Abstract
ABSTRACT A novel asymmetric capacitive deionisation (CDI) device was home-made for the removal of cations from an aqueous solution through the structural innovation in this experiment. The adsorbent materials were characterised by Scanning Electron Microscope and BET as well as performing cyclic voltammetry curve tests. The results showed that the materials exhibited excellent performance (the specific surface area is 321.14 m²/g) and the maximum specific capacitance of the adsorbent material can reach 60 F/g at the 5 mV/s. The optimal operating conditions of the asymmetric CDI device were obtained using an orthogonal test method analysis and response surface methodology: the best desalination efficiency of CDI obtained at the concentration is 455.82 mg/L, the potential is 1.18 V and the flow rate is 46.54 mL/min. After the analysis of first-order kinetic model, it can be obtained that the fastest adsorption efficiency for Ca2+, followed by Mg2+, and the slowest for Na+, and the CDI device had a better adsorption effect on divalent cations. Simulation by Comsol software showed that the adsorption efficiency was better at a high flow rate. In addition, the CDI device has good stability and the mechanism of targeted cation removal and mass transfer process of the CDI were discussed in detail.
Full Text
Topics from this Paper
Capacitive Deionisation
Cation Removal
Asymmetric Device
Response Surface
High Flow Rate
+ Show 5 more
Create a personalized feed of these topics
Get StartedTalk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Similar Papers
May 7, 2021
Biomass Conversion and Biorefinery
Jun 27, 2019
Water Research
Mar 1, 2019
Desalination
Oct 1, 2022
Water Research
Feb 1, 2022
Journal of Cleaner Production
Feb 1, 2018
Chemical Engineering Journal
Feb 1, 2021
Electrochimica Acta
Sep 1, 2013
EnergyChem
Sep 1, 2020
Electrochemical Society Meeting Abstracts
Jul 23, 2018
Environmental Technology
Environmental Technology
Nov 27, 2023
Environmental Technology
Nov 23, 2023
Environmental Technology
Nov 23, 2023
Environmental Technology
Nov 23, 2023
Environmental Technology
Nov 20, 2023
Environmental Technology
Nov 17, 2023
Environmental Technology
Nov 17, 2023
Environmental Technology
Nov 17, 2023
Environmental Technology
Nov 16, 2023
Environmental Technology
Nov 16, 2023