Correlation equation for evaluating energy consumption and process performance of brackish water desalination by electrodialysis

Wang, Li; Patel, Sohum K.; Elimelech, Menachem

doi:10.1016/j.desal.2021.115089

Cited by 10 publications

(2 citation statements)

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“…The most important advantage underlies the cost-effectiveness and higher output reliability when integrated with renewable powered systems as a sustainable hybrid desalination technology . In ED, the ion-exchange membrane (IEM) is a crucial component that decides the desalination performance …”

Section: Introductionmentioning

confidence: 99%

“…4 In ED, the ionexchange membrane (IEM) is a crucial component that decides the desalination performance. 5 IEMs are semipermeable barriers with a well-defined hydrophilic−hydrophobic nanophase morphology. 7 This class of material has versatile applicability ranging from electromembrane processes (electrodialysis, membrane capacitive deionization) to electrochemical energy devices (both storage and production), to separation and purification technologies (diffusion dialysis, oil−water separation, dye separations, pathogen removal, etc.).…”

Section: Introduction "mentioning

confidence: 99%

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Solution-Phase Intercalation of 2D Hybrid SGO in Sulfonated Poly(2,6-dimethyl-1,4-phenylene oxide): Improved Electrochemical Properties and Electrodialytic Desalination Performance

Mishra

Sharma

Rathod

et al. 2022

ACS Appl. Energy Mater.

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This work investigates a strategy to overcome conventional trade-offs of long-range ionic conductivity in pristine sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (SPPO-S) via solution-phase intercalation of synthesized hybrid sulfonated graphene oxide (hSGO) in an SPPO-S matrix. The hSGO nanocomposite was prepared via covalent functionalization of GO through facile silyl-oxy bond formation using 3-mercaptopropyl trimethoxy silane (MPTMS). A series of nanocomposite membranes (ShGO) with low (0.1, 0.2, 0.5, 0.8 wt %) to high (1.0, 2.0, 5.0 wt %) hSGO concentrations were fabricated, and the influence of hSGO on physicochemical and electromembrane transport properties was evaluated. XPS and ζ-potential measurements illustrated that the hydrophilic hSGO with a spacer-type trimethylene sulfonic acid [(−CH2)3–SO3H] moiety establishes a dynamic interaction via means of intermolecular H-bonding and short-range electrostatic interactions, respectively. With 0.5 wt % hSGO, the membranes showed excellent physicochemical attributes (i.e., IEC = 1.24 mequiv g–1 and WU = ∼44%) with improved ionic conductivity by ∼43% (i.e., κm = 1.92 × 10–2 S cm–1) in contrast to pristine SPPO-S (i.e., IEC = 0.98 mequiv g–1; WU = 37.12%; κm = 1.34 × 10–2 S cm–1). Chemical structures and phases were confirmed using NMR, FT-IR, XRD, XPS, etc. The i–V characteristics illustrated that the high I lim 1 of nanocomposite membranes alleviated the ion percolation and influenced the operational potential to a broader range for lower power consumptions (PCs) and higher current efficiencies (CEs). ShGO-0.5 showed PC as low as 1.04 kWh kg–1 and CE as high as ∼88% during electrodialytic brackish water desalination. In summary, the prepared membranes may be promising candidates for electrodialytic brackish water desalination with a high salt removal (≥93%) efficiency.

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Section: Introductionmentioning

confidence: 99%