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Title: Photocatalytic Nanofiltration Membranes with Self-Cleaning Property for Wastewater Treatment

 [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [1]
  1. MOE Key Laboratory of Macromolecular Synthesis and Functionalization, and Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027 China
  2. Nanoscience & Technology Division, Argonne National Laboratory, 9700 South Cass Avenue Lemont IL 60439 USA, Institute for Molecular Engineering, University of Chicago, Chicago IL 60637 USA
Publication Date:
Sponsoring Org.:
OSTI Identifier:
Grant/Contract Number:
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Advanced Functional Materials
Additional Journal Information:
Journal Volume: 27; Journal Issue: 27; Related Information: CHORUS Timestamp: 2017-10-20 17:23:17; Journal ID: ISSN 1616-301X
Wiley Blackwell (John Wiley & Sons)
Country of Publication:

Citation Formats

Lv, Yan, Zhang, Chao, He, Ai, Yang, Shang-Jin, Wu, Guang-Peng, Darling, Seth B., and Xu, Zhi-Kang. Photocatalytic Nanofiltration Membranes with Self-Cleaning Property for Wastewater Treatment. Germany: N. p., 2017. Web. doi:10.1002/adfm.201700251.
Lv, Yan, Zhang, Chao, He, Ai, Yang, Shang-Jin, Wu, Guang-Peng, Darling, Seth B., & Xu, Zhi-Kang. Photocatalytic Nanofiltration Membranes with Self-Cleaning Property for Wastewater Treatment. Germany. doi:10.1002/adfm.201700251.
Lv, Yan, Zhang, Chao, He, Ai, Yang, Shang-Jin, Wu, Guang-Peng, Darling, Seth B., and Xu, Zhi-Kang. 2017. "Photocatalytic Nanofiltration Membranes with Self-Cleaning Property for Wastewater Treatment". Germany. doi:10.1002/adfm.201700251.
title = {Photocatalytic Nanofiltration Membranes with Self-Cleaning Property for Wastewater Treatment},
author = {Lv, Yan and Zhang, Chao and He, Ai and Yang, Shang-Jin and Wu, Guang-Peng and Darling, Seth B. and Xu, Zhi-Kang},
abstractNote = {},
doi = {10.1002/adfm.201700251},
journal = {Advanced Functional Materials},
number = 27,
volume = 27,
place = {Germany},
year = 2017,
month = 5

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 16, 2018
Publisher's Accepted Manuscript

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  • Membrane fouling is one of the most severe problems restricting membrane separation technology for wastewater treatment. This work reports a photocatalytic nanofiltration membrane (NFM) with self-cleaning property fabricated using a facile biomimetic mineralization process. In this strategy, a polydopamine (PDA)/polyethyleneimine (PEI) intermediate layer is fabricated on an ultrafiltration membrane via a co-deposition method followed by mineralization of a photocatalytic layer consisting of beta-FeOOH nanorods. The PDA-PEI layer acts both as a nanofiltration selective layer and an intermediate layer for anchoring the beta-FeOOH nanorods via strong coordination complexes between Fe3+ and catechol groups. In visible light, the beta-(F)eOOH layer exhibits efficientmore » photocatalytic activity for degrading dyes through the photo-Fenton reaction in the presence of hydrogen peroxide, endowing the NFM concurrently with effective nanofiltration performance and self-cleaning capability. Moreover, the mineralized NFMs exhibit satisfactory stability under simultaneous filtration and photocatalysis processing, showing great potential in advanced wastewater treatment.« less
  • Wet oxidation and nanofiltration are employed in an integrated system for the treatment of bioresistant industrial wastewaters. The partial oxidation products formed during a brief period of pretreatment in a low pressure WO reactor are separated by nanofiltration, and larger molecules are recycled into the reactor where they undergo further oxidation. Experiments were carried out with polyethylene glycol as a model compound in aqueous solution, representing polymer manufacture wastewater. The results demonstrate that by using a combination of an oxidative and a separative step, a higher selectivity of the overall process toward partial oxidation can be achieved. The permeate leavingmore » the filtration step is mainly composed of short chain organic acids which could be readily biodegraded in a subsequent biological treatment, or discharged if concentrations are low.« less
  • A combination of self-consistent field theory and density functional theory was used to examine the stable, 3-dimensional equilibrium morphologies formed by diblock copolymers with a tethered nanoparticle attached either between the two blocks or at the end of one of the blocks. Both neutral and interacting particles were examined, with and without favorable/unfavorable energetic potentials between the particles and the block segments. The phase diagrams of the various systems were constructed, allowing the identification of three types of ordered mesophases composed of lamellae, hexagonally packed cylinders, and spheroids. In particular, we examined the conditions under which the mesophases could bemore » generated wherein the tethered particles were primarily located within the interface between the two blocks of the copolymer. Key factors influencing these properties were determined to be the particle position along the diblock chain, the interaction potentials of the blocks and particles, the block copolymer composition, and molecular weight of the copolymer.« less
  • This paper presents some of the experimental results from a study conducted to demonstrate the potential use of photocatalytic oxidation for decolorization and chemical oxygen demand (COD) reduction of wastewater from 5-fluorouracil manufacturing. A series of batch experiments, were carried out using diluted solutions of the wastewater with 0.1% w/v TiO{sub 2}. Low pressure mercury lamps were used to simulate the UV part of sunlight. The experiments showed that a complete decolorization and a substantial reduction of COD was achieved within 20 hours with a 20% solution. During the reaction period, the ph was noted to decrease considerably, indicating formationmore » of acids. Adding hydrogen peroxide to the solution was found to significantly increase the reaction rates. Adding 2,400 ppm of H{sub 2}O{sub 2} gave an 80% decrease in color in one hour and a 70--80% decrease in COD in 20 hours. The influence of UV-light intensity was also examined. This experiment showed that with a UV-intensity of 15 W/m2, i.e., a cloudy day, the decolorization rate was still considerable, while the COD reduction rate was very low.« less
  • A new reactor design for the use of titanium dioxide-coated fused-silica glass fibers for wastewater treatment is described. The manufacture of the coating of the fibers is explained in detail. 4-Chlorophenol was used as the test compound. The influences of temperature and irradiation wavelength and the effect of hydrogen peroxide addition were investigated. Activation energy for the initial attack of an OH radical on 4-chlorophenol was calculated to be 20.6 kJ/mol. Degradation rates and quantum yields obtained with this reactor were compared with results measured with Degussa P25 TiO[sub 2]-slurry treatment. With the present design, the degradation rate of 4-chlorophenolmore » is 1.6 times higher and the destruction of the total organic carbon (TOC) is 2.8 times faster. 35 refs., 6 figs., 4 tabs.« less