Characterization of sulfate reducing bacteria isolated from urban soil

International Symposium on Resource Exploration and Environmental Science

地球科学;生态环境科学

Zhang, Mingliang^1 ; Wang, Haixia^1

School of Resources and Environment, University of Jinan, Jinan, China^1

关键词: Acid mine drainage;    Acidic conditions;    Gram-negative bacteria;    Heavy metals pollution;    Metals concentrations;    Physiological characteristics;    Sulfate reducing bacteria;    Sulfate reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/64/1/012113/pdf
DOI  :  10.1088/1755-1315/64/1/012113

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Sulfate reducing bacteria (SRB) was isolated from urban soil and applied for the remediation of heavy metals pollution from acid mine drainage. The morphology and physiological characteristics (e.g. pH and heavy metals tolerance) of SRB was investigated. The SRB was gram-negative bacteria, long rod with slight curve, cell size 0.5× (1.5-2.0) μm. The pH of medium had significant effect on SRB growth and the efficiency of sulfate reduction, and it showed that the suitable pH range was 5-9 and SRB could not survive at pH less than 4. The maximum tolerance of Fe (II), Zn (II), Cd (II), and Cu (II) under acidic condition (pH 5.0) was about 600 mg/L, 150 mg/L, 25 mg/L and 25 mg/L, respectively. The result indicated that SRB isolated in this study could be used for the bioremediation of acid mine drainage (pH>4) within the heavy metals concentrations tolerance.