|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Influence of floc dynamic protection layer on alleviating ultrafiltration membrane fouling induced by humic substances显示文摘Cake layer formation is inevitable over time for ultrafiltration(UF)membrane-based drinking water treatment.Although the cake layer is always considered to cause membrane fouling,it can also act as a'dynamic protection layer',as it further adsorbs pollutants and dramatically reduces their chance of getting to the membrane surface.Here,the UF membrane fouling performance was investigated with pre-deposited loose flocs in the presence of humic acid(HA).The results showed that the floc dynamic protection layer played an important role in removing HA.The higher the solution pH,the more negative the floc charge,resulting in lower HA removal efficiency due to the electrostatic repulsion and large pore size of the floc layer.With decreasing solution pH,a positively charged floc dynamic protection layer was formed,and more HA molecules were adsorbed.The potential reasons were ascribed to the smaller floc size,greater positive charge,and higher roughness of the floc layer.However,similar membrane fouling performance was also observed for the negative and positive floc dynamic protection layers due to their strong looseness characteristics.In addition,the molecular weight(MW)distribution of HA also played an important role in UF membrane fouling behavior.For the small MW HA molecules,the chance of forming a loose cake layer was high with a negatively charged floc dynamic protection layer,while for the large MW HA molecules it was high with a positively charged floc dynamic protection layer.As a result,slight UF membrane fouling was induced. | Baiwen Ma Siqi Wu Bodong Wang Zenglu Qi Yaohui Bai Huijuan Liu Jiuhui Qu Ruijun Wu | 2020 | Journal of Environmental Sciences2020，32，4： | 2 |
| 2 | Separation of injectable salidroside by column chromatography of macroporous resins for treating myocardial ischemia显示文摘The objective of the present study is to develop a method for large-scale separating and purifying salidroside from rhodiola kirilowii roots and for preparing injectable medicinal ingredient.Crude extract of salidroside was prepared by water-ethanol system,and purified by column chromatography of macroporous resins.Static adsorption and desorption studies were performed on six kinds of macroporous resins,and SP825 resin was chosen,followed by optimizing process parameters.The optimum sample volume,feed concentration,ratio of diameter to height,and feeding flow rate were 1.5 bed volumes(BV),15 mg/mL,1:10 and 1 BV/h,respectively.Dynamic desorption was performed consecutively with 8 BV of distilled water,3 BV of 5% ethanol and 8 BV of 10% ethanol at a flow rate of 2 BV/h.After three cycles in separating 3.5 tons of rhodiola kirilowii roots,salidroside purity was increased from 3.4% in the crude extract to 93.6% in purified salidroside product.This study provides a novel method to separate salidroside for injectable use. | JU RuiJun HUANG RenJie ZHOU Jia LI RuoJing ZHOU Peng ZHANG ZaoHua XIANG FeiJun XU DongJin LIU WeiXiang MA XingTian ZHANG Qiang LU WanLiang | 2012 | Science China Chemistry2012，55，7： | 2 |
| 3 | Genetic diversity of wild barley (Hordeum vulgare ssp. spontaneum) and its utilization for barley improvement显示文摘Wild barley(Hordeum vulgare spp.spontaneum) is the undisputed progenitor of cultivated barley and offers considerable potential as a genetic resource for barley improvement.Naturally occurring populations are distributed primarily across the Fertile Crescent,but secondary areas of diversity are also found in central Asia and Tibet.The pattern of its genetic diversity is non-random,and is structured on a global,regional and local scale.On a global scale,diversity follows ecogeography,while on a regional and local scale,it is more strongly determined by ecology.Populations growing in areas where the climate is unreliable and/or the soil is heterogeneous tend to retain the most diversity.A large number of accessions are currently conserved ex situ,but a high proportion of these have originated from the Fertile Crescent.Given the likelihood of future climate change,conserving germplasm both in situ and ex situ in the various regions where the species' currently existing is a research priority.The value of H.vulgare spp.spontaneum for the improvement of cultivated barley lies largely in its potential contribution to the levels of attainable pathogen resistance and abiotic stress tolerance. | XiaoYing Ma Chao Li AiDong Wang RuiJun Duan GenLin Jiao Eviatar Nevo GuoXiong Chen | 2012 | Research in Cold and Arid Regions2012，4，6： | 2 |
| 4 | Facile fabrication of amphoteric semi-interpenetrating network membranes for vanadium flow battery applications显示文摘For improvement of vanadium redox flow battery(VRB) performance, novel amphoteric semiinterpenetrating membranes(ASIPN) were prepared using poly(ether ether ketone)(PEEK) and polysulfone(PSf), the former bearing sulfonic groups and the latter imidazolium. These two groups form ionic crosslinks between PEEK and PSf; meanwhile, covalent cross links were built between PSf chains with addition of N-(3-aminopropyl)-imidazole. The amphoteric nature of the membrane allows facile proton and anion transport; the IPN structure and the presence of imidazolium cation effectively suppress vanadium ion crossover through the membrane. Therefore, the ASIPN based VRBs show higher Coulombic efficiency and energy efficiency than that assembled with pristine SPEEK and Nafion 212 membranes. Our work demonstrates that the ASIPN membranes are promising for VRB applications. | Ruijun Gan Yanjiao Ma Shanshan Li Fengxiang Zhang Gaohong He | 2018 | Journal of Energy Chemistry2018，27，4： | 2 |
| 5 | Establishment of Elymus natans improves soil quality of a heavily degraded alpine meadow in Qinghai-Tibetan Plateau, China显示文摘 | Ruizhang Feng Ruijun Long Zhanhuan Shang Yushou Ma Shikui Dong Yanlong Wang | 2010 | Plant and Soil (-)2010，，1： | 1 |
| 6 | 显示文摘 | TIAN Ruijun SUN Junming ZHANG He YE Mingliang XIE Chuanhui DONG Jin HU Jiwei MA Ding BAO Xinhe ZOU Hanfa | 2006 | Electrophoresis2006，27，4： | 1 |
| 7 | Eco-friendly non-acid intercalation and exfoliation of graphite to graphene nanosheets in the binary-peroxidant system for EMI shielding显示文摘The development of the preparation strategy for high-quality and large-size graphene via eco-friendly routes is still a challenging issue.Herein,we have successfully developed a novel route to chemically exfoliate natural graphite into high-quality and large-size graphene in a binary-peroxidant system.This system is composed of urea peroxide(CO(NH_(2))_(2)·H_(2)O_(2))and hydrogen peroxide(H_(2)O_(2)),where CO(NH_(2))_(2)·H_(2)O_(2)is used in preparing graphene for the first time.Benefiting from the complete decomposition of CO(NH_(2))_(2)·H_(2)O_(2)and H_(2)O_(2)into gaseous species under microwave(MW)irradiation,no water-washing and effluent-treatment are needed in this chemical exfoliation procedure,thus the preparation of graphene in an eco-friendly way is realized.The resultant graphene behaves a large-size,high-quality and few-layer feature with a yield of~100%.Then 4µm-thick ultrathin graphene paper fabricated from the as-exfoliated graphene is used as an electromagnetic interference(EMI)shielding material.And its absolute effectiveness of EMI shielding(SSE/t)is up to 34,176.9 dB cm^(2)/g,which is,to the best of our knowledge,among the highest values so far reported for typical EMI shielding materials.The EMI shielding performance demonstrates a great application potential of graphene paper in meeting the ever-increasingly EMI shielding demands in miniaturized electronic devices. | Ping Wang Bin Guo Zhi Zhang Weinan Gao Wei Zhou Huaxin Ma Wenyu Wu Junfeng Han Ruijun Zhang | 2021 | Chinese Chemical Letters2021，32，11： | 1 |
| 8 | Upgrading Siberian(Russia)crude oil by hydrodesulfurization in a slurry reactor:A kinetic study显示文摘Hydrodesulfurization(HDS)of sour crude oil is an effective way to address the corrosion problems in refineries,and is an economic way to process sour crude oil in an existing refinery built for sweet oil.In the current study,the HDS of Siberian crude oil was carried out in a slurry reactor.The Co-Mo,Ni-Mo,and Ni-W catalysts supported onγ-Al2O3 were compared at the temperature of 340℃ and the pressure of 4.5 MPa.The HDS activity follows the order of Co-Mo N Ni-Mo N Ni-Wat a high concentration of H2S,and the difference between Co-Mo and Ni-Mo becomes insignificant at a low concentration of H2S.The influence of reaction temperature 320-360℃ and reaction pressure 3-5.5 MPa was investigated,and both play a positive role in the HDS reaction.A kinetic model over Ni-Mo/Al2O3 in the slurry reactor was established.The activation energy is estimated as 60.34 kJ·mol−1;the orders of sulfur components and hydrogen partial pressure are 1.43 and 1.30,respectively.The kinetic parameters are compared with those in a trickle-bed reactor,implying that the mass transfer is greatly enhanced in the slurry reactor.The back mixing effect is present in the slurry reactor and can be reduced by a multi-stage design,which would lead to higher reactor efficiency in industrial application. | Kening Sun Xixi Ma Qiuchen Yang Rui Qiu Ruijun Hou | 2020 | Chinese Journal of Chemical Engineering2020，28，12： | 1 |
| 9 | Spectral properties of plant leaves pertaining to urban landscape design of broad-spectrum solar ultraviolet radiation reduction显示文摘 | Haruka Yoshimura Hui Zhu Yunying Wu Ruijun Ma | 2010 | International Journal of Biometeorology2010，，2： | 1 |
| 10 | ZMP-based gait optimization of the biped robot显示文摘 | Dou Ruijun Ma Peisun Xie Ling | 2003 | joumal ofDonghua University2003，20，4： | 1 |
| 11 | Fruits foraging patterns and seed dispersal effect of frugivorous birds on Hippophae rhamnoides sinensis显示文摘Behaviors of 18 species of birds eating fruits of Hippophae rhamnoides spp.sinensis were observed from September 2003 to March 2004.Their foraging patterns were found to be very different and can be divided into five classes:(1)direct swallowing the fruits on crown of the shrubs and sometimes regurgitating seeds soon after;(2)carrying the fruits to their perching sites and swallowing;(3)pecking the fruits from the shrubs to the ground,eating pulp and seeds but leaving pericarp;(4)pecking through the pericarp,eating pulp and leaving pericarp and seeds;(5)pecking through the pericarp on the top of fruits,and only eating seeds.These foraging patterns have different effects on seed dispersal of H.rhamnoides spp.sinensis.The germina-tion experiment of three groups of seeds(seeds from feces,dry fruits and extracted seeds from dry fruits)was carried out.Although ingestion processes of birds had some adverse effects on the seed germination of H.rhamnoides spp.sinensis,the seeds from feces still have a relatively higher germination ratio.H.rhamnoides spp.sinensis provides food to a variety of frugivorous birds,and the birds disperse its seeds.Thus,a mutually beneficial relationship between the bird and the seed is formed. | LU Xianwen SUN Kun MA Ruijun ZHANG Hui SU Xue WANG Mingli | 2006 | Frontiers in Biology2006，1，3： | 0 |
| 12 | Effects of test levels on creep and relaxation characteristic parameters of stem for rice seedlings grown in plastic cell tray显示文摘Creep and relaxation characteristics of stem for rice seedlings grown in plastic cell tray were studied by static tensile testing,in order to determine the relationship between characteristic parameters(rheological model parameters,stress components and strain components)and test levels(stress levels and strain levels).Rice seedling stem specimen used in the test was 40 mm in length.And the applied test values for the creep and relaxation test ranged from 1.0-3.0 MPa and 1.5%-3.5%,respectively,each for 5 levels.The results indicated that elastic modulus in the creep and relaxation model was not affected by test levels.However,except that viscosity coefficientηkv was a constant andηm1 decreased with the increase of test levels,other viscosity coefficient and rheological time nonlinearly increased as the test levels increased.And strain components in the creep model and stress components in the relaxation model significantly increased as the test levels increased. | Jinqing Xiao Ruijun Ma Yu Chen | 2020 | International Journal of Agricultural and Biological Engineering2020，13，4： | 0 |
| 13 | Facile and scalable preparation of ultra-large boron nitride nanosheets and their use for highly thermally conductive polymer composites显示文摘Due to their excellent physical and chemical properties,boron nitride nanosheets(BNNSs)have shown great application potential in many fields.However,the difficulty in scalable preparation of large-size BNNSs is still the current factor that limits this.Herein,a simple yet efficient microwave-assisted chemical exfoliation strategy is proposed to realize scalable preparation of BNNSs by using perchloric acid as the edge modifier and intercalation agent of h-BN.The as-obtained BNNSs behave a thin-layered structure(average thickness of 3.9 nm)with a high yield of~16%.Noteworthy,the size of BNNSs is maintained to the greatest extent so as to realize the preparation of BNNSs with ultra-large size(up to 7.1μm),which is the largest so far obtained for the top-down exfoliated BNNSs.Benefiting from the large size,it can significantly improve the thermal diffusion coefficient and the thermal conductivity of polyvinyl alcohol by 51 and 62 times respectively,both showing a higher value than the one previously reported.This demonstrates that the prepared BNNSs have great promise in enhancing the thermal conductivity of polymer materials. | Wenyu WU Bin GUO Xiaojing LIU Huaxin MA Zhao ZHANG Zhi ZHANG Minghao CUI Yu GU Ruijun ZHANG | 2022 | Frontiers of Materials Science2022，16，1： | 0 |
| 14 | Upgrading Siberian(Russia) crude oil by hydrodesulfurization: Kinetic parameter estimation in a trickle-bed reactor显示文摘Hydrodesulfurization(HDS) of sour crude oil is an effective way to address the corrosion problems in refineries and is an economic way to process sour crude oil in an existing refinery built for sweet oil.Siberian crude oil transported through the Russia-China pipeline could be greatly sweetened and could be refined directly in local refinery designed for Daqing crude oil after the effective HDS treatment.In this study,the HDS of Siberian crude oil was carried out in a continuous flow isothermal trickle-bed reactor over Ni-Mo/γ-Al_2 O_(3).The effects of temperature,pressure and LHSV were investigated in the ranges of 320-360℃,3-5 MPa and 0.5-2 h^(-1),keeping constant hydrogen to oil ratio at 600 L·L^(-1).The HDS conversion could be up to 92.89% at the temperature of 360℃, pressure of 5 MPa,and LHSV of 0.5 h^(-1), which is sufficient for local refineries(>84%).A three phase heterogeneous model was established to analyze the performance of the trickle-bed reactor based on the two-film theory using Langmuir-Hinshelwood mechanism.The order of sulfur component is estimated as 1.28,and the order of hydrogen is 0.39.By simulating the reactor using the established model,the concentration of H_(2), H_(2) S and sulfur along the catalyst bed is discussed.The model is significantly useful for industrial application with respect to reactor analysis,optimization and reactor design,and can provide further insight of the HDS of Siberian crude oil. | Kening Sun Xixi Ma Ruijun Hou | 2021 | Chinese Journal of Chemical Engineering2021，34，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员