Tang Publishes on Membrane Capacitive Deionization

Posted on 11/14/2019 9:30:49 AM

Hao Tang’s paper, “Modeling and Interpretation of Membrane Capacitive Deionization Responses to Different Salt Load,” was accepted for publication in AWWA Water Science.

Zhu, S.; Yu, J.; Stewart, T.C.; Tang, H.L. Modeling and Interpretation of Membrane Capacitive Deionization Responses to Different Salt Load. AWWA Water Science. DOI: 10.1002/aws2.1166. (Accepted)

Membrane Capacitive Deionization


Capacitive deionization (CDI) is a promising technology for energy-efficient water desalination. The introduction of membranes to the CDI confounds the process of characterization. As far as the Non-Faradaic effects are concerned, the membranes affect the ion kinetics, i.e., the mobility difference of ions during the transportation from the bulk solution via the membrane and macropores into the micropores. This makes Membrane CDI (MCDI) a complicated dynamical nonlinear process. Although different models have been developed describing the CDI performance under the impacts of various design and operating parameters, it is unclear whether the models previously developed for regular CDI still hold for MCDI. Since MCDI outperforms CDI regarding salt removal efficiency, the ability of a model for predicting its performance under different salt load would be desirable. In Dr. Tang’s research, an MCDI system was assembled to investigate the electrosorption and desorption processes under the influence of two parameters: initial salt concentration and flow rate. The data collected from the experiments was used to generate a model to predict electrosorption and desorption of salt in MCDI. Utilization of the model for prediction of MCDI performance under the influences of initial salt concentration and flow rate was analyzed and interpreted. The study is beneficial for industrial applications regarding provision of strategies for engineering design of MCDI and selection of operating conditions for optimum water desalination performance.

The first author, Siyu Zhu, was a former graduate student of Hunan University. He was an advisee of Professor Tang when the work was done. IUP former undergraduate Ty Stewart was a co-author of the paper.

Department of Chemistry