The binding characters study of lead removal by Lactobacillus plantarum CCFM8661

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• 作者：Ruijie Yin ; Qixiao Zhai ; Leilei Yu ; Yue Xiao…
• 关键词：Lactobacillus plantarum ; Pb2+ binding ability ; Biosorption isotherm model ; Kinetic model ; Desorption study ; Binary metals absorption
• 刊名：European Food Research and Technology
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：242
• 期：10
• 页码：1621-1629
• 全文大小：633 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Food Science
  Analytical Chemistry
  Biotechnology
  Agriculture
  Forestry
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1438-2385
• 卷排序：242

文摘

The dietary intake of lead (Pb) via contaminated food and drinking water possesses a serious risk to human health. In this study, the Pb2+ binding ability of 25 lactic acid bacteria strains was investigated, and the strain with the highest binding property, Lactobacillus plantarum CCFM8661 (36.66 ± 1.01 %), was selected for further study. The results of electron microscope revealed that most of Pb2+ was bound on the surface of bacterial cells and small amount of Pb2+ was observed in the cells. The comparison of the binding ability of different cellular components also demonstrated that the cell walls (73.79 ± 0.31 %) play a significant role in the Pb2+ binding. Through the study of the binary metals systems, the results showed that L. plantarum CCFM8661 still preferred to bind Pb2+ at the presence of other cations such as Fe2+ and Zn2+. The binding process was well explained by the Langmuir isotherm model (R2 = 0.97), the Langmuir–Freundlich dual isotherm model (R2 = 0.99), and the pseudo-second-order kinetic model (R2 = 0.99).