title: Insights into tetrabromobisphenol A adsorption onto soils: Effects of soil components and environmental factors.
abstract: Concerns regarding tetrabromobisphenol A (TBBPA), the most widely utilized brominated flame retardant in the world, are growing because of the wide application and endocrine-disrupting potential of this compound. To properly assess its environmental impacts, it is important to understand the mobility and fate of TBBPA in soil environments. In this study, the effects of soil components, dissolved organic carbon (DOC) and heavy metal cations on TBBPA adsorption onto two Chinese soils (red soil and black soil) were investigated using batch sorption experiments. The desorption behavior of TBBPA when the two soils are irrigated with eutrophicated river water was also investigated. The results showed that pH greatly affects the adsorptive behavior of TBBPA in soils. Iron oxide minerals and phyllosilicate minerals are both active surfaces for TBBPA sorption, in addition to soil organic matter (SOM). DOC (50 mg OC L(-1)) exhibited a limited effect on TBBPA sorption only under neutral conditions. TBBPA sorption was only minimally affected by the heavy metals (Cu2+, Pb2+ and Cd2+) in the studied pH range. Eutrophicated river water significantly enhanced the desorption of TBBPA from red soil due to the change in soil solution pH. These findings indicate that mobility of TBBPA in soils is mainly associated with soil pH, organic matter and clay fractions: it will be retained by soils or sediments with high organic matter and clay fractions under acidic conditions but becomes mobile under alkaline conditions.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Ave., Nanjing 210023, PR China. Electronic address: tongfei_nju@163.com.
authors.forename: Fei
authors.initials: F
authors.lastname: Tong
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Ave., Nanjing 210023, PR China. Electronic address: xygu@nju.edu.cn.
authors.forename: Xueyuan
authors.initials: X
authors.lastname: Gu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Ave., Nanjing 210023, PR China. Electronic address: chenggu@nju.edu.cn.
authors.forename: Cheng
authors.initials: C
authors.lastname: Gu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Ave., Nanjing 210023, PR China. Electronic address: ji@nju.edu.cn.
authors.forename: Rong
authors.initials: R
authors.lastname: Ji
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Ave., Nanjing 210023, PR China. Electronic address: tyy200889@126.com.
authors.forename: Yinyue
authors.initials: Y
authors.lastname: Tan
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 163 Xianlin Ave., Nanjing 210023, PR China. Electronic address: rainsky90@163.com.
authors.forename: Jinyu
authors.initials: J
authors.lastname: Xie
mesh_terms: D000327:Adsorption; D019216:Metals, Heavy / Q000737:chemistry; D008956:Models, Chemical; D011075:Polybrominated Biphenyls / Q000032:analysis / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*; D012995:Solubility
chemical_list: D019216:Metals, Heavy; D011075:Polybrominated Biphenyls; D012987:Soil; D012989:Soil Pollutants; C020806:tetrabromobisphenol A
keywords: Dissolved organic carbon; Metals; Soil; Sorption; Tetrabromobisphenol A; Transport