Multi-functional tannic acid (TA)-Ferric complex coating for forward osmosis membrane with enhanced micropollutant removal and antifouling property

Liu, Su; Tong, Xin; Liu, Sihua; An, Dong; Yan, Junchen; Chen, Yongsheng; Crittenden, John C.

doi:10.1016/j.memsci.2021.119171

Cited by 31 publications

(10 citation statements)

References 43 publications

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“…The increased differences in the pressure gradient across the membrane resulted in rise in water flux from 4.33 LMH to 13.27 LMH, and a decrease in specific salt ratio from 1.8 to 1.18. The increase in water flux with an increasing osmotic pressure of the DS is reported in other works (Achilli et al 2010;Liu et al 2021). The specific salt ratio indicates the selectivity of the FO membrane.…”

Section: Performance Of Cta Membranesupporting

confidence: 74%

“…Membrane surface coating enhance surface charge, hydrophilicity and decrease surface roughness (Miller et al 2017). But, it also increases the membrane resistance to water flux (Liu et al 2021). Thus, it is essential to look for a method that would not decrease the desirable properties of the membrane.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

“…Table 1 shows that the addition of porous materials (activated carbon, biochar, carbon nanotubes, and graphene oxide) in CS, improves the surface area, total pore volume and average pore size of the composite compared to CS (Hydari et al 2012;Nitayaphat & Jintakosol 2015;Debnath et al 2017;Khakpour & Tahermansouri 2018;Banu et al 2019). Recently, tannicacid-ferric (TA-Fe) complex coated on top of commercial CTA-FO membrane purchased from Fluid Technology Solutions, Inc. (FTS) (Albany, OR, USA) showed enhanced water flux, improved antifouling property, and micropollutant removal (Liu et al 2021). Similar improvement in the membrane performance was reported with polydopamine (PDA) coating on commercial thin-film composite (TFC) FO membrane obtained from Hydration Technology Innovations (HTI) (Guo et al 2018).…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Activated carbon incorporation on forward osmosis membrane surface for enhanced performance

Lakra¹,

Balakrishnan

Basu³

2021

Water Supply

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Cellulose triacetate (CTA) is the first-generation forward osmosis (FO) membrane used for desalination. There have been few chemical modifications of the CTA membrane surface. It has improved membrane hydrophilicity, water flux, and salt rejections compared to unmodified CTA membranes. Chitosan containing porous materials as composites resulted in increased pore characteristics. It has motivated to modify the surface of the commercial CTA forward osmosis (FO) membrane by surface coating with chitosan (CS) – powdered activated carbon (AC) mix. The membrane morphology was characterized by SEM, FTIR-ATR, contact angle measurement and AFM. Operation conditions for FO such as the orientation of the membrane active layer, feed and draw solution flow rates, type and concentration of draw salt were optimized with the original CTA membrane. The modified membrane exhibited around two-fold increase in the water flux and reduced reverse salt flux compared to the original CTA membrane. The improved water flux was attributed to the CS-AC coating enhancing water wettability of the membrane surface and the porous AC generating additional water flow channels. Overall, the water flux of the CTA-CS-AC membrane developed in this work was superior to that of CTA and cellulose acetate (CA) membranes reported in the literature.

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Section: Performance Of Cta Membranesupporting

confidence: 74%

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Activated carbon incorporation on forward osmosis membrane surface for enhanced performance

Lakra¹,

Balakrishnan

Basu³

2021

Water Supply

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“…Among the methods mentioned earlier, the RO technique is preferable for seawater desalination and is most extensively used in all desalination industry plants. In the RO process, water permeation through a semipermeable membrane is achieved by using a high external hydraulic pressure as an overcoming agent versus the osmotic pressure of the feed solution. ,, Hence, the RO process is a high pressure-driven technology that consumes a large quantity of energy, leading to high operating costs . The forward osmosis (FO) process, as a promising membrane purification method for desalination and wastewater treatment, has attracted more attention in recent years .…”

Section: Introductionmentioning

confidence: 99%

Reduction of the Structure Parameter of Forward Osmosis Membranes by Using Sodium Bicarbonate as Pore-Forming Agent

et al. 2021

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The forward osmosis (FO) process suffers from unfavorable internal concentration polarization (ICP) of the solute within the support layer of thin-film composite forward osmosis (TFC-FO) membranes. To lower the ICP effect, a support layer with low tortuosity, high porosity, and interconnected pores is necessary. In the present investigation, sodium bicarbonate has been presented as a simple pore-forming agent to decline the ICP within a poly(ethersulfone) substrate. In particular, the porous poly(ethersulfone) support layer was fabricated by embedding sodium bicarbonate into the casting solution to form CO2 gas bubbles in the substrate during phase inversion in an acidic nonsolvent. Experimental results revealed that the separation performance of the TFC-FO membranes significantly improved. The most water-permeable membrane was prepared in the acidic nonsolvent (TFC-SB.3) and it demonstrated a water flux of 26.6 LMH and a reverse salt flux of 3.6 gMH in the FO test. In addition, the TFC-SB.3 membrane showed an 85% increase in water permeability (2.13 LMH/bar) with negligible change in salt rejection (94.3%). Such observations were based on the increase of substrate porosity and the improved connectivity of the finger-like channels through in situ CO2 gas bubbling that alleviate the ICP phenomena. Therefore, the current study presents a simple, scalable method to design a high-performance TFC-FO membrane.

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“…Nanofiltration (NF) membrane, which is typically constructed in a thin-film composite (TFC) structure based on polyamide chemistry, has been increasingly applied in wastewater treatment and water reuse. − TFC polyamide NF membranes have been well-optimized for the removal of multivalent salts due to their historical roots in desalination. − However, current TFC polyamide membranes are inadequate for the removal of trace organic contaminants (TrOCs), particularly those neutral and hydrophobic compounds with relatively small molecular weights. − The poor TrOCs rejection originates from the hydrophobic nature of the polyamide layer, which promotes the transport of hydrophobic compounds via sorption and solution-diffusion mechanisms. , Moreover, the nonhomogeneous distribution of polar/nonpolar regions of the polyamide layer can act as additional hotspots to increase the possibility of TrOCs penetration. Therefore, developing nonpolyamide membranes that can more effectively remove TrOCs has received increasing attention in recent years. , …”

Section: Introductionmentioning

confidence: 99%

Enhancing Stability of Tannic Acid-Fe^III Nanofiltration Membrane for Water Treatment: Intercoordination by Metal–Organic Framework

Zhou

Dai

Wang

et al. 2022

Environ. Sci. Technol.

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Tannic acid (TA)-Fe III nanofiltration (NF) membrane has been demonstrated to possess more favorable removal of trace organic contaminants (TrOCs) over the conventional polyamide NF membrane. However, the drawback of acid instability severely hinders the practical application of TA-Fe III NF membrane in the treatment of (weak) acidic wastewater containing TrOCs (e.g., pharmaceutical wastewater, surface water, and drinking water). Herein, we introduced the MIL-101(Cr) nanoparticle, a kind of metal−organic framework (MOF), into the TA-Fe III selective layer to enhance the membrane acid stability. The acid-tolerance parameter of MIL-101(Cr)-stabilized TA-Fe III membrane (TA-Fe III -MOF membrane, 12,000 ppm/s −1 ) was two orders of magnitude larger than that of the TA-Fe III membrane (50 ppm/s −1 ), and the TA-Fe III -MOF membrane can withstand acid treatment at pH = 4 for more than 30 days. Meanwhile, the TA-Fe III -MOF membrane displayed increased water permeance from 9.5 to 12.7 L/(m 2 •h•bar) after the MOF addition, without compromising the selectivity. The enhanced acid stability for the TA-Fe III -MOF membrane was ascribed to an intercoordination mechanism, where Fe III centers (from TA-Fe III complex) coordinated with −COOH groups (from terephthalic acid of MOF) and Cr III centers (from MOF) coordinated with −OH groups (from TA of TA-Fe III complex), which was verified by the density functional theory calculation. This study highlights a new approach for the development of a TA-Fe III -based NF membrane with markedly enhanced acid stability, which is important for its real application in wastewater treatment and water reuse.

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Multi-functional tannic acid (TA)-Ferric complex coating for forward osmosis membrane with enhanced micropollutant removal and antifouling property

Cited by 31 publications

References 43 publications

Activated carbon incorporation on forward osmosis membrane surface for enhanced performance

Activated carbon incorporation on forward osmosis membrane surface for enhanced performance

Reduction of the Structure Parameter of Forward Osmosis Membranes by Using Sodium Bicarbonate as Pore-Forming Agent

Enhancing Stability of Tannic Acid-Fe^III Nanofiltration Membrane for Water Treatment: Intercoordination by Metal–Organic Framework

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Multi-functional tannic acid (TA)-Ferric complex coating for forward osmosis membrane with enhanced micropollutant removal and antifouling property

Cited by 31 publications

References 43 publications

Activated carbon incorporation on forward osmosis membrane surface for enhanced performance

Activated carbon incorporation on forward osmosis membrane surface for enhanced performance

Reduction of the Structure Parameter of Forward Osmosis Membranes by Using Sodium Bicarbonate as Pore-Forming Agent

Enhancing Stability of Tannic Acid-FeIII Nanofiltration Membrane for Water Treatment: Intercoordination by Metal–Organic Framework

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Enhancing Stability of Tannic Acid-Fe^III Nanofiltration Membrane for Water Treatment: Intercoordination by Metal–Organic Framework