改性黑花生 (BPS) 生物碳吸附剂:从水中制备和吸附铜的方法 (II)
Chen Liu1, Xin Yan2, He-Xin Zhang1,2
1School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China.
Heliyon
|August 21, 2024
概括
新型改生物碳吸附剂 (BPS-MBCs) 有效地从废水中去除铜 (II). 这些可持续吸附剂具有高容量,可重复使用性和吸附机制,涉及物理和化学相互作用.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 吸附科学 吸附科学
背景情况:
- 废水被铜 (II) 等重金属污染给环境和健康带来了重大风险.
- 开发高效和可持续的吸附剂对于有效的重金属整治至关重要.
- 从废物中提取的生物炭提供了一个有前途的吸附剂开发平台,因为它的丰富性和调节性质.
研究的目的:
- 从废弃的黑花生 (BPS) 中合成和描述新的改生物碳吸收剂 (BPS-MBC).
- 为了研究BPS-MBCs从水溶液中去除铜 (II) 的吸附性能.
- 阐明吸附动力学,同热量,热力学以及控制BPS-MBCs上的铜 (II) 吸附的机制.
主要方法:
- 黑花生生物炭 (BPS) 用氨基三氧西兰修饰,以创建BPS-MBCs.
- 进行了批量吸附实验,以评估铜 (II) 去除效率.
- 用各种动力学 (例如,伪二次,粒子内部扩散) 和等温 (例如,Langmuir, Freundlich) 模型分析了吸附数据.
- 进行了热力学研究和材料表征,以了解吸附过程和机制.
主要成果:
- 改造显著增加了BPS-MBCs的特定表面积和孔隙性.
- 在BPS-MBC中,铜 (II) 的吸附能力很高,在45°C时最大吸附量约为284mg/g.
- 铜 (II) 吸附遵循伪二次动力学,最好用兰格穆尔异热模型来描述.
- 热力学分析显示了自发和内热吸附过程.
- 吸附剂在多个循环中表现出极好的可重复使用性.
结论:
- 改性生物炭吸附剂 (BPS-MBC) 是有效的,可重复使用的材料,用于从废水中去除铜 (II).
- 吸附机制涉及物理吸附,化学吸附 (包括化和离子交换) 和扩散化学吸附的组合.
- BPS-MBC显示出巨大的潜力,作为消除来自受污染水源的铜 (II) 的可持续解决方案.
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