摘要
以环氧氯丙烷为交联剂,设计合成了3种吸附剂——聚羟丙基-β-环糊精(PHP-β-CD)、聚羧甲基-β-环糊精(PCM-β-CD)两个聚β-环糊精衍生物和不带取代基的聚β-环糊精(P-β-CD)。用X射线衍射技术对PHP-β-CD和PCM-β-CD的结构表征结果显示,它们均为无定形聚集态。考察了吸附条件对3种吸附剂吸附碱性品红吸附量的影响。实验结果表明,PCM-β-CD吸附碱性品红的吸附量最大,P-β-CD吸附碱性品红的吸附量最小;体系pH对PCM-β-CD吸附碱性品红吸附量的影响最大。在室温、碱性品红初始质量浓度250 mg/L、体系pH=5.24、振荡时间2.5 h的条件下,P-β-CD和PHP-β-CD吸附碱性品红的吸附量分别为32.3,39.0 mg/g;其他条件不变,体系pH=5.43时,PCM-β-CD吸附碱性品红的吸附量为54.6 mg/g。3种吸附剂对碱性品红的吸附满足Freundlich等温方程。
Poly-β-cyclodextrin (P-β-CD) and its two derivatives, namely poly-hydroxypropyl-β- cyclodextrin( PHP-β-CD ) and poly-carboxymethyl-β-cyclodextrin ( PCM-β-CD ) were synthesized by using epoxy chloropropane as crosslinking agent. All three were used as adsorbents of fuchsin. The aggregation states of PHP-β-CD and PCM-β-CD, characterized by means of XRD, were both amorphous. The effects of adsorption conditions on adsorbance of the three adsorbents for fuchsin were investigated. PCM-β-CD showed the highest adsorbance for fuchsin while P-β-CD the lowest. The adsorbance of PCM-β-CD for fuchsin among the three was affected most by pH of the system. Under the conditions of ambient temperature, initial mass concentration of fuchsin 250 mg/L, system pH 5.24 and shaking time 2.5 h, the adsorbance of P-β-CD, PHP-β-CD for fuchsin are 32.3, 39.0 mg/g respectively; and that of PCM-β-CD is 54.6 mg/g while keeping the other conditions same as above but only system pH 5.43. The adsorbances of three adsorbents for fuchsin all fit Freundlich isotherm equation.
出处
《石油化工》
CAS
CSCD
北大核心
2009年第10期1127-1131,共5页
Petrochemical Technology
关键词
聚β-环糊精衍生物
碱性品红
吸附
染料废水
poly-β-cyclodextrin derivative
fuchsin
adsorption
dyeing waste water