Adsorption of lead ions on immobilized humic acid membrane
1991
Seki, H. (Hokkaido Univ., Hakodate (Japan). Faculty of Fisheries) | Suzuki, A. | Maruyama, H.
A study of lead recovery from dilute solution was conducted. Humic acid was immobilized by a calcium alginate gel membrane that contained activated carbon powder (HA-gel membrane). Static adsorption data were compared with the organo-metallic complexation model proposed in a preceding paper. Results indicated that the complexation constants and the complexation capacities of lead-humic acid and lead-alginic acid systems were not influenced by immobilization. On a wet weight basis, HA-gel membrane had twice as much lead adsorption capacity as the HA-gel particle. Results of the kinetic adsorption experiments showed that the rate of lead adsorption by the HA-gel membrane was much faster than that of the Ha-gel particle. HA-gel membrane was rapidly regenerated by washing with 0.1 mol.dm(-3) nitric acid
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