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使用ZnBr2·4H2O为染料吸收剂,轻松制造纤维素素酸盐复合气凝
Lian-Jie Zhao1, Jia-Ran Li1, Yu Li1
1Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, China.
International journal of biological macromolecules
|November 23, 2025
概括
研究人员从玉米茎和奇托中开发了新的纤维纤维素气凝 (LAs) 和复合气凝 (LCAs),以有效处理废水. 这种LCA材料的高刚果红色吸附能力为641.5mg/g,证明了它在去除染料方面的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 开发具有成本效益和高性能吸附剂对于废水处理至关重要.
- 纤维素材料为吸附剂开发提供了一个可持续的来源.
- 奇托的氨基群可以增强吸附性质.
研究的目的:
- 使用玉米茎和奇托制备和表征纤维素气凝 (LAs) 和纤维素-奇托复合气凝 (LCAs).
- 为了评估这些气凝的吸附性能,用于从废水中去除染料.
- 调查处理时间和酸盐添加对气凝结构和效率的影响.
主要方法:
- 用ZnBr2·4H2O处理玉米茎和奇托,形成气凝.
- 合成了红纤维素气凝 (LA) 和复合气凝 (LCA).
- 对刚果红的吸附能力使用动态和异热模型进行测量和分析.
主要成果:
- 基纤维素气凝 (LA15) 呈现出3D多孔结构,最佳的刚果红色吸附能力为489.4 mg/g.
- 复合气凝 (LCA10) 显示,刚果红色的最大吸附能力显著提高至641.5mg/g,增加了31%.
- 吸附遵循伪二阶动力学和兰迈尔模型,表明化学吸附以表面相互作用为主.
结论:
- 玉米茎和奇托桑可以有效地结合起来,制造出高性能气凝吸附剂.
- 开发的LCA材料显示了在废水处理中高效,低成本的染料去除的绝佳潜力.
- 这种方法提供了一个简单的方法,在温和的条件下生产有效的染料吸收剂.
相关概念视频
03:11Precipitation of Ions
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The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.