使用低成本生物材料从水溶液中去除六价和三价的有希望的方法
Manisha Goswami1,2, Bhaswati Devi1, Emee Das1
1Environmental Chemistry Laboratory, Resource Management and Environment Section, Life Science Division, Institute of Advanced Study in Science and Technology, Guwahati, 781035, Assam, India.
Environmental monitoring and assessment
|April 20, 2024
概括
废弃的Euryale ferox Salisbury种子外层 (E.feroxSC) 有效地从水中去除离子. 这种环保吸附剂为重金属污染的补救提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 重金属污染对环境构成重大威胁,需要可持续的整治策略.
- 废弃的植物生物质为开发新型吸附剂提供了可行的,环保的资源.
- 索尔兹伯里种子外套 (E.feroxSC) 作为一种低成本吸附剂,用于去除重金属.
研究的目的:
- 评估E.feroxSC作为三价值 (Cr(III)) 和六价值 (Cr(VI)) 离子的吸附剂的有效性.
- 为了优化吸附参数,包括初始离子度,pH值,吸附剂剂量,接触时间和温度.
- 通过E.feroxSC.来研究吸附机制,动力学,异热和去除的热力学.
主要方法:
- 进行了批量吸附实验,以评估离子去除.
- 系统地研究了不同参数 (Cr度,pH,剂量,时间,温度) 对吸附效率的影响.
- 吸附数据使用伪二次动力学和Langmuir异热模型进行分析.
主要成果:
- E.feroxSC 获得了高的去除效率:在pH 6下为Cr (III) 96.5%,在pH 2下为Cr (VI) 97.7%.
- 最大生物吸收容量为Cr3的18.33 mg/g和Cr6的13.64 mg/g.
- 吸附跟随伪二次动力学和兰格穆尔等温,表明有利的热力学和物理吸附.
结论:
- E.feroxSC是一种高效,环保,经济高效的吸附剂,用于从水溶液中去除.
- 吸附剂表现出良好的可重复使用性,Cr(VI) 吸附的E.feroxSC在基本溶液中复原,Cr(III在酸性溶液中复原.
- 重新利用E.feroxSC有助于可持续的环境整治和废物利用.
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