title: Characterization and Phenanthrene Sorption of Natural and Pyrogenic Organic Matter Fractions.
abstract: Pyrogenic humic acid (HA) is released into the environment during the large-scale application of biochar. However, the biogeochemistry of pyrogenic organic matter (PyOM) fractions and their sorption of hydrophobic organic compounds (HOCs) are poorly understood in comparison with natural organic matter (NOM) fractions. HA and humin (HM) fractions isolated from soils and the oxidized biochars were characterized. Sorption of phenanthrene (PHE) by these fractions was also examined. The characterization results demonstrate that pyrogenic HAs are different from natural HAs, with the former having lower atomic H/C ratios, more abundant aromatic C, and higher concentrations of surface carboxylic groups. Compared with the fresh biochars, the Kocof PHE on their oxidized biochars, pyrogenic HA, and HM fractions were undiminished, which is encouraging for the use of biochar in soil remediation. The PyOM fractions exhibited stronger nonlinear sorption than the NOM fractions. In addition, the PyOM fractions had higher sorption capacity than the NOM fractions due to their low polar C content and high aryl C content. The results obtained from this work will shed new light on the impact of the addition of biochar on the biogeochemistry of soil organic matter and on the fate of HOCs in biochar-amended soil.
authors.affiliation: School of Environment and Chemical Engineering, North China Electric Power University , Beijing 102206, China.|State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, China.|Stockbridge School of Agriculture, University of Massachusetts , Amherst, Massachusetts 01003, United States.
authors.forename: Jie
authors.initials: J
authors.lastname: Jin
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, China.
authors.forename: Ke
authors.identifier: 0000-0003-0425-7754
authors.initials: K
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, China.
authors.forename: Ziying
authors.initials: Z
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University , Beijing 100875, China.|Stockbridge School of Agriculture, University of Massachusetts , Amherst, Massachusetts 01003, United States.
authors.forename: Lanfang
authors.initials: L
authors.lastname: Han
authors.affiliation: Stockbridge School of Agriculture, University of Massachusetts , Amherst, Massachusetts 01003, United States.
authors.forename: Baoshan
authors.initials: B
authors.lastname: Xing
mesh_terms: D000327:Adsorption; D004777:Environment; D006812:Humic Substances; D009930:Organic Chemicals; D010616:Phenanthrenes / Q000737:chemistry*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry
chemical_list: D006812:Humic Substances; D009930:Organic Chemicals; D010616:Phenanthrenes; D012987:Soil; D012989:Soil Pollutants