JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2018, Vol. 48 ›› Issue (4): 122-127.doi: 10.6040/j.issn.1672-3961.0.2018.091

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Role of siderophore produced by Pseudoaltermonas sp. SCSE709-6 in the removal of Cd2+

WANG Zhende, HUANG Zhaosong, JIANG Li, ZHOU Weizhi*   

  1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, Shandong, China
  • Received:2018-03-06 Online:2018-08-20 Published:2018-03-06

Abstract: In order to explore the role of siderophore in the process of removal of heavy metals, Pseudoaltermonas sp. SCSE709-6(P. sp. SCSE709-6), was selected as a representative bacterium. The effect of Cd2+ addition on siderophore production by P. sp. SCSE709-6 and the effect of siderophore addition on the removal of Cd2+ were studied, respectively. Upon O-CAS assay, P. sp. SCSE709-6 showed a vivid positive result for siderophore production. Assays based on chemical properties indicated that siderophore produced by P. sp. SCSE709-6 was carboxylate type. The siderophore yield was correlated with the biomass. Siderophore production was increased first and then decreased when the Cd2+ concentration was 0~0.4 mmol/L, notable this value reached maximum at 0.2 mmol/L. It accelerated the adaptation of P. sp. SCSE709-6 to Cd2+ while siderophore was added to the culture medium, as siderophore could be combined with Cd2+ to reduce the toxicity of cadmium, leading to high removal efficiency of Cd2+. The results provided a scientific explanation of why P. sp. SCSE709-6 is highly efficient in removal of cadmium and P. sp. SCSE709-6 could be recommended as a potential candidate for application in bioremediation of heavy metals.

Key words: siderophore, Pseudoaltermonas sp. SCSE709-6, cadmium, removal efficiency, bioremediation

CLC Number: 

  • X52
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