Sorption of polycyclic aromatic hydrocarbons on particulate organic matters |
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| Authors: | Xueyan Guo Lei Luo Yibing Ma Shuzhen Zhang |
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| Affiliation: | 1. Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, Taiwan;2. Department of Environmental Monitoring and Information Management, Environmental Protection Administration, Taipei, Taiwan;3. Department of Leisure and Recreation Management, Kainan University, Taoyuan, Taiwan;1. Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Brno 62500, Czech Republic;2. Mu Gamma Consultants Pvt. Ltd., Sector-50, Gurgaon, Haryana 122018, India;3. The Energy and Resources Institute (TERI), Darbari Seth Block, India Habitat Centre, Lodhi Road, New Delhi 110003, India;4. Norwegian Institute for Water Research (NIVA), Gaustadalleen 21, Oslo 0349, Norway;1. Instituto de Ciências do Mar, Universidade Federal do Ceará, 60165-081 Av. Abolição, 3207 Fortaleza, CE, Brazil;2. Instituto Oceanográfico, Universidade de São Paulo, 05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil;3. Departamento de Química Analítica e Físico-Química, Universidade Federal do Ceará, 60455-760 Fortaleza, CE, Brazil |
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| Abstract: | Particulate organic matter (POM) is a key organic matter fraction which can influence soil fertility. Its interactions with hydrophobic organic pollutants (HOCs) have not been characterized and the mechanisms of retention of HOCs by POM remain unclear. In the present study, sorption behaviors of polycyclic aromatic hydrocarbons (PAHs) naphthalene (NAP), phenanthrene (PHE), and pyrene (PYR) by POMs separated from different soils were examined and the POMs were characterized by elemental analysis, solid state 13C NMR, and Fourier transform infrared spectroscopy (FT-IR). The results indicated that POMs were mainly composed of aliphatic components with high polarity. The different original POMs showed similar chemical composition and configuration. Sorption behaviors of PAHs indicated that there was no significant difference in sorption capacity among the POMs. Sorption of NAP and PHE by POMs displayed a nonlinear isotherm, while sorption of PYR yielded a linear isotherm. No significant hysteresis and ionic strength effect were observed for PAH desorption from the POMs. |
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