摘要
水体中溶解有机磷(DOP)是造成水质磷污染的重要组成成分,而胺基改性锆基金属有机框架材料(Zr-MOFs)因其稳定性、可调孔结构及增强的催化性能,成为在中性条件下分解去除溶解有机磷的潜力解决方案.本研究合成了胺改性的MOF-808(Zr)@NH2材料,探索其在中性条件下对有机磷(β-甘油磷酸钠,β-GP)的分解与去除能力.实验结果表明,胺基的引入不仅提供了微观的碱性环境,有利于反应的进行,而且显著提高了MOF-808(Zr)的催化活性.在5 min内,30 mg的MOF-808(Zr)@NH_(2)将pH为7的水体中30 mg·L^(-1)的β-GP下降至1.68 mg·L^(-1),对有机磷的分解去除率达到了95%.此外,MOF-808(Zr)@NH2在分解有机磷的过程中,生成的磷酸盐被有效吸附在材料表面,未释放到水体中,从而达到了去除生成磷酸盐的目的.该研究为解决水体中有机磷的去除提供了新思路,对水处理技术的应用具有一定的研究价值和实际意义.
Dissolved organic phosphorus(DOP)is a significant contributor to phosphorus pollution in aquatic ecosystems.Amino-functionalized zirconium-based metal-organic frameworks(Zr-MOFs)have emerged as promising materials for DOP degradation under neutral conditions due to their structural robustness,tunable porosity,and enhanced catalytic activity.In this study,an aminomodified MOF-808(Zr),denoted as MOF-808(Zr)@NH_(2),was synthesized and evaluated for its ability to hydrolytically degrade β-glycerol phosphate disodium salt(β-GP),a model DOP compound,at neutral PH.The incorporation of amino groups generated a locally alkaline microenvironment that accelerated hydrolysis and markedly enhanced the catalytic performance compared to the unmodified MOF.Under optimized conditions,30 mg of MOF-808(Zr)@NH_(2) reduced the β-GP concentration(30 mg·L^(-1),pH=7)to 1.68 mg·L^(-1)within 5 minutes,achieving a removal efficiency of 95%.Additionally,the released inorganic phosphate was effectively captured on the MOF surface,minimizing its re-dissolution into the aqueous phase.These findings highlight a dual-functional mechanism of organophosphate degradation coupled with phosphate sequestration,offering a promising strategy for mitigating phosphorus pollution in water treatment applications.
作者
姜蕊
黄旭光
田永强
邹毅彬
JIANG Rui;HUANG Xuguang;TIAN Yongqiang;ZOU Yibin(College of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Zhangzhou,363000,China;Fujian Province University Key Laboratory of Pollution Monitoring and Control,Zhangzhou,363000,China;Key Laboratory of Modern Separation Analysis,Zhangzhou,363000,China;Xiamen Environmental Monitoring Center of Fujian Province,Xiamen,361000,China)
出处
《环境化学》
北大核心
2025年第8期3110-3120,共11页
Environmental Chemistry
基金
福建省中青年教师教育科研项目(JZ230029)
国家自然科学基金(41976150)
福建省自然科学基金(2024J01808)
福建省环保科技计划项目(2024R018)资助.
关键词
锆基金属有机框架材料
胺改性
有机磷
分解
吸附.
zirconium-based metal organic framework materials
amine modification
organophosphorus
decompose
adsorption
作者简介
通信联系人:邹毅彬,E-mail:308220052@qq.com。
