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Citation: LI Yan, JI Yong. Adsorption Behavior in Dual-solutes of Cr(Ⅵ) and p-Cresol by Mg-Al Hydrotalcite Compounds[J]. Chinese Journal of Applied Chemistry, ;2013, 30(8): 932-937. doi: 10.3724/SP.J.1095.2013.20361 shu

Adsorption Behavior in Dual-solutes of Cr(Ⅵ) and p-Cresol by Mg-Al Hydrotalcite Compounds

LI Yan ,
JI Yong

Department of Chemistry, Changzhi College, Changzhi 046011, China

Received Date: 20 August 2012
Revised Date: 10 September 2012

The adsorption behavior of Cr(Ⅳ) on Mg-Al hydrotalcite compounds(Mg-Al HTlc) was investigated in the metal-organic pollutant system of Cr(Ⅵ) and p-cresol. The results suggest that in the adsorption of Cr(Ⅵ) on HTlc is in the pseudo-second-order reaction and follows Langmuir isothermal adsorption equation;p-cresol can reduce the adsorption velocity but can increase the adsorption capacity of Mg-Al HTlc to adsorb Cr(Ⅵ) from water. Cr(Ⅵ) and p-cresol exhibit a competitive effect. On the one hand,the competitive effect is dependent to the concentration ratio of p-cresol to Cr(Ⅵ),the adsorption capacity of Mg-Al HTlc toward Cr(Ⅵ) can be increased by decreasing the pH value due to the adsorption of p-cresol on HTlc. The competitive ability of p-cresol decreases relatively with the increase of Cr(Ⅵ) concentration and the removal rate of Cr(Ⅵ) increases significantly when the mass concentration ratio of Cr(Ⅵ) to p-cresol is larger than 3. In addition,the adsorption capacity decreases with increasing temperature.
- Mg-Al hydrotalcite compounds,
- Cr(Ⅵ),
- p-cresol,
- adsorption
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