Year: 2018 | Month: June | Volume 11 | Issue 3
Adsorption of Two Basic Dyes Methylene Blue and Malachite Green onto Low Cost Adsorbent Rice Husk Ash: A Batch Study
DOI:10.30954/0974-1712.06.2018.1
Abstract:
In the present study, rice husk ash an agricultural waste material was used as a low cost adsorbent for the removal of mixture of two basic dyes, widely used in the textile industries, methylene blue (MB) and malachite green (MG) from the aqueous solution. Batch study was conducted to investigate into the effect of different experimental parameters such as contact time, adsorbent dose, initial concentration and shaker speed for the removal of mixture of two dyes. Batch study showed that up to 90.95% removal of two dyes at dye concentration of 25mg/L and dose 48mg/L. An increase in concentration resulted in a greater dye removal from the aqueous solution. It was established from the kinetic study that the adsorption data followed the pseudo-second-order-kinetic model in a better way than the pseudo-first-order kinetic model. Isotherm study was conducted by using Langmuir, Freundlich and Temkin isotherm equation. Langmuir isotherm model described the experimental data quite well with high correlation coefficient and it was also supported by the five error functions. The results showed that rice husk ash has the potential to be used as an effective adsorbent for the removal of mixture of two basic dyes.
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