通过三元纳米吸收剂从水中去除六价:关于动力学,平衡和热力学机制的研究
Md Nashir Uddin1, Ganesh Chandra Saha1, Md Abul Hasanath2
1Department of Civil Engineering, Dhaka University of Engineering and Technology, Gazipur, Bangladesh.
PloS one
|December 22, 2023
概括
一种新的铁,和氧化物纳米复合物 (Fe2O3-MnO2-SnO2) 有效地去除六价 (Cr(VI)). 本研究详细介绍了吸附机制,动力学和热力学,证明了废水处理的高效率和可重复使用性.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 六价 (Cr(VI)) 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来去除Cr (VI) 是至关重要的.
- 三级纳米复合材料为污染物修复提供了独特的特性.
研究的目的:
- 为了合成和描述一个新的Fe2O3-MnO2-SnO2纳米复合材料.
- 为了研究Cr (VI) 的吸附机制,动力学和热力学.
- 评估吸附剂的性能和可用于废水处理的可重复使用性.
主要方法:
- 易于合成Fe2O3-MnO2-SnO2三元氧化物纳米复合材料.
- 使用FTIR,XRD,TGA,BET和SEM/EDX进行表征.
- 批量吸附实验用于研究pH值,温度,初始Cr (VI) 度和吸附剂剂量的影响.
主要成果:
- 在优化条件下,最大吸附能力为69.2毫克Cr (VI) g-1.
- 吸附遵循伪二次动力学和兰格穆尔异热模型.
- 热力学分析表明一个随机的,由主导的吸附过程.
- 吸附剂在四个吸附-脱附周期后保持了超过80%的效率.
- 从制厂的废水中提取了91.89%的Cr (VI).
结论:
- 纳米复合物Fe2O3-MnO2-SnO2是一种高度有效的吸附剂,用于去除Cr (VI).
- 吸附机制包括吸附和减少.
- 该材料的易于合成,高表面积,可重复使用性和性能使其适用于工业应用.
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