科研之友
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摘要
Nanomaterials are ideal adsorptive materials for trace element and have great potential. In this paper, the preparation of alpha-Al2O3 and its adsorptive and desorptive properties towards La3+ in aqueous phase were studied. The effect of pH, temperature and time on the adsorption of La3+ by nanoscale alpha-Al2O3 was discussed. The results showed that the adsorptive effect of the alpha-Al2O3 on La3+ is the best over the range of pH 5-7. Adsorptive rat: increases with increasing temperature, but the effect of temperature is not high. Thus, the adsorption is generally carried out at room temperature. When adsorptive time is 20 min, the adsorptive ratio is the highest and reaches 92.14 %. it is found for the studies of desorptive conditions that when 0.1 mol/L AcOH was used as an adsorbent, the desorptive effect of La3+ was better. When the desorption was 6 h, the desorptive ratio reached to 97.03 %.
- 出版日期2011-9
- 单位长春大学
