title: Sulfamethoxazole sorption by sediment fractions in comparison to pyrene and bisphenol A.
abstract: The environmental behavior of antibiotics has attracted great research attention. However, their sorption mechanisms in soils/sediments are still unknown. Comparison of the sorption properties between the widely-studied hydrophobic organic contaminants (HOCs) and antibiotics may provide valuable insight to antibiotic sorption mechanisms. Thus, in this study batch experiments for pyrene (PYR), bisphenol A (BPA), and sulfamethoxazole (SMX) sorption were conducted on a sediment sample and its separated fractions. Our results showed the high sorption of PYR on black carbon and organic matter. Although high sorption of SMX was observed for both separated organic fractions (humic acids) and inorganic mineral particles, the original sediment particles showed relatively low sorption. Competitive sorption between SMX and dissolved humic acid on mineral particles was observed in this study. This competitive interaction is a unique process for antibiotic sorption in soils/sediments compared with apolar HOCs and may be one of the important factors controlling the antibiotic sorption.
authors.affiliation: Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming 650093, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Hou
authors.forename: Bo
authors.initials: B
authors.lastname: Pan
authors.forename: Xuekui
authors.initials: X
authors.lastname: Niu
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Chen
authors.forename: Baoshan
authors.initials: B
authors.lastname: Xing
mesh_terms: D000042:Absorption; D000327:Adsorption; D000890:Anti-Infective Agents / Q000737:chemistry*; D001559:Benzhydryl Compounds; D019015:Geologic Sediments / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis; D010636:Phenols / Q000737:chemistry*; D011721:Pyrenes / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D053260:Soot / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013420:Sulfamethoxazole / Q000737:chemistry*; D000098826:Bisphenol A Compounds
chemical_list: D000890:Anti-Infective Agents; D001559:Benzhydryl Compounds; D006812:Humic Substances; D010636:Phenols; D011721:Pyrenes; D012989:Soil Pollutants; D053260:Soot; D013420:Sulfamethoxazole; C030984:pyrene; C006780:bisphenol A; D000098826:Bisphenol A Compounds