钇锆双金属MOFs对有机膦阻垢剂HEDP的吸附研究  

Adsorption of yttrium/zirconium bimetallic organic frameworks on organic phosphonate scale inhibitor HEDP

作　　者：刘登科 杨庆峰[1] 刘阳桥[3] LIU Dengke;YANG Qingfeng;LIU Yangqiao(Center for Green Chemical Engineering Technology Research and Development,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China)

机构地区：[1]中国科学院上海高等研究院绿色化学工程技术研究与发展中心,上海201210 [2]中国科学院大学,北京100049 [3]中国科学院上海硅酸盐研究所,上海200050

出　　处：《工业水处理》2024年第2期73-78,86,共7页Industrial Water Treatment

基　　金：国家自然科学基金项目(51878647)。

摘　　要：采用溶剂热法首次合成了新型钇锆双金属有机框架(YZr-MOF)吸附材料,并对其结构和表面性质进行了表征,研究了YZr-MOF对有机膦阻垢剂羟基亚乙基二膦酸(HEDP)的吸附行为和性质。实验结果表明,YZr-MOF呈现出大小均匀的球形颗粒结构,比表面积为912.862 m^(2)/g;在298 K时,YZr-MOF理论最大吸附量为66.293 mg/g(以P计)。吸附过程符合准二级动力学和Langmuir模型,吸附过程为吸热过程,温度升高有利于YZr-MOF吸附HEDP。在吸附实验中,YZr-MOF的最佳质量浓度为0.2 g/L;YZr-MOF在较宽的pH范围内有着良好的稳定性,并且经过6次循环后,仍保持显著的吸附率。结合相关实验和FTIR、XPS的表征结果表明,静电作用和配体交换为主要吸附机理。A new yttrium zirconium bimetallic organic framework(YZr-MOF)adsorption material was synthesized by solvothermal method for the first time,and the structure and surface properties of adsorbents were characterized.Adsorption behavior and properties on organic phosphonate scale inhibitor 1-hydroxyethylidene-1,1-diphosphonic acid(HEDP)were investigated.Experimental results indicated that the structure of MOFs presented spherical particles of uniform size.The specific surface area of the adsorbent was 912.862 m^(2)/g.At 298 K,the theoretical maximum adsorption capacity of YZr-MOF was 66.293 mg/g(calculated in P).The adsorption process was fitted well with the pseudo-second-order kinetics equation and the Langmuir model.Moreover,the adsorption process was an endothermic process.The temperature rise was conducive to YZr-MOF adsorption of HEDP.In the adsorption experiments,the optimal amount of YZr-MOF was 0.2 g/L.YZr-MOF had good stability over a wide pH range and maintained a significant adsorption rate after six cycles.Combined with the relevant experiments and the characterization results of FTIR and XPS,electrostatic interaction and ligand exchange were the main adsorption mechanisms.

关 键 词：金属有机框架 有机膦阻垢剂 吸附 配体交换 

分 类 号：X703[环境科学与工程—环境工程] TQ424[化学工程]