Extraction and Adsorption Properties of Extracellular Polymeric Substance

被引：1
|
作者：
Xu X.-H. [1 ]
Wei D.-Z. [1 ]
Zhang L.-H. [1 ]
机构：
[1] School of Resources & Civil Engineering, Northeastern University, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2021年 / 42卷 / 10期
关键词：
Activated sludge; Adsorption; Extracellular polymeric substances(EPS); Extraction method; Mn[!sup]2+[!/sup;
D O I：
10.12068/j.issn.1005-3026.2021.10.014
中图分类号：
学科分类号：
摘要：
In order to quickly and efficiently extract extracellular polymeric substances(EPS)from activated sludge, four methods were used to extract tightly bound EPS(TB-EPS). The advantages and disadvantages of different extraction methods were compared, the effect of TB-EPS on the adsorption performance of Mn2+was investigated, and the adsorption mechanism of TB-EPS was studied. The results show that the heating method is simple and efficient with no damage to cell structure.When adsorbing heavy metal Mn2+, the maximum adsorption rate of TB-EPS extracted by heating method is 53.8%. The adsorption process conforms to the second-order reaction kinetic characteristics and the Langmuir adsorption isotherm equation, which is mainly the chemical adsorption. The main adsorption mechanism of TB-EPS is the interaction of hydrophobic tryptophan and tyrosin. © 2021, Editorial Department of Journal of Northeastern University. All right reserved.
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页码：1467 / 1474
页数：7
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