Assessment of the biosorption characteristics of lychee (Litchi chinensis) peel waste for the removal of Acid Blue 25 dye from water

作者：Bhatnagar Amit^*; Minocha A K

来源：Environmental Technology, 2010, 31(1): 97-105.

DOI：10.1080/09593330903370000

• Acid Blue 25 dye
• lychee (Litchi chinensis)
• peel waste
• adsorbent
• equilibrium isotherms
• kinetic modelling

The aim of this study was to examine the adsorption potential of lychee (Litchi chinensis) peel waste for the removal of Acid Blue 25 dye from aqueous solutions. The adsorption was studied as a function of contact time, initial dye concentration and temperature by batch method. Equilibrium sorption isotherms showed that the lychee peel adsorbent possessed a high affinity and sorption capacity for Acid Blue 25, with a monolayer sorption capacity of ca. 200 mg g(-1). The equilibrium adsorption data were well described by the Langmuir model. Kinetic studies revealed that the present system of dye adsorption on lychee peel adsorbent could be described more favourably by the pseudosecond-order kinetic model. The thermodynamic parameters, namely free energy (Delta G degrees), enthalpy (Delta H degrees) and entropy (Delta S degrees) changes, were determined for the process. The results of the present study suggest that lychee peel waste can be used beneficially as an adsorbent in treating industrial effluents containing dyes.

• 出版日期2010