A recyclable copper removal adsorbent was developed from diatomite and alu- minum sludge composite materials. The. effects of different formulas on the adsorption of Cu2~ under different conditions were discussed. The...A recyclable copper removal adsorbent was developed from diatomite and alu- minum sludge composite materials. The. effects of different formulas on the adsorption of Cu2~ under different conditions were discussed. The properties and rnicrostructures of the samples were characterized. The results showed that the optimum pH value, contacting time and raw materials proportion for copper removal are 6, 90 min and 40：60 （sludge： diatomite）, respectively, The copper removal capacity could reach 0.46 mg/g at the initial copper concentration of 5 mg/L. There was no change in the composition of crystal phase before and after copper removal, so physical adsorption was dominant during the adsorption process.展开更多
Transport of copper ions through nanocomposite chitosan/polyvinyl alcohol thin adsorptive membranes has been mathematically investigated in the current study. Unsteady-state diffusive transport model was coupled with ...Transport of copper ions through nanocomposite chitosan/polyvinyl alcohol thin adsorptive membranes has been mathematically investigated in the current study. Unsteady-state diffusive transport model was coupled with the Freundlich isotherm to predict the concentration of the ions in dialysis permeation operation. Pristine model was not successful in predicting the experimental data based upon its low coefficients of determination（0.1展开更多
基金Supported by the National Natural Science Foundation of China (No.51102047)Fujian Natural Science Foundation for Distinguished Youth Scholars (2012J06011)National Undergraduate Practice Innovation Plan (121038632)
文摘A recyclable copper removal adsorbent was developed from diatomite and alu- minum sludge composite materials. The. effects of different formulas on the adsorption of Cu2~ under different conditions were discussed. The properties and rnicrostructures of the samples were characterized. The results showed that the optimum pH value, contacting time and raw materials proportion for copper removal are 6, 90 min and 40：60 （sludge： diatomite）, respectively, The copper removal capacity could reach 0.46 mg/g at the initial copper concentration of 5 mg/L. There was no change in the composition of crystal phase before and after copper removal, so physical adsorption was dominant during the adsorption process.
文摘Transport of copper ions through nanocomposite chitosan/polyvinyl alcohol thin adsorptive membranes has been mathematically investigated in the current study. Unsteady-state diffusive transport model was coupled with the Freundlich isotherm to predict the concentration of the ions in dialysis permeation operation. Pristine model was not successful in predicting the experimental data based upon its low coefficients of determination（0.1
