腐殖酸对土壤吸附四溴双酚A的影响  

Effects of humic acid on sorption of tetrabromobisphenol A by 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]南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏南京210093

出　　处：《中国环境科学》2008年第8期748-752,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(20577020;20737001)

摘　　要：采用批量平衡实验方法,研究了腐殖酸(HA)对3种土壤吸附四溴双酚A(TBBPA)的影响,并且采用增溶法探讨了HA与TBBPA在溶液中的结合作用.结果表明,TBBPA的表观溶解度随HA加入浓度的增加而增加,二者在供试浓度范围内(以DOC计,0～90mg/L)有较好的线性关系,计算得到的TBBPA与HA结合系数为8807L/kg.HA的加入增加了TBBPA在土壤中的吸附,增加的程度受土壤类型和HA添加浓度的影响.分析发现,HA对土壤吸附TBBPA的影响主要与HA和TBBPA在溶液中的结合作用、在土壤中的累积吸附效应以及溶液pH值等有关.The effects of humic acid （HA） on the sorption of tetrabromobisphenol A （TBBPA） by three soils were investigated using batch equilibrium experiments, and the association of TBBPA with HA in solution was also evaluated by solubility enhancement methods. The apparent solubility of TBBPA enhanced with the increase in added HA concentration, and they exhibited good linear correlation in the range of concentration investigated （presented as DOC, 0~90mg/L）.The calculated association coefficient between TBBPA and HA was 8807L/kg. The presence of HA promoted the sorption of TBBPA by the soils, and the promotion was influenced by the characteristics of soils and the added HA concentration. It was found that the effects of HA on TBBPA sorption mainly related to the association of TBBPA with HA in solution, the cumulative sorption effect between soil solid, aqueous phases and solution pH value.

关 键 词：四溴双酚A 腐殖酸 吸附 增溶 土壤 

分 类 号：X131.3[环境科学与工程—环境科学]