从废塑料中合成的石墨烯纳米板进行有效的酸盐和酸盐去除
1Department of Civil Engineering, Institute of Technology-Nirma University Ahmedabad, Ahmedabad-382481, Gujarat, India.
Journal of environmental management
|April 24, 2024
概括
废弃塑料和本托尼特粘土被转化为含有二氧化的石墨烯纳米板 (GNs),以有效地从水中去除酸盐和酸盐. 这种可持续吸附剂显示出高吸附能力和成本效益,用于净水应用.
科学领域:
- 材料科学:新型纳米材料的合成和表征.
- 环境工程:开发吸附剂,用于清除水污染物.
- 化学工程:可持续材料的过程优化和成本分析.
背景情况:
- 人们越来越担心水污染的酸盐和酸盐需要先进的去除技术.
- 塑料废弃物对环境造成重大负担,需要创新的回收和利用战略.
- 基于石墨烯的材料由于其高表面积和可调化学物质,为吸附提供了有前途的性能.
研究的目的:
- 从废塑料和托尼特粘土中合成含有二氧化的石墨烯纳米板 (GNs).
- 评估合成的GNs在从合成水中吸附酸盐和酸盐的有效性.
- 评估GNs生产过程的经济可行性,以潜在的商业化.
主要方法:
- 石墨烯纳米板 (GNs) 通过两步过程产生:在750°C下进行热解,然后进行球磨.
- 总核的特征包括拉曼光谱,FTIR,XRD,FESEM,HRTEM和EDX光谱.
- 进行了批量吸附实验,以优化参数 (pH,接触时间,剂量,初始度) 并确定吸附动力学和同热量.
主要成果:
- 在优化条件下,酸盐去除率达到85%,酸盐去除率达到91%.
- 酸盐的最大吸附能力为53 mg/g,酸盐的最大吸附能力为16.4 mg/g.
- 吸附遵循伪二次动力学和兰格穆尔异热模型,表明化学吸附.
- 生命周期成本分析 (LCCA) 估计生产成本为每公斤GNs的4.21美元,这表明商业可行性.
结论:
- 来自废塑料和本托尼特粘土的含有的石墨烯纳米板是有效的酸盐和酸盐吸附剂.
- 开发的材料和合成过程表明了可持续和经济有效的水处理解决方案的潜力.
- 这项研究强调了塑料废弃物回收成高价值环境修复材料的有希望的途径.
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