期刊
JOURNAL OF BASIC MICROBIOLOGY
卷 59, 期 12, 页码 1208-1216出版社
WILEY
DOI: 10.1002/jobm.201900100
关键词
arsenic respiration; bioremediation; carbon utilization; hydrogen gas production; metal respiration; photobioreactor; purple nonsulfur bacteria; Rhodobacter; Rhodopseudomonas palustris
类别
资金
- University of the Punjab, Lahore, Pakistan
The current research focuses on anaerobic respiration of arsenic and other toxic metals by purple nonsulfur bacteria (PNSB). Among the optimization assays performed were carbon utilization, cross metal resistance, and metal respiration, along with a comparison of each assay in photoheterotrophic and chemoheterotrophic growth. The bacteria were identified by the classification of 16S ribosomal RNA gene sequences. Rhodobacter sp. PI3 proved to be more versatile in carbon source utilization (acetate, lactate, citrate, and oxalate), whereas Rhodopseudomonas palustris PI5 proved to be more versatile in metal resistance (arsenate, arsenite, cobalt, lead, selenium, and nickel). Both the strains were found to be positive for photofermentative hydrogen production along with arsenic respiration. This study reveals that anaerobic conditions are more appropriate for better efficiency of PNSB. Our study demonstrates that R. palustris PI5 and Rhodobacter sp. PI3 can be promising candidates for the biohydrogen production along with metal detoxification using heavy metal-polluted effluents as a substrate.
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