ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Kun Li,Yuxuan Xue,Meng Li,Ammara Arooj,Xuan Zhang
Mass concentration using conventional forward osmosis (FO) membranes has experienced critical issues including membrane fouling and internal concentration polarization effects. In this study, we designed a conductive FO membrane for milk concentration using the proposed electro-FO system. Specifically, the conductive layer, with a thickness of approximately 1 μm, was constructed through in situ polymerization of pyrrole on the surface of a symmetric polyoxadiazole-co-hydrazide FO membrane. This unique structural design promoted an FO membrane (named PPy-PODH) with a high water flux (12.7 L m–2 h–1) and exceptional reverse flux selectivity (115,000 L mol–1), 3 orders of magnitude higher than those of commercial FO membranes. At an external voltage of 2 V, the conductive FO membrane could maintain a substantial operation (water flux maintained at approximately 6 L m–2 h–1), achieving a high concentration factor of 2.6 toward skim milk. Moreover, high flux recovery ratios of >94.3% were obtained for the PPy-PODH membrane in a “concentration-cleaning” loop experiment, in contrast to 55% for the commercial FO membrane. Overall, this study presents a promising strategy to achieve efficient mass concentration using conductive FO membranes coupled with an electro-FO system.
研究领域:
食品科学
·
膜技术
·
生物工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Ziqiang Tong,Hongyu Guo,Xiufeng Liu,Baoquan Zhang
Graphene oxide (GO) membranes with GO sheets of different sizes were prepared on porous nylon substrates. X-ray diffraction and Fourier transform infrared spectroscopy were employed to explore the size effect of GO sheets on the microstructure of GO membranes. Field emission scanning electron microscopy was utilized to observe the membrane morphology and thickness. The effects of GO sheets, membrane thickness, draw solution concentration, and solvent parameters on organic solvent forward osmosis (OSFO) performances were studied in methanol solution. Using pure methanol as the feed solution and 1 M citric acid methanol solution as the draw solution, a 240 nm thick highly laminated GO (HLGO) membrane achieves 4.18 L m–2 h–1 methanol flux with a moderate reverse solute flux. In the enrichment of target products via the OSFO of HLGO membranes, model solutes and atorvastatin calcium were, respectively, employed as target molecules. The solutions containing target products could be successfully concentrated with high solvent fluxes and ideal rejection rates.
研究领域:
材料科学
·
化学工程
·
分离技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2018
·Vol. 25
·期 7
·1-8
·
IF 1.434
Song Hai-ming,Zhu Li-jing,Zeng Zhi-xiang,Xue Qun-ji
Cellulose acetate (CA) is a low cost and readily available material widely used in forward osmosis (FO) membranes. However, the performance of pure CA membranes is not good enough in salt separation and the traditional modification methods are generally multistep and difficult to control. In this paper, we reported high performance cellulose acetate (CA) composite forward osmosis (FO) membranes modified with polyvinyl alcohol (PVA) and polydopamine (PDA). PVA was first cross-linked onto the surface of CA membranes, and then PDA was coated with a rapid deposition method. The membranes were characterized with respect to membrane chemistry (FTIR and XPS), surface properties comprising wettability (by water contact angle), and osmosis performance. The modified membrane coated by PVA and PDA shown better hydrophilicity and exhibited 16.72 LMH osmotic water flux and 0.14 mMH reverse solute flux with DI water as feed solution and 2.0 M NaCl as draw solution and active layer facing the feed solution. This simple and highly effective modification method makes it as an excellent candidate for further exploration for FO.
研究领域:
材料科学
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化学工程
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Tong Li,Caixia Cheng,Kaifeng Zhang,Jie Yang,Guangshuo Han,Xiuju Wang,Zhongpeng Wang,Liguo Wang
In this paper, the hydrophilic UiO-66-NH2 nanomaterial was synthesized by the solvent-thermal method and characterized. Then, UiO-66-NH2 was introduced into the casting membrane solution of cellulose acetate (CA) forward osmosis (FO) membrane, and CA/UiO-66-NH2 forward osmosis membrane was prepared by the phase inversion method. The optimum preparation conditions of CA/UiO-66-NH2 mixed matrix membranes were determined as follows: the content of UiO-66-NH2 was 0.4 wt%, the coagulation bath temperature was 35°C, the mixing temperature was 50°C and the heat treatment temperature was 50°C. FTIR, SEM, water contact angle and AFM were carried out on CA/UiO-66-NH2 forward osmosis membrane prepared under the best preparation conditions. Compared to the CA forward osmosis membrane, the permeability and selectivity of the CA/UiO-66-NH2 membrane were improved. The water flux and reverse salt flux of the CA/UiO-66-NH2 forward osmosis membrane reached 52.32 L/(m2·h) and 2.43 g/(m2·h), respectively. The permeability selectivity of CA membranes and CA/UiO-66-NH2 membranes did not change much during 180 min, indicating that the two membranes had good long-term stability. This study shows a potential advantage of UiO-66-NH2 as additives for improvement in the desalination performance of forward osmosis membranes.
研究领域:
材料科学
·
环境工程
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Lei Wu,Xiaolu Gong,Cong Ma,Lan Xu,Ming Li,Chen Lyu,Nan Sun
In this study, hydrogels generated by the Schiff base reaction between citral and chitosan (CS) were used for the first time to improve the anti-bacterial property of forward osmosis (FO) membranes. The composite membranes were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR), Water contact angle (WCA), Zeta potential and confocal laser scanning microscopic (CLSM). In the FO filtration experiment, the membrane performance of TFC-1 with 1 M sodium chloride solution as the draw solution and deionized water as the feed solution was the best, with the water flux of 25.54 ± 0.7 L m −2 h −1 and the reverse salt flux of 4.7 ± 0.4 g m −2 h −1 . Although the hydrogel coating produced a certain hydraulic resistance, the flux of the modified membrane was only reduced by about 8%, compared with the unmodified membrane. However, the anti-bacterial property ( Pseudomonas aeruginosa ) and anti-fouling properties (bovine serum protein and lysozyme protein) of the modified membranes were improved, showing good antibacterial properties (99%) and flux recovery rate (over 90%). The modified method has the advantages of easy access to raw materials, simple operation and no risk of secondary pollution, which can effectively reduce the cost of chemical cleaning and extend the service life of the membrane. The modification of membrane by chitosan-based hydrogel is a promising option in the field of membrane anti-bacteria.
研究领域:
材料科学
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膜科学与技术
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生物医学工程
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环境功能材料
·
抗菌材料
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuzhe Zhou,Yanmei Ma,Xiangyun Li,Wentao Yan,Yong Zhou,Congjie Gao
The co-solvent-assisted interfacial polymerization (CAIP) strategy has proven to be an effective method for fabricating high-performance forward osmosis (FO) membranes. However, current research primarily focuses on the role of co-solvents in conventional interfacial polymerization (IP) technology, with relatively limited studies on unconventional IP technologies. This study explores support-free interfacial polymerization (SFIP) by incorporating dimethyl sulfoxide (DMSO) as a co-solvent. The impact of DMSO on polyamide (PA) structure and membrane performance is systematically investigated throughout the SFIP process. At a DMSO concentration of 1.5 w/v%, SFIP-D1.5 membrane exhibited a high water flux of 29 LMH without a significant increase in reverse salt flux. This phenomenon can be attributed to the dual role of DMSO in promoting monomer diffusion and inducing swelling of the SFIP-PA film. Furthermore, the SFIP-D1.5 membrane exhibited stable performance over 24 h operation and maintained comparable anti-fouling properties during multi-cycle fouling tests. This study reveals the distinct behavior of DMSO in the SFIP process compared to conventional IP, and demonstrates the potential of the CAIP strategy within unconventional IP techniques. This provides a promising approach to enhance both the selectivity and permeability of TFC FO membranes fabricated using strong solvents as co-solvents.
研究领域:
膜科学
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化学工程
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材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Bohao Cheng,Yifan Wang,Xiaowen Wu,Minghao Fang,Xin Min,Zhaohui Huang,Yan'gai Liu,Ruiyu Mi
In this study, the electrospun polyacrylonitrile (ePAN) fiber mats were used as support layer and natural mineral-halloysite nanotubes (HNTs) was used to construct the interlayer. Polydopamine modification was utilized to enhance the hydrophilicity of ePAN substrates and dispersibility of HNTs. The mHNTs interlayer effectively minified the surface pore size of substrates providing a better interface for interfacial polymerization forming an integrated and thin PA selective layers. Compared to the unmodified membranes, the water flux of the optimized membrane with mHNTs interlayer about 61.60% and 79.70% higher and the reverse salt flux of which was 38.95% and 45.08% lower in AL-FS mode and AL-DS mode respectively. These results suggested that introducing halloysite nanotube interlayer is an effective, and low-cost way to fabricate high-performance FO 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
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Hong-Tao Wang,Lei Ma,Dong Zhu,Jing Ding,Gang Li,Bing-Jie Jin,Yuan-Hu Shao,Wei-Xin Zhang,Meng-Ya Song,Sheng-Lei Fu
The growing contamination of arsenic and plastics has severely effects on the soil fauna health, including shifts of gut microbiota community. A few studies have focused on effects of microplastics and metal(loid) in soil and fauna gut microbiome. However, the environmental effect of nanoplastics and arsenic on the earthworm gut microbiota, especially on arsenic biotransformation in the gut, remain largely unknown. Here, a microcosm study was performed to explore the effects of nanoplastics and arsenic on the microbiota characteristics in earthworm Metaphire vulgaris gut using Illumina high throughput sequencing, and to investigate changes in the gut microbiota-mediated arsenic biotransformation genes (ABGs) by using high-throughput quantitative PCR. Our results demonstrated that the concentration of arsenic in the earthworm body tissues after exposure to arsenic and nanoplastics was significantly lower from that with arsenic alone exposure. Moreover, the clearly different bacterial community was observed in the soil compared with the earthworm gut, which was dominated by Proteobacteria, Actinobacteria, and Firmicutes at phylum level. Arsenic exposure significantly disturbed bacterial community structure in the earthworm gut, but exposure to nanoplastics did not induce gut microbiota changes. More interestingly, nanoplastics can relieve adverse effect of arsenic on the gut microbiota possibly by adsorbing arsenic. In addition, a total of 16 ABGs were detected, and predominant genes involved in arsenic reduction and transport process were observed in the earthworm guts. In short, this study provides a new picture of the effects of nanoplastics and arsenic on the gut microbiota and arsenic biotransformation in soil fauna gut.
研究领域:
环境科学
·
微生物学
·
土壤生态学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Mingchuan Yu,Hanmin Zhang,Fenglin Yang
In forward osmosis (FO), draw solution is a critical problem which restricts the progress and application of FO technology. The study of an optimal draw solution is essential in the application of the FO technology. In this paper, a mild one-pot method was used to synthesize a ferric-lactate (LAFe) complex, which had a good performance of high osmotic pressure, moderate viscosity and high solubility, as a potential draw solute. Then, the properties of the LAFe complex in FO were systematically studied. The water flux was improved to 18.78 ± 1.56 L m −2 h −1 (LMH) at 1 M LAFe, which was 1.8 times than that of 1 M NaCl. And, the reverse salt flux of the 1 M LAFe (1.00 ± 0.09 g m −2 h −1 ) obviously was diminishing, only 1/4 of the 1 M NaCl. Furthermore, in the application test, 1 M LAFe exhibited the water flux of 7.54 LMH (in the first hour) when the seawater of Huanghai coast was used as the feed solution. The recovery of the LAFe was employed successfully by a nanofiltration method, achieving a high efficiency of 96%.
研究领域:
化学工程
·
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
·
2021
·
IF 7.312
Han Feng,Jun Liu,Yongfeng Mu,Nan Lu,Shuling Zhang,Mei Zhang,Jiashuang Luan,Guibin Wang
Metal organic frameworks (MOFs) have raised considerable interest because of their favorable impacts on the performance of water treatment membranes. Herein, the novel nanocomposite based on both nanoporous MOFs and hydrophilic carbon quantum dots (CQDs) was exploited as a novel dopant for the fabrication of PES ultrafiltration (UF) membranes. CQDs were synthesized via pyrolysis of citric acid, and UiO-66-NH 2 @CQDs were synthesized via the condensation reactions of CQDs and UiO-66-NH 2 using EDC and NHS as the condensating agents. The properties of resulting membranes on the porosity, membrane morphology, hydrophilicity, permeability and anti-fouling performance were adequately investigated. The membranes incorporated with UiO-66-NH 2 @CQDs exhibited significantly improved water flux (up to 358.5 Lm −2 h −1 ), which was ~1.82 times that of pristine PES membrane. Additionally, the BSA rejections rates for the hybrid membranes were all maintained above 95.0%. Furthermore, the hybrid membranes exhibited enhanced anti-fouling performance and the highest flux recovery ratio ( FRR ) of the hybrid membrane with 0.5% UiO-66-NH 2 @CQDs reached 77.6%. The membranes incorporated with UiO-66-NH 2 @CQDs exhibited better permeability and anti-fouling performance than those incorporated with CQDs or UiO-66-NH 2 . This work reveals that the novel hydrophilic nanofillers combining CQDs and MOFs exhibit great potential for application in water treatment membranes.
研究领域:
材料科学
·
环境工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2019
·Vol. 24
·期 8
·1593
·
IF 3.06
Xin-Jun Yu,Chang-Yi Huang,Hong Chen,Dong-Sheng Wang,Jing-Liang Chen,Hui-Juan Li,Xiao-Yan Liu,Zhao Wang,Jie Sun,Zhi-Peng Wang
The traditional biochemical methods for analyzing cellular composition of oleaginous microorganisms are time-consuming, polluting, and expensive. In the present study, an FT-IR method was used to analyze the cellular composition of the marine oleaginous protistAurantiochytriumsp. during various research processes, such as strains screening, medium optimization, and fermentation, and was evaluated as a green, low-cost, high throughput, and accurate method compared with the traditional methods. A total of 109Aurantiochytriumsp. strains were screened for lipid and carbohydrate production and the best results were found for the strains No. 6 and No. 32. The yields and productivities could reach up to 47.2 g/L and 0.72 g/L/h for lipid, 21.6 g/L and 0.33 g/L/h for docosahexaenoic acid (DHA) in the strain No. 6, and 15.4 g/L and 0.18 g/L/h for carbohydrate in the strain No. 32, under the optimal conditions, respectively. These results confirmed potentials of the twoAurantiochytriumsp. strains for lipid, DHA, and carbohydrate productions at industrial scales. The FT-IR method in this study will facilitate research on the oleaginousAurantiochytriumsp., and the obtained two strains for lipid and carbohydrate productions will provide the foundations for their applications in medical, food, and feed industries.Keywords:Aurantiochytriumsp., carbohydrate;DHA;feed;FT-IR;high-throughput
研究领域:
生物技术
·
海洋生物学
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 3
·1057
·
IF 4.927
Kaiyun Fu,Yunzhao Guo,Wenbo Qi,Xianfu Chen,Minghui Qiu,Yiqun Fan
Ceramic membranes have the advantages of high mechanical strength and thermal stability and are promising candidates for membrane distillation. Ceramic membranes are generally designed to have a multilayer structure with different pore sizes to create a high liquid entry pressure and obtain a high permeability. However, these structural characteristics pose significant difficulties in predicting permeate flux in a ceramic membrane contactor for vacuum membrane distillation (VMD). Here, a modeling approach was developed to simulate the VMD process and verified by comparing the simulated results with the experimental data. Furthermore, correlations are proposed to simplify the calculations of permeate flux for VMD using asymmetric ceramic membranes by assuming those multilayers to be an effectively quasi-symmetric layer and by introducing a correction factor. The simulation results indicated that this simplified correlation was effective and enabled a quick estimation of the effect of membrane parameters on permeate flux.Keywords:ceramic membrane;vacuum membrane distillation;permeate flux;modeling
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）