环糊精和表面活性剂对土壤中2-硝基联苯的解吸行为的影响  

Effect of cyclodextrins and surfactants on the desorption of 2-Nitrobiphenyl in soil

作　　者：邵云[1] 高士祥[2] 伏彩中[2] 王灿[2] 王连生[2] 

机构地区：[1]东南大学环境工程系,江苏南京210096 [2]南京大学环境学院,江苏南京210093

出　　处：《生态环境》2006年第1期32-36,共5页Ecology and Environmnet

基　　金：国家自然科学基金项目(20077013);教育部博士点青年基金项目(2000028423)

摘　　要：研究了3种羟丙基环糊精(HP-α-CD、HP-β-CD、HP-γ-CD)和2种非离子表面活性剂(Tween 80,Triton X-100)对土壤中2-硝基联苯的解吸行为的影响。通过比较摩尔增溶比率(MSR)的大小,确定了这5种添加剂对2-硝基联苯增溶能力由强到弱的顺序为:Tween 80,Triton X-100,HP-β-CD,HP-γ-CD,HP-α-CD。在5种添加剂中,HP-β-CD对促进土壤中2-硝基联苯的解吸最有效,且促进作用与其用量成正比。HP-α-CD对解吸过程没有明显的促进作用。Tween 80和Triton X-100由于易吸附于土壤中的特性,在低用量时对2-硝基联苯的解吸产生了负作用,只有用量足够大时才表现出明显的促进作用。The effect of three Hydroxypropyl cyclodextrins （HP-α-CD、HP-β-CD、HP-γ-CD） and two nonionic surfactants （Tween 80, Triton X-100） on the desorption of 2-nitrobiphenyl in soil was investigated. By comparing the molar solubilization ratios（MSR） of these additives, the solubization power of them was arranged from the strongest to the weakest as follows： Tween 80 〉 Triton X-100 〉 HP-β-CD〉HP-γ-CD 〉HP-α-CD. Among five additives tested, HP-β-CD was the most effective on removing the adsorbed 2-nitrobiphenyl from the soil, and the promoting effect increased proportionally with its dose. But HP-α-CD had no effect on the desorption of 2-nitrobiphenyl. Tween 80 and Triton X-100, for their characteristic to be easily adsorbed to the soil, showed negative effects on the desorption of 2-nitrobiphenyl if added at low dose. However, they would significantly enhance the desorption process if their dosages were increased properly.

关 键 词：表面活性剂 环糊精 土壤 解吸 2-硝基联苯 

分 类 号：X131.3[环境科学与工程—环境科学]