Fe(Ⅲ)/2,6-吡啶二羧酸活化高碘酸盐强化染料脱色的效能与机制  

Periodate Activation by Fe(Ⅲ)/2,6-pyridinedicarboxylic Acid to Enhance Dye Decolorization:Efficiency and Mechanisms

作　　者：陈文政 苏晗 钟欣洋 牛丽君 冯明宝 CHEN Wen-zheng;SU Han;ZHONG Xin-yang;NIU Li-jun;FENG Ming-bao(College of Environment&Ecology,Xiamen University,Xiamen 361102,China)

机构地区：[1]厦门大学环境与生态学院,福建厦门361102

出　　处：《化学试剂》2024年第4期59-64,共6页Chemical Reagents

基　　金：厦门大学校长研究基金项目(20720210081)。

摘　　要：有色染料是环境中非常重要的污染源之一,严重威胁着水生生态环境和人类健康。由于其难以被天然降解,且传统的污水处理工艺亦无法实现其高效去除,因此急需开发绿色、高效的水处理工艺进行有色染料污染控制。发现Fe(Ⅲ)/2,6-吡啶二羧酸(2,6-PDA)可高效活化高碘酸盐(PI)实现亚甲基蓝(MB)这一典型染料的高效降解。实验结果表明,该体系在Fe(Ⅲ)浓度为10μmol/L、2,6-PDA浓度为10μmol/L和PI浓度为200μmol/L时,可在pH 3.0条件下使5 mg/L MB降解率在120 s内大于97%。该方法依托高级氧化原理和配位强化策略,利用PI对有色染料进行降解,为目前染料废水治理提供了新思路从而有效地修复了污染水体。Colored dyes pose a significant environmental pollution threat,impacting both aquatic ecosystems and human health.These dyes are difficult to naturally degrade,and conventional wastewater treatment processes struggle to efficiently remove them.Therefore,there is an urgent need to develop a green and efficient water treatment method for controlling colored dye pollution.In this study,it was discovered that the combination of Fe(Ⅲ)and 2,6-pyridinedicarboxylic acid(2,6-PDA)can effectively activate periodate(PI)and achieve efficient degradation of methylene blue(MB),a representative dye.Experimental results demonstrated that the removal efficiency of MB,even at a concentration of 5 mg/L,exceeded 97%within 120 seconds using 10μmol/L Fe(Ⅲ),10μmol/L 2,6-PDA,and 200μmol/L PI.Based on the principles of advanced oxidation and coordination strengthening,this method employs PI to degrade colored dyes,providing a novel approach for treating dye wastewater and effectively remediating polluted water.

关 键 词：亚甲基蓝 高碘酸盐 配位活化 Fe(Ⅲ) 高级氧化 

分 类 号：X703[环境科学与工程—环境工程]