Investigating roles of organic and inorganic soil components in sorption of polar and nonpolar aromatic compounds

Environmental Pollution
Xin ShiDongqiang Zhu

Abstract

The main objective of the present study was to assess the roles of various soil components in sorption of organic compounds differing in polarity. Removal of the whole soil organic matter decreased sorption by approximately 86% for nonpolar 1,3,5-trichlorobenzene (TCB), but only 34-54% for highly polar 1,3,5-trinitrobenzene (TNB); however, removal of the extractable humic/fulvic acids did not much affect sorption of the two sorbates. With normalization of solute hydrophobicity, TNB exhibits several orders of magnitude stronger sorption compared with TCB to maize burn residue (black carbon), extracted humic acid and Na(+)-saturated montmorillonite clay, suggesting specific sorptive interactions for TNB with the individual model soil components. It was proposed that sorption of TCB to the bulk soil was dominated by hydrophobic partition to the condensed, non-extractable fraction of organic matters (humin/kerogen and black carbon), while interactions with soil clay minerals were an important additional factor for sorption of TNB.

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Citations

May 20, 2014·Journal of Hazardous Materials·Jae-Woong Jung, Kyoungphile Nam
Sep 8, 2010·Environmental Toxicology and Chemistry·Huiyu SunDongqiang Zhu
Jul 24, 2015·Chemosphere·Jiří SmilekMartina Klučáková
Mar 15, 2015·Journal of Environmental Sciences (China)·Ruiming ZhangChuanyong Jing
Aug 8, 2019·Environmental Science and Pollution Research International·Jyoti TiwariAmit Bafana
Feb 18, 2020·Journal of Environmental Management·Reza Mahinroosta, Lalantha Senevirathna

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