可持续的粉微纤维素复合水凝可有效地从水中去除重金属
Talles B da Costa1, Paulo H Camani2, Rafaela R Ferreira1
1Center for Engineering, Modeling, and Applied Social Sciences, Federal University of ABC (UFABC), dos Estados Avenue, 09280-560 Santo André, Brazil.
International journal of biological macromolecules
|May 30, 2025
概括
由玉米粉和微纤维化纤维素 (MFC) 制成的可持续水凝有效地从水中去除铜离子. 这些可生物降解材料为水资源整治提供了低成本的解决方案,具有高吸附能力和可重复使用性.
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:
- 水中的重金属污染对环境和健康构成重大风险.
- 开发可持续和高效的吸附剂对于有效的水资源整治至关重要.
- 玉米粉和微纤维化纤维素 (MFC) 是丰富的,可生物降解的资源,具有吸附剂开发的潜力.
研究的目的:
- 从玉米粉和MFC开发和表征可持续的复合水凝,用于去除铜离子.
- 调查MFC含量对水凝特性和吸附性能的影响.
- 阐明吸附机制,并评估开发的水凝的可重复使用性.
主要方法:
- 复合水凝是使用玉米粉和树粉的MFC合成的.
- 分析了水凝的特性,例如溶解度,密度和表面积.
- 进行了批量吸附实验,以评估铜 (Cu2+) 去除效率和能力.
- 吸附等温,动力学和热力学模型被应用来理解吸附过程.
- 进行了溶解和再利用研究,以评估水凝的可回收性.
主要成果:
- 将MFC纳入粉矩阵会降低溶解度和增加密度,在MFC含量较高时会降低表面积.
- 水凝对Cu2+的亲和力比其他测试的金属离子更强.
- 粉/MFC-5%水凝达到最大的Cu2+去除效率为52.4%和吸附能力为0.258 mmol/g.
- 兰木尔等温和和伪二阶动力学最好地描述了吸附过程,表明向化学吸附转移.
- 液凝显示有效的去除,并可重复使用长达四个吸附/脱附周期.
结论:
- 粉/MFC复合水凝是有效的,低成本的,可生物降解的材料,用于从水环境中去除铜离子.
- 加入MFC显著提高了用于重金属修复的基于粉的水凝的性能.
- 这些发现凸显了利用农业副产品开发可持续水处理解决方案的潜力.
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