污水中溶解性有机质对土壤吸附四溴双酚A的影响  

Effects of Dissolved Organic Matter from Wastewater on Sorption of Tetrabromobisphenol A to Soils

作　　者：孙兆海[1] 毛丽[1] 冯政[1] 余益军[1] 于红霞[1] 

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,江苏南京210093

出　　处：《农业环境科学学报》2008年第6期2222-2226,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(20737001,20577020)

摘　　要：采用批量平衡实验方法,研究了城市污水处理厂进水和出水中的溶解性有机质(DOM)对四溴双酚A(TBBPA)在3种土壤中吸附行为的影响。结果表明,TBBPA在3种土壤中的分配系数为20.0～465.7L·kg-1,pH和有机质含量是影响土壤吸附TBBPA的重要因素。DOM对土壤吸附TBBPA的影响与DOM添加浓度和土壤性质有关。DOM的加入没有抑制TBBPA在潮土和草甸棕壤中的吸附,但显著抑制了TBBPA在灰色石灰土中的吸附。DOM对土壤吸附TBBPA的影响主要是TBBPA与DOM在土壤中的累积吸附效应和溶液pH等共同作用的结果。Sorption of tetrabromobisphenol A（TBBPA）on soil influences the fate and transport of TBBPA in environment, and the sorption process on soil may be complicated in the presence of dissolved organic matter（DOM）. Using batch equilibrium experiments, the effects of DOM isolated from the influent and effluent of a municipal wastewater treatment plant on the sorption of TBBPA to three soils were investigated. The results showed that the distribution coefficients of TBBPA in the three soils ranged from 20.0 to 465.7 L·kg^-1, and that the pH and organic matter content of the soils played an important role in the sorption of TBBPA. The effects of DOM on the sorption were strongly related to the concentration of the DOM and the properties of the soils. While the presence ofDOM did not inhibit the sorption of TBBPA to the fluvo-aquic soil（sandy loam ）and the meadow brown soil（loamy clay ）, it significantly suppressed the sorption of TBBPA to the grey lime soil（ silt loam ）. The impacts of the DOM on the sorption of TBBPA were mainly controlled by the cumulative sorption effect and the solution pH. The results of this work would help to understand the sorption and transport behaviors of TBBPA in soils irrigated with wastewater.

关 键 词：四溴双酚A 溶解性有机质 吸附 污水 土壤 

分 类 号：X53[环境科学与工程—环境工程] X131.3