超交联废弃物聚碳酸盐,以去除废水中的重金属污染物
Hadiseh Masoumi1, Ahad Ghaemi2
1School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran.
Scientific reports
|February 27, 2024
概括
超交联废弃物聚碳酸有效地从废水中去除和离子. 这项研究详细介绍了吸附过程,发现它在最佳条件下是外热,自发和高效的.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理技术水处理技术
背景情况:
- 污染废水的重金属离子,如和,构成严重的环境和健康风险.
- 开发有效和可持续的方法来从水溶液中去除这些有毒离子对于环境保护至关重要.
- 废弃物材料,如聚碳酸,有潜力作为吸附材料的低成本前体.
研究的目的:
- 调查超交联废物聚碳酸在从废水中去除 (Pb) 和 (Cd) 离子方面的有效性.
- 用合成的吸附剂来阐明金属离子去除的吸附行为,动力学和热力学.
- 为了确定金属离子吸附的最佳条件,并了解底层的去除机制.
主要方法:
- 废弃的聚碳酸盐通过弗里德尔 - 克拉夫特反应进行过度交叉连接,以创建一种吸附材料.
- 进行了批量吸附实验,以评估初始度,接触时间,温度和pH的影响.
- 用同热,动力和热力学模型分析了吸附数据,以了解去除过程.
主要成果:
- 超交联聚碳酸盐对和离子 (超过160毫克/克) 具有很高的吸附能力,动态模型显示出很好的相关系数 (0.995-0.998).
- 弗洛伊德利希等温分析表明,树脂表面非均质化,n 常数 (2.060 对于 Cd,1.836 对于 Pb) 证实了有效的吸附.
- 热力学研究揭示了两个金属离子的外热和自发吸附过程,在60分钟,20°C,100毫克/升初始度和pH10时达到最佳去除.
结论:
- 超交联废弃物聚碳酸是一种高效的吸附剂,可以从废水中去除和离子.
- 吸附过程由复杂的机制控制,可能涉及由芳香结构中的C-O-C和C-H组促进的化学相互作用.
- 该研究强调了利用废物聚合物开发可持续和高效的水利化解决方案的潜力.
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