This paper presents methods of modifying the active carbon with oxidizing agent and high temperature treatment.The ion exchange capacity of modified active carbon were detected.The active carbon has been amployed as a...This paper presents methods of modifying the active carbon with oxidizing agent and high temperature treatment.The ion exchange capacity of modified active carbon were detected.The active carbon has been amployed as an adsorbent for removing of Cr(Ⅲ) from equeous solution.The effect of removal of Cr(Ⅲ) of the pH of solution and time of adsorption were discussed.In addition,the mechanism of adsorption with modified the active carbon for Cr(Ⅲ) were discussed.展开更多
The transfer behavior of Cr（Ⅲ） through the emulsion liquid membrane system of TBP-Span80-atoleine -kerosene was studied.The effects of membrane phase component, pH value in external phase, concentration of H2SO4 in...The transfer behavior of Cr（Ⅲ） through the emulsion liquid membrane system of TBP-Span80-atoleine -kerosene was studied.The effects of membrane phase component, pH value in external phase, concentration of H2SO4 in internal phase,ratio of emulsion-water （R ew）and coexisting ions on the transport rate of Cr（Ⅲ） were investigated.The results showed that the transport rate of Cr（Ⅲ）could reach 99.5% under the optimun conditions of 7%TBP, 5%Span80, 4% atoleine, 84%kerosene, 1.0 mol·L -1 H2SO 4 in internal phase and pH 3.5 in external phase.This method was applied to the treatment of Cr（Ⅲ） waste-water, and the residual concentration of Cr（Ⅲ） could be reduced to 1.0 mg·L -1 ,which was below the national standard of waste-water discharge.展开更多
文摘This paper presents methods of modifying the active carbon with oxidizing agent and high temperature treatment.The ion exchange capacity of modified active carbon were detected.The active carbon has been amployed as an adsorbent for removing of Cr(Ⅲ) from equeous solution.The effect of removal of Cr(Ⅲ) of the pH of solution and time of adsorption were discussed.In addition,the mechanism of adsorption with modified the active carbon for Cr(Ⅲ) were discussed.
文摘The transfer behavior of Cr（Ⅲ） through the emulsion liquid membrane system of TBP-Span80-atoleine -kerosene was studied.The effects of membrane phase component, pH value in external phase, concentration of H2SO4 in internal phase,ratio of emulsion-water （R ew）and coexisting ions on the transport rate of Cr（Ⅲ） were investigated.The results showed that the transport rate of Cr（Ⅲ）could reach 99.5% under the optimun conditions of 7%TBP, 5%Span80, 4% atoleine, 84%kerosene, 1.0 mol·L -1 H2SO 4 in internal phase and pH 3.5 in external phase.This method was applied to the treatment of Cr（Ⅲ） waste-water, and the residual concentration of Cr（Ⅲ） could be reduced to 1.0 mg·L -1 ,which was below the national standard of waste-water discharge.
