Al(OH)_3 modified nickel slag adsorbent was prepared by sintering technology. The structure of the sample was characterized by BET, XRD, IR, SEM and EDAX. The sample's adsorption performance of Pb^(2+) and Cu^(...Al(OH)_3 modified nickel slag adsorbent was prepared by sintering technology. The structure of the sample was characterized by BET, XRD, IR, SEM and EDAX. The sample's adsorption performance of Pb^(2+) and Cu^(2+) from aqueous solution was studied. Results indicated that the adsorbent is a loose and porous mesoporous material. Its surface had mass aluminosilicate, high-activity γ-Al_2O_3 and its p H ranges from 4 to 12 that all have negative charges. The BET surface of the adsorbent is 23.90 m^2/g. Furthermore, its surface contains rich oxygenic functional groups, which could not only provide abundant adsorption sites for Pb^(2+) and Cu^(2+), but also improve the adsorption performance of Pb^(2+) and Cu^(2+) from waste water through the complexation of heavy metal ions. The best p H values selected in the adsorption of Pb^(2+) and Cu^(2+) are 6 and 5, respectively. With the increase of the initial concentration of simulated solution, the adsorption capacities of Pb^(2+) and Cu^(2+) gradually increased but the removal rates showed a downward trend. The competitive adsorption results of Pb^(2+) and Cu^(2+) showed that Pb^(2+) has better preferential adsorption than Cu^(2+).展开更多
基金Supported by the National Natural Science Foundation of China(Nos.51102047&51472050)
文摘Al(OH)_3 modified nickel slag adsorbent was prepared by sintering technology. The structure of the sample was characterized by BET, XRD, IR, SEM and EDAX. The sample's adsorption performance of Pb^(2+) and Cu^(2+) from aqueous solution was studied. Results indicated that the adsorbent is a loose and porous mesoporous material. Its surface had mass aluminosilicate, high-activity γ-Al_2O_3 and its p H ranges from 4 to 12 that all have negative charges. The BET surface of the adsorbent is 23.90 m^2/g. Furthermore, its surface contains rich oxygenic functional groups, which could not only provide abundant adsorption sites for Pb^(2+) and Cu^(2+), but also improve the adsorption performance of Pb^(2+) and Cu^(2+) from waste water through the complexation of heavy metal ions. The best p H values selected in the adsorption of Pb^(2+) and Cu^(2+) are 6 and 5, respectively. With the increase of the initial concentration of simulated solution, the adsorption capacities of Pb^(2+) and Cu^(2+) gradually increased but the removal rates showed a downward trend. The competitive adsorption results of Pb^(2+) and Cu^(2+) showed that Pb^(2+) has better preferential adsorption than Cu^(2+).