Toxics
·
2023
·Vol. 11
·期 10
·860
·
IF 4.6
Yi Lu,Fangyuan Peng,Yingyang Wang,Haipu Li,Zhaoguang Yang
Antimony (Sb) is a non-essential metalloid that can be taken up by plants from contaminated soils and thus enter the food chain and threaten human health.Boehmeria niveaL. (ramie) is a promising phytoremediation plant for Sb-polluted soils. However, the mechanisms of antimonite (SbIII) and antimonate (SbV) uptake by ramie remain unclear. In this study, a hydroponic system was established to investigate how different substances affect the uptake of SbIII or SbV by ramie, including an energy inhibitor (malonic acid), an aquaglyceroporin inhibitor (silver nitrate), an SbV analog (phosphate—PV), and SbIII analogs (arsenite—AsIII, glycerol, silicic acid—Si, and glucose). The results indicated that ramie primarily transported Sb by increasing the Sb concentration in the bleeding sap, rather than increasing the weight of the bleeding sap. After 16 h of Sb exposure, the absolute amount of transported Sb from the roots to the aboveground parts was 1.90 times higher under SbIII than under SbV. The addition of malonic acid significantly inhibited the uptake of SbV but had limited effects on SbIII, indicating that SbV uptake was energy dependent. PV addition significantly reduced SbV uptake, while the addition of AsIII, glycerol, and Si obviously inhibited SbIII uptake. This suggested that the uptake of SbV might be via low-affinity P transporters and SbIII might use aquaglyceroporins. These findings deepen the understanding of Sb uptake pathways in ramie, contribute to a better comprehension of Sb toxicity mechanisms in ramie, and establish a foundation for identifying the most effective Sb uptake pathways, which could further improve the efficiency of phytoremediation of Sb-polluted soils.Keywords:ramie;antimony;uptake pathway;aquaglyceroporin
研究领域:
植物学
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环境科学
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DOI
PubMed
高影响因子
Evidence-based Complementary and Alternative Medicine
·
2018
·
IF 2.064
Gao Zhen,Wang Jing,Jing Jing,Dan Xu,Li Zheng,Fengsen Li
Objective. In China, the Chinese medicine formula modified zhisou powder (MZP) is commonly used to treat COPD with cold-dryness syndrome (CDSCOPD) to relieve cough and sputum. However, the underlying mechanisms of MZP on treating CDSCOPD remain to be elucidated. Methods. COPD and CDSCOPD rat models were established; MZP was given to CDSCOPD rats in the last 7 days of the 97-day model establishment. Then the rats were subjected to lung function measurement. Pathological changes in lungs were observed through paraffin section and H&E staining. The mRNA and protein levels of AQP1, 4, and 5 and Muc5AC and Muc5B in lung were determined by quantitative RT-PCR and western blotting. NE levels was determined by ELISA. Results. The impaired lung functions were observed in rats exposed to cigarette smoke. Among all parameters evaluating lung functions, only tidal volume demonstrates a further decrease in CDSCOPD when compared with COPD, indicating further impaired pulmonary ventilation functions upon cold-dryness stimulation. The intervention of MZP effectively improved lung functions parameters, prevented the inflammations, and eliminated the increases of AQP4 and 5 and the decrease of Muc5AC in lung. Conclusion. MZP probably improves pulmonary functions in CDSCOPD through inhibiting lung inflammation, increasing expressions of AQPs, and decreasing Muc5AC expression in lung.
研究领域:
药理学
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肺病学
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中医药学
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分子生物学
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DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Shilong Li,Kecheng Guan,Dandan Zhou,Dong Zou,Jian Lu,Wenbo Jiang,Bin Chen,Jian Qiu,Lele Cui,Tianxiang Yu,Yuqing Sun,Zhi Xu,Wanqin Jin,Wenheng Jing
Two-dimensional (2D) material membranes have significant potential for selectively transporting molecules and ions, crucial for environmental and energy applications significantly. However, challenges such as complex pathways and instability due to weak interactions hinder their performance. This study takes 2D MXene (Ti3C2Tx) as a platform and proposes a lattice vacancy-anchored chemical etching method to perforate MXene nanosheets and produce acid cross-linkers simultaneously. The etching process involves H2O2 oxidation consuming Ti atoms from the lattice vacancies of MXene to create peroxo titanic acid (PTA), precisely generating nanopores in the nanosheets for additional transport pathways. At the same time, the produced PTA acts as a cross-linking agent that enhances the interaction between MXene nanosheets to form stabilized interlayer channels. This approach results in multilevel features in the MXene membrane, offering abundant vertical water channels and robust interlayer ion-sieving channels. Consequently, both permeability and selectivity improve nearly 10-fold compared to the pristine membrane, overcoming previous trade-offs. This strategy presents a precise and ingenious method for perforating 2D materials and constructing high-performance mass transport channels of 2D membranes at various levels, benefiting sustainable and highly efficient desalination processes.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Dandan Chen,Qianqian Liang,Feng Gao,Tianyu Liu,Yunqi Wu,Zhuo Zheng,Jian Kang,Ruizhang Xu,Ya Cao,Ming Xiang
Superior permeability and high selectivity are crucial performances criterion for reverse osmosis (RO) membranes. Inspired by aquaporin-based biomimetic membranes, the loose liposomes as artificial water channels were prepared by thin-layer hydration method with lyso -phospholipids (C14lyso) and cholesterol followed by incorporating liposomes into the polyamide selective layer via in situ interfacial polymerization to fabricate liposomes-based RO membranes (TFC-C14lyso). Stopped-flow tests verified that C14lyso liposomes possess fast water transportability and the effect of C14lyso liposomes on the intrinsic structure of the polyamide selective layer was comprehensively explored. Meanwhile, the structure and performance of the TFC-C14lyso membranes could be regulated by varying the liposome concentrations. As a result, TFC-C14lyso-2 (the concentration of C14lyso liposomes is 0.25 mg/mL) presented an optimal separation performance, showing high water permeance of 3.80 L m −2 h −1 bar −1 and NaCl rejection of 98.6 %. Moreover, the separation mechanism regarding the enhanced permeability of TFC-C14lyso-2 was profoundly revealed via the structure and performance comparison with TFC-DOPC fabricated by incorporating dense DOPC liposomes into its PA selective layer. Building on these studies, our work may provide a facile and versatile pathway for designing advanced membranes in desalination.
研究领域:
生物工程
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材料科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Yangyang Mao,Mengchen Zhang,Long Cheng,Jianwei Yuan,Gongping Liu,Libo Huang,Mihail Barboiu,Wanqin Jin
Inspired by fast and selective water transport in natural Aquaporin (AQP), imidazole-quartet water channels (IQWC) constructed by imidazole-ureido (IU) molecular scaffolds, are excellent candidates to design membranes with fast and selective water transport properties. In this work, a water binding IU bola-amphiphile-imidazole compound was embedded with the hydrophilic and laminated graphene oxide (GO) to prepare IU-GO membrane. H NMR, TG, XRD , SEM, AFM and FTIR were conducted to characterize physicochemical properties of IU and IU-GO membrane. It was demonstrated that IU could well interact with GO to generate a robust membrane structure. The resulting IU-GO membranes were applied for pervaporation dehydration of n -butanol-water. The total flux and the separation factor of the optimized IU-GO membrane were 3506 g·m -2 ·h -1 and 4454 respectively when the membrane was measured at 343 K with butanol content of 80 wt%. Furthermore, the membrane exhibited good stability and separation performance during 120 h continuous operation test, showing great potential in application of solvent dehydration.
研究领域:
材料科学
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化学工程
·
膜技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
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IF 9.136
Dandan Chen,Feng Gao,Wanxin Peng,Yuchen Song,Ran Hu,Zhuo Zheng,Jian Kang,Ya Cao,Ming Xiang
Inspired by biological aquaporins, artificial water channels (AWCs) can achieve high-performance for thin-film composite (TFC) reverse osmosis (RO) membranes. In our work, two types of liposomes (C18lyso and D5A liposomes) with superior permeability serving as AWCs were designed by regulating the molecular structures of lipids, in which D5A liposomes have a better ability to water transport water molecules. Herein, liposome-based RO membranes (TFN-C18lyso and TFN-D5A) were fabricated via in situ interfacial polymerizations (IP). The resulting TFN-C18lyso shows an increase in water permeability of ∼ 51.4 % (up to 3.83 L m −2 h −1 bar −1 ) while TFN-D5A displays an increase in water permeability of ∼ 67.2 % (up to 4.23 L m −2 h −1 bar −1 ), and both membranes keep high rejection of ∼ 98.6 %. Moreover, both TFN-C18lyso and TFN-D5A present good separation stability, chemical resistance, and good desalination. Our work provides a valid and versatile foundation for developing advanced biomimetic membranes in water treatment.
研究领域:
材料科学
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环境科学
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生物工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 7
·期 2
·632-638
·
IF 9.931
Shenghua Zhou,Zhu Xiong,Fu Liu,Haibo Lin,Jianqiang Wang,Tiantian Li,Qiu Han,Qile Fang
Low energy consumption in water desalination is highly demanded. Herein, we show that the Janus porous membrane, which comprises a superhydrophobic SiO2 coating on a superhydrophilic polyvinylidene fluoride (PVDF) membrane, exhibits unprecedented osmotic water permeability (2.88 L m−2 h−1 bar−1) and near-complete reverse salt rejection (Js/Jw = 0.007 g L−1) far beyond the-state-of-art thin-film composite (TFC) membranes. The appropriate SiO2 seeding allows the hydrophilic PVDF fibrils to stretch out of the top tip of the microspheres to form a one-way valve, serving as nano-structured water channels while the superhydrophobic side, by trapping air, functions as the active layer to repel reverse salt diffusion. The hydrophilic microsphere partially covered by F-SiO2 is regarded as a micro-osmosis unit. Both external and internal concentration polarization are well diminished, with the superhydrophobic side facing towards the draw solution. This intriguing result deepens our understanding of unidirectional mass transfer through the Janus nano-channels in fluid osmosis.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Yingyao He,Jianqiang Wang,Xinyu Fu,Haibo Lin,Weilin Zhang,Xiao Wang,Fu Liu
The water transport channel brought about by nanoparticles enables to improve the permeability of thin film nanocomposite (TFN) membranes. For the TFN nanofiltration membranes fabricated by conventional interfacial polymerization , most nanoparticles are concentrated and agglomerate in the bottom of the separation layer. Therefore, the efficient utilization of nanoparticles for homogeneous water channel formation remains a challenge. In this study, we propose to prepare TFN polyamide nanofiltration membrane by nanoparticles involved electrosprayed interfacial polymerization. TiO 2 nanoparticles with particle size <10 nm were dispersed in the aqueous phase for electrosprayed polymerization, and the nanoparticles were evenly distributed inside the polyamide separation layer, which regulated the uniform distribution of newly formed interfacial water transport channels around the nanoparticles in the separation layer. With adopting a low concentration of 0.015 wt% TiO 2 , the water flux of TFN membrane increased by >60 %, achieving a water flux of 101.5 L m −2 h −1 under 5 bar. Meanwhile, rejection for Na 2 SO 4 was still kept as high as 91.1 %. This study provides a simple and controllable strategy for homogeneous distribution of water transport channels inside polyamide separation layer.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Membranes
·
2022
·Vol. 12
·期 9
·824
·
IF 4.562
Kai Liu,Jinwen Guo,Yingdong Li,Jinguang Chen,Pingli Li
Artificial water channels (AWCs) have been well investigated, and the imidazole-quartet water channel is one of the representative channels. In this work, covalent organic frameworks (COFs) composite membranes were fabricated through assembling COF layers and imidazole-quartet water channel. The membranes were synthesized by interfacial polymerization and self-assembly process, using polyacrylonitrile (PAN) ultrafiltration substrates with artificial water channels (HC6H) as modifiers. Effective combination of COF layers and imidazole-quartet water channels provide the membrane with excellent performance. The as-prepared membrane exhibits a water permeance above 271.7 L·m−2·h−1·bar−1, and high rejection rate (>99.5%) for CR. The results indicated that the composite structure based on AWCs and COFs may provide a new idea for the development of high-performance membranes for dye separation.Keywords:high-flux membranes;artificial water channels;COFs;composite structure
研究领域:
材料科学
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膜技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 22
·12439-12448
·
IF 2.936
Xinxia Tian,Jian Wang,Huifeng Zhang,Zhen Cao,Man Zhao,Yipeng Guan,Yushan Zhang
Thin film nanocomposite (TFN) reverse osmosis (RO) membranes were prepared by incorporating hydrotalcite (HT) in polyamide layer during interfacial polymerization process using two methods: (1) dispersing HT in aqueous solution directly; (2) preparing layered double oxide (LDO) via calcination of HT and then dispersing the obtained LDO in aqueous solution to reconstruct HT. The results demonstrated that TFN RO membranes exhibited higher water flux compared with the pristine RO membrane, which could be mainly attributed to water channels constructed by HT as well as the enhancement of hydrophilicity and the increase of relative surface area. In addition, TFN RO membranes prepared using LDO showed higher water flux than those prepared using HT, which is contributed to the uniform distribution of water channels in polyamide layer resulting from the process of calcination and reconstruction reaction. Compared with pristine RO membrane, water flux of TFN RO membranes prepared with 0.075 wt% HT and those prepared with 0.050 wt% LDO was enhanced by 19.1% and 22.8% without sacrificing the salt rejection.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2019
·Vol. 6
·期 3
·904-915
·
IF 7.704
Abdul Ghaffar,Lina Zhang,Xiaoying Zhu,Baoliang Chen
Graphene oxide (GO) membranes (GOMs) are robust and demonstrate excellent rejection of ions and are promising for use in water treatment. However, maintaining the stability of GOMs during processing and scale-up is difficult in practice and is somewhat counterintuitive. Herein, we report the synthesis of GOM by the blade casting technique, followed by cation (K+, Na+, Li+, Mg2+, Ca2+, and Ba2+) intercalation, leading to membranes that possess different thicknesses and interlayer spacings. The thickness and interlayer spacing as controlled by different cations were crosschecked after immersion in water and the changes were examined by SEM and XRD. The thickness and interlayer spacing was ultimately dependent on the hydrated radius of the cations and only K+, Mg2+, Ca2+, and Ba2+ were able to effectively stabilize GOM. Moreover, GOM with Ca2+ (GOM-Ca2+), and after reduction (GOM-Ca2+-R), was further examined in water, acidic and alkaline solutions to check the stability. The water flux of GOM-K+, GOM-Ba2+, GOM-Ca2+ and GOM-Mg2+ was decreased relative to membrane thickness, whereas the rejection % of different ions (Na+, Cu2+, Ni2+, Pb2+ and Mg2+) was based on the interlayer spacing. Based on these findings, we demonstrate a simple and scalable method to obtain graphene-based membranes with good stability, adjustable thickness and tunable interlayer spacing, thereby eliminating the problems caused by aggregation and functional moieties.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 19
·10715-10726
·
IF 3.049
Zhixia Liang,Yanbin Yun,Manxiang Wang,Guicheng Liu,Peng Lu,Woochul Yang,Chunli Li
Aquaporins play a promising role in the fabrication of high-performance biomimetic membranes. Interfacial polymerisation is a promising strategy for synthesizing aquaporin-based membranes. In this study, robust and high-performance aquaporin-based biomimetic membranes were successfully fabricated by interfacial polymerisation, and the membrane separation performance and interfacial polymerisation method were systematically evaluated. The effects of modification methods on the performance of aquaporins-based biomimetic membranes, including sodium hypochlorite and thermal post-treatment, protein-to-lipid ratio, liposome concentration and the addition arrangement of aquaporins were also investigated. Morphological observation suggested that the introduced proteoliposomes were completely embedded in the polyamide layer and that their spherical shape was preserved. Sodium hypochlorite post-treatment and thermal treatment were beneficial in improving the water flux and salt rejection of the resultant membrane without sacrificing the aquaporin activity. The biomimetic membranes had a high water flux and salt rejection, which were almost twice that of the control membranes, after aquaporin-based proteoliposomes were incorporated with an appropriated protein-to-lipid ratio and liposome concentration. The addition arrangement of aquaporins during the interfacial polymerisation procedure significantly influence the obtained membrane's structure. Lastly, this article introduces valuable and systematic research on interfacial polymerisation fabricated aquaporin-based biomimetic membranes with outstanding separation performance.
研究领域:
材料科学
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生物工程
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环境工程
✓ 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）