Coconut frond as adsorbent for removal of malachite green dye

This study represents the use of coconut frond (CF) to remove malachite green dye. This type of dye is toxic and will cause severe problems to environment. investigation \nwas carried out by studying the effects of various experimental parameters, such as adsorbent size (0.125, 0.300 and 0.710 µm), adsorbent dosage (0.1, 0.3, 0.5, 0.7, 1.0 and 3.0 g), initial dye concentration (10, 30, 50, 70, 100, 200, 300 and 400 mg/L), contact time (are 4, 8, 12, 16, 20 and 24 hours) and pH (pH 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10). The results showed that the coconut frond has the highest percentage of dye removal which is up to 99.91 % under optimum condition. The experimental data was analyzed with the Langmuir and Freundlich adsorption isotherm equations. The Langmuir isotherm model has given a better conformity than the Freundlich model with 18.98 mg/g as maximum adsorption capacity at 16 hours. This study indicates that coconut frond could be employed as a low cost adsorbent for the removal of the textile dyes from effluents.