期刊
CHEMOSPHERE
卷 71, 期 11, 页码 2113-2120出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2008.01.016
关键词
charcols; PAHs; sorption; LFER; pore filling; pi-pi EDA
Sorption of three polycyclic aromatic hydrocarbons (PAHs, phenanthrene, anthracene and pyrene) on three charcoals and their precursor substance (sawdust) was studied. The charcoals obtained by heating at 400 degrees C for different periods were different in chemical composition and structure. Sorption characteristics were described by a Polanyi-Dubinin-Manes model combined with poly-parameter linear free energy relationships. The results revealed that though partition could not be neglected for sawdust and charcoal containing large sawdust residue, adsorption controlled the sorption of PAHs on matured charcoals, where pi-pi electron donor-acceptor (EDA) exerted as the main molecular-scale interactions. Charring elevated partition coefficients (K-oc) of the three PAHs more than one order of magnitude, which ranged from 10(5.74) to 10(6.58) on charcoals (for PAHs at equilibrium concentration C-e = 0.005S(w)). Adsorption increased with the aromaticity of the charcoals, however, polar aromatic structure may stimulate sorption of PAHs due to the presence of pi-pi EDA interactions. (C) 2008 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据