Adsorption of Two Cationic Dyes from Aqueous Solution onto Natural Attapulgite
The adsorption of two dyes, namely, cationic red XGRL and cationic brilliant blue RL onto natural attapulgite were studied, and adsorption mechanism was focused on from the view point of kinetics. Kinetic analysis showed that the adsorption processes of two cationic dyes on natural attapulgite obey the pseudo second-order model. The adsorption capacity of dyes was raised with temperature, but the equilibrium adsorption capacity of cationic brilliant blue RL was more than cationic red X-GRL. The activation energies of adsorption had also been evaluated with the pseudo-second-order. The result showed that the low activation energies indicate physical adsorption control process. Adsorption equilibrium data were well fitted by the Langmuir. From the results it can be concluded that the natural attapulgite could be a good adsorbent for treating cationic dyescontaminated waters.
adsorption cationic dyes attapulgite
Shaohua He Yang Zhou Zhipan Gu Shuibo Xie Xin Du
School of Urban Construction,University of South China SUC,USC Hengyang,China
国际会议
北京
英文
1-5
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）