Absorption efficiency of Bromophenol Blue and Congo Red using King oyster mushroom (Pleurotus eryngii)

King oyster mushroom or its scientific name Pleurotus eryngii is an edible mushroom and it is widely available at local market. The potential of the expired King oyster mushroom as an alternative low-cost material for the removal of textile dyes in industrial effluents is explored. Absorption technique is used to optimize and to evaluate the absorption of Bromophenol Blue and Congo Red by the King oyster mushroom. The outcome of this study concludes that the optimum parameters for the absorption of Bromophenol Blue are 5 hours, pH 5 and 10 g of King oyster mushroom. On the contrary, the optimum parameters for the absorption of Congo Red by King oyster mushroom are 5 hours, pH 3 and 12 g of King oyster mushroom. The performance is attained by using heated King oyster mushroom as it achieves high degree of hydration of 0.4 at 5 hours. The King oyster mushroom portrays higher absorption of Congo Red than Bromophenol Blue at optimum conditions.