在污泥双调节过程中对EPS和无机/有机花剂进行分子动态建模
Sainan Peng1, Zhiyue Wang2, Linyu Li3
1Faculty Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, Hubei, China.
The Science of the total environment
|October 14, 2023
概括
了解分子层面的调节剂-细胞外聚合物物 (EPS) 相互作用,可以改善废水污泥的排水. 聚化 (PAC) 和聚二甲基二氨基化 (PDDA) 通过改变EPS水分来减少结合水,从而提高脱水效率.
科学领域:
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
- 生物化学 生物化学
背景情况:
- 细胞外聚合物物质 (EPS) 极大地影响废水污泥的脱水能力.
- 目前的污泥调节优化受阻于缺乏对调节器-EPS相互作用的分子层次理解.
研究的目的:
- 通过使用双重调节,阐明分子层面的污泥脱水机制.
- 为了研究与EPS的普遍无机 (多化 - PAC) 和有机 (多二甲基二氨酸 - PDDA) 调节剂之间的相互作用.
主要方法:
- 组合分子动力学 (MD) 模拟,脱水性评估和EPS表征.
- 使用PAC和PDDA的双重调节来分析它们对EPS和水相互作用的影响.
主要成果:
- 通过静电相互作用,PAC和PDDA促进生物聚合物的聚合,减少水的结合.
- 调节剂吸附降低了EPS极性,改变了水分子构造,释放了结合的水并提高了脱水能力.
- 在破坏水-EPS键方面,PAC比PDDA更有效;双重调节增强了EPS强度和疏水性.
结论:
- 提供了关于污泥凝固处理的分子层面见解.
- 该研究为优化污泥调节过程和开发新型调节剂提供了理论参考.
- PAC调节使污泥结合的水减少了73.16%,显著改善了脱水能力.
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