Bacterial diversity and production of sulfide in microcosms containing uncompacted bentonites.

ABSTRACT:

Aims

This study examined the diversity and sulfide-producing activity of microorganisms in microcosms containing commercial clay products (e.g., MX-80, Canaprill and National Standard) similar to materials which are currently considered for use in the design specifications for deep geologic repositories (DGR) for spent nuclear fuel.

Methods and results

In anoxic microcosms incubated for minimum of 60 days with 10 g l^-1 NaCl, sulfide production varied with temperature, electron donor and bentonite type. Maximum specific sulfide production rates of 0.189 d^-1, 0.549 d^-1 and 0.157 d^-1 occurred in lactate-fed MX-80, Canaprill and National Standard microcosms, respectively. In microcosms with 50 g l^-1 NaCl, sulfide prod

SUBMITTER: Grigoryan AA 

PROVIDER: S-EPMC6090518 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature