Partitioning of phenanthrene by root cell walls and cell wall fractions of wheat (Triticum aestivum L.)

Environmental Science & Technology
Li ChenPeter Christie

Abstract

Plant cells have been reported to play an important role in the uptake of organic contaminants. This study was undertaken to provide an insight into the role of the root cell walls and their subfractions on sorption of phenanthrene to roots of wheat (Triticum aestivum L.). Root cell walls were isolated and further sequentially fractioned by removing pectin, hemicellulose one, and hemicellulose two. They were characterized by elemental analysis, Fourier transform infrared spectroscopy, and solid-state (13)C NMR. Root cell walls had a greater proportion of aromatic carbon and exhibited a lower polarity than the bulk roots. There was a stepwise increase in aromatic carbon content and a decrease in polarity following the sequential fractionation. The sorption affinity of phenanthrene increased gradually following the sequential extraction of root cells. A significant positive correlation between the sorption affinity K(OC) values and the aromatic carbon contents (r(2) = 0.896, p < 0.01) and a negative correlation between the sorption affinity K(OC) values and polarity ((O + N)/C) of root cell fractions (r(2) = 0.920, p < 0.01) were obtained. Improved modeling was achieved for phenanthrene sorption by involving the contribution of r...Continue Reading

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Citations

Mar 5, 2013·Environmental Science and Pollution Research International·Guangcai ChenGary Owens
Dec 1, 2015·Environmental Science & Technology·Elizabeth L MillerJoel A Pedersen
Jul 1, 2014·Environmental Toxicology and Chemistry·Stěpán ZezulkaMarie Kummerová
Jan 17, 2020·Integrated Environmental Assessment and Management·Xiaofei LvLinfei Hu

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