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. 2004 Sep 8;101(38):13703–13708. doi: 10.1073/pnas.0402775101

Fig. 3.

Fig. 3.

Biogeochemical model. Shown is a summary of adsorption and precipitation reactions that control arsenic uptake and release in the As-Fe-S system. Open arrows indicate adsorption reactions, filled arrows indicate dissolution/precipitation reactions, and curved arrows indicate reactions that may couple with microbial organic matter oxidation. Diagram shows the primary reactions for a system transitioning from oxidized to reducing conditions; reactions for oxidation pathways may differ.