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采用壳上具有纳米孔的中空SiO2微球从溶液中吸附重金属Cd(II)离子,研究了被吸附溶液的pH值、Cd(II)离子初始浓度、吸附时间等对吸附Cd(II)离子的影响。结果表明,壳上具有纳米孔的中空SiO2微球可用于从溶液中吸附Cd(II)离子。在pH>3的弱酸性溶液中比在pH≤3的酸性条件下中空SiO2微球吸附Cd(II)离子的量要大得多。Cd(II)离子初始浓度小于0.4 mol.L-1时,Cd吸附量随Cd(II)离子初始浓度的影响较小,进一步增大Cd(II)离子初始浓度,吸附量大幅攀升。
Adsorption of heavy metal Cd (II) ions from the solution by using hollow silica microspheres with nano-pores on the shell, the adsorption of Cd (II) ions on the adsorption of Cd (II) ions by the pH value of the solution, initial concentration of Cd influences. The results show that hollow SiO2 microspheres with nanopores on the shell can be used to adsorb Cd (II) ions from the solution. Hollow SiO2 microspheres adsorbed Cd (II) ions much more strongly in acidic solutions with pH> 3 than at pH≤3. When the initial concentration of Cd (II) ions was less than 0.4 mol·L-1, the amount of Cd adsorption decreased with the initial concentration of Cd (II) ions and the initial concentration of Cd (II) ions increased further.