A method for removimg glucoraphenin from the extract of Radish pigmentby anion exchange resin 201 ×7 was studied. The adsorption capacity of201 ×7 resin for glucoraphenin was 72. 8mg/ ml resin, the equilibri...A method for removimg glucoraphenin from the extract of Radish pigmentby anion exchange resin 201 ×7 was studied. The adsorption capacity of201 ×7 resin for glucoraphenin was 72. 8mg/ ml resin, the equilibrium time55 minutes, and the optinum pH5. 5. All glucoluphenin that had been adsorbedon 201 × 7 resin was eluted by 1. 5BV. hr-1 eluent in whine concentration ofNaOH was 0. 05 mol·L-1 at the flow rate of 1. 5 BV/h. Extracting solutionof deglucoraphenin was enriched by vacuum and splay drying. A powder product of Radish pigment was obtained展开更多
Tannic acid and its related compounds are known as refractory organic pollutants, and it can create serious problems for the environment. The adsorption and desorption studies of tannic acid on commercial resins XAD-7...Tannic acid and its related compounds are known as refractory organic pollutants, and it can create serious problems for the environment. The adsorption and desorption studies of tannic acid on commercial resins XAD-7 and D-201 are performed, and all data indicates resin XAD-7 can be used as an effective adsorbent for removing tannic acid during water/wastewater treatment. Furthermore, adsorption thermodynamics studies indicate different adsorption mechanisms for TA on XAD-7 and D-201. FT-IR and solid state 13C-NMR spectroscopy are used to explain the adsorption force between XAD-7 and TA. It suggests that hydrogen bonding is the main adsorption force for TA. Finally, XAD-7＇s adsorption capacity in the presence of different metal ions is investigated, which indicates that heavy metal ions in solutions can decrease the adsorption capacity for TA on ester resin XAD-7.展开更多
Kinetics of chloride/sulfate,chloride/nitrate and nitrate/sulfate forward exchanges and reverse exchanges at solution concentrations of 1N,0.2N and 0.02 N on 201×7 strong base anion exchange resin,respectively,ha...Kinetics of chloride/sulfate,chloride/nitrate and nitrate/sulfate forward exchanges and reverse exchanges at solution concentrations of 1N,0.2N and 0.02 N on 201×7 strong base anion exchange resin,respectively,have been examined at 25℃.It is found that the forward and the reverse exchange rates of the two given ions at low solution concentration,respectively,under identical conditions can be controlled by different mechanisms,while those at high solution concentration are all controlled by particle diffusion.The ternary exchange rates of sulfate/(chloride+nitrate) and nitrate/(chloride+sulfate)have also been examined.展开更多
文摘A method for removimg glucoraphenin from the extract of Radish pigmentby anion exchange resin 201 ×7 was studied. The adsorption capacity of201 ×7 resin for glucoraphenin was 72. 8mg/ ml resin, the equilibrium time55 minutes, and the optinum pH5. 5. All glucoluphenin that had been adsorbedon 201 × 7 resin was eluted by 1. 5BV. hr-1 eluent in whine concentration ofNaOH was 0. 05 mol·L-1 at the flow rate of 1. 5 BV/h. Extracting solutionof deglucoraphenin was enriched by vacuum and splay drying. A powder product of Radish pigment was obtained
基金supported by the National Natural Science Fundation of China(No.50778088)China National Funds for Distinguished Young Scientists(No.50825802)
文摘Tannic acid and its related compounds are known as refractory organic pollutants, and it can create serious problems for the environment. The adsorption and desorption studies of tannic acid on commercial resins XAD-7 and D-201 are performed, and all data indicates resin XAD-7 can be used as an effective adsorbent for removing tannic acid during water/wastewater treatment. Furthermore, adsorption thermodynamics studies indicate different adsorption mechanisms for TA on XAD-7 and D-201. FT-IR and solid state 13C-NMR spectroscopy are used to explain the adsorption force between XAD-7 and TA. It suggests that hydrogen bonding is the main adsorption force for TA. Finally, XAD-7＇s adsorption capacity in the presence of different metal ions is investigated, which indicates that heavy metal ions in solutions can decrease the adsorption capacity for TA on ester resin XAD-7.
基金The project supported by National Natural Science Foundation of China.
文摘Kinetics of chloride/sulfate,chloride/nitrate and nitrate/sulfate forward exchanges and reverse exchanges at solution concentrations of 1N,0.2N and 0.02 N on 201×7 strong base anion exchange resin,respectively,have been examined at 25℃.It is found that the forward and the reverse exchange rates of the two given ions at low solution concentration,respectively,under identical conditions can be controlled by different mechanisms,while those at high solution concentration are all controlled by particle diffusion.The ternary exchange rates of sulfate/(chloride+nitrate) and nitrate/(chloride+sulfate)have also been examined.
