Ni (II) 和Pb (II) 使用细菌纤维素膜进行去除
Francisco de Borja Ojembarrena1, Sergio García1, Noemi Merayo2
1Department of Chemical Engineering and Materials, University Complutense of Madrid, Avda. Complutense s/n, 28040 Madrid, Spain.
Polymers
|September 28, 2023
概括
细菌纤维素 (BC) 膜通过吸附有效地从废水中去除Ni (II) 和Pb (II). 该研究详细介绍了BC合成,表征和金属离子去除的最佳条件,突出了其在净化水中的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 生物技术是生物技术.
背景情况:
- 细菌纤维素 (BC) 是一种高度结晶的纳米材料,具有丰富的活性组.
- 污染废水的重金属如Ni (II) 和Pb (II) 构成严重的环境风险.
研究的目的:
- 为了合成和表征细菌纤维素 (BC) 膜.
- 通过吸附来研究BC膜对Ni (II) 和Pb (II) 从废水中去除的应用.
- 为了确定最佳的条件和吸附机制来去除重金属.
主要方法:
- 通过发酵合成和特征的BC膜.
- 在不同的条件下进行的吸附实验 (pH,剂量).
- 使用伪二阶和Sips模型分析的吸附动力学和同热量.
- 使用粒子内部扩散模型和TEM成像研究的金属去除机制.
主要成果:
- 长达四天的BC膜表现出3D纳米纤维网络,pH值6.3和高的阴离子需求.
- 伪二次动力学和Sips异热模型准确地描述了Ni (II) 和Pb (II) 吸附.
- 在pH 4下以400 mg·L-1BC剂量达到最佳的去除.
- 最大吸附能力:Ni (II) 的28.18 mg·g-1和Pb (II) 的8.49 mg·g-1 .
- 的吸附是外热的 (物理吸附),而Pb的吸附是内热的.
结论:
- BC膜是有效的吸附剂,可以从废水中去除Ni (II) 和Pb (II).
- 对于Ni(II) (结晶) 和Pb(II) (吸附过程),吸附机制是不同的.
- 该研究证明了BC在开发可持续水处理技术方面的潜力.
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