具有高吸收能力的染料,通过对pH值有反应的甲基酸盐/二硫酸盐/碳基化奇托/聚乙烯胺吸收剂吸收
Hui Wang1, Kun Dai2, Houle Xiang1
1College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China.
International journal of biological macromolecules
|August 24, 2024
概括
一种新的磁纳米粒子吸附剂有效地从废水中去除阳离子和阴离子染料. 这种响应pH的材料显示出高容量,优良的可重复使用性,以及对染料吸附应用的有希望的未来.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 染料废水带来了重大的环境和健康风险.
- 有效的吸附剂对于处理工业废水至关重要.
研究的目的:
- 为了合成和表征一种新的磁吸附剂 (SA/SL/CCS/PEI@MNPs) 用于去除染料.
- 为了研究阳离子和阴离子染料的吸附性能和机制.
- 评估吸附剂的可重复使用性和实际应用的潜力.
主要方法:
- 一合成的磁性纳米粒子 (MNPs) 修改了与酸 (SA),二硫酸 (SL),碳氧化奇托 (CCS),和聚乙烯胺 (PEI).
- 吸附剂的特性,包括孔径大小和pH响应.
- 在不同的pH条件下进行吸附实验,以确定阴离子和阴离子染料的容量.
- 使用FTIR,XPS,分子动力学模拟和辐射分布函数分析吸附机制.
- 在多个循环中评估吸附剂的可重复使用性.
主要成果:
- 合成的SA/SL/CCS/PEI@MNPs吸附剂呈现出中孔状结构,孔径为34.92nm.
- 在酸性条件下实现了高吸附能力: >550 mg/g的阳离子染料 (tartrazine,反应性黑-5,红色卡明) 在酸性条件下, >1900 mg/g的阴离子染料 (甲蓝,甲紫,中性红) 在性条件下.
- 吸附剂表现出很好的可重复使用性,在五个循环后保持超过90%的去除效率.
- 吸附机制被确定为静电吸引和π-π相互作用,由SL,CCS和PEI的功能组促进.
结论:
- SA/SL/CCS/PEI@MNPs吸附剂是一种高效且对pH值有反应的材料,用于去除各种有机染料.
- 修改组件的协同效应提高了吸附能力和选择性.
- 吸附剂的可重复使用性和强大的性能表明了工业废水处理的巨大潜力.
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