Article
Engineering, Chemical
Yuhao Zhang, Haorui Wang, Tao Zhang, Zhi Geng, Wei Cheng
Summary: A facile citric acid chelated Fe(II)/PDS modification method was used to generate a controlled-release SO4.- oxidation condition at room temperature, which enhanced the performance of the membrane.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Qunhui Hu, Yongjie Yuan, Zhonghuan Wu, Hongwei Lu, Nanwen Li, Hailiang Zhang
Summary: This study developed surface modified TFC RO membranes and investigated the effect of different types of ionic groups on membrane fouling and scaling performances. The modified membranes showed improved hydrophilicity and changed zeta potential compared to the pristine membrane. The research provides insights for the development of anti-fouling and anti-scaling membranes.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shuang Hao, Jun Xiao, Lingshuang Liu, Yiwen Qin, Shaolu Li, Yunxia Hu
Summary: This study reports the development of antifouling thin-film composite (TFC) polyamide (PA) reverse osmosis (RO) membranes with inner and outer zwitterion-like layers. The modified RO membranes exhibit high water permeance and excellent antifouling properties against small organic foulants. The results provide insights for engineering polyamide RO membrane surfaces with superior separation performance and efficient anti-fouling properties.
Review
Engineering, Environmental
Chao Liu, Wenjing Wang, Bo Yang, Ke Xiao, Huazhang Zhao
Summary: This paper reviews the progress in the research and development of RO membrane technology, focusing on the mechanisms and strategies of contemporary separation, anti-fouling, and chlorine resistance of the PA RO membrane. The review provides insights into mitigation strategies and basic mechanisms for key challenges, along with discussions on operation and modification strategies. The review also addresses technical issues, challenges, and future perspectives of these mechanisms and strategies to guide new entrants and established researchers in the field of membrane water treatment.
Article
Chemistry, Multidisciplinary
Afang Zhao, Na Zhang, Qiang Li, Lianwen Zhou, Huining Deng, Zhenghua Li, Yi Wang, Enguang Lv, Zhen Li, Mei Qiao, Jihua Wang
Summary: In this study, high-performance nanocomposite reverse osmosis membranes were fabricated by synthesizing functionalized carbon nanotubes and embedding silver nanoparticles. The membrane exhibited improved water permeability and NaCl rejection, as well as excellent fouling resistance to model foulants. The long-term performance stability of the membrane was attributed to the compatibility between carbon nanotubes and the polyamide matrix.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Chemical
Vladimir Mankol, Zhan Hao, Song Zhao, Hongyu Wu, Yunlong Qi, Zhi Wang, Jixiao Wang
Summary: A modified TFC-RO membrane was prepared through interfacial polymerization to enhance scaling and fouling resistance, showing smoother and more hydrophilic surface properties. The study highlights a simple and efficient design approach for RO membranes to be used in desalination of mineral-silica and organic-fouling laden water.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Chemical
Zhonglong Yin, Qi Shao, Tiancheng Wen, Aimin Li, Chao Long
Summary: The study showed that the impact of ozone on coagulation to reduce RO membrane fouling depends on the type of biopolymer and Ca2+ concentration. Increasing Ca2+ concentration within a certain range can help alleviate membrane fouling by BSA and SA, but a further increase may deteriorate the fouling control.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Juntao Wang, Shao-Lu Li, Yaxu Guan, Can Zhu, Genghao Gong, Yunxia Hu
Summary: This study successfully improved the water flux, antifouling properties, and chlorine-resistance of PA RO membranes by grafting sulfonamide monomers onto the membrane surface. The modified membranes showed significant enhancements in performance, demonstrating great potential for applications in water treatment.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Engineering, Chemical
Feifei Shao, Xiu Su, Xinghua Shen, Shuxin Ren, Haoquan Wang, Zhan Yi, Chunwei Xu, Liyan Yu, Lifeng Dong
Summary: By grafting graphene oxide onto the membrane surface, excellent chlorine resistance modified membranes can be prepared. The number of layers of graphene oxide grafting affects the membrane separation performance and chlorine resistance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Qimao Gan, Lu Elfa Peng, Zhe Yang, Peng-Fei Sun, Li Wang, Hao Guo, Chuyang Y. Tang
Summary: Surfactant-assisted interfacial polymerization (IP) has shown the potential to improve the performance of thin film composite polyamide membranes. In this study, we found that the surfactant Tween 80 can enhance membrane performance, even though it decreases amine diffusion. The enhanced performance is attributed to the stabilization of nanobubbles by the surfactant, which leads to the formation of enlarged nanovoids and reduced defects in the polyamide layer. Furthermore, the surfactant-assisted membranes also exhibit better antifouling performance.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Yu-Qing Xu, Yin-Hu Wu, Xin Tong, Ke-Ying Song, Gen-Qiang Chen, Yuan Bai, Li-Wei Luo, Hao-Bin Wang, Zi-Wei Zhang, Nozomu Ikuno, Hong-Ying Hu
Summary: This study summarized the pressure-time curves of reverse osmosis membranes into 3 types and developed an Integrated Spherical Diffusion Cell (SDC) model that fitted the data better than other models. The model showed superior fitting performance to the operational data of a full-scale RO system and could predict subsequent pressure growth within a 20% increase compared to the original pressure. The findings are applicable to industrial practice and may enable further research in the pressure growth pattern of constant flux RO filtration.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yamin Li, Shengwei Sun
Summary: In this study, a commercial polyamide reverse osmosis membrane was modified by surface gelation using sodium alginate as a coating agent. The modified membrane exhibited improved hydrophilicity, smoothness, negative charge, and slightly improved selectivity and permeability. Additionally, the modified membrane showed good durability and antifouling performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Chemical
Zhenhua Lue, Guoliang Ding, Meihong Liu, Sanchuan Yu, Congjie Gao
Summary: In this study, a new coating layer of polyvinyl alcohol (PVA)/polyquaternium-10 (PQ10) was developed on the surface of polyamide-based reverse osmosis (RO) membrane. Permeation tests showed that the incorporation of PQ10 into PVA significantly enhanced the water permeation ability of the coating layer. The coated membrane exhibited excellent anti-fouling performance and improved durability against chemical agents.
Article
Engineering, Chemical
Hao-Bin Wang, Yin-Hu Wu, Zhuo Chen, Yu-Qing Xu, Song Xue, Nozomu Ikuno, Nakata Koji, Hong-Ying Hu
Summary: This study compared the effects of ozone and FR110 on RO membrane fouling control in reclaimed water. The synergistic application of ozone and FR110 at low dosages effectively reduced fouling of the RO membranes. Further analysis showed that FR110 induced a thinner fouling layer, while ozone pretreatment led to a loose fouling layer. Bacterial community analysis identified the relative abundance of biofouling-related genera as the key factor causing fouling differences.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Chemical
Young-Nam Kwon, Min-Jung Kim, Yong Taek Lee
DESALINATION AND WATER TREATMENT
(2016)
Article
Engineering, Chemical
Ki Yong Jee, Jae Sung Kim, Jinsoo Kim, Yong Taek Lee
DESALINATION AND WATER TREATMENT
(2016)
Article
Polymer Science
Tae Hwan Kim, Ki Yong Jee, Yong Taek Lee
MACROMOLECULAR RESEARCH
(2015)
Article
Engineering, Chemical
Ki Yong Jee, Dong Ho Shin, Yong Taek Lee
Article
Chemistry, Multidisciplinary
Ki Yong Jee, Nowon Kim, Yong Taek Lee
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2016)
Article
Chemistry, Multidisciplinary
Eunjoo Koh, Yong Taek Lee
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2017)
Article
Engineering, Chemical
Hee Min Park, Ki Yong Jee, Yong Taek Lee
JOURNAL OF MEMBRANE SCIENCE
(2017)
Article
Chemistry, Multidisciplinary
Jungin Mun, Hee Min Park, Eunjoo Koh, Yong Taek Lee
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2018)
Article
Engineering, Chemical
Ki Yong Jee, Yong Taek Lee
JOURNAL OF MEMBRANE SCIENCE
(2014)
Article
Polymer Science
Shamim-Ara Pervin, Arun Anand Prabu, Kap Jin Kim, Yong Taek Lee
MACROMOLECULAR RESEARCH
(2015)
Article
Chemistry, Multidisciplinary
Eunjoo Koh, Hee Min Park, Yong Taek Lee
Summary: This work developed an embossed nanofiber membrane (ENMs) with 3D patterns for air mask filtration, which showed higher surface area and filtration efficiency compared to planar nanofibrous materials (PNMs). The ENMs achieved excellent filtration efficiency through ionic modification, attracting pollutant particles to the membrane surface.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Eunjoo Koh, Yong Taek Lee
Summary: This study aims to enhance the self-cleaning effect of insulators and insulating covers by modifying their surface hydrophobicity. The use of nanocomposite fillers has shown to improve the insulation properties as well as the self-cleaning properties of the materials.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Pharmacology & Pharmacy
Eunjoo Koh, Yong Taek Lee
Summary: This study prepared nanocapsules with excellent self-controlled antimicrobial activity at specific pH and humidity conditions. The nanocapsule substrate had a large surface area and outer ligand brush, leading to rapid antibacterial response. The controlled release of the antimicrobial drug was achieved by the repellent electrostatic force and swelling properties of the ligand brushes.
Article
Engineering, Chemical
Hee Min Park, Mohamed Ismael, Hiromitsu Takaba, Yong Taek Lee
Summary: This study successfully fabricated acid-resistant nanofiltration membranes consisting of amide and urea groups, which showed excellent performance and robust acid stability under acidic conditions.
JOURNAL OF MEMBRANE SCIENCE
(2022)
