Metal-organic framework membranes: Recent development in the synthesis strategies and their application in oil-water separation

Deng, Yuying; Wu, Yanni; Chen, Guangquan; Zheng, Xilai; Dai, Min; Peng, Changsheng

doi:10.1016/j.cej.2020.127004

Cited by 187 publications

(72 citation statements)

References 194 publications

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“…MOF-based photocatalytic membrane have also been reported in several other fields of application, such as oil and water separation [158,159], phenol removal [160], and organic pollution [47,161]; which generally show that the MOF addition within the photocatalyst membrane can significantly improve the membrane performance although still challenging to conduct. Summary of MOFs-based MMM's performance is presented in Table 5.…”

Section: Mofs As Photocatalytic Filler For Photocatalytic Membranementioning

confidence: 99%

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

et al. 2021

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The accumulation of pollutants in water is dangerous for the environment and human lives. Some of them are considered as persistent organic pollutants (POPs) that cannot be eliminated from wastewater effluent. Thus, many researchers have devoted their efforts to improving the existing technology or providing an alternative strategy to solve this environmental problem. One of the attractive materials for this purpose are metal-organic frameworks (MOFs) due to their superior high surface area, high porosity, and the tunable features of their structures and function. This review provides an up-to-date and comprehensive description of MOFs and their crucial role as adsorbent, catalyst, and membrane in wastewater treatment. This study also highlighted several strategies to improve their capability to remove pollutants from water effluent.

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Section: Mofs As Photocatalytic Filler For Photocatalytic Membranementioning

confidence: 99%

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

et al. 2021

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“…A cationic charge -PVDF membranes were synthesized by polymerization technique using radiation-induced of ethylene glycol di-methacrylate and glycidyl methacrylate for oil wastewater treatment. [82,181] The grafted modified PVDF membrane -performance results in enhanced oil rejection reaching more than 98% and having a COD removal of about 59 ppm. The modified membrane was exhibiting higher oil rejection efficiently with a relatively low reversible fouling percentage of near 16.6% and imperceptible irreversible fouling.…”

Section: External Treatment For Membrane Surface Modificationmentioning

confidence: 99%

“…The effluent from the sedimentation tank pumped effluent to the RO unit. [81,82] Pretreatment with EC obtained a reduction of 92% for COD representing oils and other organics. [81] This result is acceptable with the recent environmental legislation for disposal in running water streams or sea, followed by a RO unit-it will give a permeate with almost 100% removal for organics expressed as COD and allow water recycling through the entire entity.…”

Section: Membranes Combined With Electrochemical Systemsmentioning

confidence: 99%

“…[141,149] The shape and size of additives play an essential role in the facileness of nanoparticle dispersion in the casting solution. [82] It was found before that spherical nanoparticles with particle size less than 100 nanometers can achieve more dispersion when compared with other structures as hexagonal or polyhedral nanoparticles with a little bit of additive aggregation together with agglomeration. [197] Inorganic nanoparticles added to polymer doped solution proved highly improving membrane strength and thus the lifetime of produced UF membrane.…”

Section: Current Status In Membrane Industry Serving Oil-water Emulsion Treatment and Future Strategy For Researchmentioning

confidence: 99%

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Recent Aspects in Membrane Separation for Oil/Water Emulsion

Shalaby

Sołowski

Abbas

2021

Adv Materials Inter

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found with other insoluble matter, presenting relevant problems with safe and convenient separation. The legal discharge of oil-water emulsions is a complex process. [4] Thus, environmental authorities have established stringent regulations to cope with it. [5] Depending on countries, the oil limits are concentrations below 40 ppm as in Vietnam, [6] and in other countries like Korea, the maximum is only five ppm of oil in discharge. [7] Generally, the oil phase in water has three forms, based on oil droplets, size of more than 150 micrometers is called free oil, but that size found from 50 to 150 micrometers is the dispersed oil, [8] finally, the emulsified oil less than 20 µm. There is an increasing interest in employing membrane technology for filtering smaller size oil droplets. In this review, oil-water emulsion problems are highlighted with oil-water separation techniques selection and their performance with varied oil concentration and composition of other immiscible or miscible components. [9] Membrane technology is known formerly to economically advantageous for oily wastewater (OWW) treatment compared with other conventional technologies. [9] Based on the literature, the membranebased treatment cost estimation was about 1 and 3 $ m −3 , [10] lower than for dissolved air floatation (DAF) treatment (cost was 3.65 $ m −3 ). Generally, the treatment cost depends on OWW sources, as each industry has its specific blends for oil and grease jointly with other membrane foulants. [11] For example, oil-water emulsions treatment from the fatty acid industry has a total capital cost (costs of membranes, electricity, labor, cleaning, and maintenance) of 2.65 $ m −3 , compared with the railroad industry (it was ranged from 1.03 to 1.48 $ m −3 ). These costs for the metalworking OWW using UF were 2.8 $ m −3 . In microfiltration (MF) membrane, the OWW membrane-based treatment for oil concentration of 50 ppm annual cost was estimated as 0.098 $ m −3 with a feed rate of 100 m 3 day −1 . [9] The cost of membrane-based treatment of OWW is generally varying but is lower than conventional technologies. [12] 1.1. Oil-Water Emulsions Sources, Environmental Hazard, and Discharge Limits An oil-water emulsion is either a waste stream product, or secondary product. These effluents are generated from different areas and industrial sectors like the petroleum& gas sector, food processing, shipping facilities and maritime, and many others Oily wastewater is generated by various industries in extraordinary growing volumes, such as oil refineries, petrochemicals, metallurgical, food & beverages, and dairy industries, which need oil removal for safe discharge to the environment. Lower cost of production with high oil removal and efficient performance compared to classical methods for treating oil-water emulsions attributed to the alleviation of operation. That emphasizes membrane modification to enhance wettability, hydrophilicity with the antifouling property such as membranes dealing with tiny oil emulsions to be the key parameters to im...

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“…As an emerging class of highly porous materials, metal-organic frameworks (MOFs) with three-dimensional lattice are formed via the coordination of inorganic metal ions and organic linkers ( Furukawa et al., 2013 ; Li et al., 1999 ; Zhou and Kitagawa, 2014 ). Owing to their large surface area and porosity, well-defined chemistry, and structural diversity, MOFs have been extensively explored as fillers in the design of MMMs ( Dechnik et al., 2017 ; Deng et al., 2021 ; Denny et al., 2016 ; Guo et al., 2019 , 2021 ; Lin et al., 2018 ; Ma et al., 2019a ; Seoane et al., 2015 ). The MOF-based MMMs are typically prepared by admixing the preformed MOF nanoparticles in the polymer solution to obtain the final casting mixture.…”

Section: Introductionmentioning

confidence: 99%

Polymerizable metal-organic frameworks for the preparation of mixed matrix membranes with enhanced interfacial compatibility

Chen

Yan

et al. 2021

iScience

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Summary The preparation of flawless and defect-free mixed matrix membranes (MMMs) comprising metal-organic framework (MOF) and polymer is often difficult owing to the poor MOF/polymer interface compatibility. Herein, we present the synthesis of an important family of pillared-layered MOFs with polymerizable moieties based on the parent structure [Zn 2 L 2 P] n [L = vinyl containing benzenedicarboxylic acid linkers; P = 4,4′-bipyridine (bipy)]. The crystalline structures of polymerizable MOFs were analyzed using single-crystal X-ray crystallography. The presence of reactive double bonds in MOFs was verified by the successful thiol-ene click reaction with sulfhydryl compounds. The subsequent copolymerization of polymerizable MOFs with organic monomers produced mixed matrix membranes with enhanced MOF/polymer interfacial adhesion that enabled good separation efficiency of CO 2 from flue gas. This strategy provides a stimulating platform to the preparation of highly efficient MMMs that are capable of mitigating energy consumption and environment issues.

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Metal-organic framework membranes: Recent development in the synthesis strategies and their application in oil-water separation

Cited by 187 publications

References 194 publications

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

Recent Improvement Strategies on Metal-Organic Frameworks as Adsorbent, Catalyst, and Membrane for Wastewater Treatment

Recent Aspects in Membrane Separation for Oil/Water Emulsion

Polymerizable metal-organic frameworks for the preparation of mixed matrix membranes with enhanced interfacial compatibility

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