The extraction method based on the reversible chemical complexation is highly effective and selective for separating polar organic solutes from dilute solutions,and the basicity of the extractant is one of the most im...The extraction method based on the reversible chemical complexation is highly effective and selective for separating polar organic solutes from dilute solutions,and the basicity of the extractant is one of the most important parameters affecting the extraction equilibrium.In this paper,the determination of basicity of Lewis basic extractant and its mixture solvent was first proposed on the basis of extraction behavior of HCl and the appropriate stoichiometric ratio of solute to extractant.The basicities of two Lewis basic chemicals,n-octy-lamine and di-n-butylamine,and some basicity of typical Lewis basic extractant mixture,trioctylamine(TOA)/1-octanol and trialkylphosphine oxide(TRPO)/kerosene,were measured at 25 ℃ by using this me-thod.The results show that this method was more accurate and simple,the basicity of Lewis basic chemicals was in agreement with the values reported in the literature,and the basicity of the mixture solvent depended on the extractant type and concentration.展开更多
Using TiOSO4 and iron as materials,a light catalyst with diameters varying between 40 to 70nm has been synthesized through the SAS process and is utilized to degrade a pharmaceutical wastewater.Under different conditi...Using TiOSO4 and iron as materials,a light catalyst with diameters varying between 40 to 70nm has been synthesized through the SAS process and is utilized to degrade a pharmaceutical wastewater.Under different conditions of combustion temperatures,sample pH values of sample,mole ratios of the mixed iron and stirring mode with aeration or supersonic wave as well as magnetic,the degradation effects on COD removal from the wastewater has been investigated.The nano-TiO2 has shown a higher catalytic activation at 600℃,and the removal rate of 80% or 72% is reached under conditions of pH of 4.5 and 3h of radiation with UV or sunshine respectively,while at pH of 2.0,the same treatment give 83% or 78% removal rate respectively.Under conditions of sunshine,600℃ and pH of 4.5,the nano-TiO2 mixed with iron of 0.8% get removal of 85%.The stirring mode has an influence on the COD removal,under the above conditions,stirring with aeration for 20min get a higher removal of 19% or 10% than that with supersonics wave or magnetic power,but after 40min,stirring with magnetic power get the highest removal rate.展开更多
文摘The extraction method based on the reversible chemical complexation is highly effective and selective for separating polar organic solutes from dilute solutions,and the basicity of the extractant is one of the most important parameters affecting the extraction equilibrium.In this paper,the determination of basicity of Lewis basic extractant and its mixture solvent was first proposed on the basis of extraction behavior of HCl and the appropriate stoichiometric ratio of solute to extractant.The basicities of two Lewis basic chemicals,n-octy-lamine and di-n-butylamine,and some basicity of typical Lewis basic extractant mixture,trioctylamine(TOA)/1-octanol and trialkylphosphine oxide(TRPO)/kerosene,were measured at 25 ℃ by using this me-thod.The results show that this method was more accurate and simple,the basicity of Lewis basic chemicals was in agreement with the values reported in the literature,and the basicity of the mixture solvent depended on the extractant type and concentration.
文摘Using TiOSO4 and iron as materials,a light catalyst with diameters varying between 40 to 70nm has been synthesized through the SAS process and is utilized to degrade a pharmaceutical wastewater.Under different conditions of combustion temperatures,sample pH values of sample,mole ratios of the mixed iron and stirring mode with aeration or supersonic wave as well as magnetic,the degradation effects on COD removal from the wastewater has been investigated.The nano-TiO2 has shown a higher catalytic activation at 600℃,and the removal rate of 80% or 72% is reached under conditions of pH of 4.5 and 3h of radiation with UV or sunshine respectively,while at pH of 2.0,the same treatment give 83% or 78% removal rate respectively.Under conditions of sunshine,600℃ and pH of 4.5,the nano-TiO2 mixed with iron of 0.8% get removal of 85%.The stirring mode has an influence on the COD removal,under the above conditions,stirring with aeration for 20min get a higher removal of 19% or 10% than that with supersonics wave or magnetic power,but after 40min,stirring with magnetic power get the highest removal rate.
