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Inhibition of methanogenesis by several heavy metals using pure cultures
Author(s) -
Sanchez J. M.,
Valle L.,
Rodriguez F.,
Moriñigo M. A.,
Borrego J. J.
Publication year - 1996
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.1996.tb01354.x
Subject(s) - methanogenesis , methanobacterium , zinc , methanosarcina , copper , strain (injury) , bacteria , nickel , methanogen , methanosarcina barkeri , heavy metals , chemistry , methanomicrobiales , biology , microbiology and biotechnology , environmental chemistry , archaea , genetics , organic chemistry , anatomy
The effect of different concentrations of nickel, copper and zinc on methanogenesis using pure cultures of Methanobacterium formicicum, Methanobrevibacter arboriphilicus, Methanosarcina thermophila and Methanospirillum hungatei over time (1, 15 and 30 d) was evaluated. methanobacterium formicicum showed the highest resistance to all the metals tested, while Methanospirillum hungatei was the most sensitive strain. All strains were sensitive to copper and zinc (10–250 mg 1 ‐1 , but were much more resistant to nickel (200–1200 mg 1 ‐1 ). An adaptation process of the methanogenic pure culture with the toxicants was observed over time, which indicates that the inhibitory effects of heavy metals may be reverted in optimal anaerobic conditions.