1King Fahd University of Petroleum and Minerals 2King Fahd University of Petroleum and Minerals 3King Fahd University of Petroleum and Minerals 4King Fahd University of Petroleum and Minerals 5King Fahd University of Petroleum and Minerals 6King Fahd University of Petroleum and Minerals 7King Fahd University of Petroleum and Minerals
This work reports the syntheses of an inexpensive and efcient asphalt-derived mesoporous carbon (AdMC) as an adsorbent.
The adsorbent was activated with potassium hydroxide to increase its surface area and then characterized by SEM–EDS, FT-IR, and BET. The adsorption properties of AdMC were evaluated for the adsorptive removal of eleven Poly Aromatic Hydrocarbons (PAHs) and diesel from water samples. The prepared AdMC showed very high surface areas and high micropore volumes equal to 2316 m2 /g and 1.2 cm3 /g, respectively. Various experimental conditions infuencing the adsorp�tion capacity of eleven PAHs and diesel were investigated. At high concentrations, PAHs and diesel solubility in water is very low. Hence, samples were emulsifed with a surfactant, and then maximum adsorption capacity was investigated. Adsorption profle of individual PAHs was examined using gas chromatography/mass spectrometry analysis followed by liquid–liquid extraction. Total hydrocarbon removal was studied using a total organic analyzer. Asphalt-derived mesoporous sorbent showed an extreme ability to remove PAHs and diesel (average adsorption capacity of 166 mg/g for individual PAHs and diesel (maximum capacity of 1600 mg/g). The experimental results ftted the Langmuir model with a correlation efciency of 0.9853. The results obtained for both adsorbents also matched to pseudo-second-order kinetics, suggesting that the adsorp�tion of PAHs and diesel is chemical, monolayer, and homogeneous process.