Isolation and characterization of different organic matter fractions from a same soil source and their phenanthrene sorption

Environmental Science & Technology
Ke SunBaoshan Xing

Abstract

Four humic acids (HAs) including de-ashed HAs (D-HAs), two humins (HMs), nonhydrolyzable carbons, and demineralized fraction (DM) were isolated separately from two soils and characterized detailedly; then their sorption of phenanthrene (Phen) was examined. The sequence of removal of HAs and minerals affected molecular composition of HMs. After de-ashing, thermal stability of HAs was improved; however, sorption (logKoc) also decreased due to removal of amorphous alkyl-C. Significant correlations between CO2 surface area of HAs with their sorption coefficients (n and Koc) suggested that pore filling could dominate Phen sorption. Alkyl-C could facilitate elevated thermal stability of OM and Phen sorption, supporting that thermal stability of OM was correlated with Phen sorption. The OM fraction composed of aromatic moieties (AMs) did not produce the highest logKoc, providing strong evidence to dispute the dominant role of AMs in Phen sorption. No correlations between the Koc values of Phen by all tested sorbents and their bulk or surface polarity were observed, suggesting that the role of bulk or surface polarity of OM fractions in regulating Phen sorption was dependent on soil sources. This work shows the major influence of bulk ...Continue Reading

References

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May 25, 2002·Environmental Science & Technology·Myrna J SalloumPatrick G Hatcher
Feb 5, 2003·Environmental Science & Technology·Washington J BraidaBaoshan Xing
Sep 10, 2004·Journal of Environmental Quality·Jin Hur, Mark A Schlautman
Jan 14, 2005·Journal of Environmental Quality·Kaijun Wang, Baoshan Xing
Jan 26, 2005·Environmental Science & Technology·Seunghun Kang, Baoshan Xing
Jun 6, 2006·Environmental Science & Technology·Xiaojuan FengMyrna J Simpson
Jun 2, 2007·Environmental Science & Technology·Bei WenBaoshan Xing
Jul 7, 2007·Environmental Science & Technology·Yong RanEddy Zeng
Apr 16, 2008·Environmental Science & Technology·Ke SunBaoshan Xing
Apr 17, 2009·Environmental Science & Technology·Benny Chefetz, Baoshan Xing
May 1, 1995·Environmental Science & Technology·C T Chiou

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Citations

Jan 21, 2014·Environmental Science and Pollution Research International·Hong SuiGuozhong Wu
Jan 31, 2017·Environmental Science & Technology·Jie JinBaoshan Xing
Oct 17, 2017·Environmental Science and Pollution Research International·Sarah GreishJan H Christensen
Mar 29, 2018·Environmental Science and Pollution Research International·Huilan ShiWenhao Pang
Jul 23, 2019·Environmental Pollution·Xiao XiaoChao Yang
Nov 1, 2020·The Science of the Total Environment·Liufen RenKun Yang
Dec 21, 2016·Environmental Science & Technology·Lanfang HanBaoshan Xing
Sep 4, 2014·Environmental Science & Technology·Lanfang HanBaoshan Xing

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