化工进展2025，Vol.44Issue(3)：1726-1738,13.DOI:10.16085/j.issn.1000-6613.2024-0365
天然斜发沸石基方沸石及其改性对Pb2+的吸附性能
Adsorption performance of natural clinoptilolite based analcime and its modifications on Pb2+
摘要
Abstract
In this study,natural clinoptilolite was used for the first time as a raw material to synthesize analcime(ANA)by a hydrothermal method without the need for additional silicon-aluminium sources.The resulting ANA was further modified using NaOH and NaCl to obtain OH-ANA and Na-ANA.The synthesized zeolites were characterized by XRD,SEM,FTIR,BET,zeta potential and ICP-OES.The adsorption performance of the synthesized zeolites for Pb2+was investigated.The results showed that the specific surface areas of modified Na-ANA and OH-ANA were higher than those of ANA.The maximum adsorption capacities of Na-ANA and OH-ANA for Pb2+were 96.00mg/g and 125.54mg/g,respectively,both higher than that of ANA(71.95mg/g),indicating an improvement in the adsorption performance after modification.The adsorption of Pb2+by ANA,Na-ANA and OH-ANA was an endothermic spontaneous process following pseudo-second-order kinetics and Langmuir isotherm models.The adsorption rate was controlled by both external and intraparticle diffusion.Material characterization results showed that the adsorption mechanisms involved the synergistic effects of electrostatic attraction,ion exchange and chemical complexation for ANA,Na-ANA and OH-ANA towards Pb2+.Regeneration cycle experiments showed that OH-ANA had good renewable properties.In conclusion,ANA,Na-ANA and OH-ANA had potential applications in the removal of heavy metal ions.关键词
天然斜发沸石/水热法/方沸石/二价铅/吸附性能Key words
natural clinoptilolite/hydrothermal method/analcime/lead ion/adsorption performance分类
资源环境引用本文复制引用
张伊,么秋香,孙鸣..天然斜发沸石基方沸石及其改性对Pb2+的吸附性能[J].化工进展,2025,44(3):1726-1738,13.基金项目
国家自然科学基金(22078266,22178289,22278338) （22078266,22178289,22278338）
国家重点研发计划(2023YFB4103400) （2023YFB4103400）
陕西省重点研发计划(2024GX-YBXM-480) （2024GX-YBXM-480）
西京学院高层次人才专项(XJ21B10,XJ23T02). （XJ21B10,XJ23T02）
