量身定制的N,N,N-三乙功能化交叉链接奇托桑珠:用于批量和固定床吸附增强和吸附的多功能矩阵
Meenu Mariam Jacob1, Muthamilselvi Ponnuchamy1, S Pavitra1
1Department of Chemical Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603 203, India.
International journal of biological macromolecules
|March 20, 2025
概括
修改后的奇托桑珠有效地从水中去除有毒的重金属,如和. 在批量和列研究中,N,N,N-三乙烯氨基功能化交叉链基托桑珠 (TEACCB) 显示出高吸附能力.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- 重金属污染,特别是和,对健康构成重大风险.
- 有效的水资源整治战略对于公共卫生和环境安全至关重要.
研究的目的:
- 开发和评估N,N,N-三乙功能化交叉链基托桑珠 (TEACCB),用于从污染水中吸附和.
- 通过批量和列研究,研究TEACCB在各种条件下的吸附性能.
主要方法:
- 桑珠被修改并与甲交叉连接,以创建TEACCB.
- 福利埃变换红外光谱法 (FTIR),扫描电子显微镜 (SEM) 和能量散射X射线分析 (EDAX) 用于表征.
- 进行了批量和列吸附实验,以评估去除效率和容量.
主要成果:
- 在40°C时,TEACCB显示出高吸附能力的Cr (在pH4时为146mg/g) 和 (在pH5时为130mg/g) 的Cr (在pH4时为146mg/g).
- 在酸性至中性pH条件下,最佳的去除发生.
- 吸附能力受吸附剂剂量和离子的存在,特别是碳酸盐的影响.
- 连续去除研究显示了92%的Cr (VI) 和78%的去除.
结论:
- TEACCB是一种高效的吸附剂,可以从水溶液中去除和.
- 吸附过程遵循兰格穆尔等温和和伪第一阶动力学.
- TEACCB显示出用于重金属去除水处理的实际应用的希望.
相关概念视频
00:56Extraction: Advanced Methods
398
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...
398
01:09Colloidal precipitates
470
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
470
01:09Ion-Exchange Chromatography
290
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...
290
01:17Ion Exchange
518
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...
518
01:19Masking and Demasking Agents
2.3K
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
2.3K