摘要
为了提高大孔吸附树脂对黄连素的吸附能力,根据黄连素结构特点,对具有苯乙烯骨架的H109树脂进行了胺基修饰.考察了胺基修饰后的特征基团、孔径和比表面积的变化,并测试了经胺基修饰后树脂对黄连素的吸附效果,确定了最佳吸附温度和初始pH.同时,对吸附过程进行吸附动力学和热力学的拟合与分析.红外扫描结果表明:胺基修饰成功,吸附过程中树脂上的胺基与黄连素分子中的醚基形成了氢键;胺基修饰后的HX树脂的孔径和比表面积有所增大,比吸附量比胺基修饰前增加7.9mg·g-1.HX树脂对黄连素的最佳吸附条件为30℃、初始pH值8.吸附过程可以采用伪二级动力学模型和Freundlich吸附等温线进行描述.
To improve the berberine adsorption capability, resin H109 with polystyrene backbone was modified by adding amino radical to form resin HX. The functional group, aperture and specific surface area of resin before and after modification was charaterized and compared. The berberine adsorption properties by resin HX , including adsorptive kinetics and thermodynamics and effect factors on adsorption, i.e. temperature and initial pH value, were investigated. Infrared spectra indicated that the hydrogen bond between ether group and amido group enhanced the adsorption capacity of berberine onto resin HX. The aperture and specific surface area increased after modification. The unit amont of adsorbent increased 7.9 mg · g-1. The optimal temperature and initial pH value for berberine adsorption were 30 ℃ and 8, repectively. The adsorption kinetic could be described by the pseudo second-order model. Besides, the adsorption isotherm could be well fitted by Freundlich model.
出处
《环境科学学报》
CAS
CSCD
北大核心
2013年第9期2452-2458,共7页
Acta Scientiae Circumstantiae
基金
国家水体污染控制与治理科技重大专项(No.2012ZX07202-002
2012ZX07202-005)
中法国际合作项目(No.2010DFB90590-03)
教育部留学回国人员科研启动基金资助项目~~
关键词
黄连素废水
胺基修饰
树脂
吸附
氢键
berberine wastewater
amino-modification
resin
adsorption
hydrogen bond
