JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Mao Mu,Nigel Graham,Wenzheng Yu,Kening Sun,Xiyan Xu,Ting Liu
The unique layered structure and abundant 2D nanochannels of MXene membranes have demonstrated outstanding permeability, indicating their great potential in the field of water treatment . However, their unstable interlayer spacing and irregular layer structure have limited their ability to separate small molecular pollutants effectively. In this study, we successfully prepared composite MXene membranes with high rejection and low adsorption properties by exploiting the differences in the surface functional groups and chain lengths of dopamine (DA) and polyethylene glycol (PEG) through an optimal cross-linking approach. These composite membranes exhibited excellent stability in terms of interlayer spacing and mitigated the adverse effects of stacking defects. Compared to MXene membranes, the composite membranes achieved a 1.76-fold increase in dye rejection efficiency, reaching 98.7% at most, with an adsorption ratio of only 1.8%. Moreover, outstanding performances were also exhibited in pressure and concentration load tests. Furthermore, in the context of forward osmosis applications, the composite membranes demonstrated excellent Na + rejection of 99.9%. More importantly, these membranes showed no performance deterioration throughout 50 filtration cycles, with only a slight increase in permeance of 19.3% over a 38-day testing period. Thus, this work presents a novel solution for fabricating MXene composite membranes with low swelling, minimal defects, and high stability, enhancing its potential in the field of water and wastewater treatment .
研究领域:
材料科学
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水处理工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2021
·Vol. 36
·期 3
·446-455
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IF 0.957
Zhang Ying,Wang Pengshuo,Sun Guowen,Yang Jianming,Gao Rui
A low adsorption clay-resistant polycarboxylate superplasticizer (KN-PC) was synthesized using acrylic acid and isopentenol polyoxyethylene ether as the main reaction materials. The structural characterization and clay-resistant mechanism of the KN-PC were explored using Fourier transform infrared spectroscopy and X-ray diffraction, and the effect of the KN-PC on the performance of composite paste with various montmorillonite (MMT) contents was analyzed. Compared with ordinary polycarboxylate superplasticizer (PC), the KN-PC has a low sensitivity to the MMT. By the action of the MMT, the adsorption dosage of the KN-PC on the MMT is much smaller than that of the PC.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2020
·Vol. 27
·期 13
·15188-15197
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IF 3.056
Dai Chaomeng,Zhou Hui,You Xueji,Duan Yanping,Tu Yaojen,Liu Shuguang,Zhou Feng,Hon Leong Kah
Transport of environmental pollutants in groundwater systems can be greatly influenced by colloids. In this study, the cotransport of Pb 2+ and silica (SiO 2 ) colloids at different Pb 2+ concentrations was systematically investigated by batch adsorption and saturated sand column experiments. Results showed that SiO 2 colloids had low adsorption capacity for Pb 2+ (less than 1% of the input) compared with sands. In saturated porous media, SiO 2 colloids showed a high mobility; however, with the increase of Pb 2+ concentration in the sand column, the mobility of SiO 2 colloids gradually decreased. Notably, SiO 2 colloids could facilitate Pb 2+ transport, although they did not serve as effective carriers of Pb 2+ . Under the condition of low Pb 2+ concentration, SiO 2 colloids promoted the Pb 2+ transport mainly through the way of “transport channel,” while changing the porosity of the medium and masking medium adsorption sites were the main mechanisms of SiO 2 colloid–facilitated Pb 2+ transport under the condition of high Pb 2+ concentration. The discovery of this non-adsorption effect of colloids would improve our understanding of colloid-facilitated Pb 2+ transport in saturated porous media, which provided new insights into the role of colloids, especially colloids with weak Pb 2+ adsorption capacity, in Pb 2+ occurrence and transport in soil-groundwater systems.
研究领域:
环境科学
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地下水污染研究
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产品关联
DOI
PubMed
高影响因子
Journal of Oceanology and Limnology
·
2023
·Vol. 41
·期 5
·1918-1939
·
IF 1.6
Guo Liwen,Zhao Yaqi,Guo Huarong
Crab cell line, especially continuous crab cell line, can provide us a useful tool for studies on the virology, immunology, and molecular biology of crabs. However, no continuous crab cell line has been available due to the lacking of suitable medium and the occurrence of mitosis-arrest. In this study, long-term in vitro culture conditions for both two- (2D) and three-dimensions (3D) were successfully developed for the circulating hemocytes of swimming crab Portunus trituberculatus , designated as PTH cells. In 2D culture, a novel crab basic medium in osmolarity of 990–1 100 mOsm/kg was optimized for the first time, which is different from Leibovitz’s L-15 medium in mainly the components of amino acids, containing double strengths of the contents of free amino acid mixture in the crab serum. Then an optimal crab growth medium was developed by supplementing 5% fetal bovine serum, 50-g/L yeast extract powder, 20-µg/L basic fibroblast growth factor and epidermal growth factor into the optimal crab basic medium, and found that it could support a long-term survival of PTH cells in a healthy monolayer up to 347 days and partially break through the mitosis-arrest of crab cells evidenced by the obvious increase of proliferating potential detected in the 10-d primarily cultured PTH cells. These 2D cultured PTH cells could be successfully sub-cultured for 11 times by physical flushing method and well cryopreserved in liquid nitrogen. In 3D culture, using the same crab growth medium, the PTH cell aggregates could be easily formed and healthily maintained on the surface of solidified Matrigel or in the ultra-low-attachment plate with a survival rate of 50%–60% on Day 103. This work largely improved the primary culture and subculture of crab cells and will facilitate the establishment of continuous crab cell line.
研究领域:
海洋生物学
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细胞生物学
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免疫学
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病毒学
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分子生物学
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DOI
高影响因子
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