Title of article :
Defluoridation from aqueous solution by manganese oxide coated graphene oxide
Author/Authors :
Li، نويسنده , , Yanhui and Du، نويسنده , , Qiuju and Wang، نويسنده , , Junjie and Liu، نويسنده , , Tonghao and Sun، نويسنده , , Jiankun and Wang، نويسنده , , Yonghao and Wang، نويسنده , , Zonghua and Xia، نويسنده , , Yanzhi and Xia، نويسنده , , Linhua، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Abstract :
A new adsorbent manganese oxide coated graphene oxide (MOGO) was synthesized and characterized by TEM, XRD, FTIR, and BET analysis. The effects of different parameters such as pH, adsorbent dose, contact time and temperature were studied to understand the adsorption behavior of the adsorbent under various conditions. Adsorption studies revealed that optimum removal of fluoride occurred in a pH range of 5.5–6.7. The Langmuir isotherm model demonstrated that the maximum fluoride adsorption capacity of MOGO was 11.93 mg/g and 8.34 times higher than that of GO. The kinetic adsorption data were analyzed using the pseudo first-order model, the pseudo second-order model and the intra-particle diffusion model. Thermodynamic adsorption results showed that adsorption of fluoride by MOGO was a spontaneous and endothermic process.
Keywords :
Graphene oxide , Defluoridation , manganese oxide , Adsorption , Kinetic modeling
Journal title :
Journal of Fluorine Chemistry
Journal title :
Journal of Fluorine Chemistry