氨基酸酸盐复合材料对Sb选择性吸附的协同效应:实验和密度功能理论研究
Lan Yang1, Pingshu Wang1, Xin Sun1
1Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
Gels (Basel, Switzerland)
|December 24, 2025
概括
本研究引入聚乙烯胺 (PEI) /藻酸盐 (ALG) 来有效地从水中去除反 (Sb). 这种新型吸附剂具有高容量,可重复使用性和选择性Sb (III) 吸附性,为工业废水处理提供了一个有前途的解决方案.
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:
- 工业和农业活动造成的反 (Sb) 污染对生态构成重大风险.
- 从污染水中去除Sb (III) 的有效方法对于环境保护至关重要.
研究的目的:
- 开发和评估一种新的吸附材料,以有效地去除Sb (III).
- 研究吸附剂的吸附能力,可重复使用性和选择性.
- 为了阐明Sb的吸附机制 (III) 在修饰的酸盐上.
主要方法:
- 用聚乙烯胺 (PEI) 修改藻酸盐 (ALG),以产生PEI/ALG.
- 吸附实验以确定Sb (III) 的去除效率和能力.
- 在多个吸附-脱附周期的重复使用性测试.
- 密度函数理论 (DFT) 计算以探索绑定相互作用.
- 特性分析以了解吸附机制.
主要成果:
- PEI/ALG表现出高的Sb (III) 吸附能力 (实际:743 mg/g).
- 吸附剂在八个重复使用周期后保持了90-98%的去除效率.
- 在特定的pH条件下,吸附对Sb(III) 是有选择性的,常见离子的干扰最小.
- DFT计算证实了PEI/ALG功能组 (-OH, -COOH, -NH2, -NH-, -N=) 和Sb (III) 之间的强有力的结合相互作用.
- 观察到来自Sb (III) 沉,酸离子和某些与pH值较高的酸/金属化物共存的干扰.
结论:
- PEI/ALG是一种高效且可重复使用的吸附剂,用于Sb (III) 的去除.
- 主要吸附机制涉及PEI/ALG功能组和Sb之间的H键和协调.
- 这项研究突出了PEI/ALG在废水处理中选择性反整治的潜力,尽管需要进一步优化溶解.
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