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| 1 | Removal of Pb(Ⅱ) from aqueous solution by hydrous manganese dioxide:Adsorption behavior and mechanism显示文摘Hydrous manganese dioxide (HMO) synthesized by redox of potassium permanganate and hydrogen peroxide was used as an adsorbent for Pb(Ⅱ) removal.The specific surface area,pore volume and BJH pore diameter of the HMO were 79.31m2/g,0.07cm3/g and 3.38 nm,respectively.The adsorption equilibrium at 298K could be well described by the Langmuir isotherm equation with q max value of 352.55mg/g.The negative values of G and the positive values of H and S indicated the adsorption process was spontaneous and endothermic.The pseudo second-order equation could best fit the adsorption data.The value of the calculated activation energy for Pb(Ⅱ) adsorption onto the HMO was 38.23 kJ/mol.The uptake of Pb(Ⅱ) by HMO was correlated with increasing surface hydroxyl group content and the main adsorbed speciation was PbOH+.The final chemical state of Pb(Ⅱ) on the surface of HMO was similar to PbO.HMO was a promising candidate for Pb(Ⅱ) removal from aqueous solution. | Meng Xu Hongjie Wang Di Lei Dan Qu Yujia Zhai Yili Wang | 2013 | Journal of Environmental Sciences2013，25，3： | 9 |
| 2 | Alteration of dominant cyanobacteria in different bloom periods caused by abiotic factors and species interactions显示文摘Freshwater cyanobacterial blooms have drawn public attention because they threaten the safety of water resources and human health worldwide.Heavy cyanobacterial blooms outbreak in Lake Taihu in summer annually and vanish in other months.To find out the factors impacting the cyanobacterial blooms,the present study measured the physicochemical parameters of water and investigated the composition of microbial community using the 16S rRNA gene and internal transcribed spacer amplicon sequencing in the months with or without bloom.The most interesting finding is that two major cyanobacteria,Planktothrix and Microcystis,dramatically alternated during a cyanobacterial bloom in 2016,which is less mentioned in previous studies.When the temperature of the water began increasing in July,Planktothrix appeared first and showed as a superior competitor for M.aeruginosa in NO3^−-rich conditions.Microcystis became the dominant genus when the water temperature increased further in August.Laboratory experiments confirmed the influence of temperature and the total dissolved nitrogen(TDN)form on the growth of Planktothrix and Microcystis in a co-culture system.Besides,species interactions between cyanobacteria and non-cyanobacterial microorganisms,especially the prokaryotes,also played a key role in the alteration of Planktothrix and Microcystis.The present study exhibited the alteration of two dominant cyanobacteria in the different bloom periods caused by the temperature,TDN forms as well as the species interactions.These results helped the better understanding of cyanobacterial blooms and the factors which contribute to them. | Zhenyan Zhang Xiaoji Fan WJ.G.M.Peijnenburg Meng Zhang Liwei Sun Yujia Zhai Qi Yu Juan Wu Tao Lu Haifeng Qian | 2021 | Journal of Environmental Sciences2021，33，1： | 2 |
| 3 | Synthesis of LiMn2O4 Nano-wires via Flux Method and Their Usage as Cathode Material for Lithium Ion Batteries显示文摘 | MENG Yujia LIU Xiaoyang LIU Li LI Benxian ZHAO Xudong FENG Likun WANG Yanxiang WANG Xiaofeng | 2015 | Chemical Research in Chinese Universities2015，31，5： | 1 |
| 4 | Preliminary results of the spilling effects on the oscillation of a pipe with compressible fluid inside显示文摘It is known to all,the spilling of pipeline may cause serious problems,especially when the pipe conveying petroleum,natural gas or other toxic substance.There are countless accidents during past century.Once the spilling occurs,the vibration of the pipe would aggravate spill situation and even result in crack of the pipe.The consequence will be more severe when the fluid inside is compressible.To prevent the detriment of the spilling model is developed by assuming the leakages as orifices or nozzles and a 2-D vertical simply supported pipe is selected to analyze the phenomena of the oscillation.Combining these two models,the oscillation model for the pipe with leakage is set up and the spilling effect is analyzed by numerical method.The amplitude of the pipe oscillation and the normal stress enlarge as the internal velocity increased,while the shear stress changes very little. | Wei Zhang Ye Li Shuai Meng Yujia Di Ojuhao Hu | 2017 | Theoretical & Applied Mechanics Letters2017，7，1： | 1 |
| 5 | Hierarchical SAPO-11 Molecular Sieve for n-Alkane Hydroisomerization Synthesized by Directing Agent Method显示文摘Silicoaluminophosphates SAPO-11 molecular sieves with small particle size and hierarchical pores were synthesized using the directing agent method.The effect of crystallization time on the particle structure,morphology,pore structure properties,and acid properties of SAPO-11 molecular sieves were investigated.Unlike the SAPO-11 molecular sieves synthesized with the conventional method,the results of XRD,SEM,BET and NH3-TPD analyses showed that the SAPO-11 molecular sieves synthesized by the directing agent method in a shorter crystallization time exhibited fine and uniform morphology.By increasing the crystallization time,the particle size of SAPO-11 molecular sieve was significantly reduced,and the mesoporous structure(intercrystalline pores)was formed.Furthermore,the external specific surface area and the total specific surface area reached 81.7 m^2/g and 192.0 m^2/g,respectively,which effectively reduced the pore mass transfer resistance and significantly increased the number of acid sites.The results of n-dodecane hydroisomerization revealed that the Pt/SAPO-11 prepared with the novel method exhibited higher catalytic activity and better hydroisomerization selectivity than that synthesized by the conventional hydrothermal method.Thus,the small particle molecular sieve showed a promising industrial application prospect to be used as catalyst support. | Meng Yuan Wang Haiyan Sun Na Yang Zhanxu Wang Yujia | 2020 | China Petroleum Processing & Petrochemical Technology2020，22，4： | 1 |
| 6 | 磷不是内蒙古温带典型草原地上净初级生产力的主要限制因素显示文摘磷是植物生长所必需的营养元素,然而,温带典型草原地上净初级生产力(ANPP)是否受到磷的限制仍存在争议。为探讨磷添加在自然条件和氮添加条件下对温带典型草原ANPP和不同功能群植物地上生物量的影响,本研究利用位于内蒙古温带典型草原的中国科学院植物研究所多伦恢复生态学试验示范研究站的16年氮磷添加实验平台,对植物群落ANPP、禾草和杂类草地上生物量以及土壤有效氮、磷含量进行了连续5年(2016–2020)的测量。研究结果表明,在自然条件下添加磷对ANPP和禾草、杂类草的地上生物量没有显著影响。而在添加氮的条件下,添加磷显著增加了ANPP和杂类草的地上生物量。线性回归分析的结果表明,ANPP与土壤速效磷浓度无显著相关,而与土壤速效氮浓度呈显著正相关。这些结果表明,磷不是内蒙古温带典型草原初级生产力的主要限制因素,但在添加氮的条件下添加磷可以提高温带典型草原的ANPP并改变植物群落组成。本研究为指导温带典型草原的管理提供了有价值的信息。 | Yumeng Guo Meng Zhou Jun Sheng Yujia Yuan Guangyuan Yuan Wen-Hao Zhang Wenming Bai | 2023 | Journal of Plant Ecology2023，16，4： | 0 |
| 7 | “Form”and“Ideographic”Construct the Era of Architectural Features显示文摘With the progress of human society,the development of architectural features is also very fast.The research on the era of building features under the construction of“table shape”and“ideology”has received great attention.The form of architectural features is accumulated over many years,and the accumulated experience is not available in other ways.The transformation of form and meaning is relative.According to the different architectural structures obtained from the macroscopic and microscopic differences,a unique architectural feature is formed.The simple algorithm is used to construct the system model of the building characteristics of the era of Linyi in order to better analyze,in order to improve our country’s architectural influence. | Yujia Niu Shaoqing Meng Nini Zhang | 2020 | Journal of World Architecture2020，4，5： | 0 |
| 8 | A comprehensive review on semiconductor-based photocatalysts toward the degradation of persistent pesticides显示文摘Pesticides refer to the chemicals to regulate plant growth and control pests used in agriculture.However,the extensive use of pesticides causes serious pollution that threatens the ecological environment and human health.Photocatalytic degradation of pesticides has become a promising way to deal with pesticide pollution.In this review,pesticides are classified according to the different targets and chemical structures.The recent developments on semiconductor-based photocatalysts including metal oxides,metal oxyhalides,carbon nitrides,metal sulfides were reviewed for degradation of pesticides.Importantly,several modification strategies to improve the photocatalytic performance are described such as doping,heterojunction construction,defect engineering,with special emphasis on anchoring single atom catalyst.Moreover,extensive efforts should be made to indepth understand the photodegradation mechanism by monitoring key intermediates.Our perspectives on the key challenges and future directions of developing high-performance semiconductor-based photocatalysts for pesticide degradation are elaborated. | Jing Zhu Min Liao Chen Zhao Mengmeng Liu Ali Han Chunna Zhu Yujia Sun Meng Zhao Sheng Ye Haiqun Cao | 2023 | Nano Research2023，16，5： | 0 |
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