从水中有效吸附 (Se ((IV) 和Se ((VI)) 使用Acacia senegal多种氨基组的多糖:合成和应用
Lingzhen Kong1, Xingtang Liang1, Yanjun Zhan1
1Guangxi Key Laboratory of Green Chemical Materials and Safety Technology, Beibu Gulf University, Qinzhou 515000, China; College of Petroleum and Chemical Engineering, Beibu Gulf University, Qinzhou 515000, China.
International journal of biological macromolecules
|October 16, 2023
概括
一种富含氨酸的凝 (ARAS),来自塞内加尔,有效地从水中去除 (Se). 这种具有成本效益的吸附剂表现出高吸附能力和稳定性,显示出水处理应用的巨大潜力.
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:
- 水中的污染对环境和健康构成重大风险.
- 开发高效,具有成本效益的吸附剂对于去除至关重要.
- 阿卡西亚塞内加尔是一种天然聚合物,具有化学修饰的潜力.
研究的目的:
- 为了合成和表征来自塞内加尔木的富含胺基的凝 (ARAS),用于吸附.
- 评估ARAS对Se (IV) 和Se (VI) 的吸附性能和稳定性.
- 研究ARAS的吸附机制和热力学特性.
主要方法:
- 在Acacia senegal的化学修饰中,制造出一种富含氨酸的凝 (ARAS).
- 描述ARAS,包括特定的表面积和功能组.
- 批量吸附实验以确定Se(IV) 和Se(VI) 的吸附能力,去除效率和动力学.
- 朗穆尔和近二阶模型被用来阐明吸附机制.
- 在各种条件下 (pH,盐度,溶剂) 进行了热力学研究和稳定性测试.
主要成果:
- 亚拉斯的最大吸附能力为75毫克g-1的Se(IV) 和130毫克g-1的Se(VI).
- 在低度下,可以实现高清除效率 (高达98.6%).
- 在60分钟内达到吸附平衡,遵循近二次动力学和兰木尔异热模型.
- 在广泛的pH范围 (4-11) 和盐度 (0-1M NaCl) 中,ARAS表现出极好的稳定性.
- 吸附剂在三个吸附-脱附周期后保持了其容量的60%左右.
结论:
- 亚拉斯是一种高效和稳定的吸附剂,可以从水溶液中去除Se (IV) 和Se (VI).
- 静电吸引和键的协同效应有助于其增强的吸附能力.
- 在水处理中,ARAS为修复提供了一种具有成本效益和前景的解决方案.
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