氨基碳酸纤维素用于Cd2+和Pb2的吸附
Jin Gou1, Wen Zhang2, Xiao-Feng Wang2
1College of Petrochemical Engineering, Liaoning Petrochemical University, Fushun, 113001, China.
Chemosphere
|August 3, 2023
概括
一种新型的氨基碳素纤维素有效吸附和等重金属. 这种材料具有很高的吸附能力和可重复使用性,为从水中去除重金属提供了一个有希望的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 聚合物化学 聚合物化学
背景情况:
- 重金属污染对环境和健康构成重大风险.
- 基于纤维素的材料提供潜在的吸附剂,由于它们的丰富性和可调性.
- 开发有效的吸附剂,用于有毒金属离子,如 (Cd2+) 和 (Pb2+) 是至关重要的.
研究的目的:
- 为重金属吸附合成和表征氨基碳酸纤维素.
- 为了研究合成材料对Cd2+和Pb2+的吸附性能.
- 评估吸附剂的吸附机制,热力学和可重复使用性.
主要方法:
- 通过希夫基反应将甘氨酸移植到 aldehyde 纤维素上,以产生氨基碳素纤维素.
- 批量吸附实验以确定最佳pH值,平衡时间和吸附能力.
- 使用兰迈尔和伪二阶模型进行分析,以阐明吸附动力学和异热量.
- 在多个循环中进行热力学研究和可重复使用性测试.
主要成果:
- 氨基碳酸纤维素表现出高吸附能力:Cd2+ (85.7 mg g-1) 和Pb2+ (115.1 mg g-1) 在30°C时.
- 最佳吸附发生在Cd2+的pH为4.5-5.0和Pb2+的pH为4.0-5.5时.
- 在30分钟内达到吸附平衡,遵循朗格穆尔和伪二阶动力学,表明化学吸收.
- 这个过程是自发的和内热的,吸附剂在4个循环后显示出很高的可重复使用性.
结论:
- 氨基碳素纤维素是一种高效的和离子吸附剂.
- 该材料表现出优异的吸附能力,快速平衡,以及良好的可重复使用性.
- 这种合成的纤维素衍生物为重金属修复提供了一个可行的和可持续的选择.
关键词:
吸附方式 吸附方式 吸附方式Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd 在线播放 在线播放 在线播放 在线播放接种的纤维素素.Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb Pb
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