title: Sorption isotherms of brominated diphenyl ethers on natural soils with different organic carbon fractions.
abstract: Sorption isotherms of BDE-28 and BDE-47 on natural soils with different contents of soil organic matter (SOM) were investigated. Due to low water solubility of BDEs and resulted narrow ranges of aqueous equilibrium concentration, the linear distribution model showed similar and good fitting efficiency to the linear portion of nonlinear Freundlich curve. For the same sample, the linear and nonlinear model fitting sorption coefficients were close. At the statistically significant level of 0.05 or 0.1, significant relationships of total organic carbon fraction (fOC) with the fitting sorption coefficients can be observed. As for BDE-28, the relationships of fOC and SOM fractions with the single point partition coefficients at different aqueous concentrations of BDEs were significant; while for BDE-47, the relationships became less significant or insignificant, especially at higher aqueous concentrations. The findings in this study may facilitate more understanding on transport and fate of studied BDEs in soil systems.
authors.affiliation: Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China. wxliu@urban.pku.edu.cn
authors.forename: WenXin
authors.initials: W
authors.lastname: Liu
authors.forename: WeiBo
authors.initials: W
authors.lastname: Li
authors.forename: BaoShan
authors.initials: B
authors.lastname: Xing
authors.forename: JiangLin
authors.initials: J
authors.lastname: Chen
authors.forename: Shu
authors.initials: S
authors.lastname: Tao
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D052918:Environmental Restoration and Remediation; D055768:Halogenated Diphenyl Ethers / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D011075:Polybrominated Biphenyls / Q000032:analysis / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
chemical_list: D055768:Halogenated Diphenyl Ethers; D011075:Polybrominated Biphenyls; D012987:Soil; D012989:Soil Pollutants; C511295:2,2',4,4'-tetrabromodiphenyl ether; D002244:Carbon; C533760:tribromodiphenyl ether 28