可分离的硫酸改性生物炭凝珠,用于有效地从废水中去除
Ai Wu1, Ruiyi Sun1, Dafeng Zhang2
1Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650504, China.
International journal of biological macromolecules
|August 10, 2023
概括
一种新的复合凝珠,Ca-BC@PEI-SA,有效地从废水中去除离子. 这种具有成本效益的材料在多个循环中表现出高吸附能力和稳定性,为净化水提供了有前途的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理技术水处理技术
背景情况:
- 废水中的 (Cd) 污染对环境和健康构成重大风险.
- 开发高效和成本效益的吸附剂对于重金属的去除至关重要.
- 基于生物炭的复合材料具有增强吸附性能的潜力.
研究的目的:
- 为了合成和表征一种新的复合材料,Ca-BC@PEI-SA凝珠,用于离子吸附.
- 研究Ca-BC@PEI-SA的吸附性能和机制,用于从水溶液中去除Cd.
- 评估合成吸附材料的可重复使用性和稳定性.
主要方法:
- 合成硫酸改性生物炭 (Ca-BC) 与聚乙烯胺 (PEI) 和藻酸盐 (SA) 交叉连接成凝珠.
- 批量吸附实验以确定pH,接触时间,温度和共存离子的影响.
- 吸附等温度 (Langmuir, Freundlich) 和动力学 (伪第一阶,伪第二阶) 的分析.
- 使用光谱和化学相互作用分析对Cd (II) 吸附机制的研究.
主要成果:
- 这种Ca-BC@PEI-SA凝珠表现出极好的Cd (II) 吸附性能.
- 吸附能力随着温度的增加而增加,在35°C时达到165.56mg/g的最大值.
- 吸附遵循兰格穆尔模型和伪二阶动力学,表明化学吸附.
- 吸附剂表现出良好的机械强度,易于回收,并在四个周期内保持高容量.
- 关键的吸附机制包括表面复杂化,离子交换和阴离子-π 结合.
结论:
- Ca-BC@PEI-SA凝珠是一种高效,稳定和可重复使用的吸附剂,用于从废水中去除.
- 该材料的成本效益和高效性能使其成为实际水处理应用的有希望的候选者.
- 了解吸附机制为设计用于重金属修复的先进材料提供了洞察力.
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