Research Article
Open Access
Caffeine removal using pretreated dead biomass of yeast Trichosporon sp. VITLN01 : Equilibrium, kinetics and thermodynamic studies
Lakshmi V1 and Nilanjana Das1*
1Bioremediation Laboratory, Environmental Biotechnology Division School of Biosciences
and Technology, VIT University, Vellore-632014, India
Nilanjana Das et al /Int.J. TechnoChem Res. 2020,6(1),pp 48-57.
Abstract
Dead biomass of yeast Trichosporon sp. VITLN01 pretreated with Tween 80, sodium
dodecylsulfate (SDS) and NaOH were used as adsorbents for caffeine removal from aqueous solution. In
batch system, maximum caffeine uptake was noted using Tween 80 treated adsorbent at pH 7.5 and
adsorption equilibrium time was 3 h. The Langmuir, Freundlich and Temkin adsorption models were
applied for mathematical description of adsorption equilibrium. Langmuir model was able to describe the
adsorption equilibrium of caffeine on native and pretreated adsorbents. Thermodynamics studies
indicated that caffeine adsorption process was spontaneous and exothermic in nature. SEM analysis
revealed interesting changes in the surface texture of pretreated adsorbents before and after caffeine
adsorption.Pretreated adsorbents immobilized in PVA-alginate matrix was used to remove caffeine from
coffee processing industrial wastewater. The present study confirmed that immobilized Tween 80 treated
dead biomass of yeast Trichosporon sp. VITLN01 may serve as efficient adsorbent for removal of
caffeine from industrial wastewater.
Keywords
Adsorption;Caffeine; Trichosporon sp. VITLN01; Tween 80; Industrial wastewater
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