通过表面离子印记的二胺基吸附剂选择性吸附V的机制研究
Qintao Yang1, Zechao Zheng1, Chenhua Shu1
1The Jiangxi Key Laboratory of Preparation and Application of Black Talc Functional Materials, Shangrao Normal University, Shangrao 334001, China.
Langmuir : the ACS journal of surfaces and colloids
|September 3, 2025
概括
一种新型吸附剂,As(V) -IID,可以选择性地从水中去除酸[As(V] (62.78 mg/g). 这种带有离子印记的材料比其他氧离子具有很好的选择性,为污染提供了有前途的解决方案.
科学领域:
- 环境化学
- 材料科学
- 吸附科学
背景情况:
- 水中的污染对健康构成重大风险.
- 开发有选择性和高效的吸附剂去除至关重要.
- 现有的方法往往缺乏对物种的选择性和能力.
研究的目的:
- 合成和描述一种用于选择性去除的新型离子印记吸附剂.
- 研究开发的吸附剂的吸附能力,选择性和机制.
- 用离子印记材料对氧离子的选择性识别提供见解.
主要方法:
- 使用多孔二氧化 (DE) 和4-皮科林酸 (4-PA) 的表面离子印记技术.
- 选择性吸附实验以确定吸附能力和选择性系数.
- 使用FTIR,SEM-EDS和XPS进行表征.
- 密度函数理论 (DFT) 的计算以阐明结合机制.
主要成果:
- 在pH值为4.0的情况下,As{V}-IID吸附剂的吸附能力为62.78 mg/g.
- 对于As{V}比Cr{VI} (K=12.14) 和Mo{VI} (K=27.79) 的高选择性被观察到.
- 吸附遵循伪二次动力学和兰木尔模型,其中含的组被确定为关键结合点.
结论:
- 在选择性地从水溶液中去除As(V) 时,IID吸附剂表现出极好的性能.
- DFT计算证实了As(V) 通过复合与含有N的功能组的选择性结合.
- 这项研究为设计具有离子印记的吸附剂提供了宝贵的见解,以有效地去除氧化离子.
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