察冬梅,刘明军,孙小梅,马璐,张威.壳聚糖磁性微球对偶氮品红的吸附[J].中南民族大学学报自然科学版,2011,(4):36-40
壳聚糖磁性微球对偶氮品红的吸附
Adsorption Behavior of Magnetic Chitosan Microspheres for Azo-Fuchsin
  
DOI:10.12130/znmdzk.201104124
中文关键词: 偶氮品红  壳聚糖  磁性微球  吸附
英文关键词: azo-fuchsin  chitosan  magnetic microspheres  adsorption
基金项目:基金项目湖北省教育厅科研基金资助项目
作者:察冬梅  刘明军  孙小梅  马璐  张威
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中文摘要:
      利用反相悬浮交联法,以Fe3O4为核,制备了壳聚糖磁性微球.将其用于水中偶氮品红的吸附,研究了溶液酸度、吸附时间、偶氮品红初始浓度、温度、离子强度对吸附的影响.结果表明:在40℃,pH 4.0,盐条件下吸附效果最佳,壳聚糖磁性微球对偶氮品红的饱和吸附量达到357.1 mg/g.运用相关数学模型拟合实验数据得出,该吸附同时符合Freundlich和Langmuir模型(均R2>0.96).经3次重复使用再生后壳聚糖磁性微球对偶氮品红的吸附率仍高于90%.该种新型吸附剂吸附能力强、速度快且易分离和可再生.
英文摘要:
      Magnetic chitosan microspheres were prepared through inverse suspension cross-linking using Fe3 04 as nucleus and the adsorption behavior of the adsorbent for azo-fuchsin was studied. Various factors affecting the adsorption behavior of magnetic chitosan microspheres for azo-fuchsin such as temperature, pH, initial concentration and ionic intensity were investigated. The results indicate that azo-fuchsin can be quickly removed from water with high efficiency. The optimal acidity for adsorption was pH 4.0. The optimal temperature was 40℃. Under these conditions, the maximum adsorption capacity of the magnetic chitosan microspheres for azo-fuchsin is 357.1 mg/g. The isotherm adsorption equilibrium isotherm conforms to Langmuir model as well as Freundlich model, with correlation coefficients greater than 0.96. In addition, it was found that when the adsorbent was used three times, its removal percentage for azo-fuchsin still reached 90 %, showing that it can be regenerated easily and used repeatedly.
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