可持续利用Fe3O4修饰的活性煤,用于水性酸盐的去除和ANN建模
Hasara Samaraweera1, Abdul Zahir2, Shah Saud Alam3
1Department of Chemistry, Mississippi State University, Mississippi State, MS, USA; Department of Civil and Environmental Engineering, Western University, ON, N6H0B6, Canada.
Environmental research
|July 15, 2024
概括
活性煤上的磁纳米颗粒显著增强了水中的酸盐去除,提供了一个高效和可持续的解决方案. 这种新型材料对环境修复和资源回收应用具有前景.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 岩是一种丰富且具有成本效益的资源,具有可持续应用的潜力.
- 酸盐污染是一个重要的环境问题,需要有效的去除方法.
- 开发用于水资源整治的先进材料符合资源效率目标.
研究的目的:
- 为了研究铁氧化物磁性纳米粒子 (Fe3O4) 在活性煤 (A-L) 上进行酸盐去除的有效性.
- 描述酸盐对Fe3O4-A-L复合物的吸附机制,动力学和异温.
- 评估这种磁性复合材料在实际环境应用和资源回收方面的潜力.
主要方法:
- 在KOH激活红 (Fe3O4-A-L) 上支持Fe3O4纳米颗粒的合成.
- 在各种pH,时间和度条件下进行酸盐吸附实验.
- 使用动力模型 (伪二次),异热模型 (弗朗德利希) 和表面分析技术 (XPS) 的分析.
- 人工神经网络 (ANN) 建模用于预测和灵敏度分析.
主要成果:
- 与原始的A-L (8.5 mg/g) 相比,Fe3O4-A-L的酸盐去除能力增加了8倍 (67.6 mg/g).
- 酸盐的去除是快速的,发生在2小时内,并遵循伪二次动力学.
- 吸附机制涉及化学吸附和沉,弗洛伊德利希异热提供了更好的适应.
- 在预测酸盐去除方面,ANN建模显示了高准确度 (R2 = 0.99),其中温度和初始度是关键因素.
结论:
- 磁性Fe3O4-A-L是一种高效的吸附剂,用于可持续的酸盐去除和回收.
- 这种材料具有诸如易于回收,快速吸收和直接再生等优点.
- 这种复合物为环境修复和肥料生产的潜在用途提供了一个有希望的,具有成本效益的解决方案.
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