通过含有氧的功能组增强Pb2+的吸附,丰富了活性碳
Ning Xie1,2, Haiming Wang3,4, Changfu You1,2
1Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China.
Environmental science and pollution research international
|April 15, 2024
概括
用酸或过氧化修改的子基活性炭显示出从水中去除有毒 (Pb2+) 的增强能力. 这种具有成本效益的方法通过提高吸附效率来改善水净化.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- (Pb2+) 是一种具有严重毒性风险的重要水污染物.
- 有效和经济的除方法对于公共卫生至关重要.
- 基于子的活性炭 (AC) 是一种潜在的吸附材料.
研究的目的:
- 为了提高 (Pb2+) 清除子基活性炭 (AC) 的能力.
- 通过使用酸 (HNO3) 或过氧化 (H2O2) 引入含氧功能组 (OFG) 来修改AC.
- 评估修改AC的吸附性能和机制,以去除.
主要方法:
- 用酸 (HNO3) 和过氧化 (H2O2) 来修改以子为基础的AC.
- 修改AC的表征,以评估OFG含量和纹理性质的变化.
- 批量吸附实验以确定Pb2+的吸附能力和动力学.
主要成果:
- 氧化处理有效增加了OFG含量,但没有显著改变AC的纹理特性.
- 用10M HNO3修改的AC显示Pb2+吸附能力比原始AC高4.26倍.
- 用30%重量的H2O2修改的交流电表现出3.64倍高的Pb2+吸附能力.
- 吸附数据与兰木尔异温和埃洛维奇运动模型相匹配,表明单层和化学吸附.
结论:
- 基于子的水热辅助HNO3/H2O2修改AC显示了有效地从水溶液中去除Pb2+的巨大潜力.
- 修改策略有效地提高了吸附能力,同时保持了物理吸附特性.
- 这种方法提供了一种可持续的解决方案,用于回收和可再生子的废弃物.
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