Coal Bottom Ash and Activated Carbon for Removal of Vertigo Blue Dye in Batik Textile Waste Water: Adsorbent Characteristic, Isotherms, and Kinetics Studies



Batik is one of the textile industries which is growing very rapidly in Indonesia. However, the large amount of waste water produced is still a major problem of this industry. Adsorption processes are still an effective technology to treat the waste, especially in removing coloring agent. However, the study of adsorption kinetics and the use of coal bottom ash as an adsorbent is still limited. The aim of this study was to evaluate the adsorption capacity of coal bottom ash (CBA) in the removal of Vertigo blue 49 dye from textile wastewater and compare it with activated carbon. The optimum conditions of adsorption were determined by investigating the effect of contact time, pH (4, 7, 9) and initial concentration of dye (25 - 100 mg/L). The equilibrium data were analyzed using Langmuir and Freundlich isotherms to obtain the characteristic parameters of each adsorption model. Experimental data were also tested using adsorption kinetic models, which included both pseudo-first-order and pseudo second-order kinetic models. The optimum conditions were found to be an initial concentration of dye of 100 mg/L giving an adsorption capacity of 3.72 mg dye/g adsorbent for the adsorption of Vertigo blue onto commercial activated carbon (CAC) at pH 4 and 2.53 mg dye/g adsorbent for CBA sorbent at pH 9, respectively.


Coal based bottom ash (CBA), commercial activated carbon (CAC), adsorption, textile industry, bateeq

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Last updated: 17 May 2019