| Summary: | 碩士 === 中原大學 === 環境工程學系 === 106 === The objective of this study is to develop the activated carbon from sludge of sewage treatment to adsorb cationic contaminants including lead and dyes from aqueous solution. The obtained sludge formed powder through the pretreatment. The sample was calcined using physical activation process under 800oC and then acid wash by HCl. Finally, the activated carbon were copolymerized carboxylate salt by grafting process with acrylic acid. The samples were characterized using SEM, EDS, FTIR and nitrogen adsorption /desorption isotherms.
The SEM shows that the diameter of activated carbon is ranged from 10 to 100 micrometers. For EDS analysis, it was found that the main elements for the activated carbon were C and O. After grafting process, Na and Ce also was regarded as one of main elements. The FTIR demonstrated that the grafting procedure has successfully grafted the COOH functional groups on the activated carbon surface, increasing the adsorption capacities for the cationic contaminants.
For adsorption experiments, the maximum adsorption capacity was calculated using the Langmuir equation. The grafting process can effectively increase the adsorption capacity for cationic contaminants. The maximum adsorption capacities of ungrafted activated carbon for dye (MG5) and heavy metal (Pb2+) were 8.45 mg/g and 7.49 mg/g, respectively. Due to the increase in the COOH on the activated carbon, MG5 and Pb2+ can be adsorbed by the ion exchange. The maximum amounts of MG5 and Pb2+ on the grafted activated carbon were 65.4 mg/g and 101 mg/g, respectively.
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