一种磁性分子印制聚合物吸附剂的简单合成,用于从水中提取二二的固体相提取
Heba Ali Dakhly1, Salwa A H Albohy2, Aida A Salman2
1Faculty of Oral and Dental Medicine, Future University in Egypt (FUE) New Cairo Egypt ahmed.abdelmawgood@fue.edu.eg ahmed_said5899@yahoo.com.
RSC advances
|May 17, 2024
概括
一种新的磁吸附剂有效地从工业废水中去除二二. 这种分子印记聚合物为净水和环境保护提供了有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 由各种污染物造成的水污染对人类健康和生态系统构成重大全球风险.
- 吸附式水处理为减轻水污染提供了一个可行的策略.
- 迪克洛菲纳克是一种抗炎药物,是工业废水中常见的制药污染物.
研究的目的:
- 开发和描述磁性分子印记聚合物 (MMIP) 用于去除二二.
- 评估从工业废水中获得的二二的MMIP的吸附性能和机制.
- 研究合成纳米材料的物理和化学特性.
主要方法:
- 使用分子印制的聚氨酸和磁石纳米粒子合成磁性吸附剂 (MMIP).
- 使用包括DLS,泽塔潜力,VSM,XRD和SEM在内的技术来描述MMIP.
- 固相提取实验以确定吸附能力,动力学和最佳条件 (pH,度,时间).
主要成果:
- 该MMIP的颗粒大小为86.3纳米,其高吸附能力为139.7毫克g-1的迪克洛菲纳克.
- 在pH值范围为3至7的范围内,在200分钟后,达到了最优的狄克洛菲纳克去除.
- 吸附动力学遵循伪秒序模型,表明一种由力驱动的过程可能涉及键和范德瓦尔斯力.
结论:
- 开发的磁性吸附剂 (MMIP) 对从工业废水中固体相提取二二非常有效.
- 由于其高效的吸附能力和磁性特性,MMIP在水处理中显示出实际应用的潜力.
- 了解吸附机制为设计用于污染物去除的先进材料提供了洞察力.
相关概念视频
03:11Precipitation of Ions
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
01:09Colloidal precipitates
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...
01:17Precipitation and Co-precipitation
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...
01:06Coagulation
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
00:56Extraction: 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 formed in...
00:49Gravimetry: Inorganic And Organic Precipitating Agents
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...