中文摘要：

采用批量实验法,研究了菲在碳纳米管上的吸附以及阴/阳离子表面活性剂,十二烷基苯磺酸钠（SDBS）和十二烷基三甲基氯化铵（DDTMA）对菲吸附的影响.菲在单壁碳纳米管和多壁碳纳米管上吸附符合Freundlich等温线,n值分别为0.24和0.37,呈高度非线性;lgKF值分别为7.34和6.41,比一般土壤有机质吸附能力高出2个数量级以上,并且单壁碳纳米管对菲的吸附能力强于多壁碳纳米管.总体上,SDBS和DDTMA对菲在碳纳米管上的吸附均表现为抑制作用,抑制程度随表面活性剂浓度增加而增加,随菲浓度增加而减弱.但是当DDTMA浓度较大时（1000 mg.L-1）,对于菲在吸附能力较低的多壁碳纳米管上的吸附的抑制程度降低;特别是当菲浓度较大时,对菲的吸附反而有促进作用.这是因为DDTMA在碳纳米管表面形成的类（混合）胶束结构对菲的吸附促进作用部分抵偿（或超过）了其占据多壁碳纳米管表面的吸附抑制作用.

英文摘要：

Batch experiments were employed to investigate the sorption of phenanthrene （Phe） on carbon nanotubes （CNTs） and the influence of an anionic surfactant, sodium dodecylbenzene sulfonate （SDBS） and a cationic surfactant, dodecyltrimethylammonium chloride （DDTMA） on the sorption. All isotherms fitted well to Freundlich equation. Freundlich exponent n was 0.24 and 0.37 on single-walled CNT （SWCNT） and multi- walled CNT （ MWCNT）, respectively, indicating the high nonlinearity of the isotherm. Sorption capacity index lgK~ was 7.34 and 6.41 on SWCNT and MWCNT, which was over 2 magnitude orders higher than those on common soil organic matter. The SWCNT exhibited greater sorption capacity than MWCNT. Generally, both SDBS and DDTMA reduced Phe sorption on CNTs. The extent of Phe sorption reduction increased with surfactant concentration, and decreased with Phe concentration. However, with 1000 mg.L-1 DDTMA, the inhibition on Phe sorption on MWCNT with relatively lower sorption capacity was not as great as those in the presence of DDTMA of lower concentration. Moreover, when Phe concentration was high, sorption enhancement occurred. This is because the sorption of Phe by micelle like structure or mixed micelle formed by DDTMA on the surface of CNT partially counteracted （ or even surpassed） the sorption inhibition due to the occupying of MWCNT surface by DDTMA.