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Journal of Applied Sciences
Year: 2010  |  Volume: 10  |  Issue: 21  |  Page No.: 2544 - 2550

Monoethanolamine Wastewater Treatment via Adsorption Method: A Study on Comparison of Chitosan, Activated Carbon, Alum and Zeolite

M.N. Razali, R.M. Yunus, Z. Jemaat and S. Alias    

Abstract: This research was conducted to evaluate the feasible methods to recycle and reuse the monoethanolamine (MEA) in the CO2 removal unit and at the same time, maintaining the amine concentration level. The adsorption performance of chitosan was compared to activated carbon, alum and zeolite. Amine contaminated waste water contains about 230,000 mg L-1 of COD, 69,000 mg L-1 of suspended solid, 596 mg L-1 of residue oil and 41% of amine concentration. Preliminary results showed that application of chitosan managed to reduce the COD by up to 83%, suspended solid by up to 57 and 95% for residue oil removal at the defined optimum experimental condition (weight of absorbent: 5%, contact time : 1 h, mixing rate: 100 rpm, ambient temperature : 25-30°C and pH 11). For activated carbon, alum and zeolite, the results showed reduction of COD by up to 80, 73 and 70%, suspended solid by up to 49, 43 and 38%, respectively. For residue oil removal, activated carbon was 87%, alum was 64% and zeolite was 46% at the same experiment conditions. In conclusion, chitosan showed the best adsorption performance followed by activated carbon, alum and zeolite.

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