A. Kappler

Nitrate leaching and its implication for Fe and As mobility in a Southeast Asian aquifer

This study investigates how nitrate input affects iron and arsenic mobility in aquifers by examining microbial processes in microcosm experiments.

Carbon oxidation with sacrificial anodes to inhibit O2 evolution in membrane-less bioelectrochemical systems for microbial electrosynthesis

This paper demonstrates a membrane-less bioelectrochemical system using sacrificial carbon anodes to inhibit O2 evolution, enabling efficient microbial electrosynthesis with high methane production rates.

Resolving the fate of trace metals during microbial remineralization of phytoplankton biomass in precursor banded iron formation sediments

This study tests whether iron-reducing bacteria release trace metals from phytoplankton biomass, finding no evidence of metalloprotein degradation and suggesting other microbes may have played a larger role in metal liberation during BIF formation.

Metagenomic- and cultivation-based exploration of anaerobic chloroform biotransformation in hypersaline sediments as natural source of chloromethanes

The paper investigates chloroform biotransformation in hypersaline sediments using cultivation and metagenomic approaches, finding that Clostridiales likely mediate CF to DCM and CO2 conversion.

Pyrite formation from FeS and H2S is mediated by a novel type of microbial energy metabolism

This paper demonstrates that microbial communities can directly transform FeS and H2S into pyrite and CH4, using this reaction as a novel energy metabolism linked to methanogenesis.