Bagasse fly ash as novel adsorbent for ionic dyes

Colored waste water contamination in natural resources due to natural and anthropogenic activities is becoming a world wide problem now a days. The toxic nature of several dyes is a serious threat to human health. Among several treating technologies adsorption has been recognized as a effective tool for color removal. In the present study Bagasse fly ash is evaluated for its adsorption efficiency towards model cationic, anionic and zwitterionic dyes. The equilibrium and kinetic experiments were performed in batch mode. The equilibrium data was fitted with Langmuir and Freundlich models. Several operation variables such as adsorbent dosage, contact time, initial pH, and temperature on the removal of dyes were investigated. The removal efficiency increased with increase in adsorbent dosage. The adsorption process followed pseudo second order kinetics. Thermodynamic parameters like DH°, DS° and DG° were analyzed. The processes were spontaneous for the ionic dyes. These results suggest that bagasse fly ash is a potential low cost industrial waste for textile industry waste water treatment containing ionic dyes.

Author(s): Ekta Khosla, Satindar Kaur and Pragnesh N. Dave

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