Removal of chlorinated phenol from aqueous media by guava seed (Psidium guajava) tailored activated carbon

S. M., Anisuzzaman and Collin G., Joseph and D., Krishnaiah and A., Bono and Emma, Suali and Sariah, Abang and Fai, L. M. (2016) Removal of chlorinated phenol from aqueous media by guava seed (Psidium guajava) tailored activated carbon. Water Resources and Industry, 16. pp. 29-36. ISSN 2212-3717

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Abstract

In this study, the activated carbons (ACs) were prepared from guava seeds via two stages activation. The dried guava seeds were semi-carbonized at 300 °C for 1 h, and then the carbonized samples were impregnated with zinc chloride (ZnCl2). The ZnCl2: sample impregnation ratios (w/w) were altered from 1:1 to 5:1. The ACs were characterized by the yield percentage, ash content, moisture content, pH value, adsorption quality of 2,4-dichlorophenol (2,4-DCP) and surface functional groups. The surface area of the best produced AC3 was found to be 919.40 m2 g-1. It was found that AC3 had highest 2,4-DCP adsorption capacity, which was 20.9 mg g-1. The 2,4-DCP adsorption kinetic of prepared AC3 was pseudo-second order with correlation value of 0.995. In addition, the 2,4-DCP adsorption capacity of AC3 was fitted to the Langmuir model with correlation coefficient value of 0.977, indicating that chemisorption was a major contributor to the adsorption process. © 2016.

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