The inelastic collision of protons with sodium atoms are treated for the first time within the framework of the coupledstatic and frozen core approximations. The method is used for calculating partial and total cross-...The inelastic collision of protons with sodium atoms are treated for the first time within the framework of the coupledstatic and frozen core approximations. The method is used for calculating partial and total cross-sections with the assumption that only two channels（elastic and hydrogen formation in 2s state） are open. In each case, the calculations are carried out for seven values of the total angular momentum l（0≤ l≤ 6）. The target is described using the Clementi Roetti wave functions within the framework of the one valence electron model. We use Lipmann–Swinger equation to solve the derived equations of the problem, then apply an iterative numerical method to obtain the code of computer to calculate iterative partial cross-sections. This can be done through calculating the reactance matrix at different values of considered energies to obtain the transition matrix that gives partial and total cross sections. The present results for total hydrogen（2s state）formation cross sections are in agreement with results of other available ones in wide range of incident energy.展开更多
Catalytic reduction of nitrate in groundwater by sodium formate over the catalyst was investigated.Pd-Cu/c-Al2O3 catalyst was prepared by impregnation and charac-terized by brunauer-emmett-teller(BET),inductive couple...Catalytic reduction of nitrate in groundwater by sodium formate over the catalyst was investigated.Pd-Cu/c-Al2O3 catalyst was prepared by impregnation and charac-terized by brunauer-emmett-teller(BET),inductive coupled plasma(ICP),X-ray diffraction(XRD),transmission electron microscopy(TEM)and energy dispersive X-ray(EDX).It was found that total nitrogen was effectively removed from the nitrate solution(100 mg/L)and the removal efficiency was 87%.The catalytic activity was affected by pH,catalyst amount used,concentration of sodium formate,and initial concentration of nitrate.As sodium formate was used as reductant,precise control in the initial pH was needed.Exces-sively high or low initial pH(7.0 or 3.0)reduced catalytic activity.At initial pH of 4.5,catalytic activity was enhanced by reducing the amount of catalyst,while concentrations of sodium formate increased with a considerable decrease in N2 selectivity.In which case,catalytic reduction followed the first order kinetics.展开更多
文摘The inelastic collision of protons with sodium atoms are treated for the first time within the framework of the coupledstatic and frozen core approximations. The method is used for calculating partial and total cross-sections with the assumption that only two channels（elastic and hydrogen formation in 2s state） are open. In each case, the calculations are carried out for seven values of the total angular momentum l（0≤ l≤ 6）. The target is described using the Clementi Roetti wave functions within the framework of the one valence electron model. We use Lipmann–Swinger equation to solve the derived equations of the problem, then apply an iterative numerical method to obtain the code of computer to calculate iterative partial cross-sections. This can be done through calculating the reactance matrix at different values of considered energies to obtain the transition matrix that gives partial and total cross sections. The present results for total hydrogen（2s state）formation cross sections are in agreement with results of other available ones in wide range of incident energy.
基金This study was supported by the Science and Technology Cooperation Foundation between Nankai University and Tianjin University of Ministry of Education of China.
文摘Catalytic reduction of nitrate in groundwater by sodium formate over the catalyst was investigated.Pd-Cu/c-Al2O3 catalyst was prepared by impregnation and charac-terized by brunauer-emmett-teller(BET),inductive coupled plasma(ICP),X-ray diffraction(XRD),transmission electron microscopy(TEM)and energy dispersive X-ray(EDX).It was found that total nitrogen was effectively removed from the nitrate solution(100 mg/L)and the removal efficiency was 87%.The catalytic activity was affected by pH,catalyst amount used,concentration of sodium formate,and initial concentration of nitrate.As sodium formate was used as reductant,precise control in the initial pH was needed.Exces-sively high or low initial pH(7.0 or 3.0)reduced catalytic activity.At initial pH of 4.5,catalytic activity was enhanced by reducing the amount of catalyst,while concentrations of sodium formate increased with a considerable decrease in N2 selectivity.In which case,catalytic reduction followed the first order kinetics.
