eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2017-09-25 14 3 1103 1116 10.13005/bbra/2548 27863 article A. Abu-Rizaiza 1 M.W. Kadi 2 M.S. El-Shahawi 2 Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, Saudi Arabia. Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O.Box 80203, Jeddah 21589, Saudi Arabia. Activated carbons (AC) prepared from volatile fly ash (FA) of heavy fuel oil via gasification with combined steam - CO₂ was characterized and used as a low- cost adsorbent for removal of chlorophenols (CPs) e.g. 2-chlorophenol (2-CP), 4-chlorophenol (4-CP), and 2,4,6- tetra chlorphenol (TCP) in water. At pH< 2.0, maximum CPs uptake was achieved and the average half-life time (t_1/2) of the equilibrium adsorption of CPs was in the range 0.80 ± 0.01- 1.1 ± 0.04 h. Data suggested use of AC in packed column for separation and determination of various concentrations (0.5-100 µgL^-1) of CPs in water (0.5-1.0 L).  Complete extraction and recovery (97.4 + 2.9 %, n=5) of CPs were achieved at 2 mL min^-1 flow rate. Analysis of CPs spiked onto tap- and seawater were also analyzed by AC packed column and the results were compared with the standard HPLC method at 95% confidence (P-0.05, n=5).  The experimental student t test (texp 1.81-1.93) and F (Fexp 1.21-5.76) values were lower than the tabulated t (tcrit. = 2.78) and F (6.38), respectively. AC packed column provides remarkable selectivity, reproducibility, and cost-effectiveness towards removal and/ or determination of CPs. AC adsorbent may serve positively in point-of-care use. https://www.biotech-asia.org/vol14no3/activated-carbon-from-fly-ash-of-heavy-fuel-oil-characterization-and-its-utilization-for-removal-and-determination-of-chlorophenonls-in-water/ Activated Carbon; Adsorption;  Chlorophenols Removal; Fly Ash;HPLC; Water