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Chen C, Yang Y, Lee CH, Takizawa S, Zhang Z, Ng HY, Hou LA. Functionalization of seawater reverse osmosis membrane with quorum sensing inhibitor to regulate microbial community and mitigate membrane biofouling. WATER RESEARCH 2024; 253:121358. [PMID: 38402750 DOI: 10.1016/j.watres.2024.121358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 02/06/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024]
Abstract
Membrane biofouling is a challenge to be solved for the stable operation of the seawater reverse osmosis (SWRO) membrane. This study explored the regulation mechanism of quorum sensing (QS) inhibition on microbial community composition and population-level behaviors in seawater desalination membrane biofouling. A novel antibiofouling SWRO membrane (MA_m) by incorporating one of quorum sensing inhibitors (QSIs), methyl anthranilate (MA) was prepared. It exhibited enhanced anti-biofouling performance than the exogenous addition of QSIs, showing long-term stability and alleviating 22 % decrease in membrane flux compared with the virgin membrane. The results observed that dominant bacteria Epsilon- and Gamma-proteobacteria (Shewanella, Olleya, Colwellia, and Arcobacter), which are significantly related to (P ≤ 0.01) the metabolic products (i.e., polysaccharides, proteins and eDNA), are reduced by over 80 % on the MA_m membrane. Additionally, the introduction of MA has a more significant impact on the QS signal-sensing pathway through binding to the active site of the transmembrane sensor receptor. It effectively reduces the abundance of genes encoding QS and extracellular polymeric substance (EPS) (exopolysaccharides (i.e., galE and nagB) and amino acids (i.e., ilvE, metH, phhA, and serB)) by up to 50 % and 30 %, respectively, resulting in a reduction of EPS by more than 50 %, thereby limiting the biofilm formation on the QSI-modified membrane. This study provides novel insights into the potential of QSIs to control consortial biofilm formation in practical SWRO applications.
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Affiliation(s)
- Chao Chen
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Yu Yang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Chung-Hak Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea
| | - Satoshi Takizawa
- Department of Urban Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Zhenghua Zhang
- Institute of Environmental Engineering & Nano-Technology, Tsinghua-Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, Guangdong, China
| | - How Yong Ng
- Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai 519087, China; Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Li-An Hou
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
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2
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Verma C, Somani M, Rajput V, Bhan S, Nonglang FP, Lyngdoh A, Rymbai R, Gupta B. Antimicrobial finishing of polypropylene fabric using bioactive nanogels. POLYM ENG SCI 2023. [DOI: 10.1002/pen.26276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- Chetna Verma
- Bioengineering Laboratory, Department of Textile & Fiber Engineering Indian Institute of Technology New Delhi India
| | - Manali Somani
- Bioengineering Laboratory, Department of Textile & Fiber Engineering Indian Institute of Technology New Delhi India
| | - Vishav Rajput
- Bioengineering Laboratory, Department of Textile & Fiber Engineering Indian Institute of Technology New Delhi India
| | - Surya Bhan
- Department of Biochemistry North‐Eastern Hill University Shillong India
| | | | - Antonia Lyngdoh
- Department of Biochemistry North‐Eastern Hill University Shillong India
| | - Ridashisha Rymbai
- Department of Biochemistry North‐Eastern Hill University Shillong India
| | - Bhuvanesh Gupta
- Bioengineering Laboratory, Department of Textile & Fiber Engineering Indian Institute of Technology New Delhi India
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3
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Nikolova MP, Apostolova MD. Advances in Multifunctional Bioactive Coatings for Metallic Bone Implants. MATERIALS (BASEL, SWITZERLAND) 2022; 16:183. [PMID: 36614523 PMCID: PMC9821663 DOI: 10.3390/ma16010183] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
To fix the bone in orthopedics, it is almost always necessary to use implants. Metals provide the needed physical and mechanical properties for load-bearing applications. Although widely used as biomedical materials for the replacement of hard tissue, metallic implants still confront challenges, among which the foremost is their low biocompatibility. Some of them also suffer from excessive wear, low corrosion resistance, infections and shielding stress. To address these issues, various coatings have been applied to enhance their in vitro and in vivo performance. When merged with the beneficial properties of various bio-ceramic or polymer coatings remarkable bioactive, osteogenic, antibacterial, or biodegradable composite implants can be created. In this review, bioactive and high-performance coatings for metallic bone implants are systematically reviewed and their biocompatibility is discussed. Updates in coating materials and formulations for metallic implants, as well as their production routes, have been provided. The ways of improving the bioactive coating performance by incorporating bioactive moieties such as growth factors, osteogenic factors, immunomodulatory factors, antibiotics, or other drugs that are locally released in a controlled manner have also been addressed.
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Affiliation(s)
- Maria P. Nikolova
- Department of Material Science and Technology, University of Ruse “A. Kanchev”, 8 Studentska Str., 7017 Ruse, Bulgaria
| | - Margarita D. Apostolova
- Medical and Biological Research Lab., “Roumen Tsanev” Institute of Molecular Biology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Yaqub M, Nguyen MN, Lee W. Treating reverse osmosis concentrate to address scaling and fouling problems in zero-liquid discharge systems: A scientometric review of global trends. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 844:157081. [PMID: 35780878 DOI: 10.1016/j.scitotenv.2022.157081] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 06/24/2022] [Accepted: 06/27/2022] [Indexed: 05/26/2023]
Abstract
Currently, reverse osmosis concentrate (ROC) treatment is one of the most promising techniques for its disposal because it produces freshwater with high recovery and valuable materials such as salts and reduces waste volume and environmental pollution. Public attention to the severe consequences of water pollution and strict environmental regulations on wastewater discharge has pushed water-polluting industries toward zero-liquid discharge (ZLD). However, scaling and fouling problems increase energy consumption and limit permeate flux at high salt concentrations, mainly due to calcium, magnesium, and silica precipitation, ultimately decreasing ZLD performance. Therefore, this study discusses drivers and ROC pretreatment technologies to improve ZLD efficiency and presents a scientometric review of global trends. The advantages, disadvantages, and economic and environmental aspects of conventional and emerging pre-treatment technologies were studied. Traditional treatment of chemical processes combined with precipitation removes a large amount of scaling ions; however, high operation and maintenance costs and limited full-scale plant experience are the main drawbacks. Softening and coagulation are most commonly applied to treat large volumes at a moderate cost; however, substantial sludge production and increased conductivity are major operational issues. Moreover, emerging technologies efficiently remove scale-forming ions with high capital and operating costs. New variations in standard reverse osmosis technologies have improved ZLD efficiency; nonetheless, scaling and fouling are of concern. Therefore, this review presents the studies on ROC pre-treatment technologies for removing scaling ions to enhance ZLD efficiency, which can help in future research.
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Affiliation(s)
- Muhammad Yaqub
- Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea.
| | - Mai Ngoc Nguyen
- Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea
| | - Wontae Lee
- Department of Environmental Engineering, Kumoh National Institute of Technology, Gumi, Republic of Korea.
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5
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Anti-biofouling polyvinylidene fluoride/quaternized polyvinyl alcohol ultrafiltration membrane selectively separates aromatic contaminants from wastewater by host–guest interactions. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Zhang X, Zhao M, Yu H, Wang J, Sun W, Li Q, Cao X, Zhang P. Robust In Situ Fouling Control toward Thin-Film Composite Reverse Osmosis Membrane via One-Step Deposition of a Ternary Homogeneous Metal-Organic Hybrid Layer. ACS APPLIED MATERIALS & INTERFACES 2022; 14:7208-7220. [PMID: 35089006 DOI: 10.1021/acsami.1c19931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Membrane fouling is one of the persistent headaches for water desalination because of the significant detriment to membrane performance and operating cost control. It is a great challenge to overcome such crisis in a facile and robust manner. This work was dedicated to customizing an antifouling thin-film composite (TFC) reverse osmosis (RO) membrane with a polydopamine (PDA)/β-alanine (βAla)/Cu2+ ternary homogeneous metal-organic hybrid coating. The metal ions were evenly distributed in a continuous organic network via polydentate coordination. The incorporation of βAla enabled a substantial promotion of the Cu2+ loading capacity on the membrane surface. The involved one-step codeposition protocol made the surface engineering practically accessible. The deposition time was optimized to afford an uncompromising permselectivity of the membrane. This novel trinity was a smart blend of anti-adhesive and bactericidal factors, and each component in the all-in-one layer performed its own function. The hydrophilic PDA/βAla phase induced weak deposition propensity of organic foulant and bacteria onto the modified membrane, as elucidated by water flux variation, foulants adhesion profile, and interfacial interaction energy. Meanwhile, the Cu2+-loaded surface strongly inactivated the attached bacteria to further alleviate biofouling. Excellent sustainability and stability implied the reliable performance of such trinity-coated membrane in practical service. Given the simplicity and robustness, this work opened a promising avenue for in situ fouling control of TFC RO membranes during water desalination.
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Affiliation(s)
- Xiaotai Zhang
- The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources (Tianjin), Tianjin 300192, China
| | - Man Zhao
- The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources (Tianjin), Tianjin 300192, China
| | - Hui Yu
- The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources (Tianjin), Tianjin 300192, China
| | - Jian Wang
- The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources (Tianjin), Tianjin 300192, China
| | - Wei Sun
- The Institute of Seawater Desalination and Multipurpose Utilization, Ministry of Natural Resources (Tianjin), Tianjin 300192, China
| | - Qiang Li
- Shandong Key Laboratory of Biophysics, Institute of Biophysics, Dezhou University, Dezhou 253023, China
| | - Xingzhong Cao
- Multi-discipline Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Peng Zhang
- Multi-discipline Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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Lu X, Wu Z, Xu K, Wang X, Wang S, Qiu H, Li X, Chen J. Multifunctional Coatings of Titanium Implants Toward Promoting Osseointegration and Preventing Infection: Recent Developments. Front Bioeng Biotechnol 2021; 9:783816. [PMID: 34950645 PMCID: PMC8691702 DOI: 10.3389/fbioe.2021.783816] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 10/25/2021] [Indexed: 01/27/2023] Open
Abstract
Titanium and its alloys are dominant material for orthopedic/dental implants due to their stable chemical properties and good biocompatibility. However, aseptic loosening and peri-implant infection remain problems that may lead to implant removal eventually. The ideal orthopedic implant should possess both osteogenic and antibacterial properties and do proper assistance to in situ inflammatory cells for anti-microbe and tissue repair. Recent advances in surface modification have provided various strategies to procure the harmonious relationship between implant and its microenvironment. In this review, we provide an overview of the latest strategies to endow titanium implants with bio-function and anti-infection properties. We state the methods they use to preparing these efficient surfaces and offer further insight into the interaction between these devices and the local biological environment. Finally, we discuss the unmet needs and current challenges in the development of ideal materials for bone implantation.
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Affiliation(s)
- Xiaoxuan Lu
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
| | - Zichen Wu
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
| | - Kehui Xu
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
| | - Xiaowei Wang
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
| | - Shuang Wang
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
| | - Hua Qiu
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
| | - Xiangyang Li
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
| | - Jialong Chen
- Key Laboratory of Oral Diseases Research of Anhui Province, Stomatologic Hospital and College, Anhui Medical University, Hefei, China
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8
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Alginate hydrogel interlayer assisted interfacial polymerization for enhancing the separation performance of reverse osmosis membrane. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119680] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Desalination membranes with ultralow biofouling via synergistic chemical and topological strategies. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119212] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Liu G, Yu R, Jiang J, Ding Z, Ma J, Liang R. Robust immobilization of anionic silver nanoparticles on cellulose filter paper toward a low-cost point-of-use water disinfection system with improved anti-biofouling properties. RSC Adv 2021; 11:4873-4882. [PMID: 35424442 PMCID: PMC8694556 DOI: 10.1039/d0ra09152a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 01/14/2021] [Indexed: 12/29/2022] Open
Abstract
Silver nanoparticle (AgNP)-decorated cellulose filter paper (FP), a low-cost point-of-use (POU) water disinfection system, can supply affordable and safe drinking water for people in desperate need, especially in rural areas in developing countries. However, owing to the unstable immobilization of AgNPs, silver can leach into the treated drinking water from the FP and exceed the World Health Organization (WHO) drinking water limit (<100 μg L-1), which is a potential threat to both human health and the environment. In this work, in order to robustly immobilize anionic silver nanoparticles (GA@AgNPs), we facilely prepared lipoic acid-modified cellulose filter paper (LA-FP), in which GA@AgNPs were robustly immobilized onto filter paper (GA@AgNPs-LA-FP) by strong chelation via the disulfide bond of LA with the surface of the silver nanoparticles. GA@AgNPs-LA-FP exhibited both excellent bacterial anti-adhesion activity and strong bactericidal activity, which can synergistically mitigate biofouling by inhibiting biofilm formation on the paper surface. Moreover, employed as a gravity-driven bactericidal filter, the GA@AgNPs-LA-FP membrane treated 100 mL of river water within 10 min, and the resulting water quality met the WHO drinking water standards, indicating this material's practical application for POU water disinfection.
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Affiliation(s)
- Gongyan Liu
- College of Biomass Science and Engineering, Sichuan University Chengdu 610065 China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University Chengdu 610065 China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University Chengdu 610065 China
| | - Ruiquan Yu
- College of Biomass Science and Engineering, Sichuan University Chengdu 610065 China
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University Chengdu 610065 China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University Chengdu 610065 China
| | - Jing Jiang
- College of Biomass Science and Engineering, Sichuan University Chengdu 610065 China
| | - Zhuang Ding
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University Chengdu 610065 China
| | - Jing Ma
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University Chengdu 610065 China
| | - Ruifeng Liang
- The State Key Laboratory of Hydraulic and Mountain River Engineering, Sichuan University Chengdu 610065 China
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11
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Zhang X, Huang H, Li X, Wang J, Wei Y, Zhang H. Bioinspired chlorine-resistant tailoring for polyamide reverse osmosis membrane based on tandem oxidation of natural α-lipoic acid on the surface. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118521] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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12
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Khan R, Wang H, Li Y, Yu S, Khan MK, Xiao K, Huang X. Surface Grafting of Reverse Osmosis Membrane with Chlorhexidine Using Biopolymer Alginate Dialdehyde as a Facile Green Platform for In Situ Biofouling Control. ACS APPLIED MATERIALS & INTERFACES 2020; 12:37515-37526. [PMID: 32701290 DOI: 10.1021/acsami.0c06037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report a new robust and green facile platform for nonoxidizing chemical grafting to simultaneously improve antifouling and antibacterial properties of thin film composite (TFC) polyamide (PA) reverse osmosis (RO) membranes. In this work, alginate dialdehyde (ADA) was used as a green platform to graft chlorhexidine (CH), a nonoxidizing chemical, on TFC-RO membrane surface. A synergistic effect due to ADA and CH grafting was revealed. The modified membrane surfaces were characterized using XPS, FT-IR, AFM, SEM-EDS, contact angle, and zeta potential analysis. A simple two-step Schiff base reaction was performed. Improved salt rejection performances were observed for the grafted PA membranes at the expense of negligible flux drop for the CH-ADA-PA membranes (38 to 42 L m-2 h-1) compared with the pristine PA membrane (45 L m-2 h-1). All the CH-ADA-PA membranes had excellent antibacterial activity against E. coli along with a highly superior resistance to the formation of biofilms. Organic fouling behaviors with a protein (bovine serum albumin, BSA) and a surfactant (dodecyl trimethylammonium bromide, DTAB) were investigated as typical foulants for the grafted PA membranes. The results indicated that the CH-ADA-PA membranes showed the best antifouling performance followed by the ADA-PA membranes, the pristine membrane being the most inferior. Hence, these results pave the way for a new robust and green bioinspired route for practical application in RO membrane fouling control.
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Affiliation(s)
- Rashid Khan
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Han Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Yufang Li
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Shuyan Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - M Kamran Khan
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Kang Xiao
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
- Research and Application Center for Membrane Technology, School of Environment, Tsinghua University, Beijing 100084, China
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Liu G, Jiang J, Yu R, Yan H, Liang R. Silver Nanoparticle-Incorporated Porous Renewable Film as Low-Cost Bactericidal and Antifouling Filter for Point-of-Use Water Disinfection. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00157] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Gongyan Liu
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
- National Engineering Laboratory of Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China
| | - Jing Jiang
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
- National Engineering Laboratory of Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China
| | - Ruiquan Yu
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
- National Engineering Laboratory of Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
- The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China
| | - Hui Yan
- College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Ruifeng Liang
- The State Key Laboratory of Hydraulic and Mountain River Engineering, Sichuan University, Chengdu 610065, China
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14
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The Recent Progress in Modification of Polymeric Membranes Using Organic Macromolecules for Water Treatment. Symmetry (Basel) 2020. [DOI: 10.3390/sym12020239] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
For decades, the water deficit has been a severe global issue. A reliable supply of water is needed to ensure sustainable economic development in population growth, industrialization and urbanization. To solve this major challenge, membrane-based water treatment technology has attracted a great deal of attention to produce clean drinking water from groundwater, seawater and brackish water. The emergence of nanotechnology in membrane science has opened new frontiers in the development of advanced polymeric membranes to enhance filtration performance. Nevertheless, some obstacles such as fouling and trade-off of membrane selectivity and permeability of water have hindered the development of traditional polymeric membranes for real applications. To overcome these issues, the modification of membranes has been pursued. The use of macromolecules for membrane modification has attracted wide interests in recent years owing to their interesting chemical and structural properties. Membranes modified with macromolecules have exhibited improved anti-fouling properties due to the alteration of their physiochemical properties in terms of the membrane morphology, porosity, surface charge, wettability, and durability. This review provides a comprehensive review of the progress made in the development of macromolecule modified polymeric membranes. The role of macromolecules in polymeric membranes and the advancement of these membrane materials for water solution are presented. The challenges and future directions for this subject are highlighted.
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16
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Wang S, Yang Y, Li W, Wu Z, Li J, Xu K, Zhang W, Zheng X, Chen J. Study of the Relationship Between Chlorhexidine-Grafted Amount and Biological Performances of Micro/Nanoporous Titanium Surfaces. ACS OMEGA 2019; 4:18370-18380. [PMID: 31720539 PMCID: PMC6844109 DOI: 10.1021/acsomega.9b02614] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/10/2019] [Indexed: 05/05/2023]
Abstract
Biomaterial-associated infection and lack of sufficient osseointegration contribute to a large proportion of implant failures. Therefore, antibacterial and osseointegration-accelerating properties are important in implant surface design. In this study, a micro/nanoporous titanium surface was prepared through alkaline and heat treatments, covalently conjugated with aminosilane. Then, varying amounts of chlorhexidine (CHX) were covalently grafted onto the aminosilane-modified surface via glutaraldehyde to obtain different CHX-grafted surfaces. These as-prepared surfaces were evaluated in terms of their surface chemical composition, surface topography, CHX grafting amount, antibacterial activity, and osteoblast compatibility. The results showed that the CHX grafting amount increased with increasing CHX concentrations, leading to better antibacterial activity. CHX (1 mg/mL) resulted in the best antibacterial surface, which still retained good osteoblast compatibility. Meanwhile, competitive bacterial-cell adhesion analysis demonstrated that this surface has great value for osteoblast adhesion at the implant-bone interface even in the presence of bacteria. This effortless, easily performed, and eco-friendly technique holds huge promise for clinical applications.
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Affiliation(s)
| | | | - Wei Li
- Stomatologic Hospital and College, Key
Laboratory of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
| | - Zichen Wu
- Stomatologic Hospital and College, Key
Laboratory of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
| | - Jiaojiao Li
- Stomatologic Hospital and College, Key
Laboratory of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
| | - Kehui Xu
- Stomatologic Hospital and College, Key
Laboratory of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
| | - Weibo Zhang
- Stomatologic Hospital and College, Key
Laboratory of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
| | - Xianyu Zheng
- Stomatologic Hospital and College, Key
Laboratory of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
| | - Jialong Chen
- Stomatologic Hospital and College, Key
Laboratory of Oral Diseases Research of Anhui Province, Anhui Medical University, Hefei, Anhui 230032, China
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