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| 1 | The effect of Fe-Mn minerals and seawater interface and enrich-ment mechanism of ore-forming elements of polymetallic crusts and nodules from the South China Sea显示文摘Ferromanganese crusts and nodules are important submarine mineral resources that contain various metal elements with significant economic value. In this study, polymetallic crusts and nodules obtained from the South China Sea(SCS) were determined by using X-ray power diffraction(XRD), Raman spectroscopy(RS), Fourier transform infrared spectroscopy(FTIR), and X-ray photoelectron spectroscopy(XPS) to systematically investigate and analyze the mineralogical and spectral characteristics of the Fe-Mn minerals. XRD measurements revealed that the SCS polymetallic crusts and nodules were composed of vernadite, quartz, and plagioclase. The nodules also contained todorokite. The Fe-phase minerals of the SCS crusts and nodules were composed of amorphous Fe oxide/hydroxide, and the Mn-and Fe-phases minerals exhibited relatively poor degrees of crystallization. FTIR results showed that the Fe-Mn minerals in the crusts and nodules included a large number of surface hydroxyl groups. These surface hydroxyl groups contained protons that could provide reactive sites for complexation of ore-forming elements in seawater. XPS results indicated that the surfaces of the Fe-Mn minerals mainly contained Fe, Mn, and O. Fe was present in the trivalent oxidation state, while Mn, which may contain several bivalent oxidation state, was present in the tetravalent and trivalent oxidation states. The SCS polymetallic crusts and nodules were compared with Pacific seamount crusts, and results showed that the surface hydroxyl(-OH) groups of the SCS crusts and nodules numbered more than the lattice oxygen(O^(2-)). But the lattice oxygen of Pacific seamount crusts numbered more than the surface hydroxyl groups. This characteristic indicated that the degree of crystallization of Fe-Mn minerals from the Pacific Ocean was higher than that of minerals from the South China Sea. Comprehensive studies showed that ore-forming elements in the interface between seawater and the Fe-Mn minerals in the submarine ferromanganese crusts and nodules employed the following enrichment mechanisms:(1) the metal ion complexed with the surface hydroxyl of Fe-Mn minerals to form hydroxyl complexes, which were connected by coordination bonds or stable inner-sphere complexes that exchanged protons on the mineral surfaces;(2) the charged surfaces of the minerals and metal cations formed outer-sphere complexes, which made up the electrostatic double layer, through electrostatic adsorption; and(3) the metal cations isomorphously exchanged the Mn and Fe ions of the mineral lattice structure. | GUAN Yao SUN Xiaoming IANG Xiaodong SA Rina ZHOU Li HUANG Yi LIU Yating LI Xiaojie LU Rongfei WANG Chi | 2017 | Acta Oceanologica Sinica2017，36，6： | 4 |
| 2 | High-performance SSZ-13 membranes prepared using ball-milled nanosized seeds for carbon dioxide and nitrogen separations from methane显示文摘SSZ-13 membranes with high separation performances were prepared using ball-milled nanosized seeds by once hydrothermal synthesis.Separation performances of SSZ-13 membranes in CO2/CH4 and N2/CH4 mixtures were enhanced after synthesis modification.Single-gas permeances of CO2,N2 and CH4 and ideal selectivities were recorded through SSZ-13 membranes.The effects of temperature,pressure,feed flow rate and humidity on separation performance of the membranes were discussed.Three membranes prepared after synthesis modifications had an average CO2 permeance of 1.16×10-6 mol·(m2·s·Pa)-1(equal to 3554 GPU)with an average CO2/CH4 selectivity of 213 in a 50 vol%/50 vol%CO2/CH4 mixture.It suggests that membrane synthesis has a good reproducible.The membrane also displayed a N2 permeance of 1.07×10-7 mol·(m2·s·Pa)-1(equal to 320 GPU)with a N2/CH4 selectivity of 13 for a 50 vol%/50 vol%N2/CH4 mixture.SSZ-13 membrane displayed stable and good separation performance in the wet CO2/CH4 mixture for a long test period over 100 h at 348 K.The current SSZ-13 membranes show great potentials for the simultaneous removals of CO2 and N2 in natural gas purification as a facile process suitable for industrial application. | Xinping Li Yaowei Wang Tangyin Wu Shichao Song Bin Wang Shenglai Zhong Rongfei Zhou | 2020 | Chinese Journal of Chemical Engineering2020，28，5： | 3 |
| 3 | Preparation and microstrnctural analysis of high-performance mordenite membranes in fluoride media 显示文摘 | Zhou Rongfei Hu Zhongli Hu Na | 2012 | Microporous and Mesoporous Materials2012，156，： | 1 |
| 4 | Preparation and upconversion emission properties of Yb, Er co-doped Y 2 Ti 2 O 7 upconversion inverse opal显示文摘 | Zhengwen Yang Jialun Zhu Dong Yan Hangjun Wu Rongfei Wang Zhiguo Song Xue Yu Yong Yang Dacheng Zhou Zhaoyi Yin Jianbei Qiu | 2012 | Optical Materials2012，，： | 1 |
| 5 | Synthesis of oriented zeolite T membranes from clear solutions and their pervaporation properties显示文摘 | Zhou Rongfei Hu Lili Zhang Youjun | | 0，，： | 1 |
| 6 | Washing out heavy metals from contaminated soils from an iron and steel smelting site显示文摘洗是为由化学动员分开土壤 ex-situ 的粒子一定的沾染物的一个有希望的方法。实验室批洗实验用 deionized 水和草酸酸的变化集中被进行,柠檬性的酸的、酒石的酸,醋酸,盐酸酸和 ethylenediaminetetra 醋酸( EDTA )弄脏估计把这些化学药品用作洗代理人的效率并且重重地从二清理重金属从一个熨斗和 streel 熔炼地点的土壤。毒性减小索引和补习费用被分析,并且结果证明土壤与 Cd, Pb 和 Zn 被弄脏。盐酸酸和 EDTA 是比在测试土壤的补习的另外的洗的代理人更有效的。最大的全部的毒性减小索引显示出毛孔散开不是在吸附过程的限制率的步的那 0.5 molggests。覰?覰?? | Guangxu ZHU Qingjun GUO Junxing YANG Hanzhi ZHANG Rongfei WEI Chunyu WANG Marc PETERS Xiaoyong ZHOU Jun YANG | 2015 | Frontiers of Environmental Science & Engineering2015，9，4： | 1 |
| 7 | Spatially re- solved gas permeation through SAPO-34 membranes 显示文摘 | Funke H H Tokay B Zhou Rongfei | 2012 | J Membr Sci2012，，： | 1 |
| 8 | Synthesis of zeolite T by microwave and conventional heating 显示文摘 | Zhou Rongfei Zhong Shenglai Lin Xiao | 2009 | Microporous and Mesopomus Materials2009，124，13： | 1 |
| 9 | The nuclear cytokine IL-37a controls lethal cytokine storms primarily via IL-1R8-independent transcriptional upregulation of PPARγ显示文摘Cytokine storms are crucial in the development of various inflammatory diseases,including sepsis and autoimmune disorders.The immunosuppressive cytokine INTERLEUKIN(IL)-37 consists of five isoforms(IL-37a-e).We identified IL-37a as a nuclear cytokine for the first time.Compared to IL-37b,IL-37a demonstrated greater efficacy in protecting against Toll-like receptor-induced cytokine hypersecretion and lethal endotoxic shock.The full-length(FL)form of IL-37a and the N-terminal fragment,which is processed by elastase,could translocate into cell nuclei through a distinctive nuclear localization sequence(NLS)/importin nuclear transport pathway.These forms exerted their regulatory effects independent of the IL-1R8 receptor by transcriptionally upregulating the nuclear receptor peroxisome proliferator-activated receptor(PPARγ).This process involved the recruitment of the H3K4 methyltransferase complex WDR5/MLL4/C/EBPβand H3K4me1/2 to the enhancer/promoter of Pparg.The receptor-independent regulatory pathway of the nuclear IL-37a–PPARγaxis and receptor-dependent signaling by secreted IL-37a maintain homeostasis and are potential therapeutic targets for various inflammatory diseases,including sepsis. | Rongfei Wei Xiao Han Mengyuan Li Yuan Ji Lianfeng Zhang Maria-Ioanna Christodoulou Najwa Jameel Hameed Aga Caiyan Zhang Ran Gao Jiangning Liu Jinrong Fu Guoping Lu Xiaojun Xiao Xiaoyu Liu Ping-Chang Yang Iain B.McInnes Ying Sun Peisong Gao Chuan Qin Shau-Ku Huang Yufeng Zhou Damo Xu | 2023 | Cellular & Molecular Immunology2023，20，12： | 0 |
| 10 | Synthesis of an IMF zeolite membrane for the separation of xylene isomer显示文摘The synthesis of a continuous IMF zeolite membrane was fabricated on tubular substrates by seeded growth for the first time. The straight channels of IMF zeolite with diameters of 0.53–0.59 nm are distinguishable for p-xylene from o-xylene molecules. Pure IMF-phase high-silica IM-5 zeolite seeds with uniform and fine crystal size were fabricated by a new sonication-assisted aging process. The seeds were coated on the support by dipcoating and induced the formation of continuous membrane. Separation performance in p-/o-xylene mixture was investigated at various temperature and pressure. The typical IM-5zeolite membrane had p-/o-xylene separation factor of 3.7. Our results suggest that IM-5 zeolite is a potentially good membrane material for the separation of xylene mixtures. | Wenwen Zhang Zhigang Xue Liyun Cui Haoliang Gao Di Zhao Rongfei Zhou Weihong Xing | 2023 | Chinese Journal of Chemical Engineering2023，60，8： | 0 |
| 11 | Extracting subpixel vegetation NDVI time series for evaluating the mixed pixel effect on GPP estimation in urban areas显示文摘The normalized difference vegetation index(NDVI)is the most widely used vegetation index for monitoring vegetation vigor and cover.As NDVI time series are usually derived at coarse or medium spatial resolutions,pixel size often represents a mixture of vegetated and non-vegetated surfaces.In heterogeneous urban areas,mixed pixels impede the accurate estimation of gross primary productivity(GPP).To address the mixed pixel effect on'NDVI time series and GPP estimation,we proposed a framework to extract subpixel vegetation NDVI(NDVI_(vege))from Landsat OLI images in urban areas,using endmember fractions,mixed NDVI(NDVI_(mix)),and NDVI.of non-vegetation,endmembers.Results demonstrated that the NDVI_(vege) extracted by this framework agreed well with the true NDVI_(vege) cross seasons and vegetation fractions,with R^(2) ranging from 0.74 to 0.82 and RMSE ranging from 0.03 to 0.04.The NDVI_(vege) time series was applied to evaluate vegetation GP in Wuhan,China.The total annual GPp estimated with NDVI_(vege) was 28-35%higher than the total annual GPP estimated with NDVI_(mix) implying uncertainty in the GPP estimations caused by mixed pixels.This study showed the potential of the proposed framework to resolve NDVI_(vege) for characterizing vegetation dynamics in heterogeneous areas. | Shuxu Li Zheng Zhou Rongfei Ma Shishi Liu Qingfeng Guan | 2023 | International Journal of Digital Earth2023，16，1： | 0 |
| 12 | Improved SSZ-13 thin membranes fabricated by seeded-gel approach for efficient CO_(2) capture显示文摘High-quality standard oil synthetic zeolite-13(SSZ-13) membranes with thickness only ~ 1.0 μm were prepared on tubular supports by the new seeded-gel approach. Seeded-gel approach is simpler than the normal secondary-growth one since adding seeds in the gel is simpler than seeding on the support surface. The synthesis time was greatly reduced from 3.0 to 1.0 d after synthesis modification of gel aging and seed sizes. Low temperature ozone calcination was used for the removal of the organic structural directing agent. The best SSZ-13 membrane displayed CO_(2)permeances of 1.3 × 10^(-6) and 1.5 × 10^(-6) mol·m^(-2)·s^(-1)·Pa^(-1) and CO_(2)/CH_(4) and CO_(2)/N_(2) selectivities of 125 and 27 for equimolar CO_(2)/CH_(4) and CO_(2)/N2mixtures at 0.2 MPa pressure drop and 298 K, respectively. Separation performance of the membrane in the two binary mixtures is higher than that of most zeolite membranes. Three SSZ-13 membranes were reproducibly prepared on tubular supports by seeded-gel approach and the standard deviation ratios of CO_(2) permeance and CO_(2)/CH_(4) selectivity are 12.5% and 7%, respectively. It suggests that this new synthesis approach is creditable. The effects of temperature and pressure on separation performance of the thin SSZ-13 membranes were studied in the two binary mixtures. The tubular SSZ-13 membranes displayed great potentials for CO_(2) capture from natural gas, biogas and flue gas. | Xingzhong Li Kunlin Yu Zibo He Bo Liu Rongfei Zhou Weihong Xing | 2023 | Chinese Journal of Chemical Engineering2023，56，4： | 0 |
| 13 | Characterizing large-scale weak interlayer shear zones using conditional random field theory显示文摘The shear behavior of large-scale weak intercalation shear zones(WISZs)often governs the stability of foundations,rock slopes,and underground structures.However,due to their wide distribution,undulating morphology,complex fabrics,and varying degrees of contact states,characterizing the shear behavior of natural and complex large-scale WISZs precisely is challenging.This study proposes an analytical method to address this issue,based on geological fieldwork and relevant experimental results.The analytical method utilizes the random field theory and Kriging interpolation technique to simplify the spatial uncertainties of the structural and fabric features for WISZs into the spatial correlation and variability of their mechanical parameters.The Kriging conditional random field of the friction angle of WISZs is embedded in the discrete element software 3DEC,enabling activation analysis of WISZ C2 in the underground caverns of the Baihetan hydropower station.The results indicate that the activation scope of WISZ C2 induced by the excavation of underground caverns is approximately 0.5e1 times the main powerhouse span,showing local activation.Furthermore,the overall safety factor of WISZ C2 follows a normal distribution with an average value of 3.697. | Gang Han Chuanqing Zhang Hemant Kumar Singh Rongfei Liu Guan Chen Shuling Huang Hui Zhou Yuting Zhang | 2023 | Journal of Rock Mechanics and Geotechnical Engineering2023，15，10： | 0 |
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