使用硫酸铜-氨复合物修改活性碳从废水中有效地去除:吸附性能和机制
Yifei Wang1,2, Xiaoxiao Yan1, Yidi Zhang1
1School of Civil & Environmental Engineering and Geography Science, Ningbo University, Ningbo 315211, China.
Molecules (Basel, Switzerland)
|May 25, 2024
概括
研究人员用硫酸铜-氨复合物修改了活性炭,以改善废水中的去除. 修改后的材料[Cu ((NH3) 4) -PAC,显示提高吸附能力和在废水处理中的有效性.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- 废水中的 (Ni) 污染对环境和健康构成重大风险.
- 有效地去除对于净水和环境保护至关重要.
- 活性炭是一种常见的吸附剂,但其效率可以提高.
研究的目的:
- 开发一种改性活性炭,提高吸附能力.
- 研究改性活性炭的生理化学特性和吸附机制.
- 评估废水处理准备技术的成本效益.
主要方法:
- 使用硫酸铜-氨复合物 ([Cu(NH3) 4) SO4·H2O) 来修改基于Phragmites australis的活性炭.
- 使用表面积分析,元素组成和博姆定位,对活性炭 (PAC) 和改性活性炭 ([Cu(NH3) 4) -PAC) 的表征.
- 批量吸附实验以评估Ni (II) 度,接触时间,pH和离子强度的影响.
- 使用富里埃变换红外光谱 (FTIR) 和X射线光电子光谱 (XPS) 阐明吸附机制.
主要成果:
- 与未经修改的PAC相比,改性活性炭 ([Cu(NH3) 4) -PAC) 显示出增强的Ni(II) 吸附能力.
- 修改增加了表面的相对氧和含量.
- 吸附遵循兰格穆尔模型和伪二阶动力学.
- 尼去除效率随着离子强度的增加而下降;[Cu(NH3) 4) -PAC表现出pH缓冲.
结论:
- 铜硫酸盐-氨复合物的修饰有效地提高了活性炭的吸附能力.
- 改性活性炭为废水中尼克尔的去除提供了一种经济高效的解决方案.
- 该研究阐明了吸附机制,包括表面复杂化,阴离子交换和静电相互作用.
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