Pb (II) 离子在具有变电荷的氧化化基质上吸附,其表面经过化学修饰
José G Prato1,2, Fernando Millán3, Marialy Rangel3
1Escuela de Ingeniería Química, Facultad de Ingeniería, Universidad de Los Andes, Mérida, 5101, Venezuela.
F1000Research
|April 4, 2024
概括
经过化学修饰的氧化基质有效吸附离子,比未经处理的材料有四倍的能力. 这提供了一个低成本的解决方案,用于在水处理系统中去除重金属,特别是在农村地区.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 水处理技术水处理技术
背景情况:
- 含有铁,,和的两极氧化物的可变电荷氧化材料,表现出可调的表面电荷.
- 这种电荷修改允许从水溶液中选择性吸附阴离子或阴离子物种.
- 这些特性使它们适合在水净化系统中用于重金属的保留.
研究的目的:
- 为了研究离子 (Pb(II)) 在化学修饰的氧化基质上的吸附.
- 为了评估处理与未处理的氧化石学材料 (OLM) 在去除方面的有效性.
- 了解这些材料的吸附机制和吸附能力.
主要方法:
- 基质由氧化石质材料 (OLM) 制备,挤压,干燥和烧焦.
- 吸附实验是在批量模式下进行的,使用经过处理的 (NaOH 0.1N) 和未经处理的OLM样本.
- 使用原子吸收光谱与石墨炉 (AAS-GF) 分析了的度,并使用弗罗恩德利希和兰格穆尔模型进行吸附数据.
主要成果:
- 活性基质上Pb(II) 离子的吸附接下来是L型异热体,表明了强烈的亲和力.
- 活性基质的吸附能力 (K) 大约是非活性基质 (491.54±31.97) 的四倍 (1791.73±13.06).
- 吸附过程中的质子产生证实了对二氧化物的化学吸附,与理论模型保持一致.
结论:
- 可变电荷的氧化吸附基体显示出在水处理中离子去除的巨大潜力.
- 这些材料为中小型水净化提供了具有成本效益和效率的替代方案.
- 它们的易用性和低成本使它们成为农村社区分散水处理的理想选择.
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