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离子强度和pH对重金属在水溶液中的聚氨酸共聚合物的吸附的影响
Angela Marineau1, Uliana Karpukhina1, Ruth Agyemang1
1Department of Chemistry, Trent University, 1600 W. Bank Dr, Peterborough, Ontario K9L0G2, Canada.
ACS applied materials & interfaces
|February 15, 2024
概括
聚氨酸 (PANI) 和其共聚合物在水中检测离子 (Ba2+) 具有很高的灵敏度和选择性. 像pH和离子强度这样的环境因素并没有显著改变它们的传感性能.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 聚氨 (PANI) 是一种导电聚合物,在化学传感中具有潜在的应用.
- 提高PANI对重金属检测的敏感性和选择性对于环境监测至关重要.
- PANI的共聚物提供可调节的特性,以提高传感能力.
研究的目的:
- 合成和评估PANI和两个共聚合物,聚乙烯-co-o-toluidine (PoTOL-50) 和聚乙烯-co-o-anisidine (PoANI-50),作为重金属的感应材料.
- 评估这些聚合物对特定重金属离子 (Ba2+,Cd2+,Cu2+,Ni2+) 和常见干扰物 (Ca2+,Mg2+) 的敏感性和选择性.
- 调查溶液pH值和离子强度对传感性能的影响.
主要方法:
- 在1:1的输入比率下合成聚氨酸 (PANI),聚氨酸-co-o-toluidine (PoTOL-50) 和聚氨酸-co-o-anisidine (PoANI-50).
- 使用重金属离子 (Ba2 +,Cd2 +,Cu2 +,Ni2 +) 和矩阵干扰物 (Ca2 +,Mg2 +) 在10和40ppm度下评估聚合物的灵敏性和选择性.
- 系统地改变水溶液pH值和离子强度,以确定它们对聚合物传感性能的影响.
主要成果:
- 这三种合成的聚合物都对离子 (Ba2+) 具有很高的敏感性和选择性.
- 聚合物证明了目标重金属和常见干扰离子之间的有效区分.
- 在改变测试溶液的pH值或离子强度时,没有观察到敏感性或选择性的显著变化.
结论:
- 潘尼及其合成的共聚合物 (PoTOL-50,PoANI-50) 是选择性和敏感地检测水性环境中的Ba2+的有希望的材料.
- 这些聚合物在不同的pH值和离子强度条件下强大的性能提高了它们在水质监测中的实际应用.
- 进一步的研究可以探索这些增强的聚氨基基传感器对更广泛的环境污染物的应用.
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