Equilibrium, kinetic and thermodynamic studies on the adsorption of phenol onto graphene
2012; Elsevier BV; Volume: 47; Issue: 8 Linguagem: Inglês
10.1016/j.materresbull.2012.04.021
ISSN1873-4227
AutoresYanhui Li, Qiuju Du, Tonghao Liu, Jiankun Sun, Yuqin Jiao, Yanzhi Xia, Linhua Xia, Zonghua Wang, Wei Zhang, Kunlin Wang, Hongwei Zhu, Dehai Wu,
Tópico(s)Adsorption and biosorption for pollutant removal
ResumoGraphene, a new member of carbon family, has been prepared, characterized and used as adsorbent to remove phenol from aqueous solution. The effect parameters including pH, dosage, contact time, and temperature on the adsorption properties of phenol onto graphene were investigated. The results showed that the maximum adsorption capacity can reach 28.26 mg/g at the conditions of initial phenol concentration of 50 mg/L, pH 6.3 and 285 K. Adsorption data were well described by both Freundlich and Langmuir models. The kinetic study illustrated that the adsorption of phenol onto graphene fit the pseudo second-order model. The thermodynamic parameters indicated that the adsorption of phenol onto graphene was endothermic and spontaneous.
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