scholarly journals Energy Efficiency of Electro-Driven Brackish Water Desalination: Electrodialysis Significantly Outperforms Membrane Capacitive Deionization

2020 ◽  
Vol 54 (6) ◽  
pp. 3663-3677 ◽  
Author(s):  
Sohum K. Patel ◽  
Mohan Qin ◽  
W. Shane Walker ◽  
Menachem Elimelech
Keyword(s):  
Energy Efficiency ◽  
Brackish Water ◽  
Water Desalination ◽  
Capacitive Deionization

scholarly journals Integrated Capacitive Deionization and Humidification-Dehumidification System for Brackish Water Desalination

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7641
Author(s):  
Sadam-Hussain Soomro ◽  
Yusufu Abeid Chande Jande ◽  
Salman Memon ◽  
Woo-Seung Kim ◽  
Young-Deuk Kim
Keyword(s):  
Renewable Energy ◽  
Salt Concentration ◽  
Brackish Water ◽  
Waste Heat ◽  
Renewable Energy Sources ◽  
Water Desalination ◽  
Energy Sources ◽  
Capacitive Deionization ◽  
Combined System ◽  
Flow Rates

A hybrid capacitive deionization and humidification-dehumidification (CDI–HDH) desalination system is theoretically investigated for the desalination of brackish water. The CDI system works with two basic operations: adsorption and regeneration. During adsorption, water is desalted, and during the regeneration process the ions from electrodes are detached and flow out as wastewater, which is higher in salt concentration. This wastewater still contains water but cannot be treated again via the CDI unit because CDI cannot treat higher-salinity waters. The discarding of wastewater from CDI is not a good option, since every drop of water is precious. Therefore, CDI wastewater is treated using waste heat in a process that is less sensitive to high salt concentrations, such as humidification-dehumidification (HDH) desalination. Therefore, in this study, CDI wastewater was treated using the HDH system. Using the combined system (CDI–HDH), this study theoretically investigated brackish water of various salt concentrations and flow rates at the CDI inlet. A maximum distillate of 1079 L/day was achieved from the combined system and the highest recovery rate achieved was 24.90% from the HDH unit. Additionally, two renewable energy sources with novel ideas are recommended to power the CDI–HDH system.

Nanoarchitectured metal–organic framework/polypyrrole hybrids for brackish water desalination using capacitive deionization

2019 ◽  
Vol 6 (7) ◽  
pp. 1433-1437 ◽  
Author(s):  
Ziming Wang ◽  
Xingtao Xu ◽  
Jeonghun Kim ◽  
Victor Malgras ◽  
Ran Mo ◽  
...  
Keyword(s):  
Brackish Water ◽  
Metal Organic Framework ◽  
Water Desalination ◽  
Capacitive Deionization ◽  
Metal Organic ◽  
First Time ◽  
Organic Framework

Metal–organic framework/polypyrrole hybrids are synthesized and directly used in capacitive deionization for the first time.

scholarly journals Towards Electrochemical Water Desalination Techniques: A Review on Capacitive Deionization, Membrane Capacitive Deionization and Flow Capacitive Deionization

Membranes ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 96 ◽  
Author(s):  
Gbenro Folaranmi ◽  
Mikhael Bechelany ◽  
Philippe Sistat ◽  
Marc Cretin ◽  
Francois Zaviska
Keyword(s):  
Brackish Water ◽  
Research Area ◽  
Water Desalination ◽  
Ion Adsorption ◽  
Capacitive Deionization ◽  
Major Research ◽  
Modus Operandi ◽  
Solvated Ions ◽  
The 1960S ◽  
Simple Potential

Electrochemical water desalination has been a major research area since the 1960s with the development of capacitive deionization technique. For the latter, its modus operandi lies in temporary salt ion adsorption when a simple potential difference (1.0–1.4 V) of about 1.2 V is supplied to the system to temporarily create an electric field that drives the ions to their different polarized poles and subsequently desorb these solvated ions when potential is switched off. Capacitive deionization targets/extracts the solutes instead of the solvent and thus consumes less energy and is highly effective for brackish water. This paper reviews Capacitive Deionization (mechanism of operation, sustainability, optimization processes, and shortcomings) with extension to its counterparts (Membrane Capacitive Deionization and Flow Capacitive Deionization).

3D Capacitive Deionization Electrode Supported By Carbon Fiber/Felt Framework with Ordered Macropores for Brackish Water Desalination

2020 ◽  
Vol MA2020-02 (64) ◽  
pp. 3280-3280
Author(s):  
Yang Wang ◽  
Julio Lado ◽  
Cong Zhao ◽  
Enrique Garcia - Quismondo ◽  
Jesus Palma ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Brackish Water ◽  
Water Desalination ◽  
Capacitive Deionization ◽  
Carbon Fiber Felt

scholarly journals Efficient Desalination of Brackish Ground Water via a Novel Capacitive Deionization Cell Using Nanoporous Activated Carbon Cloth Electrodes

2015 ◽  
Vol 12 (2) ◽  
pp. 22 ◽  
Author(s):  
K. Laxman ◽  
M.T.Z Myint ◽  
M. Al Abri ◽  
L. Al-Gharibi ◽  
B. Al Namani ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ground Water ◽  
Brackish Water ◽  
Water Samples ◽  
Sea Water ◽  
Water Desalination ◽  
Carbon Cloth ◽  
Capacitive Deionization ◽  
Activated Carbon Cloth ◽  
Nanoporous Activated Carbon

Sea water intrusion in ground water sources has made brackish water desalination a necessity in Oman. The application of capacitive deionization (CDI) for the deionization of ground water samples from wells in Al-Musanaah Wilayat is proposed and demonstrated. A CDI cell is fabricated using nanoporous activated carbon cloth (ACC) as the electrodes and is shown to be power efficient for desalting ground water samples with total dissolved solids (TDS) of up to 4,000 mg/l. The CDI cell was able to remove up to 73% of the ionic scaling and fouling contaminants from brackish water samples. The power consumption for deionization of brackish water was estimated to be 1 kWh/m3 of desalinated water, which is much lower than the power required to process water with equivalent TDS by the reverse osmosis processes. The CDI process is elaborated, and observations and analysis of the ion adsorption characteristics and electrical properties of the capacitive cell are elucidated.  

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