[Sorption and desorption behaviors of tetrabromobisphenol A on fluvo-aquic soil].
Sorption and desorption behaviors of tetrabromobisphenol A (TBBPA) on fluvo-aquic soil were investigated using batch equilibrium experiments, and the effects of pH and ionic strength on the sorption were also evaluated. The results showed that the sorption process could be divided into the rapid sorption (0-24 h) and the slow sorption (24-48 h). The rapid sorption played the main role in the sorption of TBBPA and the sorption approached equilibrium at about 48 h. The nonlinear isotherm of TBBPA on the soil was observed, and the sorption behavior could be described by Freundlich model well. The amount of TBBPA sorption decreased with the increase in solution pH within the range of pH 6.0-8.0, and did not change significantly with the increase in solution pH when pH value was greater than 8.0. The amount of TBBPA sorption increased with the increase in ionic strength. In addition, the result of sorption-desorption revealed that desorption hysteresis of TBBPA, which suggested that the fluvo-aquic soil had high affinity with TBBPA.
Sun
Zhao-Hai
ZH
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China. zhsun2005@126.com
Mao
Li
L
Feng
Zheng
Z
Yu
Yi-Jun
YJ
Feng
Jian-Fang
JF
Yu
Hong-Xia
HX
D000327:Adsorption; D011075:Polybrominated Biphenyls / Q000737:chemistry*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry*
D011075:Polybrominated Biphenyls; D012987:Soil; D012989:Soil Pollutants; C020806:tetrabromobisphenol A