| 陈希琳,高旭升,刘笑旻,舒逸飞,黄青青,王林,孙约兵,赵玉杰,梁学峰.氨基改性坡缕石对金属阳离子的吸附选择性特征[J].农业环境科学学报,2026,45(1):199-212. |
| 氨基改性坡缕石对金属阳离子的吸附选择性特征 |
| Sorption selectivity of metal cations on amino grafted palygorskite |
| 投稿时间：2025-03-02 |
| DOI：10.11654/jaes.2025-0201 |
| 中文关键词: 氨基 坡缕石 吸附 选择性 |
| 英文关键词: amino palygorskite sorption selectivity |
| 基金项目:国家重点研发计划项目（2024YFD1701103）；中国农业科学院科技创新工程项目（CAAS-CSGLCA-202302） |
| 作者 | 单位 | E-mail | | 陈希琳 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 高旭升 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 刘笑旻 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 舒逸飞 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 黄青青 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 王林 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 孙约兵 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 赵玉杰 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | | | 梁学峰 | 农业农村部产地环境污染防控重点实验室/天津市农业环境与农产品安全重点实验室, 农业农村部环境保护科研监测所, 天津 300191 | liangxuefeng@caas.cn |
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| 中文摘要: |
| 为了探讨氨基改性坡缕石（Amino grafted palygorskite，AGP）对多种金属阳离子的吸附选择性特征，本试验开展了单一离子吸附动力学、等温线及多元离子竞争吸附试验以及X射线光电子能谱（XPS）分析，研究了AGP对8种金属离子（Cd2+、Cu2+、Zn2+、Ni2+、Mn2+、Fe3+、Pb2+、Hg2+）的吸附规律。结果表明：AGP吸附阳离子的过程可由拟二级吸附动力学方程和Langmuir等温线拟合，氨基改性增强了坡缕石对Pb2+、Zn2+和Cd2+的吸附，Pb2+吸附量较原始坡缕石显著增加了82.9%，且吸附为自发过程。在多元金属离子混合竞争吸附体系中，AGP展现出对Pb2+的高效选择性吸附能力，Fe3+对Pb2+吸附的抑制作用最大，且AGP对Fe3+吸附的主要贡献来自于坡缕石本身而非氨基改性。XPS分析结果表明，坡缕石吸附金属阳离子主要通过表面羟基的弱相互作用，而AGP吸附Pb2+、Zn2+的选择性吸附机制主要为更强的氨基络合作用。AGP对Pb2+的优异选择性吸附性能，进一步强化了其在重金属污染选择性治理中的应用潜力，试验结果也为研发针对Pb2+的靶向性吸附剂和钝化剂提供了理论支持。 |
| 英文摘要: |
| To investigate the adsorption selectivity characteristics of amino grafted palygorskite（AGP）for various metal cations, this study conducted single-cation adsorption kinetics, isotherms, multi-cation competitive adsorption experiments, and X-ray photoelectron spectroscopy（XPS）analysis to examine the adsorption behavior of AGP towards eight metal cations（Cd2+, Cu2+, Zn2+, Ni2+, Mn2+, Fe3+, Pb2+, Hg2+）. The adsorption process of various metal cations on AGP can be described by a pseudo second order adsorption kinetics equation and Langmuir isotherm. The amino modification enhanced the adsorption of Pb2+, Zn2+, and Cd2+ by palygorskite, with the Pb2+ adsorption capacity increasing significantly by 82.9% compared to the original palygorskite, and the adsorption process was thermodynamically spontaneous. In the competitive adsorption of mixed solution systems with multiple coexisting metal cations, AGP exhibited efficient selective adsorption ability for Pb2+, with Fe3+ exhibiting the most significant inhibitory effect on Pb2+ adsorption, while the sorption of Fe3+ on AGP was mainly the contribution of palygorskite rather than the amino modification. XPS analysis indicated that the adsorption of metal cations on palygorskite mainly occurred through weak interactions of surface hydroxyl groups, while the selective adsorption mechanism of Pb2+ and Zn2+ on AGP was primarily through stronger amino complexation. The excellent selective adsorption performance of AGP for Pb2+ further enhanced its potential application in the selective treatment of heavy metal pollution, and provided theoretical support for the development of targeted adsorbents and immobilization amendments for Pb2+. |
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