同步构建层次性的多孔通道和基表面电荷在基凝上,以快速去除
Siying Wang1, Yili Wang1, Shuoxun Dong2
1College of Environmental Science and Engineering, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing, 100083, China.
Environmental research
|July 27, 2023
概括
一种新型的复合水凝有效地从废水中去除,使吸附剂有效回收利用. 这种双功能材料具有很高的吸附能力和快速脱落,这对于环境保护和资源回收至关重要.
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 处理水的方法
背景情况:
- 从废水中去除对于防止肥胖和使资源恢复至关重要.
- 开发具有高吸附能力和高效脱吸能力的吸附剂对于可持续的水处理至关重要.
- 现有的吸附剂在平衡吸附和脱吸性能方面经常面临挑战,这限制了它们的可回收性.
研究的目的:
- 为了合成一种新的多孔磁性La(OH) 3加载的MAPTAC/奇托 (CTS) /聚乙烯胺 (PEI) 三元复合水凝 (p-MTCH-La(OH) 3).
- 增强双功能吸附部位,以提高 (P) 吸附和脱附性能.
- 调查用于P去除的复合水凝的吸附机制和可回收性.
主要方法:
- 同时溶解预嵌入的CaCO3和CTS粉末,以创建分层的多孔通道.
- 在多孔结构上植入PEI和加载La(OH) 3以创建增强的双功能吸附点.
- 复合水凝结构的特征,吸附能力,脱吸效率和吸附动力学.
主要成果:
- 在中性条件下,p-MTCH-La(OH) 3水凝具有高的P吸附能力,为107.23±4.96毫克P/g.
- 复合物表现出快速吸附动力学 (速率常数为0.1 g mg-1 h-1),并且在存在竞争性离子时保持有效性.
- 机械学研究显示,内球复合和晶体转化是主要的P去除途径,静电相互作用促进了脱吸 (92.8%的脱吸得到).
结论:
- 合成的p-MTCH-La(OH) 3水凝有效地从废水中去除.
- 双功能吸附点和多孔结构有助于高吸附能力和高效的脱吸,促进吸附剂回收利用.
- 这项研究提出了一个有前途的吸收剂,用于水处理中的可持续管理.
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