石墨烯和铜氧化物改性纳米复合物的动力和平衡研究,用于从二元金属水溶液中吸附金属离子
Alaa H Ali1, Asmaa Bahjat Kareem2, Usama A Al-Rawi2
1Water and Environmental Directorate, Ministry of Higher Education and Scientific Research, Baghdad, Iraq.
Frontiers in chemistry
|November 30, 2023
概括
石墨烯氧化物/铜氧化物纳米复合材料有效地从水中去除有毒的和离子. 这些先进的材料在批量和连续系统中都显示出高的去除率,为废水处理提供了一个有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 重金属离子,特别是 (Ni2+) 和 (Cd2+),对环境和健康构成重大风险,污染自然水资源.
- 石墨烯氧化物 (GO) 纳米复合材料与金属氧化物纳米粒子 (NP) 对于从废水中去除重金属离子越来越重要.
研究的目的:
- 为了合成和描述与氧化铜纳米复合材料 (GO/CuO-NCs) 堆叠的石墨烯氧化物.
- 评估GO/CuO-NCs在批量和连续流体实验中从二元金属离子系统中去除Ni2+和Cd2+离子的效率.
主要方法:
- 合成的GO/CuO-NCs. 的合成.
- 使用FTIR,XRD,SEM,EDX和AFM进行表征.
- 批量和连续吸附实验用于Ni2+和Cd2+的去除.
- 吸附动力学和异热学研究.
主要成果:
- 在批量研究中,GO/CuO-NCs表现出高的去除效率:Ni2+的89.60%±2.12%,Cd2+的97.10%±1.91%.
- 最佳批量条件包括pH8,0.25g剂量,60分钟接触时间和50ppm初始度.
- 最佳的连续流量条件包括4毫升/分钟的流量,50 ppm的初始度和2厘米的床高度.
- 吸附遵循伪二次动力学,最适合兰格穆尔异热模型.
结论:
- GO/CuO纳米复合材料是从二元金属离子系统中去除Ni2+和Cd2+离子的高效吸附剂.
- 这些发现表明GO/CuO-NCs作为废水处理中的重金属整治可持续解决方案的潜力.
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