This paper suggested a modified model of SLM which could improve its stability.In the model, an organic solution was sandwiched between two layers of supported film,which we called sandwich supported liquid membrane(S...This paper suggested a modified model of SLM which could improve its stability.In the model, an organic solution was sandwiched between two layers of supported film,which we called sandwich supported liquid membrane(SSLM).The transport experiments of La3+ were performed with SSLM containing HEH(EHP)as a carrier. The permeability coefficient (p) of La3+ were measured and some factors affecting the p were investigated. The results showed that if the pH of the feed was below 4.0,the p was increased with increasing in pH. The p was also increased when the strip acidity increases.Inspite of not enough satisfactory reproducibility on test result, the stability of the model was improved.展开更多
The extraction of La￣(3+) with hollow fiber sandwich liquid membrane was described in present paper. The theoretical equations of mass transport for this system were deduced. The permeability coefficient p of mass tr...The extraction of La￣(3+) with hollow fiber sandwich liquid membrane was described in present paper. The theoretical equations of mass transport for this system were deduced. The permeability coefficient p of mass transport and its related factors were observed experimentally. The p value was increased with increase of pH in the feed and became constant under the condition of pH over 4. The p value was the highest when the flow rate was at 30 ml/min. The value of the coefficient was lower than that of single hollow fiber supported liquid membrane under the same conditions, but the stability and concentrated capacity of the sandwich membrane was better.展开更多
A novel idea of transport of yttrium(Ⅲ) metal ions through fibers supported liquid membrane in two stage processes namely source to membrane and membrane to receiving phase has been proposed.The fibers supported liqu...A novel idea of transport of yttrium(Ⅲ) metal ions through fibers supported liquid membrane in two stage processes namely source to membrane and membrane to receiving phase has been proposed.The fibers supported liquid membrane was impregnated with different concentrations carrier.The experimental variables explored were concentration of yttrium(Ⅲ) ions,pH of source phase,PC-88A concentration in membrane phase,acid concentration in receiving phase and stirring speed.The pre-concentration of yttrium(Ⅲ) ions ...展开更多
文摘This paper suggested a modified model of SLM which could improve its stability.In the model, an organic solution was sandwiched between two layers of supported film,which we called sandwich supported liquid membrane(SSLM).The transport experiments of La3+ were performed with SSLM containing HEH(EHP)as a carrier. The permeability coefficient (p) of La3+ were measured and some factors affecting the p were investigated. The results showed that if the pH of the feed was below 4.0,the p was increased with increasing in pH. The p was also increased when the strip acidity increases.Inspite of not enough satisfactory reproducibility on test result, the stability of the model was improved.
文摘The extraction of La￣(3+) with hollow fiber sandwich liquid membrane was described in present paper. The theoretical equations of mass transport for this system were deduced. The permeability coefficient p of mass transport and its related factors were observed experimentally. The p value was increased with increase of pH in the feed and became constant under the condition of pH over 4. The p value was the highest when the flow rate was at 30 ml/min. The value of the coefficient was lower than that of single hollow fiber supported liquid membrane under the same conditions, but the stability and concentrated capacity of the sandwich membrane was better.
基金supported by Department of Science and Technology,Government of India (GAP 271526)
文摘A novel idea of transport of yttrium(Ⅲ) metal ions through fibers supported liquid membrane in two stage processes namely source to membrane and membrane to receiving phase has been proposed.The fibers supported liquid membrane was impregnated with different concentrations carrier.The experimental variables explored were concentration of yttrium(Ⅲ) ions,pH of source phase,PC-88A concentration in membrane phase,acid concentration in receiving phase and stirring speed.The pre-concentration of yttrium(Ⅲ) ions ...
