Adsorption of polycyclic aromatic hydrocarbons from water using petroleum coke-derived porous carbon

Journal of Hazardous Materials
Mingjiang YuanCharles Q Jia

Abstract

Porous carbons were prepared from petroleum coke by KOH chemical activation, characterized and used as adsorbents for uptaking a mixture of polycyclic aromatic hydrocarbons (PAHs): naphthalene, fluorene, phenanthrene, pyrene and fluoranthene from aqueous solutions. The specific surface area (SSA) of these carbons ranges from 562 to 1904 m2/g, while their point of zero charge (pH(PZC)) varies from 2.6 to 8.8. The equilibrium adsorption of PAHs on all four carbons follows the non-linear Freundlich equation well. For any given PAH in the group, the adsorption capacity parameter K(f), increases with the SSA and pH(PZC) of the carbons, confirming the roles of dispersive interactions. For any given carbon, the value of K(f) follows the order of naphthalene > fluorene > phenanthrene > pyrene. This dependence of K(f) on molecular size suggests a certain degree of molecular sieving behavior of these carbons toward large PAHs. Under the condition studied, the uptake process is likely controlled by diffusive transport processes. And, it is unlikely that the competitive adsorption played any important roles in determining equilibrium adsorption of the mixed PAHs. Overall, the petroleum coke-derived porous carbon is very effective in adsorb...Continue Reading

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Citations

Oct 18, 2011·Journal of Agricultural and Food Chemistry·Huoliang KongXuezhu Zhu
Jan 29, 2016·Chemosphere·Shanti LamichhaneRanjan Sarukkalige
Apr 17, 2013·Journal of Environmental Sciences (China)·Qianqian ShiBing Liu
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Apr 10, 2012·Journal of Hazardous Materials·Marian Asantewah NkansahGeorge William Francis
Apr 11, 2015·Environmental Science and Pollution Research International·Haiping GuJianming Xu
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Mar 2, 2018·Environmental Science and Pollution Research International·Dinushika EeshwarasingheSaravanamuthu Vigneswaran
Sep 7, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Le TongZhi Dang
Dec 16, 2019·Environmental Science and Pollution Research International·Lucas Mironuk FrescuraMarcelo Barcellos da Rosa
Jul 24, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Zhuoqi XuAiqun He
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Nov 27, 2021·The Science of the Total Environment·Shixi WuYinping Zhang

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