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化学学报
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化学学报 ›› 1988, Vol. 46 ›› Issue (2): 172-175. 上一篇    下一篇

研究论文

Al2O3自电解质溶液中吸附CrO4^2^-的特性研究

木冠南;侯秀英   

  1. 云南大学化学系
  • 发布日期:1988-02-15

Characteristic study of adsorption of chromate anion from electrolytic solution on alumina

MU GUANNAN;HOU XIUYING   

  • Published:1988-02-15

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本文特别延长了pH范围(2-10),详细研究pH、温度、外加正负离子对CrO4^2^-吸附量的影响,说明这种吸附主要是以离子交换方式进行的,并认为表面活性点是产生这类吸附的重要原因.

关键词: 氧化铝, 吸附, 离子交换, 铬酸盐 P, 电解质, 表面活性, 阴离子

The adsorption isotherms of chromate (CrO42-) from electrolytic solution (0.01M NaCl) on Al2O3 were determine at various pH (2-10) and concns. Max. adsorption occurs at pH u4.5. Adsorption of chromate decreases to 0 near the PZC (pH 9). The presence of some anions tends to decrease chromate adsorption. The order is citrate > PO43- > SO42- > NO3-. The presence of some cation tends to increase chromate adsorption. The order is Ba2+ > Ni2+ > K+. Chromate adsorption is not influenced by temperature These results are explained and the adsorption mechanism is discussed.

Key words: ALUMINIUM OXIDE, ADSORPTION, ION EXCHANGING, CHROMATE P, ELECTROLYTE, SURFACE ACTIVITY, ANION

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