Fig. 2: The redox cycles of iron minerals driven by CH4/CO2-metabolizing consortia.
From: Electrochemically coupled CH4 and CO2 consumption driven by microbial processes
a Observed changes in Fe(II)/Fe(total) over time in iron minerals. The redox cycle of iron minerals was switched by light/dark conditions. The blue line means the participation of CH4-oxidizing consortia (CH4-ox consortia), and the red line means the participation of CO2-reducing consortia (CO2-red consortia). The abiotic control represents the incubation without cells, and the biotic control represents the incubation without CH4 and CO2. Feintial, Fered, and Feox represent the initial ferrihydrite, reduced iron minerals, and oxidized iron minerals. Data generated from n = 3 biologically independent samples for each group and error bars indicate standard deviation of the mean. b Magnetic hysteresis curves of three samples from Feinitial, Fered, and Feox. c X-ray diffraction of three samples from Feinitial, Fered, and Feox. d Selected area electron diffraction and lattice images of samples collected at Fered. The images of Feintial and Feox were listed in the supporting information. e Observed changes of Fe(II)/Fe(total) driven by CH4-oxidizing consortia (blue line, CH4-ox consortia), under dark, and by CO2-reducing consortia (red line, CO2-red consortia), under light. The abiotic control represents the incubation without cells, and the biotic control represents the incubation without CH4 and CO2. Data generated from n = 3 biologically independent samples for each group and error bars indicate standard deviation of the mean.
