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Degradation of dichloromethane by an isolated strain Pandoraea pnomenusa and its performance in a biotrickling filter

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Journal of Environmental Sciences 2014年第5期26卷 1108-1117页

作者： Jianming Yu Wenji Cai Zhuowei Cheng Jianmeng Chen collaborative innovation center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology College of Biological and Environmental Engineering Zhejiang University of Technology

A strain Pandoraea pnomenusa LX-1 that uses dichloromethane （DCM） as sole carbon and energy source has been isolated and identified in our laboratory. The optimum aerobic biodegradation of DCM in batch culture was evaluated by response surface methodology. Maximum biodegradation （5.35 mg/（***）） was achieved under cultivation at 32.8℃, pH 7.3, and 0.66% NaC1. The growth and biodegradation processes were well fitted by Haldane＇s kinetic model, yielding maximum specific growth and degradation rates of 0.133 hr^-1 and 0.856 hr^-1, respectively. The microorganism efficiently degraded a mixture of DCM and coexisting components （benzene, toluene and chlorobenzene）. The carbon recovery （52.80%-94.59%） indicated that the targets were predominantly mineralized and incorporated into cell materials. Electron acceptors increased the DCM biodegradation rate in the following order： mixed 〉 oxygen 〉 iron 〉 sulfate 〉 nitrate. The highest dechlorination rate was 0.365 mg C1-/（*** biomass）, obtained in the presence of mixed electron acceptors. Removal was achieved in a continuous biotrickling filter at 56%-85% efficiency, with a mineralization rate of 75.2%. Molecular biology techniques revealed the predominant strain as P. pnomenusa LX-1. These results clearly demonstrated the effectiveness of strain LX-1 in treating DCM-containing industrial effluents. As such, the strain is a strong candidate for remediation of DCM coexisting with other organic compounds.

关键词： dichloromethane Pandoraea pnomenusa biodegradation characteristics removal performance carbon balance

Tomography of the dynamic stress coefficient for stress wave prediction in sedimentary rock layer under the mining additional stress

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International Journal of Mining Science and Technology 2021年第4期31卷 653-663页

作者： Wenlong Shen Guocang Shi Yungang Wang Jianbiao Bai Ruifeng Zhang Xiangyu Wang henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources School of Energy Science and EngineeringHenan Polytechnic UniversityJiaozuo 454000China Key Laboratory of Deep Coal Resource Mining Ministry of Education State Key Laboratory of Coal Resources and Safe MiningChina University of Mining and TechnologyXuzhou 221116China collaborative innovation center of Coal Work Safety and Clean High Efficiency Utilization Jiaozuo 454000China

In this study,the tomography of dynamic stress coefficient(TDSC)was established based on a mechanical model of stress wave propagation in bedding planes and a mathematical model of the stress wave attenuation in rock *** reliability of the TDSC was verified by a linear bedding plane model and field ***,the TDSC in the dynamic stress propagation of bedding planes increases with the following conditions:(1)the increase of the normal stiffness of the bedding plane,(2)the increase of the incident angle of the stress wave,(3)the decrease of the incident frequency of the stress wave,or(4)the growth of three ratios(the ratios of rock densities,elastic moduli,and the Poisson’s ratios)of rocks on either side of bedding *** additional stress weakens TDSC linearly and slowly during the stress wave propagation in bedding planes,and the weakening effect increases with the growth of the three ***,the TDSC decreases exponentially in the rock mass as propagation distance *** a field case,the TDSC decreases significantly as vertical and horizontal distances increase and its wave range increases as vertical distance increases in the sedimentary rock layers.

关键词： Tomography of the dynamic stress coefficient Stress wave attenuation Mining additional stress Sedimentary rock layer

Theoretical insights into photochemical ESITP process for novel DMP-HBT-py compound

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Chinese Physics B 2020年第10期29卷 222-226页

作者： Guang Yang Kaifeng Chen Gang Wang Dapeng Yang Basic Teaching Department Jiaozuo UniversityJiaozuo 454000China collaborative innovation center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

We execute the density functional theory(DFT) and time-dependent density functional theory(TDDFT) approaches to make a detailed exploration about excited state luminescent properties as well as excited state intramolecular proton transfer(ESIPT) mechanism for the novel 2,6-dimethyl phenyl(DMP-HBT-py) system. Firstly, we check and confirm the formation and stabilization of hydrogen bonding interaction for DMP-HBT-py. Via optimized geometrical parameters of primary chemical bond and infrared(IR) spectra, we find O–H··· N hydrogen bond of DMP-HBT-py should be strengthened in S1 state. Insights into frontier molecular orbitals(MOs) analyses, we infer charge redistribution and charge transfer(ICT)phenomena motivate ESIPT trend. Via probing into potential energy curves(PECs) in related electronic states, we come up with the ultrafast ESIPT behavior due to low potential barrier. Furthermore, we search the reaction transition state(TS)structure, the ultrafast ESIPT behavior and mechanism of DMP-HBT-py compound can be re-confirmed. We sincerely wish this work could play roles in further developing novel applications based on DMP-HBT-py compound and in promoting efficient solid emitters in OLEDs in future.

关键词： infrared vibrational spectra intramolecular charge transfer potential energy curve excited state intramolecular proton transfer

Octagold selenido nanoclusters:Significance of surface ligands on tuning geometric and electronic structure of Au8Se2 kernel

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Nano Research 2021年第10期14卷 3343-3351页

作者： Shanshan Zhang Yingzhou Li Lei Feng Qingwang Xue Zhiyong Gao Chenho Tung Di Sun School of Chemistry and Chemical Engineering State Key Laboratory of Crystal MaterialsShandong UniversityJi’nan 250100China Shandong Provincial Key Laboratory of Molecular Engineering Qilu University of Technology(Shandong Academy of Science)Ji’nan 250353China Shandong Provincial Key Laboratory of Chemical energy Storage and Novel Cell Technology and School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000China School of Chemistry and Chemical Engineering Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of EducationHenan Normal UniversityXinxiang 453007China

Two diphosphine-protected superatom gold selenido nanoclusters,[Au_(8)Se_(2)(dppm)4]^(2+)(SD/Au_(8)a,dppm=Ph_(2)PCH_(2)PPh_(2))and[Au_(8)Se_(2)(dppe)4]^(2+)(SD/Au_(8)b,dppe=Ph_(2)P(CH_(2))2PPh_(2)),were obtained by the reduction of[Au(SMe2)Cl]in the presence of Ph3PSe as the selenium ion releasing *** can be regarded as“superatoms”with 1S^(2)configuration based on the spherical Jellium *** the same metal-ligand binding motifs on the surface and the intrinsic C_(2)molecular symmetry,the configurations of Au_(8)Se_(2)kernels in them are different in terms of Au-Au bonded metallic ***/Au_(8)a displays a heart-shaped[core+exo]type structure(Au4 tetrahedron core+two exo Au2Se units),whereas the two exo Au_(2)Se counterparts in SD/Au_(8)b are additionally locked by an obvious Au-Au bond,forming a distorted hexagonal Au6 ring with two capping AuSe units appended above and below ***,they showed different photophysical properties as reflected by their electronic absorption and emission ***,both SD/Au_(8)a and SD/Au_(8)b exhibit blue-shifted thermochromic luminescence upon cooling from 293 to 83 K but the latter exhibits anomalous emission intensity evolution trends due to the occurrence of temperature-induced phase transition as revealed by varied-temperature crystallographic *** work not only clearly illustrates the significance of ligands on tuning the kernel structure but also provides two rarely comparable examples for better understanding of the structure-property relationship of gold nanoclusters.

关键词： gold selenido nanocluster ligand effect collision induced dissociation thermochromic luminescence phase transition

Influence of abrasive hardness on erosion wear of abrasive air jets

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Journal of Central South University 2020年第2期27卷 356-371页

作者： LIU Yong CHEN Chang-jiang WEI Jian-ping LIU Xiao-tian WANG Xiang-dong State Key Laboratory Cultivation Base for Gas Geology and Gas Control Henan Polytechnic UniversityJiaozuo 454000China State collaborative innovation center of Coal Work Safety and Clean-efficiency Utilization Jiaozuo 454000China Safety Technology Training Institute Henan Polytechnic UniversityJiaozuo 454000China Huajin Coking Coal Co. Ltd.Lüliang 033000China

To make clear the influence of abrasive hardness on the erosion effect,the erosion experiments of abrasive air jet with the same impact energy were carried *** influence of abrasive hardness on the erosion effect is clarified by comparing the different erosion *** main conclusions are as *** the same mass flow rate and mesh number,the abrasive with a higher density needs greater pressure irrespective of *** erosion damage,the abrasive size exhibits a Weibull *** shape parameterβand Weibull distribution function of four types of abrasives are derived by the least squares method;moreover,βis found to have a quadratic relation with abrasive *** results of the erosion experiments show that abrasive hardness and erosion depth are quadratically *** calculating the increase in surface energy after abrasive erosion crushing,it is found that abrasive hardness has a quadratic relation with surface energy and that the increases in erosion depth and surface energy consumption are basically *** conclusion,the effect is a soft abrasive impact when the ratio of abrasive hardness(Ha)to the material hardness(Hm)is3.

关键词： abrasive air jet abrasive hardness rock erosion abrasive size distribution coal bed methane

Micropore engineering on hollow nanospheres for ultra-stable sodium-selenium batteries

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Journal of energy Chemistry 2023年第5期80卷 99-109,I0004页

作者： Gongke Wang Yumeng Chen Yu Han Lixue Yang Wenqing Zhao Changrui Chen Zihao Zeng Shuya Lei Shaohui Yuan Peng Ge School of Materials Science and Engineering Henan Engineering Research Center of Design and Recycle for Advanced Electrochemical Energy Storage MaterialsHenan Normal UniversityXinxiang 453007HenanChina Comprehensive energy Research center Institute of Science and TechnologyChina Three Gorges CorporationBeijing 100038China School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina

Attracted by high energy density and considerable conductivity of selenium(Se),Na-Se batteries have been deemed promising energy-storage ***,it still suffers from sluggish kinetic behaviors and similar“shuttling effect”to ***,utilizing uniform hollow carbon spheres as precursors,Se-material is effectively loaded through vapor-infiltration *** to the distribution of optimized pores,the content of microspores could be up to~60%(<2 nm),serving important roles for the physical confinement ***,the rich oxygen-containing groups and N-elements could be noted,inducing the evolution of electron-moving *** significantly,assisted by the interfacial C-Se bonds and tiny Se distributions,Se electrodes are activated during *** as cathodes for Na-Se systems,the as-resulted samples display a capacity of 593.9 mA h g^(-1)after 100 cycles at the current density of 0.1 *** after 6000 cycles,the capacity could be still kept at about 225 mA h g^(-1)at 5.0 *** by the detailed kinetic analysis,the designed microspores size induces the increasing redox reaction of nano Se,whilst the surface traits further render the enhancement of pseudo-capacitive ***,after cycling,the product Sex(x<4)in pores serves as the primary active *** this,the work is anticipated to provide an effective strategy for advanced electrodes for Na-Se systems.

关键词： Carbon host Tailoring pores Heteroatom doping Vapor-infltration method Sodium-selenium batteries

Multi-organelle-targeting pH-dependent NIR fluorescent probe for lysosomal viscosity

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Chinese Chemical Letters 2023年第3期34卷 378-382页

作者： Huili Wang Yishuo Sun Xuemei Lin Wei Feng Zhanxian Li Mingming Yu Green Catalysis center and College of Chemistry Zhengzhou UniversityZhengzhou 450001China Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersInstitutes of Biomedical Sciences&Collaborative Innovation Center of Chemistry for Energy MaterialsFudan UniversityShanghai 200433China

The normal operation of lysosome, mitochondria, Golgi apparatus and endoplasmic reticulum plays a significant role in maintaining cell homeostasis. Reflecting the state and function of lysosomes, viscosity is a pivotal parameter to assess the stability of microenvironment. Herein, based on TICT mechanism,a new NIR pH-dependent fluorescent probe DCIC with push-pull electronic moiety was synthesized to identify the lysosomes viscosity. In viscous media, DCIC was highly sensitive to viscosity, fluorescence intensity increased by 180 times as viscosity increased from 1.0 cp to 438.4 cp. In addition, DCIC have high localization ability for lysosome, mitochondria, Golgi apparatus, and endoplasmic reticulum and can monitor lysosomal viscosity fluctuations with laser confocal microscopy.

关键词： NIR Lysosomal viscosity PH-dependent Multi-organelle localization

Special Topic on Ionic Liquids： energy, Materials ＆ Environment

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Science China Chemistry 2016年第5期59卷 505-506页

作者： Suojiang Zhang Buxing Han Jianji Wang Beijing Key Laboratory of Ionic Liquids Clean Chemical Process Institute of Process and EngineeringChinese Academy of SciencesBeijing 100190China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China collaborative innovation center of henan province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007China

Ionic liquids （ILs） are organic salts with low melting points, which have many unusual properties like negligible vapor pressure, good thermal stability, non-flammability, wide liquid range and electrochemical window, and excellent solvation power for both organic and inorganic substances. The unique characteristics of ILs endow them with great potential for applications in different fields including chem- ical reactions, extraction and separation, material science, renewable energy, environment, and photoelectric trans- formations. Their properties can be tuned to suit various applications by changing the structures of the cations and/or anions.

关键词： Chemistry Synthesis (chemical)

Reconstruction of different scales of pore-fractures network of coal reservoir and its permeability prediction with Monte Carlo method

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International Journal of Mining Science and Technology 2017年第4期27卷 693-699页

作者： Ni Xiaoming Chen Wenxue Li Zheyuan Gao Xiang School of energy Science and Engineering School of Civil Engineering Henan Polytechnic University Jiaozuo 454000 China collaborative innovation center of Coalbed Methane and Shale Gas for Central Plains Economic Region Jiaozuo 454000 China Opening Project of Key Laboratory of Deep Mine Construction Henan Polytechnic University Jiaozuo 454000 China Department of Building Civil & Environmental Engineering Concordia University Montreal H3G1M8 Canada china Coal Tunnel Engineering Go. LTD Xuzhou 221000 China

There are millimeter, micron and nanometer scales of pores and fractures in coal to describe different scales of coal pores and fissures communicating path and to quantitatively characterize their permeability. Such information provides an important basis for studying coalbed methane output mechanism. The pores and fissures in a large number of coal samples were observed and counted by scanning electron microscopy and optical microscopy. The probability distribution models of pore-fissure network were then established. Different scales of pore-fissures 2D network models were reconstructed by Monte Carlo method. The 2D seepage models were obtained through assignment zero method and using Matlab software. The effect of permeability on different scale pore-fractures network was obtained by two-dimensional seepage equation. Predicted permeability is compared with the measured ones. The results showed that the dominant order of different scale pore-fractures connected path from high to low is millimeter-sized fractures, seepage pores and micron-size fractures. The contribution of coal reservoir permeability from large to small is millimeter-size fractures, micron-size fractures and seepage pores. Different parameters in different scale pore-fractures are of different influence *** of different scale pore-fractures network can clearly display the connectivity of porefractures, which can provide a basis for selecting migration path and studying gas flow pattern.

关键词： Fractures network Different scales Reconstruction Permeability