Influential Mechanism of Natural Organic Matters with Calcium Ion on the Anion Exchange Membrane Fouling Behavior via xDLVO Theory
Zhun Ma,
Lu Zhang,
Ying Liu,
Xiaosheng Ji,
Yuting Xu,
Qun Wang,
Yongchao Sun,
Xiaomeng Wang,
Jian Wang,
Jianliang Xue,
Xueli Gao
Affiliations
Zhun Ma
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Lu Zhang
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Ying Liu
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Xiaosheng Ji
Sanya Institute of Oceanology, Chinese Academy of Sciences, Sanya 572000, China
Yuting Xu
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Qun Wang
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Yongchao Sun
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Xiaomeng Wang
College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Jian Wang
The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources (MNR), Tianjin 300192, China
Jianliang Xue
College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Xueli Gao
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
The fouling mechanism of the anion exchange membrane (AEM) induced by natural organic matter (NOM) in the absence and presence of calcium ions was systematically investigated via the extended Derjaguin–Landau–Verwey–Overbeek (xDLVO) approach. Sodium alginate (SA), humic acid (HA), and bovine serum albumin (BSA) were utilized as model NOM fractions. The results indicated that the presence of calcium ions tremendously aggravated the NOM fouling on the anion exchange membrane because of Ca-NOM complex formation. Furthermore, analysis of the interaction energy between the membrane surface and foulants via xDLVO revealed that short-range acid–base (AB) interaction energy played a significant role in the compositions of interaction energy during the electrodialysis (ED) process. The influence of NOM fractions in the presence of calcium ions on membrane fouling followed the order: SA > BSA > HA. This study demonstrated that the interaction energy was a dominating indicator for evaluating the tendency of anion exchange membranes fouling by natural organic matter.
