Sorption of organic contaminants by biopolymers: role of polarity, structure and domain spatial arrangement

Chemosphere
Xilong WangBaoshan Xing

Abstract

Sorption behavior of hydrophobic organic contaminants (HOCs) (i.e., pyrene, phenanthrene and naphthalene) by native and chemically modified biopolymers (lignin, chitin and cellulose) was examined. Lignins (native and treated) showed nonlinear sorption for all compounds studied, emphasizing their glassy character. Chitins and celluloses had linear isotherms for phenanthrene and naphthalene, illustrating the dominance of partitioning, while pyrene yielded nonlinear isotherms. Sorption capacity (K(oc)) of HOCs was negatively correlated with the polarity [(O+N)/C] of the biopolymers. Aromatic and alkyl+aromatic C percentages, rather than alkyl C content, demonstrated a better correlation with K(oc) values, indicating the importance of aromatic structures for HOC affinity. Hydrophobicity (K(ow))-normalized K(oc) values decreased sharply with increasing percentage of O-alkyl C versus total aliphatic C (O-alkyl C/total aliphatic C) or with polar C/(alkyl+aromatic C) ratio of the biopolymers until their values reached 80% and 4, respectively, illustrating the effect of surrounding polar groups on reducing affinity for HOCs. Overall, the results of this study highlight the role of spatial arrangement of domains within biopolymers in sor...Continue Reading

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Citations

Sep 21, 2011·Environmental Science & Technology·Xilong WangBaoshan Xing
Sep 6, 2012·Environmental Science & Technology·James G LongstaffeAndré J Simpson
Nov 16, 2013·Environmental Science and Pollution Research International·Zemin Xi, Baoliang Chen
Dec 17, 2014·Journal of Environmental Sciences (China)·Lixia ZhaoZhengtao Liu
Aug 17, 2012·Journal of Environmental Sciences (China)·Rabih SaadJalal Hawari
Dec 17, 2015·Journal of Agricultural and Food Chemistry·Eloana BonfleurJussara Borges Regitano
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Jul 2, 2011·Environmental Pollution·Guixiang ZhangYe Zhao
Jan 3, 2015·Environmental Pollution·Dainan ZhangKlaus Schmidt-Rohr
Dec 13, 2012·The Science of the Total Environment·Esmaeil ShahsavariAndrew S Ball
Aug 7, 2012·Chemosphere·James G LongstaffeAndré J Simpson
Dec 25, 2013·Soil & Sediment Contamination·Dogus MericAkram N Alshawabkeh
Jun 21, 2016·Environmental Science & Technology·Dainan ZhangYong Ran
Jul 11, 2008·Environmental Toxicology and Chemistry·Huiyu SunJingdong Mao
Jun 25, 2008·Journal of Environmental Quality·Charisma LattaoRobert L Cook
Dec 30, 2016·Environmental Science and Pollution Research International·Lu HanMengfang Chen
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Jun 24, 2009·Environmental Science & Technology·Marco Keiluweit, Markus Kleber
Sep 15, 2009·Environmental Science & Technology·Xilong WangBaoshan Xing
Jan 22, 2009·Journal of Agricultural and Food Chemistry·Yungui Li, Baoliang Chen
Mar 21, 2008·Environmental Science & Technology·Michal Shechter, Benny Chefetz
May 17, 2021·Chemosphere·Yafeng LiangCuiping Wang

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