摘要
这篇文章研究了pH值、温度、膨胀珍珠岩用量、吸附时间等因素对膨胀珍珠岩吸附金属离子效果的影响。实验结果表明:pH<5时,对Cu2+、Cr3+的吸附率随pH值的增大而逐渐增加;对Cu2+、Cr3+的由吸附率随温度的增大而逐渐降低;对Cu2+、Cr3+的由吸附率随吸附剂用量的增大而增加;对Cu2+、Cr3+的由吸附率随吸附时间的增加而增加,而后趋于不变。Cu2+、Cr3+的吸附平衡时间分别为4和3小时,吸附最佳温度为20℃。
The aim of the present work was to investigate the ability of expanded perlite to remove of copper and chromium ions from aqueous solutions.Batch adsorption experiments were carried out and the effect of pH, adsorbent dosage, contact time and temperature of solution on the removal process has been investigated. The results of experiments showed that adsorption of both metal ions increased by increasing pH values up to 5. Adsorption process was initially fast. The adsorption rate decreased then until reached to equilibrium concentration at 4 and 3hour for copper and chromium,respectively.The optimum temperature for the adsorption was found to be 20℃.
