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J4 ›› 2009, Vol. 44 ›› Issue (5): 33-39.

• 论文 • 上一篇    下一篇

新型深海中温菌Wangia profunda(SMA87)胞外多糖对对硝基苯胺的吸附研究

王敬1,2,周维芝1,3* ,申博玲1,侯万国2,张玉忠3   

  1. 1. 山东大学环境科学与工程学院, 山东 济南 250100; 2. 山东大学环境研究院, 山东 济南 250100;
    3. 山东大学微生物技术国家重点实验室, 山东 济南 250100
  • 收稿日期:2009-01-04 出版日期:2009-05-16 发布日期:2009-11-18
  • 通讯作者: 周维芝(1970),女,副教授,主要研究方向为水处理技术与资源化研究. Email: wzzhou@sdu.edu.cn
  • 作者简介:王敬(1983),女,硕士研究生,主要研究方向为水处理技术. Email: wangjingld@126.com
  • 基金资助:

    国家高技术研究发展计划(863计划)资助项目(2006AA06Z326);国家自然科学基金资助项目(50878120);

    山东省中青年科学家奖励基金资助项目(007BS08004);山东省自然科学基金资助项目(Z2008B09)

Pnitroaniline biosorption by a novel exopolysaccharide from the deepsea mesophilic bacterium Wangia profunda (SMA87)

WANG Jing 1,2 , ZHOU Weizhi 1,3* , SHEN Boling 1 , HOU Wanguo 2 , ZHANG Yuzhong 3   

  1. 1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China;
    2. Environment Research Institute, Shandong University, Jinan 250100, Shandong, China;
    3. State Key Lab of Microbial Technology, Shandong University, Jinan 250100, Shandong, China
  • Received:2009-01-04 Online:2009-05-16 Published:2009-11-18

摘要:

采用深海中温菌Wangia profunda (SMA87)的胞外多糖对对硝基苯胺进行吸附试验。分别用热分析仪、FTIR和Zeta电位仪对胞外多糖进行表征分析,并研究了吸附时间、胞外多糖用量、pH和温度等方面对其吸附规律的影响。结果表明:胞外多糖可有效去除水中的对硝基苯胺。20?℃时,01?g/L的SMA87胞外多糖吸附处理50?mL初始浓度为15?mg/L的对硝基苯胺水样120?min后,对硝基苯胺的最大吸附率可达91%;Langmuir、Freundlich、RedlichPeterson等温方程和准二级动力学方程均能较好地描述SMA87胞外多糖吸附对硝基苯胺的热力学及动力学过程,由Langmuir方程得到SMA87胞外多糖对对硝基苯胺的最大吸附量为7692?mg/g(30?℃)。

关键词: 深海中温菌SMA87;胞外多糖;对硝基苯胺;生物吸附

Abstract:

Biosorption of pnitroaniline by exopolysaccharide (EPS) from the deepsea mesophilic bacterium Wangia profunda (SMA87) was studied. The SMA87 EPS were respectively characterized by DSC/TGA, FTIR and Zeta potential. The influence of contact time,SMA87 EPS dosage, pH and temperature were investigated by batch adsorption experiments. The results showed that SMA87 EPS was particularly effective at removal pnitroaniline from aqueous solution. The adsorption ratio of pnitroaniline could reach 91%, under the condition of 20?℃, pnitroaniline concentration of 15?mg/L, EPS dosage of 01?g/L and equilibrium time at 120?min. The equilibrium data at different temperatures fitted all the Langmuir, Freundlich and RedlichPeterson models well. The maximum adsorption capacity of pnitroaniline was calculated to be 7692?mg/g (30?℃) according to the Langmuir model. Compared with the pseudofirstorder kinetic model, the biosorption kinetics for pnitroaniline can be well described by the pseudosecondorder kinetic model.

Key words:  Wangia profunda SMA87; exopolysaccharide; pnitroaniline;biosorption

中图分类号: 

  • X7031
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