Kim, Sukyoung Shim, Jaegyu Son, Moon Park, Sanghun Cho, Kyung Hwa 2024-01-19T08:03:32Z 2024-01-19T08:03:32Z 2023-11-17 2023-12 0011-9164 https://pubs.kist.re.kr/handle/201004/113055 A rechargeable seawater battery desalination (SWB-D) system stores energy in a battery cell while removing salts from saline water via a sodium superionic conductor membrane and an anion exchange membrane. However, the electrochemical performance often degrades owing to the organic fouling generated on the ion exchange membranes. In this study, we investigated the fouling behavior of the SWB-D system by individually dissolving three different types of organic matter-humic acid, sodium alginate, and bovine-serum-albumin. In terms of the salt-removal performance of the SWB-D system, gradual degradation was observed over three charging cycles using hydrophobic humic acid (-13 %) and bovine-serum-albumin (-18 %), whereas no degradation was caused by hydrophilic sodium alginate. Continuous water flow mitigated the fouling behavior, and a large volume of saline water enabled longer charging. The increase in the electrical resistance of the SWB-D system was measured in the presence of organic matter using electrochemical impedance spectroscopy and the four-electrode method. Additionally, the presence of fouling layer was identified using field-emission scanningelectron microscopy, energy-dispersive X-ray spectroscopy, and Fourier-transform infrared spectrometry. In conclusion, the results demonstrated that the hydrophobic organic matter in the feed water could be unfavorable when operating the SWB-D system. English Elsevier BV Influence of organic matter on seawater battery desalination performance Article 10.1016/j.desal.2023.117024 1 Desalination, v.568 Desalination 568 N scie scopus 001091057200001 2-s2.0-85173283258 Engineering, Chemical Water Resources Engineering Water Resources Article CAPACITIVE DEIONIZATION REVERSE-OSMOSIS HUMIC-ACID FOULING BEHAVIOR MEMBRANE WATER COAGULATION ALGINATE IMPACT Desalination Fouling Ceramic membrane Organic matter Seawater battery