Biological Manganese Removal by Novel Halotolerant Bacteria Isolated from River Water

Biomolecules

卷:10

HoYoung Kang¹  DinhDuc Nguyen²  Myung-Gyu Ha³  VanKhanh Nguyen⁴ 

[1] Department of Microbiology, Pusan National University, Busan 46241, Korea;

[2] Institution of Research and Development, Duy Tan University, Da Nang 550000, Vietnam;

[3] Korea Basic Science Institute, Busan Center, Busan 46742, Korea;

[4] Laboratory of Advanced Materials Chemistry, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam;

关键词: bioprecipitation;    aerobic;    river;    bioremediation;    biogenic Mn oxides;   

DOI  :  10.3390/biom10060941

来源: DOAJ

【 摘 要 】

Manganese-oxidizing bacteria have been widely investigated for bioremediation of Mn-contaminated water sources and for production of biogenic Mn oxides that have extensive applications in environmental remediation. In this study, a total of 5 Mn-resistant bacteria were isolated from river water and investigated for Mn removal. Among them, Ochrobactrum sp. NDMn-6 exhibited the highest Mn removal efficiency (99.1%). The final precipitates produced by this strain were defined as a mixture of Mn₂O₃, MnO₂, and MnCO₃. Optimal Mn-removal performance by strain NDMn-6 was obtained at a temperature range of 25–30 °C and the salinity of 0.1–0.5%. More interestingly, strain NDMn-6 could be resistant to salinities of up to 5%, revealing that this strain could be possibly applied for Mn remediation of high salinity regions or industrial saline wastewaters. This study also revealed the potential of self-detoxification mechanisms, wherein river water contaminated with Mn could be cleaned by indigenous bacteria through an appropriate biostimulation scheme.

【 授权许可】

Unknown