Effect of Various Parameters on Adsorption of Congo Red over Rice Husk (original) (raw)
2016, NFC-IEFR Journal of Engineering and Scientific Research
In this study rice husk has been used as an alternative adsorbent for the adsorption of Congo red from aqueous solution. Rice husk is low cost biodegradable adsorbent which is available at very low cost and shows promising results when exposed to Congo red in textile waste stream. Batch adsorption method at laboratory scale was used for the adsorption of Congo red from aqueous solution. Effect of contact time showed that maximum dye removal is achieved at 120 min. This time is the equilibrium time which was used to study the rest of parameters. Initial dye concentration, adsorbent concentration and temperature of the solution were studied and percent dye removal is calculated for each one. With the increase in adsorbate concentration (25 to 150 mg/l), percent removal of dye decreases but amount of dye adsorbed per unit mass of adsorbent increases. For the adsorbent concentration (0.20 to 1.2 g/50 ml), percent removal of dye had direct relationship and same is true for solution temperature (28 to 60 °C). Langmuir adsorption isotherm had been studied in detail and results of the above parameters had been analyzed. The results showed that rice husk could be used as an effective and low cost adsorbent for the removal of dyes from aqueous solution.
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