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Recent Progress in Developing Crystalline Ion Exchange Materials for the Removal of Radioactive Ions

Chinese Journal of Structural Chemistry 2020年第12期39卷 2157-2171,2056页

作者：唐俊豪孙海燕马文冯美玲黄小荥 State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

The nuclear fuel cycle inevitably generates a large amount of radioactive waste liquid,which will pose a serious threat to the ecological environment and human health.Ion exchange method has received wide attention for its easy operation,low cost and no secondary pollution.However,the effective removal of radioactive ions from complex solutions still remains a serious challenge due to their environmental mobility and radiotoxicity.We have developed an efficient strategy to construct crystalline ion-exchange materials by inducing layered or three-dimensional microporous anionic frameworks by organic cations that can be effectively exchanged by radioactive metal ions.This type of materials can be applied effectively to the removal of radioactive ions from complex solutions and the removal mechanism has been deeply clarified by means of single crystal structure analyses,theoretical calculations,etc.This review summarizes our recent progress in the study of synthesis,structures and properties of radioactive ion removals for such type of crystalline ion-exchange materials.

关键词： ion exchange crystalline materials metal chalcogenide vanadate MOF organic amine radionuclide remediation

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Profile improvement during CO_2 flooding in ultra-low permeability reservoirs

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Petroleum Science 2014年第2期11卷 279-286页

作者： Zhao Fenglan Zhang Lei Hou Jirui Cao Shujun Research Institute of Enhanced Oil Recovery China University of Petroleum Key Laboratory of Enhanced Oil Recovery CNPC Key Laboratory of Petroleum Engineering Ministry of Education

Gas flooding such as CO2 flooding may be effectively applied to ultra-low permeability reservoirs, but gas channeling is inevitable due to low viscosity and high mobility of gas and formation heterogeneity. In order to mitigate or prevent gas channeling, ethylenediamine is chosen for permeability profile control. The reaction mechanism of ethylenediamine with CO2, injection performance, swept volume, and enhanced oil recovery were systematically evaluated. The reaction product of ethylenediamine and CO2 was a white solid or a light yellow viscous liquid, which would mitigate or prevent gas channeling. Also, ethylenediamine could be easily injected into ultra-low permeability cores at high temperature with protective ethanol slugs. The core was swept by injection of 0.3 PV ethylenediamine. Oil displacement tests performed on heterogeneous models with closed fractures, oil recovery was significantly enhanced with injection of ethylenediamine. Experimental results showed that using ethylenediamine to plug high permeability layers would provide a new research idea for the gas injection in fractured, heterogeneous and ultra-low permeability reservoirs. This technology has the potential to be widely applied in oilfields.

关键词： Ethylenediamine organic amine profile improvement ultra-low permeability reservoirs,mitigation of gas channeling CO2 flooding

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THE SYNERGISTIC INHIBITION STUDIES OF SEVERAL amineS AND CHLORIDE ION ON IRON IN THE ACIDIC PERCHLORIDE SOLUTIONS

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 952-957页

作者： J.H.Dong 1) ,J.Y.Chen 2,3) and. C.N.Cao 1) 1) State Key Laboratory for Corrosion and Protection of Metals, Institute of Corrosion and Protection of Metals, The Chinese Academy of Sciences, Shenyang 110015, China 2) The International Center

The effect of chloride ion on the corrosion inhibition of iron caused by dencylamine(DA), dipentylamine(DDA) and dodecylamine(DPA) has been investigated by measuring the inhibitory coefficients for the anodic and cathodic processes at corrosion potential. It has been shown that the major synergistic inhibition effects between amines and chloride ions occur in the cathodic process, very weak in the anodic process. The anodic inhibition mechanism follows the competing adsorptive model, while the cathodic inhibition mechanism follows the cooperative adsorptive model.

关键词： synergistic inhibition organic amine chloride ion

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