期刊
WATER RESOURCES AND INDUSTRY
卷 16, 期 -, 页码 29-36出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.wri.2016.10.001
关键词
Activated carbon; Two stage self-generated atmosphere; 2,4-Dichlorophenol; Guava seeds; Kinetics
资金
- Centre of Research & Innovation, Universiti Malaysia Sabah [SGK0031-ST-2015]
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 degrees 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 m(2) 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.
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