Hybrid technologies: The future of energy efficient desalination – A review

Ahmed, Farah Ejaz; Hashaikeh, Raed; Hilal, Nidal

doi:10.1016/j.desal.2020.114659

Cited by 137 publications

(73 citation statements)

References 244 publications

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“…They allow the separation of streams of the ions, the joint presence of which in the concentrate can cause precipitation. Solving this problem revived interest in electrodialysis as an effective method for concentrating reverse osmosis retentates [ 14 ], deactivating mine and waste water [ 11 , 15 ], producing high-quality drinking water, water for irrigated agriculture [ 16 ], recovery of phosphates from municipal wastewater, livestock liquid effluent and landfills for the production of cheap fertilizers [ 17 ] as part of combined baro-electromembrane technologies. AEMs, which are selective to singly charged anions (systems Cl - /SO 4 2− , for example) [ 18 , 19 ] and are capable of resisting fouling, are essential for this purpose [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Transport Characteristics of CJMAED™ Homogeneous Anion Exchange Membranes in Sodium Chloride and Sodium Sulfate Solutions

Сарапулова

Pismenskaya

Titorova

et al. 2021

IJMS

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The interplay between the ion exchange capacity, water content and concentration dependences of conductivity, diffusion permeability, and counterion transport numbers (counterion permselectivity) of CJMA-3, CJMA-6 and CJMA-7 (Hefei Chemjoy Polymer Materials Co. Ltd., China) anion-exchange membranes (AEMs) is analyzed using the application of the microheterogeneous model to experimental data. The structure–properties relationship for these membranes is examined when they are bathed by NaCl and Na2SO4 solutions. These results are compared with the characteristics of the well-studied homogenous Neosepta AMX (ASTOM Corporation, Japan) and heterogeneous AMH-PES (Mega a.s., Czech Republic) anion-exchange membranes. It is found that the CJMA-6 membrane has the highest counterion permselectivity (chlorides, sulfates) among the CJMAED series membranes, very close to that of the AMX membrane. The CJMA-3 membrane has the transport characteristics close to the AMH-PES membrane. The CJMA-7 membrane has the lowest exchange capacity and the highest volume fraction of the intergel spaces filled with an equilibrium electroneutral solution. These properties predetermine the lowest counterion transport number in CJMA-7 among other investigated AEMs, which nevertheless does not fall below 0.87 even in 1.0 eq L−1 solutions of NaCl or Na2SO4. One of the reasons for the decrease in the permselectivity of CJMAED membranes is the extended macropores, which are localized at the ion-exchange material/reinforcing cloth boundaries. In relatively concentrated solutions, the electric current prefers to pass through these well-conductive but nonselective macropores rather than the highly selective but low-conductive elements of the gel phase. It is shown that the counterion permselectivity of the CJMA-7 membrane can be significantly improved by coating its surface with a dense homogeneous ion-exchange film.

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Section: Introductionmentioning

confidence: 99%

Transport Characteristics of CJMAED™ Homogeneous Anion Exchange Membranes in Sodium Chloride and Sodium Sulfate Solutions

Сарапулова

Pismenskaya

Titorova

et al. 2021

IJMS

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“…On another hand, novel membrane material synthesis, module design and processing approaches have been broadly explored, rendering the membranes chlorine-resistant, antifouling, stable, and highly efficient in terms of desalination and separation performance. Interested readers are referred to the excellent research and review articles [ 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ]. In a recent work by ISDMU and Shandong University of Science and Technology, aminophenyl-modified mesoporous silica NPs were used to fabricate RO membranes, enabling enhanced water flux by 21% while maintaining high NaCl rejection of 98.97%, only slightly decreased by 0.29% compared with that of the pristine membrane [ 47 ].…”

Section: The Main Technical Progressmentioning

confidence: 99%

Progress and Perspectives of Desalination in China

Ruan

Wang

et al. 2021

Membranes

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In recent decades, the ever-growing demands for clean water in households and industries have urged researchers to take every possible step to deal with the global water crisis. Seawater desalination has turned out to be the most promising and efficient way to provide clean water. Owing to the advancement of synthetic chemistries and technologies, great success has been achieved in the desalination and utilization of seawater worldwide. China, with the world’s largest population, has pushed the development of desalination and multipurpose utilization of seawater further in respect of materials, technologies and services, etc. This review reports recent progress of desalination technologies accomplished in China, from the viewpoints of facilities and equipment, collaborations, technologies, applications, research abilities, services, and standard systems. Inspired by the Fourteenth Five-year Plan, it also proposes future perspectives of desalination in China.

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“…25 Other hybrid desalination processes usually constituted thermal/RO systems, combining the benets of high separation efficiency of multistage ash (MSF) and low energy consumption of RO. 26 The MSF desalination process is mainly based on the ash evaporation principle, where seawater is heated until boiling while exposing to reduced pressure. Generally, the ashing chamber receives the heated seawater by low pressure steam up to 90-120 C. It starts to boil and evaporate with the effect of ashing.…”

Section: Hybrid Desalination Technologies and Processesmentioning

confidence: 99%