The pseudo-ternary system(Na Cl + Na_2SO_4+ H_2O) of coal gasification wastewater was studied at T =(268.15 to 373.15) K. The solubility and density of the equilibrium liquid phase were determined by the isothermal so...The pseudo-ternary system(Na Cl + Na_2SO_4+ H_2O) of coal gasification wastewater was studied at T =(268.15 to 373.15) K. The solubility and density of the equilibrium liquid phase were determined by the isothermal solution saturation method. The equilibrium solids were also investigated by the Schreinemaker's method of wet residues and X-ray powder diffraction(XRD). According to the experimental data, the phase diagrams were determined. It was found that there was no significant solubility difference on the Na Cl-rich side between the ternary system(Na Cl + Na_2SO_4+ H_2O) in coal gasification wastewater and in pure water. However, the solubility on the Na_2SO_4-rich side of coal gasification wastewater was apparently higher than that of pure water. The increase in the solubility of Na_2SO_4 was most likely caused by the effects of other impurities apart from Na Cl and Na_2SO_4 in coal gasification wastewater. The measured data and phase equilibrium diagrams can provide fundamental basis for salt recovery in coal gasification wastewater.展开更多
Salinity treatments （NaCl and Na2SO4） reduced plant growth and increased the accumulation of Na^＋, P^3＋,Fe^3＋ , Mn^2＋, and CIin root, stem, leaf and legume. The uptake of K^＋ reduced in the presence of both sal...Salinity treatments （NaCl and Na2SO4） reduced plant growth and increased the accumulation of Na^＋, P^3＋,Fe^3＋ , Mn^2＋, and CIin root, stem, leaf and legume. The uptake of K^＋ reduced in the presence of both salts whereas uptake of Ca^2＋ retarded mainly by Na2SO4. Chlorophyll content was affected mainly by NaCl, while Na2SO4 treatment lowered the rate of photosynthetic activity. Both salt compounds caused accumulation of free amino acids including free proline but reduced the protein content in the leaves. The salt tolerance capacity of the broad beans plant in which the observations of the effect of salinity determined by different concentrations of NaCI and Na2SO4 on growth, chloroplast pigments, photosynthetic, free amino acids, free proline, protein and inorganic elements on plants are combined with observations on growth and yield, in order to arrive at a better understanding of their salt tolerance, has been studied and discussed in this paper. The results for the latter only （fruiting stage） are presented.展开更多
The nano-MnO2 as active electrode material for supercapacitor was synt hesized by solid-state reaction between KMnO4 and manganese acetate at room temp erature. The products annealed at 100 ℃ and 200 ℃ were characte...The nano-MnO2 as active electrode material for supercapacitor was synt hesized by solid-state reaction between KMnO4 and manganese acetate at room temp erature. The products annealed at 100 ℃ and 200 ℃ were characterized by XRD an d TEM. The results showed the sample annealed at 100 ℃ was poorly crystallized phase with an average grain size of <20 nm. Electrochemical performances of mang anese oxide electrode were investigated by cyclic voltammetry and constant curre nt charge/discharge. The manganese oxide electrode annealed at 100 ℃ in 1 mol· L-1 Na2SO4 aqueous electrolyte exhibited excellent capacitive behavior between - 0.2 and +0.8 V (vs SCE). By 5 mA and 10 mA constant current charge/discharge, th e nano-MnO2 annealed at 100 ℃ can provide a specific capacitance of 158.5 F·g- 1 and 151.2 F·g-1, respectively.展开更多
基金Supported by the National Key Research and Development Program of China(2016YFB0600504)
文摘The pseudo-ternary system(Na Cl + Na_2SO_4+ H_2O) of coal gasification wastewater was studied at T =(268.15 to 373.15) K. The solubility and density of the equilibrium liquid phase were determined by the isothermal solution saturation method. The equilibrium solids were also investigated by the Schreinemaker's method of wet residues and X-ray powder diffraction(XRD). According to the experimental data, the phase diagrams were determined. It was found that there was no significant solubility difference on the Na Cl-rich side between the ternary system(Na Cl + Na_2SO_4+ H_2O) in coal gasification wastewater and in pure water. However, the solubility on the Na_2SO_4-rich side of coal gasification wastewater was apparently higher than that of pure water. The increase in the solubility of Na_2SO_4 was most likely caused by the effects of other impurities apart from Na Cl and Na_2SO_4 in coal gasification wastewater. The measured data and phase equilibrium diagrams can provide fundamental basis for salt recovery in coal gasification wastewater.
文摘Salinity treatments （NaCl and Na2SO4） reduced plant growth and increased the accumulation of Na^＋, P^3＋,Fe^3＋ , Mn^2＋, and CIin root, stem, leaf and legume. The uptake of K^＋ reduced in the presence of both salts whereas uptake of Ca^2＋ retarded mainly by Na2SO4. Chlorophyll content was affected mainly by NaCl, while Na2SO4 treatment lowered the rate of photosynthetic activity. Both salt compounds caused accumulation of free amino acids including free proline but reduced the protein content in the leaves. The salt tolerance capacity of the broad beans plant in which the observations of the effect of salinity determined by different concentrations of NaCI and Na2SO4 on growth, chloroplast pigments, photosynthetic, free amino acids, free proline, protein and inorganic elements on plants are combined with observations on growth and yield, in order to arrive at a better understanding of their salt tolerance, has been studied and discussed in this paper. The results for the latter only （fruiting stage） are presented.
文摘The nano-MnO2 as active electrode material for supercapacitor was synt hesized by solid-state reaction between KMnO4 and manganese acetate at room temp erature. The products annealed at 100 ℃ and 200 ℃ were characterized by XRD an d TEM. The results showed the sample annealed at 100 ℃ was poorly crystallized phase with an average grain size of <20 nm. Electrochemical performances of mang anese oxide electrode were investigated by cyclic voltammetry and constant curre nt charge/discharge. The manganese oxide electrode annealed at 100 ℃ in 1 mol· L-1 Na2SO4 aqueous electrolyte exhibited excellent capacitive behavior between - 0.2 and +0.8 V (vs SCE). By 5 mA and 10 mA constant current charge/discharge, th e nano-MnO2 annealed at 100 ℃ can provide a specific capacitance of 158.5 F·g- 1 and 151.2 F·g-1, respectively.
