基于德克斯/酸盐/氨基酸的环保多孔水凝吸附剂,用于有效地从水溶液中去除Be (II)
Xu Zhao1, Qingliang Wang2, Yige Sun3
1School of Nuclear Science and Technology, University of South China, Hengyang 421001, Hunan, China.
概括
一种新的水凝吸附剂GHPN有效地从水中去除 (Be(II)). 这种环保材料具有很高的选择性和容量,为污染提供了有希望的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 吸附技术是一种吸附技术.
背景情况:
- 水溶液中的 (Be(II)) 污染对环境和健康构成风险.
- 开发高效和选择性的吸附剂对于水资源整治至关重要.
- 现有的方法往往缺乏环保性或足够的吸附能力.
研究的目的:
- 设计和合成一种新型,环保的多孔水凝吸附剂 (GHPN).
- 研究GHPN对Be的吸附性能和机制.
- 评估GHPN在水溶液中的可重复使用性和潜在应用.
主要方法:
- 使用德克斯,酸盐和氧化合成GHPN.
- 吸附实验以确定选择性,容量,动力学和热力学.
- 描述和理论计算以阐明吸附机制.
- 回收测试,以评估吸附剂的可重复使用性.
主要成果:
- 对于Be{II},GHPN的选择性很高,分布系数 (Kd) 为1.53 × 104 mL/g.
- 理论上的吸附能力在35°C和pH值为6.5时达到43.75mg/g,表明发生了自发的外热过程.
- 在5个重复使用周期后,吸附和脱吸效率保持在80%以上.
- 酸盐,基和氨基群被确定为负责Be (II) 复合的关键功能群.
结论:
- GHPN是一种高效和环保的吸附剂,用于去除Be (II).
- 吸附机制涉及表面沉,复杂化和连接物交换.
- GHPN表现出优异的选择性,容量和可回收性,显示出治疗污染水的巨大潜力.
更多相关视频
相关概念视频
00:56Extraction: Advanced Methods
446
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
446
01:09Ion-Exchange Chromatography
455
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
455
01:15Dialysis
648
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
648
01:17Ion Exchange
591
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
591