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微量重金属通过有机化合物的吸附,通过使用异热吸附和动力模型丰富生物炭

Fiza Pir Dad¹, Waqas-Ud-Din Khan², Faiza Sharif¹

¹Sustainable Development Study Centre, Government College University, Lahore, 54000, Pakistan.

Environmental research

|November 19, 2023

概括

有机化合物丰富的米生物炭有效地从水中去除铜和等微量重金属. 与简单的生物炭相比,这种增强的生物炭显著提高了去除效率,为水资源整治提供了可持续的解决方案.

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:

微量重金属 (例如铜,) 当存在于高水平时,对生态系统构成重大风险.
米生物炭是一种潜在的吸附剂,但通过与有机化合物进行丰富,可以提高其有效性.
了解吸附机制和动力学对于优化重金属去除过程至关重要.

研究的目的:

研究有机化合物丰富的米生物炭 (OCEB) 对于从水溶液中去除微量重金属的有效性.
描述生物炭吸附剂的物理和化学特性.
评估主要重金属 (Cr,Cu,Ni,Pb) 的吸附动力学和同热量.

主要方法:

使用扫描电子显微镜 (SEM) 和富里埃变换红外光谱 (FTIR) 进行生物炭的表征.
使用用甘氨酸丰富生物炭 (GBC) 和用氨酸丰富生物炭 (ABC) 进行重金属 (Cr, Cu, Ni, Pb) 的吸附实验.
使用伪第一和二阶模型的动力学研究以及使用兰格穆尔模型的异热分析.

主要成果:

兰迈尔异温表示在吸附剂上对Ni和Cu进行单层吸附.
与简单的米生物炭 (SBC) 相比,GBC去除Cu的最大吸附能力 (qmax) 增加了90%.
伪二阶动力学最好地描述了Ni和Cu的化学吸附过程,与SBC相比,GBC对Cu和Ni的去除效率分别高出21%和30%.

结论:

与简单的米生物炭 (SBC) 相比,用有机化合物丰富的米生物炭 (GBC,ABC) 在固定微量重金属方面表现出优异的性能.
和的吸附机制涉及化学相互作用,最好用伪二阶动力学来描述.
OCEB为重金属污染水的整治提供了一个有前途且高效的吸附剂.

关键词:

吸附方式是异热的.生物炭是一种生物炭.环境管理环境管理甘氨酸 (Glycine) 是一种动态建模动态建模有机化合物有机化合物

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