通过曼尼赫反应从水溶液中去除Pb (II) 和Cu (II) 的新型奇托/素基凝
Xiuxian Zhao1, Heng Zhao2, Anna Mei3
1School of Materials Science and Engineering, University of Jinan, Jinan 250022, PR China.
International journal of biological macromolecules
|November 30, 2024
概括
合成了一种新型的酸盐/酸水凝 (CSL),以有效地去除重金属. 这种绿色吸附剂显示出超快的吸附率和高和铜的容量,为净化水提供了可持续的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 基于生物质的吸附剂对重金属的去除有希望.
- 目前通过溶解干燥制备的酸盐/酸吸附剂的性能有限.
- 需要改进的吸附剂,提高效率和选择性.
研究的目的:
- 使用简单的单曼尼赫反应,开发一种新型的奇托/酸水凝 (CSL) 吸附剂.
- 评估CSL对各种重金属的吸附性能,重点关注Pb (II) 和Cu (II).
- 研究吸附机制并评估开发的水凝的工业潜力.
主要方法:
- 采用单的曼尼赫反应来合成基托/酸水凝 (CSL).
- 进行了吸附实验,以确定重金属的选择性,吸附率和吸附能力.
- 福里埃变换红外光谱学 (FT-IR) 和X射线光电子光谱学 (XPS) 用于阐明吸附机制.
主要成果:
- 合成的CSL水凝对比其他重金属对Pb (II) 和Cu (II) 具有很高的选择性.
- 最佳的CSL1水凝表现出超快的吸附,在Pb (II) 的1分钟内达到平衡,在Cu (II) 的2分钟内达到平衡.
- CSL1的最大吸附能力为Pb (II) 的139.86 mg·g−1和Cu (II) 的98.71 mg·g−1.
结论:
- 新的CSL水凝提供了一种简单的制备方法,优越的吸附能力和快速的吸附动力学.
- 在CSL上,Pb (II) 和Cu (II) 的主要吸附机制是化学复合.
- 这项研究提出了一个有希望的,可持续的吸收剂,用于有效的重金属整治工业废水.
相关概念视频
00:56Extraction: Advanced Methods
420
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...
420
01:14Acid Halides to Ketones: Gilman Reagent
2.7K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
2.7K
01:17Precipitation and Co-precipitation
1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K