The effects of counterions of citric acid and EDTA on the crystallization of calcium oxalate(CaO x )were in-vestigated in silica gel with a doubl e diffusion technique.The ability o f inhibiting the growth and aggrega...The effects of counterions of citric acid and EDTA on the crystallization of calcium oxalate(CaO x )were in-vestigated in silica gel with a doubl e diffusion technique.The ability o f inhibiting the growth and aggregation of CaO x crystal and the ability of inducing f ormation of COD follows:potassium c itratesodium citrate >citric acid.Na 2 EDTA had a stronger ability to inhibi t the aggregation of CaO x crystals than that of EDTA,but a weak er ability to inhibit nucleation and growth of C aO x crystals.Since COM exhibits a greater degree of attachment to renal tubule cells in culture compared with COD,t hat is,COD is easy to be expelled from the body along with the urine.So both inducing formation of COD and in hibiting growth and aggregation of CaO x crystal can decrease the probability of urinary stones.These results hav e positive significance in the prevention and cure of urinary stones clin ically.展开更多
The removal of phosphate from aqueous solution by Donnan dialysis with anion-exchange membrane was investigated.The results show that phosphate could be removed from aqueous solution without supplying external high pr...The removal of phosphate from aqueous solution by Donnan dialysis with anion-exchange membrane was investigated.The results show that phosphate could be removed from aqueous solution without supplying external high pressure or electrical potential.Under the conditions of influent phosphate of 2.0 mg/L,counterion(Cl-)concentration of 0.1 mol/L,stirring speed of 500 r/min and phase temperature of 298 K,the removal of phosphate achieves 70.0%.Decreasing counterion concentration has little influence on the removal of phosphate,but phosphate amount in anion-exchange membrane increases significantly.With the increase of stirring speed and phase temperature,the removal efficiency of phosphate greatly is improved.Existing forms of phosphate in aqueous solution affected transport of phosphate and only strong acidic pH of feed solution(pH=3.0)decreases the removal of phosphate.Transport of phosphate is also accompanied by change of pH value of feed solution.In consequence,it might be a promise potential process for phosphate advanced wastewater treatment,especially in the area where high salted nature water can be utilized.展开更多
文摘The effects of counterions of citric acid and EDTA on the crystallization of calcium oxalate(CaO x )were in-vestigated in silica gel with a doubl e diffusion technique.The ability o f inhibiting the growth and aggregation of CaO x crystal and the ability of inducing f ormation of COD follows:potassium c itratesodium citrate >citric acid.Na 2 EDTA had a stronger ability to inhibi t the aggregation of CaO x crystals than that of EDTA,but a weak er ability to inhibit nucleation and growth of C aO x crystals.Since COM exhibits a greater degree of attachment to renal tubule cells in culture compared with COD,t hat is,COD is easy to be expelled from the body along with the urine.So both inducing formation of COD and in hibiting growth and aggregation of CaO x crystal can decrease the probability of urinary stones.These results hav e positive significance in the prevention and cure of urinary stones clin ically.
基金Project(50778065)supported by the National Natural Science Foundation of China
文摘The removal of phosphate from aqueous solution by Donnan dialysis with anion-exchange membrane was investigated.The results show that phosphate could be removed from aqueous solution without supplying external high pressure or electrical potential.Under the conditions of influent phosphate of 2.0 mg/L,counterion(Cl-)concentration of 0.1 mol/L,stirring speed of 500 r/min and phase temperature of 298 K,the removal of phosphate achieves 70.0%.Decreasing counterion concentration has little influence on the removal of phosphate,but phosphate amount in anion-exchange membrane increases significantly.With the increase of stirring speed and phase temperature,the removal efficiency of phosphate greatly is improved.Existing forms of phosphate in aqueous solution affected transport of phosphate and only strong acidic pH of feed solution(pH=3.0)decreases the removal of phosphate.Transport of phosphate is also accompanied by change of pH value of feed solution.In consequence,it might be a promise potential process for phosphate advanced wastewater treatment,especially in the area where high salted nature water can be utilized.
