Title of article :
Methylene blue adsorption on graphene oxide/calcium alginate composites
Author/Authors :
Li، نويسنده , , Yanhui and Du، نويسنده , , Qiuju and Liu، نويسنده , , Tonghao and Sun، نويسنده , , Jiankun and Wang، نويسنده , , Yonghao and Wu، نويسنده , , Shaoling and Wang، نويسنده , , Zonghua and Xia، نويسنده , , Yanzhi and Xia، نويسنده , , Linhua، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
7
From page :
501
To page :
507
Abstract :
Graphene oxide has been used as an adsorbent in wastewater treatment. However, the dispersibility in aqueous solution and the biotoxicity to human cells of graphene oxide limits its practical application in environmental protection. In this research, a novel environmental friendly adsorbent, calcium alginate immobilized graphene oxide composites was prepared. The effects of pH, contact time, temperature and dosage on the adsorption properties of methylene blue onto calcium alginate immobilized graphene oxide composites were investigated. The equilibrium adsorption data were described by the Langmuir and Freundlich isotherms. The maximum adsorption capacity obtained from Langmuir isotherm equation was 181.81 mg/g. The pseudo-first order, pseudo-second order, and intraparticle diffusion equation were used to evaluate the kinetic data. Thermodynamic analysis of equilibriums indicated that the adsorption reaction of methylene blue onto calcium alginate immobilized graphene oxide composites was exothermic and spontaneous in nature.
Keywords :
Adsorption , Graphene oxide , Calcium Alginate , Methylene blue
Journal title :
CARBOHYDRATE POLYMERS
Serial Year :
2013
Journal title :
CARBOHYDRATE POLYMERS
Record number :
1624753
Link To Document :
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