Advancing ion-exchange membranes to ion-selective membranes: principles, status, and opportunities DOI Creative Commons
Hanqing Fan, Yuxuan Huang, Ngai Yin Yip

и другие.

Frontiers of Environmental Science & Engineering, Год журнала: 2022, Номер 17(2)

Опубликована: Окт. 31, 2022

Abstract Ion-exchange membranes (IEMs) are utilized in numerous established, emergent, and emerging applications for water, energy, the environment. This article reviews five different types of IEM selectivity, namely charge, valence, specific ion, ion/solvent, ion/uncharged solute selectivities. Technological pathways to advance selectivities through sorption migration mechanisms transport critically analyzed. Because underlying principles governing transport, efforts enhance selectivity by tuning membrane structural chemical properties almost always accompanied a concomitant decline permeability desired ion. Suppressing undesired crossover solvent neutral species is crucial realize practical implementation several technologies, including bioelectrochemical systems, hypersaline electrodialysis desalination, fuel cells, redox flow batteries, but ion/solvent relatively understudied, compared ion/ion Deepening fundamental understanding phenomena, specifically factors underpinning structure-property-performance relationships, will be vital guide informed development more selective IEMs. Innovations material design offer opportunities utilize ion discrimination that radically from conventional IEMs potentially depart putative permeability-selectivity tradeoff. Advancements can contribute meeting aqueous separation needs environmental challenges.

Язык: Английский

Tailored design of nanofiltration membranes for water treatment based on synthesis–property–performance relationships DOI
Kunpeng Wang, Xiaomao Wang,

Brielle Januszewski

и другие.

Chemical Society Reviews, Год журнала: 2021, Номер 51(2), С. 672 - 719

Опубликована: Дек. 21, 2021

This review article is devoted to bridging the conventional and newly-developed NF membranes with potential environmental applications by systematically discussing synthesis–property–performance relationships.

Язык: Английский

Процитировано

371
Salt and Water Transport in Reverse Osmosis Membranes: Beyond the Solution-Diffusion Model DOI Creative Commons
Li Wang, Tianchi Cao, J.E. Dykstra

и другие.

Environmental Science & Technology, Год журнала: 2021, Номер 55(24), С. 16665 - 16675

Опубликована: Дек. 8, 2021

Understanding the salt–water separation mechanisms of reverse osmosis (RO) membranes is critical for further development and optimization RO technology. The solution-diffusion (SD) model widely used to describe water salt transport in RO, but it does not intricate molecules ions through membrane. In this study, we develop an ion referred as solution-friction model, by rigorously considering partitioning interactions among water, ions, Ion membrane described extended Nernst–Planck equation, with consideration frictions between species (i.e., ion, matrix). Water flow governed hydraulic pressure gradient friction matrix well ions. validated using experimental measurements rejection permeate flux a lab-scale, cross-flow setup. We then investigate effects feed concentration on permeability, demonstrating strong dependence permeability applied pressure, starkly disparate from SD model. Lastly, framework analyze drop distribution across membrane, that cross-membrane dominates overall marked contrast assumes no

Язык: Английский

Процитировано

171
Separation, anti-fouling, and chlorine resistance of the polyamide reverse osmosis membrane: From mechanisms to mitigation strategies DOI
Chao Liu, Wenjing Wang, Bo Yang

и другие.

Water Research, Год журнала: 2021, Номер 195, С. 116976 - 116976

Опубликована: Фев. 25, 2021

Язык: Английский

Процитировано

154
Rejection Mechanism of Ionic Solute Removal by Nanofiltration Membranes: An Overview DOI Creative Commons
Nur Syahirah Suhalim, Norherdawati Kasim, Ebrahim Mahmoudi

и другие.

Nanomaterials, Год журнала: 2022, Номер 12(3), С. 437 - 437

Опубликована: Янв. 27, 2022

The toxicity of heavy metals can cause water pollution and has harmful effects on human health the environment. Various methods are used to overcome this pressing issue each method its own advantages disadvantages. Membrane filtration technology such as nanofiltration (NF) produces high quality a very small footprint, which results in lower energy usage. Nanofiltration is membrane-based separation technique based reverse osmosis process developed 1980s. NF membranes have pore size 1 nm molecular weight cut off (MWCO) 300 500 Da. properties unique since surface charge dependent functional groups membrane. rejection mechanism membrane it combination various mechanisms steric hindrance, electric exclusion, dielectric effect, hydration mechanism. However, these not been studied in-depth due their complexity. There also many factors contributing Many junior researchers would face difficulty studying Therefore, paper designed for new field, will briefly review by both sieving non-sieving processes. This mini-review aims provide with general understanding concept charged membranes.

Язык: Английский

Процитировано

136
Revolutionizing Membrane Design Using Machine Learning-Bayesian Optimization DOI
Haiping Gao, Shifa Zhong,

Wenlong Zhang

и другие.

Environmental Science & Technology, Год журнала: 2021, Номер 56(4), С. 2572 - 2581

Опубликована: Дек. 30, 2021

Polymeric membrane design is a multidimensional process involving selection of materials and optimization fabrication conditions from an infinite candidate space. It impossible to explore the entire space by trial-and-error experimentation. Here, we present strategy utilizing machine learning-based Bayesian precisely identify optimal combinations unexplored monomers their We developed ML models accurately predict water permeability salt rejection monomer types (represented Morgan fingerprint) conditions. applied on built model inversely sets monomer/fabrication condition with potential break upper bound for water/salt selectivity permeability. fabricated eight membranes under identified found that they exceeded bound. Our findings demonstrate ML-based represents paradigm shift next-generation separation design.

Язык: Английский

Процитировано

115
A comprehensive review of recent advances in nanofiltration membranes for heavy metal removal from wastewater DOI Open Access
Zahra Samavati, Alireza Samavati, Pei Sean Goh

и другие.

Process Safety and Environmental Protection, Год журнала: 2022, Номер 189, С. 530 - 571

Опубликована: Дек. 1, 2022

Язык: Английский

Процитировано

94
Lithium Concentration from Salt-Lake Brine by Donnan-Enhanced Nanofiltration DOI
Zi Hao Foo, Danyal Rehman, Andrew T. Bouma

и другие.

Environmental Science & Technology, Год журнала: 2023, Номер 57(15), С. 6320 - 6330

Опубликована: Апрель 7, 2023

Membranes offer a scalable and cost-effective approach to ion separations for lithium recovery. In the case of salt-lake brines, however, high feed salinity low pH post-treated have an uncertain impact on nanofiltration's selectivity. Here, we adopt experimental computational approaches analyze effect elucidate key selectivity mechanisms. Our data set comprises over 750 original rejection measurements, spanning five salinities two levels, collected using brine solutions that model three compositions. results demonstrate Li+/Mg2+ polyamide membranes can be enhanced by 13 times with acid-pretreated solutions. This enhancement is attributed amplified Donnan potential from ionization carboxyl amino moieties under solution pH. As increase 10 250 g L–1, decreases ∼43%, consequence weakening exclusion Further, our analysis accentuates importance measuring separation factors representative compositions replicate ion-transport behaviors brine. Consequently, reveal predictions improved up 80% when appropriate Cl–/SO42– molar ratios are used.

Язык: Английский

Процитировано

86
Performance metrics for nanofiltration-based selective separation for resource extraction and recovery DOI
Ruoyu Wang, Rong‐Rong He,

Tao He

и другие.

Nature Water, Год журнала: 2023, Номер 1(3), С. 291 - 300

Опубликована: Март 9, 2023

Язык: Английский

Процитировано

77
Sustainable Lithium Recovery from Hypersaline Salt-Lakes by Selective Electrodialysis: Transport and Thermodynamics DOI
Zi Hao Foo, John B. Thomas,

Samuel M. Heath

и другие.

Environmental Science & Technology, Год журнала: 2023, Номер 57(39), С. 14747 - 14759

Опубликована: Сен. 18, 2023

Evaporative technology for lithium mining from salt-lakes exacerbates freshwater scarcity and wetland destruction, suffers protracted production cycles. Electrodialysis (ED) offers an environmentally benign alternative continuous extraction is amenable to renewable energy usage. Salt-lake brines, however, are hypersaline multicomponent mixtures, the impact of complex brine-membrane interactions remains poorly understood. Here, we quantify influence solution composition, salinity, acidity on counterion selectivity thermodynamic efficiency electrodialysis, leveraging 1250 original measurements with salt-lake brines that span four feed salinities, three pH levels, five current densities. Our experiments reveal commonly used binary cation solutions, which neglect Na+ K+ transport, may overestimate Li+/Mg2+ by 250% underpredict specific consumption (SEC) a factor 54.8. As result conditions, exposure brine weakens efficacy Donnan exclusion, amplifying Mg2+ leakage. Higher densities enhance potential across solution-membrane interface ameliorate degradation brines. However, steep trade-off between governs ED's performance: 6.25 times enhancement in accompanied 71.6% increase SEC. Lastly, our analysis suggests industrial-scale ED module can meet existing capacities, while being powered photovoltaic farm utilizes <1% salt-flat area.

Язык: Английский

Процитировано

55
Double charge flips of polyamide membrane by ionic liquid-decoupled bulk and interfacial diffusion for on-demand nanofiltration DOI Creative Commons
Bian‐Bian Guo, Chang Liu,

Cheng‐Ye Zhu

и другие.

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 13, 2024

Fine design of surface charge properties polyamide membranes is crucial for selective ionic and molecular sieving. Traditional face limitations due to their inherent negative limited modification range. Herein, we report a facile liquid-decoupled bulk/interfacial diffusion strategy elaborate the double flips membranes, enabling on-demand transformation from inherently highly positive near-neutral charges. The key these lies in meticulous utilization liquid that decouples intertwined diffusion, enhancing interfacial while inhibiting bulk diffusion. These charge-tunable can be customized impressive separation performance, example, profound Cl

Язык: Английский

Процитировано

53