SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (3): 330-337.DOI: 10.1016/j.cjche.2016.08.010

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Efficient decolorization of dye-containing wastewater using mycelial pellets formed of marine-derived Aspergillus niger

Tao Lu, Qilei Zhang, Shanjing Yao   

  1. Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2016-06-20 修回日期:2016-08-09 出版日期:2017-03-28 发布日期:2017-04-15
  • 通讯作者: Shanjing Yao
  • 基金资助:
    Supported by the National Natural Science Foundation of China (No. 21376214).

Efficient decolorization of dye-containing wastewater using mycelial pellets formed of marine-derived Aspergillus niger

Tao Lu, Qilei Zhang, Shanjing Yao   

  1. Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2016-06-20 Revised:2016-08-09 Online:2017-03-28 Published:2017-04-15
  • Supported by:
    Supported by the National Natural Science Foundation of China (No. 21376214).

摘要: In order to improve the efficient decolorization of dye-containing water by biosorbent and understand the biosorption mechanism, the self-immobilization mycelial pellets were prepared using a marine-derived fungus Aspergillus niger ZJUBE-1, and an azo dye, Congo red was chosen as a model dye to investigate batch decolorization efficiency by pellets. The pellets as biosorbent showed strong salt and acid tolerance in biosorption process. The results for dye adsorption showed that the biosorption process fittedwell withmodels of pseudo-second-order kinetic and Langmuir isotherm, with a maximum adsorption capacity of 263.2 mg·g-1 mycelium. During 6 batches of continuous decolorization operation, the mycelial pellets could possess efficient decolorization abilities (>98.5%). The appearance of new peak in the UV-Vis spectral result indicated that the decolorization processmay also contain biodegradation. The mechanism studies showed that efficient biosorption ability of pellets only relies on the active zone on the surface of the pellet, which can be enhanced by nutrition supplement or be shifted outward by a reculture process.

关键词: Mycelial pellets, Batch decolorization, Nutrition supplement, Re-culture, Dye wastewater treatment, Adsorption mechanism

Abstract: In order to improve the efficient decolorization of dye-containing water by biosorbent and understand the biosorption mechanism, the self-immobilization mycelial pellets were prepared using a marine-derived fungus Aspergillus niger ZJUBE-1, and an azo dye, Congo red was chosen as a model dye to investigate batch decolorization efficiency by pellets. The pellets as biosorbent showed strong salt and acid tolerance in biosorption process. The results for dye adsorption showed that the biosorption process fittedwell withmodels of pseudo-second-order kinetic and Langmuir isotherm, with a maximum adsorption capacity of 263.2 mg·g-1 mycelium. During 6 batches of continuous decolorization operation, the mycelial pellets could possess efficient decolorization abilities (>98.5%). The appearance of new peak in the UV-Vis spectral result indicated that the decolorization processmay also contain biodegradation. The mechanism studies showed that efficient biosorption ability of pellets only relies on the active zone on the surface of the pellet, which can be enhanced by nutrition supplement or be shifted outward by a reculture process.

Key words: Mycelial pellets, Batch decolorization, Nutrition supplement, Re-culture, Dye wastewater treatment, Adsorption mechanism