离子液体交联高吸收聚合物水凝:膨胀和染料吸附的动力学
Palash Banerjee1, Priyanka Dinda1, Mahuya Kar1
1School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India.
Langmuir : the ACS journal of surfaces and colloids
|July 3, 2023
概括
用离子液体交叉连接器合成化学交叉连接的化水凝,以有效地从废水中去除有机染料. 这些新型水凝吸附剂显示出高容量,良好的可回收性,以及工业废水处理应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 聚合物化学 聚合物化学
背景情况:
- 废水处理需要有效的方法来去除有毒有机污染物.
- 聚合物凝由于其可调节性质,具有作为吸附剂的潜力.
- 开发具有高效率和可回收性的新型吸附剂至关重要.
研究的目的:
- 为了合成和表征化学交联的阴阳性水凝吸附剂.
- 为了研究这些水凝对有机染料的吸附性能.
- 评估水凝吸附剂的再生和回收潜力.
主要方法:
- 离子液体交叉连接剂 ([VIm-4VBC][Cl]和[DMAEMA-4VBC][Cl]) 的合成.
- 自由基聚合以制备交联聚烯胺 (CPAam) 和聚二乙基甲酸盐 (CPHEMA) 水凝.
- 紫外线光谱法用于确定染料吸收能力和动力学/异热学研究.
主要成果:
- 合成的水凝表现出巨孔形态和高热稳定性.
- 水凝显示出高胀行为,遵循伪Fickian动力学.
- 阳离子染料的吸附能力超过100毫克g-1 (Eosin B的Langmuir模型).
- 吸附遵循伪二次动力学,易于再生和超过80%的循环效率在三个周期.
结论:
- 开发的基于离子液体的交联水凝是废水中有机染料的有效吸附剂.
- 水凝具有有利的吸附特性和出色的可重复使用性.
- 这些发现凸显了这些新型水凝在实际废水处理应用中的潜力.
相关概念视频
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Capillary action is a result of water’s adhesive tendencies. When a narrow glass...
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Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...
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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...


