Synergetic Effect of Pyrrhotite and Zero-valent Iron on Hg(II) Removal in Constructed Wetland: Mechanisms of Electron Transfer and Microbial Reaction

Effective removal of mercury (Hg) contamination from wastewater is of greatsignificance due to the extremely high toxicity of Hg, especially MeHg. Reducing ofHg(II) to Hg(0) by the reducibility of iron minerals in constructed wetlands (CWs) is aneffective strategy to avoid the formation of MeHg and enhance Hg removal. While thesurface passivation of iron minerals limited its application.