Equilibrium sorption of phenanthrene by soil humic acids

Chemosphere
Chongshan LiangCongqiang Liu

Abstract

This study investigated the effect of chemical heterogeneity of humic acids (HAs) on the equilibrium sorption of phenanthrene by HA extracts. Six HA samples were extracted from three different soils with 0.5 M NaOH and 0.1 M Na4P2O7 and were characterized with elemental analysis, infrared spectrometry, and solid-state 13C nuclear magnetic resonance (NMR) spectrometry. The equilibrium sorption measurements were carried out with a batch technique and using the six HA solids as the sorbents and phenanthrene as the sorbate. The measured sorption isotherm data were fitted to the Freundlich equation. The results showed that, for the same soil, (i) the total HA mass extracted with Na4P2O7 was 13.7-22.6% less than that extracted with NaOH, (ii) the Na4P2O7-extracted HA had higher O/C atomic ratio, greater content of polar organic carbons (POC), and lower aliphatic carbon content than the NaOH-extracted HA, and (iii) the Na4P2O7-extracted HA exhibited greater sorption isotherm linearity and but not dramatic difference in sorption capacities than the NaOH extracted HA. The differences in the HA properties resulting from the two different extraction methods may be because NaOH can hydrolyze insoluble HA fractions such as fatty acid like m...Continue Reading

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Citations

May 29, 2009·Environmental Monitoring and Assessment·Jinghuan ZhangYehong Shi
Oct 26, 2011·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Juhee KimYong Sik Ok
Jul 6, 2014·Chemosphere·Yanjie LiQian Zhang
Jan 29, 2010·Journal of Hazardous Materials·S W Chang ChienMadhava Rao Mannepalli
Jun 30, 2009·Journal of Colloid and Interface Science·Jinghuan Zhang, Mengchang He
May 13, 2008·Chemosphere·Lei LuoYibing Ma
Jul 11, 2008·Environmental Toxicology and Chemistry·Huiyu SunJingdong Mao
Jul 4, 2012·Journal of Environmental Quality·Kurt A SpokasKristine A Nichols
Mar 14, 2018·Environmental Science and Pollution Research International·Shixiang DaiWenjie Ren
Feb 5, 2011·Water Environment Research : a Research Publication of the Water Environment Federation·Jinghuan Zhang, Mengchang He
May 26, 2017·Environmental Science and Pollution Research International·Mónica J Martínez-MejíaSusanne Rath
Apr 17, 2009·Environmental Science & Technology·Benny Chefetz, Baoshan Xing
Jun 2, 2007·Environmental Science & Technology·Bei WenBaoshan Xing

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