利用聚乙烯胺在修改基托表面的力量,以获得高效的离子染料和六价去除
Jisuan Tan1, Lingzhen Kong2, Qiaoxian Huang2
1Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin 541004, China; Guangxi Key Laboratory of Green Chemical Materials and Safety Technology, Beibu Gulf University, Qinzhou 515000, China.
Environmental research
|January 15, 2024
概括
富含氨基酸的奇托 (ARCH) 有效地从水中去除离子染料和六价. 这种具有成本效益的材料具有很高的吸附能力和稳定性,使其成为水处理的有希望的材料.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 废水被阳离子染料和重金属污染造成了严重的环境和健康风险.
- 开发高效,具有成本效益的吸附剂对于可持续的水处理至关重要.
- 基托是一种生物聚合物,具有改造为先进吸附材料的潜力.
研究的目的:
- 通过聚乙烯胺基修饰酸盐,合成和表征富含氨基酸的酸盐 (ARCH).
- 评估ARCH从水溶液中去除阳离子染料和六价的吸附性能.
- 为了研究ARCH的吸附机制,热力学和可重复使用性.
主要方法:
- 基托与聚乙烯胺的表面功能化,以创建ARCH.
- 描述ARCH的表面积,孔隙结构和泽塔潜力.
- 批量吸附实验,以确定埃里格劳二盐,甲基,黄,塔特拉和六价的吸附能力 (Qe).
- 吸附动力学,异热模拟 (伪二次,兰木尔) 和热力学研究.
- 在多个吸附-脱附周期中评估ARCH稳定性和可重复使用性.
主要成果:
- ARCH的特异性表面积高 (8.35 m2 g-1),并且具有微孔的结构.
- ARCH 显示出了极好的吸附能力:1301.15 毫克 g-1 (EDS),1025.45 毫克 g-1 (MO),940.72 毫克 g-1 (ART),732.96 毫克 g-1 (TTZ) 和350.15 毫克 g-1 (Cr(VI)).
- 在10分钟内迅速达到吸附平衡,遵循伪二阶和朗穆尔模型.
- 这个过程是自发的,内热的,并且受到温度升高的支持.
- 在5个循环后,ARCH保持了大约60%的初始吸附能力,这表明其稳定性和可重复使用性良好.
结论:
- 由于其有利的表面特性和强的正电荷,ARCH是离子染料和六价的高效吸附剂.
- 吸附过程是快速的,自发的,并且通过已建立的动力和异热模型得到了很好的描述.
- ARCH表现出有希望的稳定性,可重复使用性和成本效益,将其定位为先进水处理应用的可行材料.
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