Adsorption of Fabric Dye from Synthetic Wastewater by using Agricultural Waste as Biosorbent
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ABSTRACT
The objective of this research was to study the appropriate conditions for the absorption efficiency of local agricultural wastes : corn cob, pomelo peel, pineapple peel and longan peel with the following factors, pH of synthetic wastewater, concentration of synthetic wastewater, absorption time, amount of absorbent material and suitability for absorption synthetic fabric dyes. The results showed that 4 types of agricultural wastes had different absorption efficiency and different absorption factors. It was found that corn cob had the best absorption efficiency of fabric dye. At the appropriate of pH 7, corn cob had an efficiency of 74%. The appropriate concentration of synthetic wastewater affecting the absorption efficiency of corn cob was 2 mg/l with an absorption efficiency of 83%. The amount of 1 g of absorbed material had an efficiency of 88%. The best absorption time of the corn cob was 15 minutes with an efficiency of 92%. The results of the study on the correlation of the absorption efficiency of each parameter showed that there was a relation between corn cob and longan peel in pH, concentration, absorbent content and time. Corn cob was the most appropriate material as the Pearson correlation coffeicient was 1 and its significant value was 0.00. The results of the study of agricultural waste materials used showed that pineapple peels had the lowest absorption efficiency of the waste materials at less than 70%
Keywords : synthetic wastewater, adsorption, fabric dye, corn cob, longan peel, pineapple peel, grapefruit peel
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