Abstract:
A new waste material, characterized by low cost, availability and ligno cellulose composition, was tested for its
ability to remove reactive dyes from aqueous systems or environments. This paper continues our studies concerning
utilisation of sawdust as low-cost sorbent for decolourization of different textile effluents which contain synthetic textile
dyes with a high molecular weight. In this context, kinetic and thermodynamic studies were carried out in order to
establish all favourable conditions to uptake of Orange 16 reactive dye from aqueous solution of pH =1 by using batch
technique. The kinetics of adsorption of Orange 16 reactive dye are following a pseudo-second order model. The values of
thermodynamic parameters, DG and DH, were calculated using Langmuir constant (KL) and showed a spontaneous and
exothermic sorption process. The results indicate that waste of wood (like sawdust) is an attractive sorbent for removing
reactive dyes from the wastewater.
Keywords:
Orange 16 reactive dye, sawdust, sorption, kinetic, thermodynamic study
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