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Science China Chemistry 2016年第1期59卷 150-158页

作者： Jie Li changlun chen Rui Zhang Xiangke Wang Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow UniversitySuzhou 215123China School for Radiological and Interdisciplinary Sciences(RAD-X) Soochow UniversitySuzhou 215123China Faculty of Engineering King Abdulaziz UniversityJeddah 21589Saudi Arabia

Technetium-99(~99Tc),largely produced by nuclear fission of ~235U or ~239Pu,is a component of radioactive *** study focused on a remediation strategy for the reduction of pertechnetate(Tc O_4^-)by studying its chemical analogue rhenium(Re(VⅡ))to avoid the complication of directly working with radioactive *** zero-valent iron particles supported on graphene(NZVI/r GOs)from GOs-bound Fe ions were prepared by using a H_2/Ar plasma technique and were applied in the reductive immobilization of perrhenate(Re O_4^-).The experimental results demonstrated that NZVI/r GOs could efficiently remove Re from the aqueous solution,with enhanced reactivity,improved kinetics(50 min to reach equilibrium)and excellent removal capacity(85.77 mg/g).The results of X-ray photoelectron spectroscopy analysis showed that the mechanisms of Re immobilization by NZVI/r GOs included adsorption and reduction,which are significant to the prediction and estimation of the effectiveness of reductive Tc O_4^- by NZVI/r GOs in the natural environment.

关键词： reductive immobilization Re(VII) NZVI/r GOs plasma technique

Nanoscale zero-valent iron/magnetite carbon composites for highly efficient immobilization of U(Ⅵ)

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Journal of Environmental Sciences 2019年第2期31卷 377-387页

作者： Zhimin Lv Shimin Yang Lei chen Ahmed Alsaedi Tasawar Hayat changlun chen School of Chemistry and Chemical Engineering Shandong University of Technology CAS Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Plasma PhysicsChinese Academy of Sciences NAAM Research Group Faculty of ScienceKing Abdulaziz University Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University

Nanoscale zerovalent iron/magnetic carbon(NZVI/MC) composites were successfully synthesized by simply calcining yellow pine and iron precursors. NZVI/MC pyrolyzed at 800°C(NZVI/MC800) had a higher percentage of NZVI and displayed better resistance to aggregation and oxidation of NZVI than samples prepared at other temperatures. The NZVI/MC800 material was applied for the elimination of U(Ⅵ) from aqueous solutions. The results suggested that the NZVI/MC800 displayed excellent adsorption capacity(203.94 mg/g)toward U(Ⅵ). The significant adsorption capacity and fast adsorption kinetics were attributed to the presence of well-dispersed NZVI, which could quickly reduce U(Ⅵ) into U(Ⅳ), trapping the guest U(Ⅳ) in the porous biocarbon matrix. The removal of U(Ⅵ) on the NZVI/MC samples was strongly affected by solution pH. The NZVI/MC samples also displayed outstanding reusability for U(Ⅵ) removal after multiple cycles. These findings indicate that NZVI/MC has great potential for remediation of wastewater containing U(Ⅵ).

关键词： U(VI) Carbon NZVI Adsorption mechanism Reduction

Recent development of catalytic strategies for sustainable ammonia production

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Chinese Journal of Chemical Engineering 2023年第10期62卷 65-113页

作者： Supeng Yu Ting Xiang Njud SAlharbi Bothaina AAl-aidaroos changlun chen Institute of Plasma Physics HFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Institute of Energy Hefei Comprehensive National Science Center(Anhui Energy Laboratory)Hefei 230000China Department of Biological Sciences Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Presently,ammonia is an ideal candidate for future clean *** Haber-Bosch process has been an essential ammonia production process,and it is one of the most important technological advancements since its invention,sustaining the explosive growth of military munitions industry and fertilizers in the first half of the 20th ***,the process is facing great challenges:the growing need for ammonia and the demands of environmental *** energy consumption and high CO_(2) emissions greatly limit the application of the Haber-Bosch method,and increasing research efforts are devoted to"green"ammonia ***,electrocatalytic,and photocatalytic ammonia production under mild conditions and the derived chemical looping and plasma ammonia production methods,have been widely *** and photocatalytic methods,which use low fossil fuels,are naturally being considered as future directions for the development of ammonia *** their catalytic efficiency of ammonia generation is not yet sufficient to satisfy the actual demands,considerable progress has been made in terms of regulating structure and morphology of catalyst and improving preparation *** chemical looping approach of ammonia production differs from the thermocatalytic,electrocatalytic,and photocatalytic methods,and is the method of reusing raw *** plasma treatment approach alters the overall ammonia production approach and builds up a new avenue of development in combination with thermal,photocatalytic,and electrocatalytic methods as *** review discusses several recent effective catalysts for different ammonia production methods and explores mechanisms as well as efficiency of these catalysts for catalytic N2fixation of ammonia.

关键词： Thermocatalytic ammonia production Electrocatalytic,and photocatalytic ammonia production Thermodynamics process Electrochemistry Multiphase reaction

Investigation of radionuclide ^(60)Co(Ⅱ) binding to TiO_2 by batch technique,surface complexation model and DFT calculations

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Science China Chemistry 2012年第9期55卷 1752-1759页

作者： REN XueMei YANG ShiTong TAN XiaoLi chen changlun WANG XiangKe Key Laboratory of Novel Thin Film Solar Cells Institute of Plasma PhysiesChinese Aeademy qf SciencesHefei 230031China

The interaction between radionuclides and solid/water interfaces is important to understand the physicochemical processes of radionuclides in the natural ***,the interaction of 60Co(Ⅱ) with TiO 2 in aqueous solution as a function of pH and ionic strength was studied by using batch technique combined with surface complexation model and density functional theory(DFT) *** batch experimental results showed that the adsorption of 60Co(Ⅱ) was dependent on pH and independent of ionic strength,indicating the formation of inner-sphere surface complexes on TiO 2 *** results of surface complexation models and DFT calculations indicated that the surface species of 60Co(Ⅱ) adsorbed on TiO 2 followed the trend:B structure(i.e.,60Co(Ⅱ) was linked to one bridge oxygen site) was the dominant surface species at low pH,and TT structure(i.e.,60Co(Ⅱ) was linked to two terminal oxygen sites) became the important surface complex at neutral and alkaline pH *** results demonstrated that a multi-technique approach could lead to definitive information on the structures of adsorbed 60Co(Ⅱ) at the molecular level at the TiO 2 /water interfaces,as well as realistic models to rationalize and accurately evaluate the macroscopic manifestations of radionuclide adsorption phenomena.

关键词： radionuclide ^60Co(Ⅱ) TiO2 interaction surface complexation model DFT calculations

Plasma-facilitated modification of pumpkin vine-based biochar and its application for efficient elimination of uranyl from aqueous solution

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Plasma Science and Technology 2019年第9期21卷 101-109页

作者： Jinxin YI Zhipeng HUO Xiaoli TAN changlun chen Jiaxing LI Key Laboratory of Photovolatic and Energy Conservation Materials Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People's Republic of China University of Science and Technology of China Hefei 230026 People's Republic of China School of Environment and Chemical Engineering North China Electric Power University Beijing 102206 People's Republic of China Chemistry Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia

An acrylic modified pumpkin vine-based biochar(p-PVB-PAA) is synthesized by non-thermal plasma-grafting modification of pumpkin vine-based biochar(PVB) for the removal of uranyl from an aqueous solution. Microscopic characterization reveals that compared to PVB the surface of p-PVBPAA has more oxygen-containing functional groups by strong chemical bonding and the specific surface area is increased to 275.3 m^2 g^-1 from 3.8 m^2g^-1. It is found that p-PVB-PAA showed a much higher maximum adsorption capacity for uranyl from aqueous solutions than PVB, which were207.02 mg g^-1 and 67.58 mg g^-1 at pH=5 and 298 K, respectively. Moreover, the adsorption behavior follows a pseudo-second-order kinetics model and the Langmuir adsorption ***, macroscopic experiments and spectroscopic studies verified that the significantly improved adsorption performance of the p-PVB-PAA is due to surface complexation and electrostatic interactions. Furthermore, the very high removal efficiency and excellent regeneration ability(the percentage of the removal still remained at nearly 90% after five cycles) makes this low-cost, easily obtained, and environmentally friendly material attractive for commercial application.

关键词： biochar modification plasma treatment adsorption uranyl

覆盆子化学成分的分离鉴定及其新型大麻素2型受体激动剂的筛选和抗骨质疏松作用评价

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中草药 2024年第2期55卷 386-401页

作者：陈昌伦胡思婧朱丽丽姚璐蒙王星星张安娜张巧艳秦路平吴建军浙江中医药大学药学院浙江杭州311402

目的以大麻素2型受体(cannabinoid receptor type 2,CB2R)为靶点,从补肾中药覆盆子中分离、鉴定、筛选得到具有激动CB2R的激动剂,并探讨其抗骨质疏松作用的机制。方法以激动CB2R活性为导向进行分离并筛选,采用正相硅胶柱色谱、凝胶柱... 详细信息

目的以大麻素2型受体(cannabinoid receptor type 2,CB2R)为靶点,从补肾中药覆盆子中分离、鉴定、筛选得到具有激动CB2R的激动剂,并探讨其抗骨质疏松作用的机制。方法以激动CB2R活性为导向进行分离并筛选,采用正相硅胶柱色谱、凝胶柱色谱、大孔树脂、重结晶和半制备型高效液相色谱对二氯甲烷层和醋酸乙酯层浸膏进行分离,结合化合物理化性质和核磁共振波谱对分离得到的化合物进行结构鉴定。通过双荧光素酶方法筛选出具有可特异性激动CB2R的化合物,并通过测定转染CB2R的人胚胎肾细胞HEK293-CB2内环磷酸腺苷(cyclic adenosine monophosphate,c AMP)积聚水平和CB2R蛋白表达情况来验证筛选的化合物对CB2R的特异性激动活性,最后评价筛选得到的化合物对破骨细胞骨代谢方面的调节作用。结果以激动CB2R为活性导向进行分离和筛选,共得到24个化合物,分别鉴定为山柰酚(1)、木犀草苷(2)、银椴苷(3)、金丝桃苷(4)、橙皮素(5)、刺芒柄花素(6)、槲皮素(7)、对羟基苯甲酸(8)、迷迭香酸(9)、对羟基苯甲酸乙酯(10)、水杨酸(11)、没食子酸(12)、咖啡酸(13)、原儿茶酸(14)、鞣花酸(15)、香草酸(16)、loliolide(17)、对羟基苯甲酸甲酯(18)、ethyl dioxindole-3-acetate(19)、苦莓苷F1(20)、科罗索酸(21)、委陵菜酸(22)、山楂酸(23)、野鸦椿酸(24)。双荧光素酶筛选体系从24个化合物中筛选得到2个新的CB2R激动剂(化合物5和8)。c AMP和蛋白免疫印迹表明筛选得到化合物5和8对CB2R具有特异性激动活性和较好的亲和力,可显著抑制破骨细胞的活性并影响其骨吸收功能。结论化合物2、5、6、9、13、14、17、19为首次从中药覆盆子中分离得到。2个新的CB2R激动剂(化合物5和8)能特异性地激动CB2R并增加CB2R蛋白的表达,抑制给药刺激后HEK293-CB2细胞内c AMP的积累;以CB2R依赖性对破骨细胞功能的正常发挥产生影响。

关键词：掌叶覆盆子大麻素2型受体激动剂抗骨质疏松橙皮素对羟基苯甲酸甲酯木犀草苷刺芒柄花素

Synthesis of novel nanomaterials and their application in efficient removal of radionuclides

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Science China Chemistry 2019年第8期62卷 933-967页

作者： Xiangxue Wang Long chen Lin Wang Qiaohui Fan Duoqiang Pan Jiaxing Li Fangting Chi Yi Xie Shujun Yu chengliang Xiao Feng Luo Jun Wang Xiaolin Wang changlun chen Wangsuo Wu Weiqun Shi Shuao Wang Xiangke Wang Key Laboratory of Resources and Environmental Systems Optimization Ministry of EducationCollege of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing 102206China China Academy of Engineering Physics Mianyang 621900China State Key L aboratory of Radiation Medicine and Protection School of Radiation Medicine and ProtectionCollaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Key Laboratory of Petroleum Resources Gansu ProvinceNorthwest Institute of Eco-Environment and Resources. Chinese Academy of SciencesLanzhou 730000China Radiochemistry Laboratory School of Nuclear Science and TechnologyLanzhou UniversityLanzhou 730000China CAS Key Laboratory of Photovoltaic and Energy Conservation Materials. Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031China Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory Southwest University of Science and Technology Mianyang 621010China State Key Laboratory of Nuclear Resources and Environment School of BiologyChemistry and Material Science East China University of TechnologyFuzhou 344000China College of Materials Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001China China Academy of Engineering Physics Mianyang 621900China

With the development of nuclear energy, large amounts of radionuclides are inevitably released into the natural environment. It is necessary to eliminate radionuclides from wastewater for the protection of environment. Nanomaterials have been considered as the potential candidates for the effective and selective removal of radionuclides from aqueous solutions under complicated conditions because of their high specific surface area, large amounts of binding sites, abundant functional groups, pore-size controllable and easily surface modification. This review mainly summarized the recent studies for the synthesis, fabrication and surface modification of novel nanomaterials and their applications in the efficient elimination and solidification of radionuclides,and discussed the interaction mechanisms from batch experiments, spectroscopy analysis and theoretical calculations. The sorption capacities with other materials, advantages and disadvantages of different nanomaterials are compared, and at last the perspective of the novel nanomaterials is summarized.

关键词： nanomaterials radionuclides removal preconcentration interaction mechanism

Erratum on “Reductive immobilization of Re(Ⅶ) by graphene modified nanoscale zero-valent iron particles using a plasma technique” [*** Chem.,2016,59:150–158]

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Science China Chemistry 2020年第2期63卷 290-290页

作者： Jie Li changlun chen Rui Zhang Xiangke Wang Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow UniversitySuzhou 215123China School for Radiological and Interdisciplinary Sciences(RAD-X) Soochow UniversitySuzhou 215123China NAAM Research Group Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

We regret that our article "Reductive immobilization of Re(Ⅶ) by graphene modified nanoscale zero-valent iron particles using a plasma technique"(Sci. China Chem., 2016, 59:150–158)[1] contained errors. The correcti... 详细信息

关键词： graphene Re(Ⅶ) modified

Sorption of Eu(Ⅲ) on GMZ bentonite in the absence/presence of humic acid studied by batch and XAFS techniques

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Science China Chemistry 2010年第6期53卷 1420-1428页

作者： HU Jun1,2,XIE Zhi3,HE Bo3,SHENG GuoDong1,chen changlun1,LI JiaXing1,chen YiXue2 & WANG XiangKe1 1Key Laboratory of Novel Thin Film Solar Cells Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China 2School of Nuclear Science and Engineering,North China Electric Power University,Beijing 102206,China 3National Synchrotron Radiation Laboratory,University of Science & Technology of China,Hefei 230029,China Key Laboratory of Novel Thin Film Solar Cells Institute of Plasma Physics Chinese Academy of Sciences Hefei China School of Nuclear Science and Engineering North China Electric Power University Beijing China National Synchrotron Radiation Laboratory University of Science & Technology of China Hefei China

Bentonite has been extensively studied because of its strong sorption ability and low *** this work,the Na-bentonite from Gaomiaozi County (China) has been characterized by XRD,FTIR and acid-base *** sorption of Eu(III) on Na-bentonite in the absence/presence of humic acid (HA) was studied at T = 25 ± 2 °C and in 0.01 mol/L NaClO4 *** effects of pH,HA,contact time and initial Eu(III) concentrations were also *** results indicate that the sorption of Eu(III) on Na-bentonite was dependent on pH *** presence of HA had little effect on Eu(III) sorption at low pH values,but decreased Eu(III) sorption at high pH values.X-ray absorption fine structure spectroscopy (XAFS) was applied to characterize the local structural environment of the adsorbed Eu(III) on bare Na-bentonite and HA-bentonite *** re- sults indicate that Eu(III) was bound to O atoms at a distance of about 2.39  at pH *** results are crucial for the evalua- tion of the sorption and migration of other trivalent lanthanides and actinides in bentonite as backfill materials.

关键词： Na-bentonite Eu(III) sorption humic acid XAFS

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动物屠宰加工过程及检疫措施

畜牧兽医科学（电子版） 2020年第13期 167-168页

作者：陈昌伦四川省广安市武胜县石盘镇畜牧兽医站广安638400

肉类食品在市场中占比较多,人们对于肉类食品的需求量日渐增多。但是近年肉类食品问题层出不穷,因此,对于动物屠宰检疫在肉食品安全中凸显重要作用,这也是保障消费者的生命安全的一道防线。该文主要论述动物屠宰加工过程及屠宰检疫措施。

关键词：动物屠宰检疫措施