DESALINATION
·
2016
·
IF 4.412
Pengli Chen,Xiao Ma,Zhaoxiang Zhong,Feng Zhang,Weihong Xing,Yiqun Fan
Removing mixture salts from dye solutions using membrane technology still need to be improved for high dye rejection and low salt rejection. In this work, ceramic membrane with pore size of 1.5 nm presented a satisfactory desalination of dye solutions containing NaCl and Na 2 SO 4 compared with two commercial organic nanofiltration membrane elements (DK and DL). Effect of salt content, salt type, molar ratio of NaCl and Na 2 SO 4 , dye concentration and pH on performance of ceramic membrane for desalination of Eriochrome black T (EBT) were investigated. The results showed that dye rejection decreased by increasing salt content, dye concentration and solution pH. Compared with dye-NaCl solutions, a relative high flux and low rejection of dye were observed when treating dye-Na 2 SO 4 solutions. For the mixture salt-dye solutions, the flux, which was higher than that for the single salt-dye solutions, first increased then decreased with decreasing C NaCl /C Na2SO4 due to the change of structure of cake layer. Supper-molecule aggregates of EBT formed by hydrogen-bond is mainly responsible for the high rejection of EBT (> 99%) at acid conditions. The rejection of NaCl and Na 2 SO 4 was below 20% and 40%, respectively. These promising results demonstrates that the new ceramic membrane has a potential application in dye purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Xuewu Zhu,Zhongyue Sun,Fengxun Tan,Jianjun Zhu,Feiyong Chen,Sisi Xu,Daoji Wu,Daliang Xu,Heng Liang,Xiaoxiang Cheng
Polyester (PE) membranes with outstanding permeance and efficient dye desalination performance have become ideal for resource recovery from dye wastewater. However, further improving the performance of PE membranes remains challenging. Herein, a novel high-performance PE loose nanofiltration (LNF) membrane was fabricated via interfacial polymerization, in which nontoxic, rich in hydroxyl, large size, inexpensive, low reactivity, and biodegradable xylitol (XL) was utilized to fabricate PE films. The newly formed XL-based membrane had a hydrophilic, negatively charged, smooth, loose, and thin selective layer. The membrane was optimized by controlling the XL concentrations in the aqueous phase (0.5–2.5 wt%). The optimized membrane (XL-1.5/TMC) exhibited unprecedented water permeance (97.6 L m −2 h −1 bar −1 ) and satisfactory dye desalination performance (Congo red/Na 2 SO 4 selectivity of 259). In addition, the XL-1.5/TMC membrane showed outstanding antifouling performance and stability, which showed great potential for the large-scale application of XL-based membranes. Therefore, this new strategy for the fabrication of PE LNF membranes featuring superior performance using XL was proposed to facilitate resource recovery from dye wastewater.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2021
·Vol. 11
·期 9
·699
·
IF 4.106
Shuai Liu,Xiaofeng Fang,Mengmeng Lou,Yihan Qi,Ruo Li,Gang Chen,Yonglian Li,Yanbiao Liu,Fang Li
The effective separation of dyes and inorganic salts is highly desirable for recycling inorganic salts and water resource in printing and dyeing wastewater treatment. In this work, tannic acid (TA) and polyethyleneimine (PEI) were grafted on the PES/Fe ultrafiltration membrane via the coordination assembly and Michael addition strategy to fabricated a loose nanofiltration membrane (LNM). The effect of PEI concentration on membrane morphologies and properties was systematically investigated. The membrane surface becomes more hydrophilic and transforms into positive charge after the PEI grafting. The optimized PES/Fe-TA-PEI membrane possesses high pure water flux (124.6 L·m−2·h−1) and excellent dye rejections (98.5%, 99.8%, 98.4%, and 86.4% for Congo red, Eriochrome black T, Alcian blue 8GX, and Bromophenol blue, respectively) under 2 bar operation pressure. Meanwhile, the LNM showed a high Alcian blue 8GX rejection (>98.4%) and low NaCl rejection (<5.3%) for the dye/salt mixed solutions separation. Moreover, the PES/Fe-TA-PEI LNM exhibited good antifouling performance and long-term performance stability. These results reveal that such LNM shows great potential for effective fractionation of dyes and salts and recycling of textile wastewater.Keywords:loose nanofiltration;dye desalination;polyphenol;polyethyleneimine;grafting
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Xiao-lei Wang,Wei Qin,Li-xin Wang,Kong-yin Zhao,Hui-cai Wang,Hong-yu Liu,Jun-fu Wei
In order to recover dyes from textile wastewater, a self-supported carboxylated titanium dioxide/calcium alginate (TiO 2 -COOH/CaAlg) hydrogel nanofiltration membrane was prepared using TiO 2 -COOH as the reinforcing agent. The Scanning electron microscopy (SEM) and Energy dispersive X-ray (EDX) mapping scanning spectra were employed to characterize the distribution of TiO 2 -COOH nanoparticles on the membrane surface. The pore size distribution, zeta potential and mechanical performance of the membrane were evaluated. The rejections for single dye solutions, salt solutions and dye/salt mixture solutions were also examined. The results indicate that the TiO 2 -COOH nanoparticles are dispersed uniformly on the membrane surface. Compared to CaAlg membrane, the tensile strength of 20 wt% TiO 2 -COOH/CaAlg membrane is enhanced by 328%. At the operating pressure of 0.1 MPa, the rejection ratios of 20 wt% TiO 2 -COOH/CaAlg membrane for 100 mg/L Brilliant blue G250, Direct black 38 and Congo red are 98.4%, 96.8% and 95.9% respectively, and the permeate flux is about 14.1 L·m −2 ·h −1 . Meanwhile, this membrane possesses the low rejection ratios for inorganic salts (16.1%, 15.6%, 12.3% and 9.0% for MgSO 4 , Na 2 SO 4 , MgCl 2 and NaCl, respectively), excellent dye anti-fouling property and good stability in the long-term filtration for dye/salt mixture solution.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2014
·
IF 4.908
Xipeng Li,Yingbo Chen,Xiaoyu Hu,Yufeng Zhang,Linjia Hu
Novel poly(vinyl alcohol) (PVA)/poly(vinylidene fluoride) (PVDF) hollow fiber composite membranes modified with nano-TiO 2 were prepared by a dip-coating method and they are suitable to be utilized in dye desalination and wastewater treatment . Glutaraldehyde (GA) was used as a cross-linker for the composite polymer membrane in order to enhance the chemical, thermal as well as mechanical stabilities. The surface morphologies and chemical structures of modified membranes were observed by scanning electronic microscopy (SEM), energy dispersive spectroscopy (EDS) and FTIR spectroscopy . Zeta potential of the membrane surface was used to analyze the membrane separation performance. Separation efficiency of dye and salts through novel PVA/PVDF composite membrane was dramatically influenced by dye concentration, salts concentration, pH and temperature of feed solution. Fouling and thermal stability of the membrane were also evaluated with CR, NaCl, and Na 2 SO 4 as model compounds. The separation datas showed that the 1 g/L nano-TiO 2 modified membrane presented highest performance in terms of the rejections to CR, MO, and MB being 94±2.57%, 52.1±2.45%, and 92±2.20%, respectively. And all the PVA composite membranes had no rejection to salts (NaCl, Na 2 SO 4 ). Compared with PVA composite membrane, the PVA composite membrane modified with nano-TiO 2 has higher separation efficiency, antifouling and thermal stability.
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2020
·
IF 7.098
Jiao-Jiao Han,Qiu-Yue Zhang,Min-Yue Huang,Yan Chen,Xi Yan,Wan-Zhong Lang
Two-dimensional (2D) membranes have been widely used in water purification due to their excellent separation performance. Herein, 2D WS 2 membranes were constructed on polyamide (PA) and anodic aluminum oxide (AAO) substrates for efficient dye desalination . Different with previous reports, we discovered that the dry PA supported WS 2 (WS 2 /PA) membrane still permitted water to pass through, relating to the rougher surface of PA than that of AAO, which formed more larger interlayer spacing of 1.18 nm in the WS 2 /PA membrane. Moreover, the WS 2 /PA membrane had a higher water permeance and a lower salt rejection compared with that of AAO supported WS 2 (WS 2 /AAO) membrane with similar dye rejection, and a water permeance of 597 L/m 2 ·h·bar was achieved through a 250 nm-thick WS 2 /PA membrane with a Rose Bengal (RosB) rejection of 98.5% and a NaCl rejection of 0.3%. And this water permeance is approximately one order of magnitude higher than that through reduced graphene oxide membranes in a solvation state (S-rGO) with similar dye and salt rejections, indicating their promising prospect in the application of dye desalination.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Haoran Wang,Chenyu Lai,Yujie Wang,Zhou Qu,Hongwei Fan,Hong Meng
Polyamide (PA) thin-film composite membrane has been widely used in water/wastewater treatment, but construction of such membrane on a three-dimensional inorganic macroporous support remains a challenge, thus limiting the further application under harsh conditions. Herein, we propose a skyloft-like PA membrane on a commercial tubular ceramic macrofiltration support. This membrane built on stilts comprises an ultrathin PA canopy of ∼ 33 nm and pillars (∼1 μm-thick) of vertically aligned CoAl-layered double hydroxide (LDH) nanosheets and covalent organic framework (COF) nanospheres. The prepared PA/OH-COF/F-COF/LDH membrane shows a high water permeance of up to 736.6 L m -2 h −1 MPa −1 together with a satisfactory rejection rate of > 90 % for various small molecules including dyes and antibiotics (> ∼1 nm). The resultant membrane also demonstrates a good dye desalination performance (with a selectivity of up to 197), illustrating an outstanding permselectivty. A long-term and continuous cross-flow nanofiltration indicates a robust stability of the membrane.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Bingzhi Yi,Lulu Liu,Huibiao He,Sanchuan Yu,Doufeng Wu,Congjie Gao
In response to the critical challenge of managing dye wastewater in the textile industry, this research presents an economically viable modification approach to enhance the dye/salt separation efficacy and operational stability of polyamide (PA) based nanofiltration membranes. By incorporating diethanolamine (DEA) as piperazine-aqueous phase additive and polyquaternium-10 (PQ-10) as surface modifier, this technique significantly optimized the properties of loose nanofiltration membranes. Structural modifications resulted in a significant reduction in surface zeta potential at pH 7.0, from −28.9 mV to −2.0 mV, expanded the molecular weight cut-off (MWCO) and most probable pore radius from 360 to 2340 Da and 0.28 to 0.64 nm, respectively. These changes led to high water permeability of 420.4 L·m −2 ·h −1 ·MPa −1 and much low sodium sulfate (Na 2 SO 4 ) rejection of 10.3 %, while maintaining a 98.9 % rejection for dye Congo red (CR). Long-term operational tests demonstrated stable rejection of approximately 98 % for CR and 11 % for Na 2 SO 4 over 50.0 h, affirming the high separation efficiency and good durability of membranes. This enhancement in dye/Na 2 SO 4 separation not only optimizes the balance between permeability and selectivity but also shows significant potential for scaling to industrial applications. The findings provide a robust strategy for addressing critical demands in wastewater treatment within the industry.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Yi Fang Mi,Na Wang,Qi Qi,Bang Yu,Xiang Dong Peng,Zhi Hai Cao
It is crucial for fractionating dye/salt mixture in dyeing wastewater treatment. Herein, a polyamide nanofiltration (NF) membrane (PEA-TMC) for high efficient dye desalination was prepared through polyether amine (PEA) and trimesoyl chloride interfacial polymerization. Due to the large molecular size and hydrophilicity of PEA, the resulting NF membrane possessed a relatively loose membrane structure and good hydrophilicity, which improved membrane water flux and dye desalination performance. The influences of PEA concentration and reaction time on the NF performance were systematically investigated. Under the optimal conditions, the membrane exhibited a high water flux of 66.4 L m -2 h −1 at low operating pressure (0.4 MPa), and showed a high methyl blue rejection (95.4%) and low NaCl rejection (16.4%) when nanofiltrated methyl blue/ NaCl mixture solution. Moreover, PEA-TMC membrane exhibited good stability in continuous operation and antifouling performance. These results disclosed the promising applications of PEA-TMC membrane in dye/salt separation process.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Huimin Ruan,Changmeng Guo,Hongwei Yu,Jiangnan Shen,Congjie Gao,Arcadio Sotto,Bart Van der Bruggen
This study reports the fabrication of mixed matrix membranes (MMMs) using immersion precipitation phase inversion for promising application in desalination of dye solutions. Aromatic poly(m-phenylene isophthalamide) is used as the polymer material, and the metal–organic framework MIL-53(Al) is added to develop integrally skinned asymmetric membranes. Successful dispersion of MIL-53(Al) particles into the membrane-separating layer is confirmed by scanning electron microscopy. The optimum performance of the membranes is obtained at 0.5 wt % MIL-53(Al) concentration. In particular, the M-0.5 membrane is planned for use in separating dye/salt aqueous mixtures. It is observed that the M-0.5 membrane has a rejection for NaCl and Na2SO4 below 11% and 37%, respectively, in mixed salt/dye solutions. Additionally, the M-0.5 membrane is found to have a rejection rate of 83.9%, 98.3%, and 99.8% for nitroso-R salt, xylenol orange, and ponceau S, respectively, in mixed Na2SO4/dye solutions. The rejection rate for Na2SO4 is lower than that of some commercial nanofiltration membranes (NF90, NF270, and DK). The membrane is promising for dye desalination in industrial-scale applications.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Jing Dou,Shuo Han,Saisai Lin,Zhifu Qi,Feipeng Huang,Xiangdong Feng,Zhikan Yao,Jing Wang,Lin Zhang
Nanofiltration is a promising technology to recover dye from textile wastewater with highly saline for sustainable resource recovery. However, it is difficult for the conventional piperazine-based nanofiltration membranes, which usually have a tight polyamide matrix structure, to precisely separate dye and salt in wastewater. In this study, 5,5,6’,6’-tetrahydroxy-3,3,3’,3’-tetramethyl spirobisindane (TTSBI) with rigidly contorted structure has been used instead of piperazine as aqueous-phase monomer to fabricate polyarylate (PAT) nanofiltration membranes with quasi-PIMs structure via interfacial polymerization (IP) with three types of acyl chloride, i.e., rigid trimesoyl chloride (TMC), short-chain glutaryl chloride (GC) and long-chain sebacoyl dichloride (SDC). The contorted structure of TTSBI introduces extra microporosity in nanofiltration membranes, and the differentia of three acyl chlorides in molecular flexibility further endows with tailoring the stacking density of as-formed PAT networks. The PAT NF membranes thereby exhibited high permeability and tunable size-selectivity in desalination from dye effluent. Among these PAT membranes, TTSBI-TMC membranes had the highest water flux of 480.5 LMH, nearly 7-fold increase compared traditional PA NF membranes, whereas TTSBI-SDC membranes had the highest dye rejection of 97.4%, and TTSBI-GC membrane had the relatively balanced dye desalination performance with high rejection 95.4% for Congo Red and 8.3% for NaCl accompanied by high flux of 402.4 LMH. Therefore, this study provides a new prospective for the fabrication of highly permeable nanofiltration membranes for precise separation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 15
·2200
·
IF 4.7
Na Meng,Xin Sun,Jinxin Liu,Jialing Mi,Xuan Chen,Rong Rong
In response to the phenomenon of interlayer transport channel swelling caused by the hydration of oxygen-containing functional groups on the GO membrane surface, a moderate heat treatment method was employed to controllably reduce the graphene oxide (GO) membrane and prepare a reduced GO composite nanofiltration membrane (mixed cellulose membrane (MCE)/ethylenediamine (EDA)/reduced GO-X (RGO-X)). The associations of different heat treatment temperatures with the hydrophilicity, interlayer structure, permeability and dye/salt rejection properties of GO membranes were systematically explored. The results indicated that the oxygen-containing groups of the GO membrane were partially eliminated after heat treatment, and the hydrophilicity was weakened. This effectively weakened the hydration between the GO membrane and the water molecules and inhibited the swelling of the oxidized graphene membrane. In the dye desalination test, the MCE/EDA/RGO membrane exhibited an ultra-high rejection rate of over 97% for methylene blue (MB) dye molecules. In addition, heat treatment increased the structural defects of the GO membrane and promoted the fast passage of water molecules via the membrane. In pure water flux testing, the water flux of the membrane remained above 46.58 Lm−2h−1bar−1, while the salt rejection rate was relatively low.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）