基于锆-有机骨架的印染废水中Cr(Ⅵ)的荧光检测  

Fluorescence detection of Cr(Ⅵ) from printing and dyeing wastewater by zirconium-organic framework

作　　者：管斌斌 李庆[1,2] 陈灵辉 徐宇婷 樊增禄[3] GUAN Binbin;LI Qing;CHEN Linghui;XU Yuting;FAN Zenglu(Xi′an Key Laboratory of Textile Chemical Engineering Auxiliaries, Xi′an Polytechnic University, Xi′an, Shaanxi710048, China;School of Environmental & Chemical Engineering, Xi′an Polytechnic University, Xi′an, Shaanxi710048, China;Key Laboratory of Functional Textile Materials and Products, Ministry of Education, Xi′an Polytechnic University, Xi′an, Shaanxi 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]西安工程大学功能性纺织材料及制品教育部重点实验室,陕西西安710048

出　　处：《纺织学报》2021年第2期122-128,共7页Journal of Textile Research

基　　金：国家自然科学基金面上项目(22078253);国家级大学生创新训练计划项目(S202010709027);陕西省重点研发计划项目(2020GY-276);陕西省教育厅专项项目(19JC016);西安市科技计划项目(2019217114GXRC007CG008-GXYD7.1,BLKJ2020YYJS-0001);西安工程大学研究生创新基金项目(chx2020023)。

摘　　要：针对印染废水中重金属铬Cr(Ⅵ)离子造成的污染,采用氯化锆与2,2’-联喹啉-4,4’-二甲酸(H2L)反应,合成了Zr-金属有机骨架(Zr-MOF)。经粉末X射线衍射表征证实Zr-MOF在水中和强酸/碱环境中具有结构稳定性。经荧光测试证明Zr-MOF的光致发光性能。对水中Cr(Ⅵ)离子的荧光传感检测结果表明,Zr-MOF在多种混合阴/阳离子的干扰下,可以对水中痕量的Cr O42-和Cr2O72-离子进行高选择性荧光淬灭识别和定量检测,其检出限分别为6.704和11.232 mg/L。并提出了Zr-MOF的光致发光和荧光淬灭检测机制。此外,经过7次连续的荧光检测循环后,Zr-MOF的荧光发射强度仍能维持在95%以上。Considering the pollution caused by heavy metal chromium ions in printing and dyeing wastewater,zirconium chloride and 2,2’-biquinoline-4,4’-dicarboxylic acid (H2L) were used to synthesize Zr-metal organic framework (Zr-MOF).The structural stability in water and in strong acid/base environments and photoluminescence property of Zr-MOF were confirmed by powder X-ray diffraction and fluorescence tests.The results of fluorescence sensing detection of Cr(Ⅵ) ions show that Zr-MOF performs highly selective fluorescence quenching recognition and quantitative detection towards trace CrO42-and Cr2O72-ions in water,under the interference of a variety of mixed anion and ions.The detection limits are confirmed to be 6.704 and 11.232 mg/L for CrO42-and Cr2O72-ions,respectively.The photoluminescence and fluorescence quenching detection mechanisms of Zr-MOF are proposed.Furthermore,after 7 consecutive fluorescence detection cycles,the fluorescence emission intensity of ZrMOF still retains at above 95%.

关 键 词：印染废水 铬(Ⅵ) Zr-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]