Removal of heavy metals by an enriched consortium

• Published in: The journal of microbiology 2008, 46(1), , pp.23-28
• Main Authors: Lee, Eun Young, Lim, Joung Soo, Oh, Kyung Hwan, Lee, Jae Yeon, Kim, Seog Ku, Lee, Yoo Kyung, Kim, Keun
• Format: Article
• Language: English
• Subjects: Bacteria - classification; Bacteria - genetics; Bacteria - isolation & purification; Biodegradation, Environmental; Biomedical and Life Sciences; Burkholderiaceae - genetics; Burkholderiaceae - isolation & purification; Burkholderiaceae - metabolism; Burkholderiaceae - ultrastructure; DNA, Bacterial - genetics; DNA, Ribosomal - genetics; Geologic Sediments - microbiology; Life Sciences; Metals, Heavy - analysis; Metals, Heavy - metabolism; Microbiology; Molecular Sequence Data; Phylogeny; Ralstonia; RNA, Ribosomal, 16S - genetics; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism; 생물학
• ISSN: 1225-8873; 1976-3794
• DOI: 10.1007/s12275-007-0131-6

An enriched consortium obtained from lake-sediment was developed for the removal of heavy metals such as Cu, Pb, Cr, Ni, and Zn from heavy metal-contaminated water. The removal efficiency of heavy metals in a shaking condition was generally higher than that in the static state. After the fifteenth enrichment with assorted heavy metals, the removal efficiencies in the shaking and static condition at an average concentration of 100 mg/L of each heavy metal were approximately 99∼100% and 95∼100%, respectively, depending on the type of heavy metal. An aerobically grown, pure culture isolated from an enriched culture was analyzed by 16S rRNA sequencing and identified as Ralstonia sp. HM-1. This strain was found to remove various heavy metals with an efficiency of approximately 97∼100% at an average concentration of 200 mg/L of each heavy metal.