Article
Engineering, Chemical
Boda Li, Zhenyi Wang, Shuangqing Xia, Bin Zhang, Wenqian Li, Wei Qiu, Jun Ma, An Ding, Xu He
Summary: Natural organic matter humic acid (HA) coupled with inorganic metal oxides FeOx + MnOx can cause severe and irreversible membrane fouling. Chemical cleaning methods have limitations, but the solid alternative calcium peroxide (CaO2) provides a promising option for membrane cleaning. CaO2 can restore membrane flux dramatically and achieve outstanding cleaning performance through the oxidation of HA and the involvement of FeOx + MnOx.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Yatong Li, Xinbo Zhang, Huu Hao Ngo, Wenshan Guo, Dan Zhang, Huizhong Wang, Tianwei Long
Summary: Applying magnetic biochar as a UF membrane pretreatment strategy can effectively reduce membrane fouling in water purification processes.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Wenyu Wang, Min Yang, Huifang Ma, Zhibao Liu, Ligang Gai, Zhishuo Zheng, Hongfang Ma
Summary: Microplastics have been found in drinking water, posing a risk to water quality by absorbing humic acid. This study investigated the behavior and mechanism of removing these microplastics and microplastics-humic acid compounds using coagulation-ultrafiltration technology. The results showed that aluminum-based salt was more efficient in removing both polystyrene and humic acid, and the optimal dosage for the composite system was higher than that for individual systems. The study also identified the main binding sites and weakening effects of various mechanisms during coagulation, as well as the alleviating effects of a formed cake layer and the presence of humic acid on membrane fouling. Overall, this research provides guidance for improving traditional drinking water treatment processes to remove microplastics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
M. A. C. K. Hansima, A. T. Jayaweera, J. Ketharani, Tharindu Ritigala, Libing Zheng, D. R. Samarajeewa, K. G. N. Nanayakkara, Ajith C. Herath, Madhubhashini Makehelwala, K. B. S. N. Jinadasa, S. K. Weragoda, Yuansong Wei, Rohan Weerasooriya
Summary: Humic substances (HS) are heterogeneous organic polymers that show monotonous properties. Due to their high organic content in groundwater, they can cause fouling of EDR ion exchange membranes. The fouling mechanisms of humic acid (HA) and fulvic acid (FA) were compared, and it was found that HA fouling is irreversible compared to FA fouling. Understanding these subtle differences can help implement appropriate pretreatments to ensure the durability of EDR membranes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Bin Jiang, Binxing Hu, Na Yang, Luhong Zhang, Yongli Sun, Xiaoming Xiao
Summary: This study investigated the effect of turbulence promoter on prolonging membrane life and reducing fouling. The turbulence promoter was found to decrease humic acid deposition and improve hydraulic conditions, leading to increased flux and reduced flux decay rate. The results suggest that the turbulence promoter can enhance membrane performance and serve as a reference for membrane life prediction.
Article
Nanoscience & Nanotechnology
Shiwei Guo, Huiru Zhang, Xiangrong Chen, Shichao Feng, Yinhua Wan, Jianquan Luo
Summary: In this study, a loose polyamide nanofiltration (NF) membrane with higher flux, better selectivity, and more stable separation performance was tailored through alkaline post-etching, with potential applications in long-term filtration. The membrane's performance could be easily adjusted by controlling different parameters, and it exhibited excellent antiswelling ability attributed to mechanisms such as decreased carboxyl proportion, enhanced interface interaction, and network locking.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Chemical
Yatong Li, Xinbo Zhang, Huu Hao Ngo, Wenshan Guo, Tianwei Long, HaiTao Wen, Dan Zhang
Summary: In this study, magnetic biochar-iron cross-linking alginate (MBCA) beads were prepared using alginate doped with coffee grounds to alleviate the membrane fouling caused by natural organic matter (NOM) in ultrafiltration (UF) process. The combination of MBCA-beads and peroxymonosulfate (PMS) served as an UF pre-treatment, and proved effective in completely alleviating the membrane fouling caused by humic acid (HA). The MBCA-beads/PMS pretreatment could remove 98% of UV254 and 68% of DOC when HA and sodium alginate (SA) were present together.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Elham Shokri, Ebrahim Shahed, Milad Hermani, Habib Etemadi
Summary: This study aimed to develop highly permeable and fouling resistant PVC ultrafiltration membranes using natural and modified montmorillonites with folic acid. The addition of folic acid modified montmorillonite improved membrane morphology, porosity, hydrophilicity, roughness, mechanical strength, pure water flux, and antifouling properties. The optimized membrane with 1.0 wt% Mt-FA showed excellent flux recovery ratio and humic acid rejection, indicating its potential for practical applications in water treatment.
APPLIED CLAY SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Vedrana Prorok, Dejan Movrin, Natasa Lukic, Svetlana Popovic
Summary: This paper presents an analysis of the fouling of a ceramic membrane by a mixture containing high concentrations of humic acid and colloidal silica during cross-flow ultrafiltration under various operating conditions. The experiments showed that colloidal silica exacerbates fouling and results in lower fluxes compared to the humic acid feed water. However, under certain conditions, lower concentrations of humic acid can lead to reduced fouling and higher fluxes.
Article
Environmental Sciences
Huikai Liang, Weiying Xu, Baoyou Shi, Xin Huang
Summary: The study found that in a mixed system of cyanobacterium M. aeruginosa and humic acid (HA), the presence of HA can improve the removal efficiency of extracellular organic matter (EOM) and reduce membrane fouling. The interaction between HA and EOM strengthens charge neutralization and reduces chemical bonds, positively impacting the coagulation process.
Article
Engineering, Chemical
Nasim Barati, Maen M. Husein, Jalel Azaiez
Summary: This study utilized in-situ generated iron oxide nanoparticles to alleviate membrane fouling caused by the combined effect of organic-inorganic substances. Modified membranes displayed significantly enhanced antifouling characteristics compared to pristine membranes, with up to 60% lower flux decline and 22% reduction in irreversible fouling. The study provides insights into the fouling mechanisms and suggests effective and inexpensive membrane modification techniques for fouling mitigation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Dagmar Olafsdottir, Bing Wu
Summary: The study found that humic acid can accelerate alginate fouling under both dead-end and crossflow conditions with different filtration mechanisms. Intermittent relaxation during crossflow can alleviate medium viscosity alginate fouling. High temperature clean water flushing is the most effective way to maintain membrane performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
Haibo Yin, Junyang Zhang, Yunlong Wang, Xiaoguang Zhao, Yakun Qu, Yue Peng, Hexing Li, Yuning Huo, Junhua Li
Summary: The photocatalytic membrane reactor (PMR) has the potential to remove foulants effectively, but current PMR systems face limitations due to membrane fouling and instability. In this study, PdCu alloy deposited on TiO2 incorporated with a polyvinylidene fluoride membrane achieved high rejection efficiency of humic acid (HA) with improved permeation and anti-fouling performance. The alloying effect of PdCu-TiO2 played multiple roles in enhancing PMR performance, including enhancing HA adsorption and improving photocatalytic HA removal, as well as inducing a photothermal effect that enhanced membrane permeation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Sohee Park, Seungju Choi, Yeong Kyu Lee, Yongseok Jho, Seoktae Kang, Dong Soo Hwang
Summary: This study investigated the use of cation-E interactions to address the problem of hydraulically irreversible membrane fouling in membrane-based water purification. Results showed that the addition of 1-ethyl-3-methylimidazolium effectively removed the hydrophobic HA layer by weakening its cohesion.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Yifan Wang, Xing Zheng, Dongfei Li, Jiayu Tian, Hua Wu, Yaozhong Zhang
Summary: The adsorption behavior of sodium alginate, humic acid, and bovine serum albumin on PVDF membranes was investigated using quartz crystal microbalance and dissipation (QCM-D) and atomic force microscopy (AFM) detection. The adhesion force between organics and membrane affected the adsorption rate at the initial fouling stage, while the interaction force among the organic molecules was connected to the degree of irreversible fouling and the structure of the fouling layer. Under the same ionic strength conditions, calcium (Ca2+) enhanced organic fouling compared to sodium (Na+), which is consistent with the XDLVO theory. Bovine serum albumin (BSA) showed higher deposition in mass, adsorption rate, and irreversibility than the other two organics due to stronger interaction forces among BSA molecules and a denser fouling layer. The adsorption process followed a pseudo-second-order kinetic model for sodium alginate (SA) and BSA, while humic acid (HA) conformed to a pseudo-first order kinetic model.
Article
Environmental Sciences
Qingyi Zeng, Jing Tan, Beibei Gao, Tao Cai, Qingyan Zhang, Yi-Lin Liu, Sheng Chang, Shuaifei Zhao, Suqing Wu
Summary: A cobalt-doped perovskite molybdenum trioxide catalyst was synthesized and used for degrading organic contaminants. The unique structure of the catalyst facilitated the activation of peroxymonosulfate, resulting in efficient removal of bisphenol A. Singlet oxygen was identified as the main active species for the degradation process. The carrier mechanism allowed the catalyst to maintain high performance during repeat use.
Article
Engineering, Chemical
Shiyang Huang, Jaleh Mansouri, James A. McDonald, Stuart J. Khan, Greg Leslie, Chuyang Y. Tang, Anthony G. Fane
Summary: This work proposes a new approach based on the electrospray technique to print polyamide thin-film composite membranes in a single scan. The study found that a substrate with a 4-hour polydopamine coating and a cone-jet spray at 2.5 cm spray distance showed the highest NaCl rejection at 98.1%.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Hao Liu, Bo Li, Pin Zhao, Rongming Xu, Chuyang Y. Tang, Weilong Song, Zunaira Habib, Xinhua Wang
Summary: This study designed an interlayered thin-film composite forward osmosis membrane with an ultrathin and porous interlayer, which enhanced water permeability and reduced reverse sodium flux. The membrane maintained high stability and permeability under high salinity and contaminated environment.
CHINESE CHEMICAL LETTERS
(2023)
Article
Engineering, Chemical
Jiuyang Lin, Xu Dan, Jing Wang, Sisi Huang, Lihai Fan, Ming Xie, Shuaifei Zhao, Xiaocheng Lin
Summary: This study presents in-situ cross-linked porous anion exchange membranes (AEMs) with tunable microstructures and high diffusion dialysis (DD) performance for acid recovery. The prepared AEMs exhibit significantly superior DD performance due to the high free volume and cross-linked networks within the membranes. The optimized AEM shows 2.6 times higher acid dialysis coefficient (UH+) and 255.4 times higher acid/salt separation factor (S) compared to the commercial DF-120 AEM. Therefore, these low-cost, high-performance in-situ cross-linked porous AEMs can potentially contribute to large-scale acid recovery applications.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Zhu Xiong, Qiaoyun Lai, Jiangyan Lu, Fangshu Qu, Huarong Yu, Xiongbo Chen, Gaosheng Zhang, Wei Zhang, Shuaifei Zhao
Summary: A superhydrophobic PTFE membrane with low surface energy and high antiwetting and antifouling properties was fabricated through surface silanization and fluorination. The membrane exhibited small pore size and high penetrating pressure, and showed excellent stability and performance in treating challenging waste liquids. This study provides an important strategy for developing superhydrophobic membranes with simultaneously antiwetting and antifouling properties.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Environmental
Junxia Liu, Wei Fu, Xuri Yu, Haiyan Yang, Dongsheng Zhao, Zhihong Wang, Lin Wang, Xianhui Li, Chuyang Y. Tang
Summary: In membrane technology for water/wastewater treatment, the concepts of critical flux (J(C)) and limiting flux (J(L)) play important roles in stable flux duration. This study clarifies the relationship of J(C) and J(L) to metastable and long-term stable fluxes based on factors such as initial flux, energy barriers, and membrane characteristics. The results provide significant guidelines for fouling control strategies in the field of membrane design and operation optimization.
Article
Chemistry, Physical
Lei Han, Liguo Shen, Hongjun Lin, Tinghai Cheng, Jianming Wen, Qianqian Zeng, Yanchao Xu, Renjie Li, Meijia Zhang, Huachang Hong, Chuyang Tang, Zhong Lin Wang
Summary: This study developed an eco-friendly acrylonitrile-butadiene-styrene (ABS) membrane using three-dimensional (3D) printing technology and modified it through an eco-friendly plasma strategy. The modified membrane exhibited excellent hydrophilicity and oleophobicity, achieving a water contact angle of 8.8 degrees and underwater oil contact angle of 137.6 degrees. The membrane showed an ultra-high flux of 1.17 x 10(5) L·m(-2)·h(-1) with 99.60% rejection for five typical oil/water systems, and maintained a rejection rate of 99.40% after 100 cycling tests over a four-month period, demonstrating superior stability and recyclability. This membrane outperformed all the state-of-the-art membranes for oil/water separation and introduced a new approach for membrane fabrication.
Article
Engineering, Biomedical
Jingdong Rao, Xiaohui Mou, Yongyi Mo, Ho-Pan Bei, Li Wang, Chuyang Y. Tang, Kai-Hang Yiu, Zhilu Yang, Xin Zhao
Summary: Stenting is the primary treatment for vascular obstruction-related cardiovascular diseases, but it causes endothelial injury. The DA-Cu-Arg-Hep coating can effectively reconstruct the damaged endothelium and prevent thrombosis and restenosis.
Article
Engineering, Environmental
Qianqian Zeng, Die Ling Zhao, Liguo Shen, Hongjun Lin, Ning Kong, Lei Han, Cheng Chen, Jiaheng Teng, Chuyang Tang, Tai-Shung Chung
Summary: This study inserted titanium oxide nanotubes into the interlayer space of 2D MXene-based membranes to prepare PMT membranes with excellent performance. The PMT membrane has outstanding hydrophilicity, high retention rates, and ultra-high permeability. It also exhibits excellent antifouling and self-cleaning properties. The incorporation of TiONT increased the interaction energy between the membrane and pollutants, thereby improving its antifouling performance. This novel 2D membrane shows great promise for large-scale continuous separations of oil/water emulsions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Zhiwen Li, Yanchao Xu, Liguo Shen, Renjie Li, Yang Jiao, Hongjun Lin, Chuyang Y. Tang
Summary: In this study, a nano-wrinkled polyamide membrane with ultrathin thickness was fabricated on a heterogeneous surface using a heterogeneous surface regulated interfacial polymerization approach. The presence of the heterogeneous surface induced the formation of aqueous phase microphases under the organic phase, which served as a template for the formation of the polyamide film. The polyamide membrane obtained exhibited excellent water permeance and sodium sulfate rejection.
Article
Engineering, Environmental
Yukun Qian, Haozheng Li, Jiancong Lu, Dan Lu, Hongyu Jin, Zhiyi Xia, Zhikan Yao, Jing Wang, Lin Zhang, Chuyang Y. Tang
Summary: By regulating the pore size and surface chemical composition of the substrate, the intrusion of polyamide can be effectively inhibited, leading to improved performance of thin film composite polyamide nanofiltration membranes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Wenyuan Ye, Mingqiu Hong, Xuan Huang, Tianci Chen, Ailiang Gu, Xiaocheng Lin, Xuewei Li, Xiangrong Chen, Dong Han Seo, Shuaifei Zhao, Xueming Chen, Bart van der Bruggen, Ming Xie, Jiuyang Lin
Summary: Under the concept of environmental sustainability, landfill leachate concentrate can be used as a valuable resource. The electro-neutral nanofiltration membrane designed in this study achieved a high retention of humate (96.54%) with a low salt rejection (3.47%), outperforming state-of-the-art membranes and showing promise in fractionation of humate and inorganic salts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Riyadh Al-Attabi, Fenghua She, Shuaifei Zhao, Ludovic F. Dumee, Jurg A. Schutz, Weihong Xing, Zhaoxiang Zhong, Lingxue Kong
Summary: Electrospinning was used to synthesize nanofiber membranes from polyvinylidene fluoride (PVDF) for separating airborne contaminants. By optimizing the electrospinning process, scalable and comfortable PVDF nanofiber membranes with high filtration efficiency were achieved. Compared to commercial surgical face masks, the PVDF nanofiber membranes had smaller fiber diameter, higher mechanical strength, and better filtration efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Chunyi Sun, Bin Lin, Xiangyong Zheng, Yingchao Dong, Min Zhao, Chuyang Y. Tang
Summary: In this work, a smooth ceramic-based graphene desalination membrane was developed with enhanced anti-fouling and anti-scaling ability for efficient treatment of hypersaline wastewater. The graphene membrane exhibited stable water flux and high salt rejection during constant operation, attributed to its lower attractive interaction force with foulant, lower surface roughness, and higher affinity with water compared to polypropylene membranes. The membrane also demonstrated promising oil and ions rejection for industrial petrochemical wastewater during long-term operation.
Article
Engineering, Environmental
Li Long, Lu Elfa Peng, Shenghua Zhou, Qimao Gan, Xianhui Li, Jingyi Jiang, Jiarui Han, Xiangru Zhang, Hao Guo, Chuyang Tang
Summary: The presence of disinfection by-products in drinking water poses a serious threat to water safety and public health. Nanofiltration is a promising technique for removing these by-products and producing clean water. We have developed highly selective nanofiltration membranes that can effectively reject disinfection by-products while allowing essential minerals to pass through. These membranes were fabricated using interfacial polymerization with the addition of NaHCO3, which led to improved membrane performance and higher selectivity for minerals over disinfection by-products.
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
