物 

分 类 号：X703[环境科学与工程—环境工程]