摘要
利用活性炭纤维毡(ACF)对三聚氰酸进行了静态吸附和电脱附,通过透射电子显微镜(TEM)、场发射扫描电子显微镜(SEM)对ACF微观结构进行了表征,并通过高效液相色谱(HPLC)检测了三聚氰酸含量.研究了吸附平衡时间、pH等对静态吸附的影响,以及电解质浓度和脱附时间对电脱附率的影响.结果表明:ACF对三聚氰酸的吸附遵循准二级吸附动力学,符合Langmuir和Freundlich等温吸附模型,酸性环境能促进对三聚氰酸的吸附,pH=12时发生脱附再生,用ACF电脱附三聚氰酸最佳脱附时间15min时脱附率可达92.5%.
Activated Carbon Fiber（ACF） was used to absorb and electrically desorb cyanuric acid and the microstructure was characterized by transmission electron microscope （TEM） and field emission scanning electron microscope （SEM）. The content of cyanuric acid was measured by using high performance liquid chromatography （I-IPLC）. The influence of adsorption equilibrium time and pH on absorption, the electrolyte concentration and desorption time on the rate of electric desorption were investigated. The results showed that the adsorption of cyanuric acid onto ACF followed pseudo-second order kinetics, in accord with the Langmuir and Freundlich adsorption isotherm model. Lower pH could enhance the adsorption capacity and alkaline environment （pH = 12） led to desorption regeneration. Desorption rate reached 92.5% when electrically desorbed 15 minutes.
出处
《中南民族大学学报（自然科学版）》
CAS
2014年第2期14-17,共4页
Journal of South-Central University for Nationalities：Natural Science Edition
基金
国家自然科学基金资助项目(20807057)
湖北省杰出青年基金资助项目(2011CDA106)
武汉市工程中心计划资助项目(200950431227&201160638173)
关键词
活性炭纤维毡
三聚氰酸
准二级吸附动力学
电脱附
activated carbon fiber （ACF）
cyanuric acid
pseudo-second order kinetics
electric desorption
