This research has studied the utilization of rubber wood fly ash for batik textiles wastewater treatment at 5-8 of pH value, 75-300 µm of fly ash size, 2-24 hours of contact time and 5-50 g/L of fly ash dose which effected on the adsorption efficiency of COD and dyestuff removal. The batch experiment results showed that the adsorption efficiency of COD and dyestuff removal was about 96 % and 98 % at the optimum conditions, pH 7, the total size of fly ash (no sieve) with 8.02 nm of average pore size and 65.03 m2/g of average surface area, 16 hours of contact time and 100 g/L of fly ash dose. The organic adsorption in term of COD by rubber wood fly ash was analyzed and fitted with Freundlich isotherm under R2 0.8828. This result correlated with the linear physical adsorption characteristic on the surface area of fly ash at gif.latex?\frac{1}{n} value of 1.0365.
Keywords
Fly ash, Adsorption, Batik wastewater, COD, Dyestuff
THE JOURNAL OF INDUSTRIAL TECHNOLOGY
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