Nanofiltration membrane achieving dual resistance to fouling and chlorine for “green” separation of antibiotics

Cheng, Xi Quan; Liu, Yuyan; Guo, Zhanhu; Shao, Lu

doi:10.1016/j.memsci.2015.06.048

Cited by 132 publications

(44 citation statements)

References 65 publications

(139 reference statements)

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“…Several water sources for our daily lives and industries typically contain oil, which has become the most common pollutant worldwide. In recent years, it is possible to find a large amount of research work about membranes for the treatment of oily wastewater in the literature, not only in experimental but also in theoretical terms [3][4][5][6][7] . One of the major problems of the industries is the treatment of the effluent before being discharged in the environment or in a public sewage system.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Membranes of Polyamide Applied in Treatment of Waste Water

et al. 2017

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In this work, it was prepared hybrid membranes of polyamide6 (PA6) with montmorillonite (MMT) and porogenic agent (CaCl 2 ). The hybrid membranes with CaCl 2 were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), porosimetry by mercury intrusion (PMI), flux measurements and rejection. By means of X-ray diffraction, it was revealed that the hybrid membranes with CaCl 2 have an exfoliated and/or partially exfoliated structure. For FTIR and DSC of hybrid membranes with CaCl 2 , it was found that the spectra and the crystalline melting temperature remained virtually unchanged compared to PA6 membrane. From the SEM images, it was observed that the addition of the MMT and the CaCl 2 in the membrane of PA6 caused an increase in the amount of pores the surface and cross section of these membranes. By PMI, it was observed that the presence of MMT and CaCl 2 in the membrane caused an increase in the average diameters of pores. The water-oil separation tests, indicated a significant reduction of oil in the permeate, allowing treatment of wastewater contaminated with oil.

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Section: Introductionmentioning

confidence: 99%

Hybrid Membranes of Polyamide Applied in Treatment of Waste Water

et al. 2017

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“…Lower permeate fluxes associated with the increase on solute concentration were already explained by the Spiegler-Kedem-Kachalsky (SKK) model, which states that the fluxes of solute and solvent are directly related to the chemical potential differences between the two sides of the membrane [39]. Other studies [7,34,40], using NF membranes treating pharmaceutics-containing wastewater, have also reported this behavior. Table 5 displays the rejections as a function of the MW and concentration of the antibiotic and of the feed flow rate for both membranes: NF97 (200 Da MWCO) and NF270 (400 Da MWCO).…”

Section: Effect Of Control Factors On Permeate Fluxmentioning

confidence: 85%

Experimental Design as a Tool for Optimizing and Predicting the Nanofiltration Performance by Treating Antibiotic-Containing Wastewater

et al. 2020

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In recent years, there has been an increase in studies regarding nanofiltration-based processes for removing antibiotics and other pharmaceutical compounds from water and wastewater. In this work, a 2k factorial design with five control factors (antibiotic molecular weight and concentration, nanofiltration (NF) membrane, feed flow rate, and transmembrane pressure) was employed to optimize the NF performance on the treatment of antibiotic-containing wastewater. The resulting multiple linear regression model was used to predict the antibiotic rejections and permeate fluxes. Additional experiments, using the same membranes and the same antibiotics, but under different conditions of transmembrane pressure, feed flow rate, and antibiotic concentration regarding the 2k factorial design were carried out to validate the model developed. The model was also evaluated as a tertiary treatment of urban wastewater for removing sulfamethoxazole and norfloxacin. Considering all the conditions investigated, the tightest membrane (NF97) showed higher antibiotics rejection (>97%) and lower permeate fluxes. On the contrary, the loose NF270 membrane presented lower rejections to sulfamethoxazole, the smallest antibiotic, varying from 65% to 97%, and permeate fluxes that were about three-fold higher than the NF97 membrane. The good agreement between predicted and experimental values (R2 > 0.97) makes the model developed in the present work a tool to predict the NF performance when treating antibiotic-containing wastewater.

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“…The chlorine‐tolerance performance is an important index for measuring NF membranes because free chlorine is extensively applied to the inhibition of bacteria during the water production process . Without chlorine‐tolerant membranes, raw water has to first be dechlorinated before NF and then rechlorinated for continuous disinfection; this is a waste of resources . In this study, we examined the chlorine resistances of the three different NF membranes for long‐term use.…”

Section: Resultsmentioning

confidence: 99%

High‐performance composite nanofiltration membranes fabricated via ternary mixture: Complementary preponderance of the fluorine‐containing monomer 2,2′‐bis(1‐hydroxyl‐1‐trifluoromethyl‐2,2,2‐triflutoethyl)‐4,4′‐methylene dianiline and the rigid monomer bisphenol F

Tang

Ding

et al. 2018

J of Applied Polymer Sci

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In a previous study, we proved that tailoring the polyamide backbone stiffness is an effective way to fabricate high‐performance polyamide nanofiltration (NF) membranes. However, in the previous study, we mainly focused on the flat membrane and did not consider its chlorine tolerance. In this study, by regulating the aqueous‐phase compositions in the interfacial polymerization process, chlorine tolerance on NF hollow‐fiber membranes was endowed while the membrane performance stayed high. The experimental results show that when the ratio of Piperazine (PIP)–bisphenol F (BPF)/2,2′‐bis(1‐hydroxyl‐1‐trifluoromethyl‐2,2,2‐triflutoethyl)‐4,4′‐methylene dianiline (BHTTM) was 5:1:4, the NF membrane possessed a permeate flux of 21.0 L m−2 h−1 bar−1 and an Na2SO4 rejection up to 90.0%. X‐ray photoelectron spectroscopy analysis also confirmed that the polymerization degree of the PIP–BPF–BHTTM NF membrane was the highest. Moreover, the NF membrane could tolerate active chlorine to over 10,000 ppm h Cl. After the active chlorine treatment, the permeate flux increased over 30.0 L m−2 h−1 bar−1, and the Na2SO4 rejection was about 90.0%. Although the PIP–BHTTM NF membrane also possessed good chlorine tolerance, its permeate flux (after active chlorine treatment) was only 60% of that of the PIP–BPF–BHTTM NF membrane. Therefore, the PIP–BPF–BHTTM NF membrane possessed a combination of high flux and high chlorine tolerance and showed good potential in water treatment in rigorous environments. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46482.

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Nanofiltration membrane achieving dual resistance to fouling and chlorine for “green” separation of antibiotics

Cited by 132 publications

References 65 publications

Hybrid Membranes of Polyamide Applied in Treatment of Waste Water

Hybrid Membranes of Polyamide Applied in Treatment of Waste Water

Experimental Design as a Tool for Optimizing and Predicting the Nanofiltration Performance by Treating Antibiotic-Containing Wastewater

High‐performance composite nanofiltration membranes fabricated via ternary mixture: Complementary preponderance of the fluorine‐containing monomer 2,2′‐bis(1‐hydroxyl‐1‐trifluoromethyl‐2,2,2‐triflutoethyl)‐4,4′‐methylene dianiline and the rigid monomer bisphenol F

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