Different scales of electron transfer processes in the subsurface

Yanting Zhang; Man Tong; Peng Zhang; Andreas Kappler; Songhu Yuan; Yanting Zhang; Man Tong; Peng Zhang; Andreas Kappler; Songhu Yuan

doi:10.48130/ebp-0025-0003

Figure 1.

Common electron transfer mediators in the subsurface.

Figure 2.

Different types of redox interfaces in the subsurface. Part (a) conceptualizes the redox interfaces along reduction potential gradient and those induced by oxidant disturbances in the subsurface. Part (b) presents the redox interfaces formed as a result of the structural heterogeneity of the subsurface, especially in naturally reduced zones (NRZs). The yellow electron icons represent the positions of redox interfaces.

Figure 3.

Different scales of electron transfer processes in the subsurface.

Figure 4.

Conceptualized modes for long-distance electron transfer chain. Mode 1: "hand-by-hand" mode; Mode 2: conventional mass transfer mode; Mode 3: "Relay-like" mode.