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Carbonization treatment successfully converted textile sludge into potential adsorbent. The carbonization was performed at the range of 400 to 800 °C without oxygen involved. In order to investigate the adsorption performance of carbonized sludge then a series of adsorption tests was carried out. Adsorption experiments indicated that the highest adsorption capacity was obtained at the carbonization temperature of 400 °C. The maximum adsorption capacity for removal textile dye of reactive red 231 on aqueous sollution was reached 49.1 mg/g. The pH of carbonized sludge played a significant role in the adsorption of reactive red 231 in the solution. Since the reactive red 231 is categorized as an anionic dyes, the lower pH was appropriate to accelerate adsorption process through charge neutralization by abundant H +  ions.

Recycling of textile sludge for removing textile dye of reactive red 231 on aqueous solution