文献类型：期刊文献

英文题名：Time-dependent analysis of polysaccharide fouling by Hermia models: Reveal the structure of fouling layer

作者：Niu, Bihui[1];Yang, Ling[1];Meng, Shujuan[1];Liang, Dawei[1];Liu, Hongju[1];Yang, Linyan[2];Shen, Liang[3];Zhao, Qian[4]

机构：[1]Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Xiamen Univ, Coll Chem & Chem Engn, Dept Chem & Biochem Engn, Xiamen 361005, Peoples R China;[4]Shandong Jianzhu Univ, Sch Municipal & Environm Engn, 1000 Fengming Rd, Jinan 250101, Peoples R China

年份：2022

卷号：302

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20223712742006);WOS:【SCI-EXPANDED(收录号:WOS:000875769300006)】；

基金：Acknowledgments This program is supported by the Beijing Natural Science Foundation (8222065) .

语种：英文

外文关键词：Hermia models; Forward and reverse processing; Fouling mechanism; Fouling layer structure

摘要：The Hermia fouling models are often applied in interpreting filtration data to reveal the fouling mechanisms. However, the application of these models is arbitrary and lacks in-depth analysis. In this study, time-dependent Hermia models with forward and reverse processing were employed for the first time to analyze the membrane fouling mechanism and fouling layer structure determined by polysaccharide in dead-end and cross-flow filtration. The applicability of Hermia classic and mass-transfer models was also investigated. Results showed that in cross-flow filtration, the Hermia classic model is more suitable for processing the filtration data with Ca2+ and the Hermia mass-transfer model is more appropriate for fitting the experiment result caused by Mg2+ owning to the differences in affinity of Ca2+ and Mg2+ to polysaccharide. Fitting results further manifested that the differences in concentration could obviously affect structure of polysaccharide fouling layer, and the introduction of Ca2+ and/or Mg2+ changed the spatial conformation and compactness of fouling layer. These results suggested that Hermia fouling models can provide insightful analysis of the fouling layer structure from micro-level to interpret the fouling mechanisms. The influence of cation concentration and type on membrane fouling can be revealed by the processing of Hermia models. In short, time-dependent forward and reverse processing of Hermia classic and mass-transfer models could preliminarily explain the membrane fouling behavior and structure of fouling layer. This work suggests that the Hermia fouling models are more useful than we thought and the time -dependent application of them could provide deep insights into fouling development.