锆-金属有机骨架对印染废水中Cr(Ⅵ)的高效检测  

High efficiency detection of Cr(Ⅵ)in printing and dyeing wastewater by Zr-metal organic frameworks

作　　者：李庆[1,2] 陈灵辉 李丹[1,2] 吴志强 樊增禄 LI Qing;CHEN Linghui;LI Dan;WU Zhiqiang;FAN Zenglu(Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries, Xi’an Polytechnic University, Xi’an 710048, China;School of Environmental and Chemical Engineering, Xi’an Polytechnic University, Xi’an 710048, China;Key Laboratory of Functional Textile Materials and Products, Ministry of Education,Xi’an Polytechnic University, Xi’an 710048, China)

机构地区：[1]西安工程大学西安市纺织化工助剂重点实验室,陕西西安710048 [2]西安工程大学环境与化学工程学院,陕西西安710048 [3]西安工程大学功能纺织材料及制品教育部重点实验室,陕西西安710048

出　　处：《西安工程大学学报》2022年第3期46-53,共8页Journal of Xi’an Polytechnic University

基　　金：国家自然科学基金面上项目(22078253);陕西省重点研发计划项目(2022GY-419);陕西省教育厅专项项目(19JC016);西安市碑林区科技计划项目(GX2003)。

摘　　要：针对印染废水中剧毒重金属铬Cr(Ⅵ)离子难以被有效检测的问题,采用溶剂热法将氯化锆(ZrCl4)与2,2′-联吡啶-5,5′-二甲酸(H_(2)L)反应,合成了荧光发射型锆-金属有机骨架(Zr-MOF)。粉末X射线衍射表征证明了Zr-MOF的高水稳定性,荧光光谱测试证实了Zr-MOF的光致发光性能。将合成的Zr-MOF用于对Cr(Ⅵ)离子进行荧光淬灭识别和检测,结果表明:Zr-MOF对Cr_(2)O^(2-)_(7)和CrO^(2-)_(4)的检出限(摩尔比)分别为2.15×10^(-9)和2.33×10^(-9),可抵御多种混合阴离子的干扰。提出了Cr(Ⅵ)离子引起Zr-MOF荧光淬灭响应的机制。In view of the effective detection of highly toxic heavy metal chromium Cr(Ⅵ)ions in printing and dyeing wastewater is rather difficult,the Zr-metal organic framework(Zr-MOF)was synthesized by combining 2,2′-bipyridine-5,5′-dicarboxylic acid(H_(2)L)under solvent thermal reaction.In addition,powder X-ray diffraction characterization demonstrated the high water stability of Zr-MOF,and fluorescence spectroscopy tests confirmed the photoluminescence properties of Zr-MOF.Moreover,the experimental results show that the synthesized Zr-MOF can be used for fluorescence quenching recognition and detection of Cr(Ⅵ)ions,and can resist the interference of a variety of mixed anions.The detection limits(Molar ratio)of Zr-MOF for Cr_(2)O^(2-)_(7) and CrO^(2-)_(4) were 2.15×10^(-9) and 2.33×10^(-9),respectively.The mechanism by which Cr(Ⅵ)ions cause the fluorescence quenching response of Zr-MOF also was proposed.

关 键 词：印染废水 Cr(Ⅵ) 锆-金属有机骨架 荧光检测 抗干扰 

分 类 号：TS190.2[轻工技术与工程—纺织化学与染整工程] X791[轻工技术与工程—纺织科学与工程]