Abstract
Activated carbon (AC) was prepared from low rank Rawdon coal by chemical activation. The raw and demineralised coals were employed to produce ACs. The effects of demineralisation on the adsorption capacities of the ACs were determined, using common water pollutants, methylene blue (MB) and phenol as adsorbates. The BET (Brunauer-Emmett-Teller) surface area of the AC obtained from the demineralised sample (1869 m2 g−1) was found to be much higher than those obtained from the raw coal (1059 m2 g−1). Pre-carbonisation also caused an increase in the surface areas of the samples. The adsorption tests were evaluated using Langmuir and Freundlich adsorption models. The ACs were characterised in terms of total surface area, pore and particle size distributions, FTIR (Fourier Transform Infrared Spectroscopy) and XRF (X-ray Fluorescence) analyses. The surface area of the AC produced from the demineralised and pre-carbonised sample was determined as 1951 m2 g−1. The adsorption capacity of the same AC reached the highest values for MB (841.93 mg g−1) and phenol (549.6 mg g−1). The activated carbon produced in the research is an excellent adsorbent compared to other ACs reported in the literature.
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