摘要
系统研究了含铬废革屑对水体中染料、表面活性剂及芳羧酸的吸附特性。结果表明:废革屑对酸性染料(酸性嫩黄G)、直接染料(直接桃红12B)、阴离子表面活性剂(十二烷基苯磺酸钠)、邻苯二甲酸具有较强的吸附能力,吸附容量可分别达790、1032、389和1059mg/g。含铬废革屑对酸性染料、直接染料、阴离子表面活性剂的吸附平衡符合Lang- muir方程,而对邻苯二甲酸和水杨酸的吸附平衡符合Freundlich方程,这表明废革屑对上述有机物可能具有不同的吸附机理。废革屑对上述有机物的吸附动力学均符合拟二级速度方程。固定床吸附研究表明,含铬废革屑对染料和阴离子表面活性剂具有良好的固定床吸附特性,用0.1mol/L NaHCO_3可将大部分的染料和表面活性剂解吸。
The adsorption behaviors of chrome - containing leather waste to dyes, surfactants and aromatic organic acids in aqueous solutions were investigated. The results indicate that the acid dye （acid flavine G）, direct dye （direct peachblow 12B）, anionic surfactant（ sodium dodecylbenze - nesulfonate, SDBS） and o -phthalic acid can be effectively adsorbed by chrome -containing leather waste. And their adsorption capacities on chrome - containing leather waste were 790mg/g, 1 032mg/g, 389mg/g and 1 059mg/g respectively. The adsorption equilibrium of chrome - containing leather waste to the dyes, and SDBS can be described by the Langmuir equation, while the adsorption of aromatic organic acids can be described by the Freundlich equation, showing that different adsorption mechanisms might be involved. The pseudo - second - order rate model gave perfect fitting to the adsorption kinetic data of these organic compounds on the chrome - containing leather waste. Further more, satisfactory column adsorption behaviors of chrome - containing leather waste for the adsorption of dyes and anionic surfactant were observed, and the column can be regenerated by using 0.1 mol/L NaHCO3.
出处
《中国皮革》
CAS
北大核心
2007年第21期9-12,共4页
China Leather
基金
国家科技支撑计划课题(2006BAC02A09)
国家杰出青年基金(20325619)资助研究
关键词
废革屑
吸附
染料
表面活性剂
芳羧酸
chrome - containing leather waste
adsorption
dye
surfactant
aromatic organic acids
