Evaluation of Adsorption Capacity of Chitosan-Citral Schiff Base for Wastewater Pre-Treatment in Dairy Industries
Journal Title: Ecologia Balkanica - Year 2017, Vol 9, Issue 1
Abstract
In this study, we aimed to evaluate the adsorption capacity of the Schiff base chitosan-citral for its application in dairy wastewater pre-treatment. Chemical oxygen demand (COD) reduction was the factor used to evaluate the adsorption efficiency. The maximum COD percentage reduction of 35.3% was obtained at 40.0 °C, pH 9.0, adsorbent dose 15 g L-1, contact time 180 min and agitation speed 100 rpm. It was found that the Langmuir isotherm fitted well the equilibrium data of COD uptake (R2 = 0.968), whereas the kinetic data were best fitted by the pseudo-second order model (R2=0.999). Enhancement of the adsorption efficiency up to 29.8% in dependence of the initial COD concentration of the dairy wastewater was observed by adsorption with the Schiff base chitosan-citral adsorbent compared to the non-modified chitosan at the same experimental conditions. The results indicated that the Schiff base chitosan-citral can be used for dairy wastewater physicochemical pre- treatment by adsorption, which might be applied before the biological unit in the wastewater treatment plant to reduce the load.
Authors and Affiliations
Desislava Tsaneva, Milena Nikolova, Tsvetko Prokopov, Albena Stoyanova, Panteley Denev
Keywords
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