Synthesis of highly efficient asphalt-based carbon for adsorption of polycyclic aromatic hydrocarbons and diesel from em
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Carbon Letters https://doi.org/10.1007/s42823-020-00126-0
ORIGINAL ARTICLE
Synthesis of highly efficient asphalt‑based carbon for adsorption of polycyclic aromatic hydrocarbons and diesel from emulsified aqueous phase Faisal M. Alissa1 · Dauda Mohammed2 · Abdalghaffar M. Osman1 · Chanbasha Basheer1 · Mohammad Nahid Siddiqui1 · Abdurrahman A. Al‑Arfaj1 · Munzir H. Suliman1 Received: 16 September 2019 / Revised: 10 December 2019 / Accepted: 26 January 2020 © Korean Carbon Society 2020
Abstract This work reports the syntheses of an inexpensive and efficient 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 influencing the adsorption capacity of eleven PAHs and diesel were investigated. At high concentrations, PAHs and diesel solubility in water is very low. Hence, samples were emulsified with a surfactant, and then maximum adsorption capacity was investigated. Adsorption profile 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 fitted the Langmuir model with a correlation efficiency of 0.9853. The results obtained for both adsorbents also matched to pseudo-second-order kinetics, suggesting that the adsorption of PAHs and diesel is chemical, monolayer, and homogeneous process. Keywords Activation of pores · Emulsification · Removal of diesel · Total organic hydrocarbons removal · Adsorption · Gas chromatography/mass spectrometry
1 Introduction There is a global concern on the widespread distribution and increase in the concentration of Polycyclic Aromatic Hydrocarbons (PAHs) in the environment [1]. PAHs are organic molecules consisting of two or more fused aromatic rings Electronic supplementary material The online version of this article (https://doi.org/10.1007/s42823-020-00126-0) contains supplementary material, which is available to authorized users. * Chanbasha Basheer [email protected] 1
Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
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[2] PAHs are ubiquitous and have been reported in water [3], food [4, 5], sediments and soil [6], dust [7], atmosphere and petroleum products [8]. They enter the environment due to anthropogeni
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