Nonlinear and competitive sorption of apolar compounds in black carbon-free natural organic materials

Journal of Environmental Quality
Joseph J PignatelloBaoshan Xing

Abstract

Numerous studies have reported a spectrum of sorption phenomena in soils, sediments, and organic matter isolates of those materials that are inconsistent with a partition model proposed in the late 1970s and early 1980s, a model predicated on a hypothesis that sorption is linear and noncompetitive. To explain these nonideal phenomena, prior studies have proposed a hard-soft (glassy-rubbery) model for SOM (soil and sediment organic matter), while others have attributed them singularly to BC (black carbon: soot and charcoal) particles present in topsoils and sediments. In this study, we demonstrated nonideal sorption behavior (isotherm nonlinearity, competitive effects) for a group of apolar compounds in a large set of natural and model organic materials, including a commercial lignin and humic acids from different sources. Complete oxidation of samples by an acidic dichromate method was taken to signify the absence of BC. (However, polymethylene units are stable even if functionalized on both ends, making the technique unreliable for quantifying BC.) Other samples were inferred free of BC by their source and method of preparation. Characterization by thermalanalytical methods indicated the glassy character of the organic materia...Continue Reading

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Citations

Oct 17, 2008·Environmental Science and Pollution Research International·Bo PanBaoshan Xing
May 31, 2012·Environmental Science & Technology·Katherine Young Bell, Eugene J Leboeuf
Jun 27, 2013·Proceedings of the National Academy of Sciences of the United States of America·Chia-Ching ChuManfredo J Seufferheld
Dec 17, 2014·Journal of Environmental Sciences (China)·Lixia ZhaoZhengtao Liu
Mar 8, 2011·Chemosphere·Baohua Xiao, Weilin Huang
Jul 10, 2010·Journal of Environmental Sciences (China)·Chengxia JiaGang Pan
Feb 9, 2008·Environment International·Ajit K SarmahFrank F Scherr
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Apr 18, 2016·Environmental Pollution·Thorsten Hüffer, Thilo Hofmann
Apr 19, 2016·The Science of the Total Environment·Ashour A AhmedOliver Kühn
Dec 12, 2013·The Science of the Total Environment·Prakash SrinivasanMerilyn Manley-Harris
Apr 8, 2014·Environmental Technology·G S M Hossain, R G McLaughlan
Feb 19, 2017·Ecotoxicology and Environmental Safety·J M Marín-BenitoM J Sánchez-Martín
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Nov 1, 2020·The Science of the Total Environment·Liufen RenKun Yang
Jun 19, 2009·Environmental Science & Technology·Satoshi EndoTorsten C Schmidt
Apr 17, 2009·Environmental Science & Technology·Benny Chefetz, Baoshan Xing
Sep 5, 2008·Environmental Science & Technology·Satoshi EndoTorsten C Schmidt
Jul 23, 2008·Journal of Agricultural and Food Chemistry·M Sonia Rodríguez-CruzM Jesús Sánchez-Martín
Jan 5, 2011·Environmental Science & Technology·Guido Bronner, Kai-Uwe Goss

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