电离型烯胺基共聚合物/聚合物水凝用于回收正负重金属离子
Kentaro Fujimoto1, Brian Adala Omondi2,3, Shinya Kawano2,3
1Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University, Fukuoka, Japan.
PloS one
|March 1, 2024
概括
这项研究开发了一种新型的水凝吸附剂,能够同时捕获重金属和离子. 优化单体比率是有效分离和回收工业废水的关键.
科学领域:
- 聚合物化学 聚合物化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 工业废水通常含有重金属阳离子和阴离子的混合物,这给环境带来了重大挑战.
- 现有的吸附剂通常向阳离子或阳离子,需要复杂的多步处理过程.
- 开发一种用于同时捕获两种污染物类型的单一吸附剂对于高效的废水整治是非常理想的.
研究的目的:
- 设计和评估一种新型的聚合物凝吸附剂,用于同时捕获重金属阳离子和阴离子.
- 为了研究共单体比率 (p-styrenesulfonate和N,N-dimethylaminopropyl acrylamide) 对吸附行为的影响.
- 在不同的条件下探索水凝的吸附和脱附特性.
主要方法:
- 合成基于烯胺 (AAm) 的聚合物水凝,与p-styrenesulfonate (SS) 和N,N-dimethylaminopropyl acrylamide (DMAPAA) 接种.
- 在各种pH值和度下使用工业相关的离子 (Ni2+,Cu2+,Zn2+,Cr2O72-) 进行吸附和脱附实验.
- 分析内部水凝pH值和膨胀能力对吸附效率的影响.
- 使用缩的NaOH和HNO3溶液优化脱.
主要成果:
- 水凝吸附剂证明了有效捕获阳离子和阳离子.
- 阴离子吸附受到更高的SS比例的青,而离子吸附增加了更高的DMAPAA含量.
- 由于对抗作用,SS和DMAPAA的相等比例减少了吸附.
- 吸附能力与水凝膨胀能力正相关.
- 通过使用缩的NaOH,然后用HNO3.3实现了完全的脱吸和分离.
结论:
- 合成的聚合物水凝是一种有前途的吸附剂,可以同时去除重金属阴离子和阴离子.
- 在合成过程中微调SS/DMAPAA比率对于优化基于污染物配置的吸附效率至关重要.
- 该研究强调了开发高效工业废水处理和资源回收的先进材料的潜力.
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