相关实验视频

Updated: Sep 18, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

通过重金属化处理处理水的四化-EDTA交联纤维素水凝

Manjot K Grewal¹, Ayodele Fatona², Yue Su¹

¹Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, Ontario L8S 4M1, Canada.

ACS applied materials & interfaces

|June 27, 2025

概括

研究人员从纤维素中开发出环保的水凝吸附剂,以从水中去除有毒的重金属. 这些可生物降解材料为净化水,减少污染和保护环境健康提供了具有成本效益的解决方案.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
聚合物化学聚合物化学

背景情况:

重金属污染是一个重要的环境和健康问题,特别是在发展中国家.
传统的吸附剂往往会带来一些挑战,例如不高效的去除和二次污染.
需要可持续,经济有效和可生物降解的材料用于重金属整治.

研究的目的:

开发可再生,可生物降解和具有成本效益的水凝吸附剂,用于重金属的去除.
研究基于纤维素的水凝在从水中捕获各种重金属离子中的有效性.

主要方法:

乙烯纤维素 (HEC) 和甲基纤维素 (CMC) 的功能化与芳香性化物 (aa-HEC,aa-CMC).
功能化的纤维素与基于乙烯基二胺四酸 (EDTA) 的交叉链接剂 (4h-EDTA) 的交叉链接.
为最大凝储存模量 (G') 优化化物与化物比率,并描述吸附能力.

主要成果:

一种25/75 aa-HEC/aa-CMC的水凝组合与4h-EDTA交叉连接在1:2的化物到化物比率显示出最佳的性能.
优化的水凝显示了200Pa的储存模量 (G') 和102mgCu2+/g的高吸附能力.
在测试的金属离子 (Cu2+,Ni2+,Zn2+,Co2+,Mg2) 中,水凝对Cu2+的亲和力最高.

结论:

基于纤维素的水凝是有效和可持续的吸附剂,用于去除重金属.
这些材料为传统的净水方法提供了一个有希望的绿色替代方案.
开发的水凝解决了对重金属污染的有效,可生物降解和经济解决方案的需求.

关键词:

生物可再生能源生物可再生能源碳甲基纤维素的碳甲基纤维素.酸盐的交叉链接酸盐的交叉链接基乙基纤维素的基乙基纤维素.机械性能机械性能机械性能吸附同热量和运动学水的整治水的整治.

更多相关视频

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Published on: June 28, 2019

Author Spotlight: Advancing Therapeutics with Biocompatible Sodium Alginate Hydrogel Microspheres

Author Spotlight: Advancing Therapeutics with Biocompatible Sodium Alginate Hydrogel Microspheres

Published on: June 7, 2024

相关概念视频

EDTA: Chemistry and Properties

EDTA: Chemistry and Properties

Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...

EDTA: Auxiliary Complexing Reagents

EDTA: Auxiliary Complexing Reagents

EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...

Masking and Demasking Agents

Masking and Demasking Agents

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...

Extraction: Advanced Methods

Extraction: Advanced Methods

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...

Complexation Equilibria: The Chelate Effect

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...

Complexometric Titration: Ligands

Complexometric Titration: Ligands

Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...