Impacts of charcoal characteristics on sorption of polycyclic aromatic hydrocarbons

被引：68

作者：

Sun, Hongwen ^{[1
]}

Zhou, Zunlong ^{[1
]}

机构：

[1] Nankai Univ, Coll Environm Sci & Engn, Minist Educ, Key Lab Environm Pollut Proc & Stand, Tianjin 300071, Peoples R China

来源：

CHEMOSPHERE | 2008年 / 71卷 / 11期

基金：

中国国家自然科学基金;

关键词：

charcols; PAHs; sorption; LFER; pore filling; pi-pi EDA;

D O I：

10.1016/j.chemosphere.2008.01.016

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

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.

引用

页码：2113 / 2120

页数：8

共 36 条

[21] Competition between phenanthrene, chrysene, and 2,5-dichlorobiphenyl for high-energy adsorption sites in a sediment [J].

Morelis, Simone ;

van den Heuvel, Henny ;

van Noort, Paul C. M. .

CHEMOSPHERE, 2007, 68 (11) :2028-2032

[22] Absorption and adsorption of hydrophobic organic contaminants to diesel and hexane soot [J].

Nguyen, TH ;

Ball, WP .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (09) :2958-2964

[23] Polyparameter linear free energy relationships for estimating the equilibrium partition of organic compounds between water and the natural organic matter in soils and sediments [J].

Nguyen, TH ;

Goss, KU ;

Ball, WP .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (04) :913-924

[24] Sorption of organic compounds to activated carbons. Evaluation of isotherm models [J].

Pikaar, Ilje ;

Koelmans, Albert A. ;

van Noort, Paul C. M. .

CHEMOSPHERE, 2006, 65 (11) :2343-2351

[25] An isotope exchange technique to assess mechanisms of sorption hysteresis applied to naphthalene in kerogenous organic matter [J].

Sander, M ;

Pignatello, JJ .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (19) :7476-7484

[26]

Schwarzenbach RP, 2003, ENV ORGANIC CHEM

[27] Modeling maximum adsorption capacities of soot and soot-like materials for PAHs and PCBs [J].

Van Noort, PCM ;

Jonker, MTO ;

Koelmans, AA .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2004, 38 (12) :3305-3309

[28] Sorption of organic contaminants by biopolymer-derived chars [J].

Wang, Xilong ;

Xing, Baoshan .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2007, 41 (24) :8342-8348

[29] Competitive sorption of pyrene on wood chars [J].

Wang, Xilong ;

Sato, T. ;

Xing, Baoshan .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (10) :3267-3272

[30] Polanyi-based models for the competitive sorption of low-polarity organic contaminants on a natural sorbent [J].

Xia, GS ;

Ball, WP .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2000, 34 (07) :1246-1253

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