三氯生在碳纳米管上的吸附

Adsorption of triclosan on carbon nanotubes

药品和个人护理用品（PPCPs）已成为一个引起广泛关注的新的环境问题。采用碳纳米管（CNTs）对水溶液中的三氯生进行吸附处理，考察了碳纳米管粒径及用量、温度、pH、振荡时间等因素对三氯生去除率的影响。研究结果表明，碳纳米管能快速吸附水中的三氯生，粒径较小的碳纳米管可获得较高的三氯生去除率；低温有利于吸附反应的进行；pH在6．5—7．0时，三氯生的去除率可达97％。三氯生在碳纳米管上的吸附可以很好地用Langmuir和Freundlich吸附等温方程进行描述。

Pharmaceutical and personal care products （PPCPs） have gained widespread public attention as a new environmental problem. Carbon nanotubes were used to adsorb triclosan from aqueous solution. The influences of diameter and dosage of carbon nanotubes, temperature, pH value and oscillation time on triclosan removal rate were evaluated in this paper. Experimental results indicated that the adsorb velocity of triclosan on carbon nanotubes is very fast, and the removal rate is increased with the decrease of carbon nanotubes diameter. Low temperature is helpful for adsorption process. The removal rate of triclosan can reach 97% when the pH value is in the range of 6.5 to 7. The adsorption process can be well described by the Langmuir and Freundlich equilibrium models.