A fuel-cell-assisted iron redox process for simultaneous sulfur recovery and electricity production from synthetic sulfide wastewater

► A novel FC-IR process was reported to recover sulfur and electricity from sulfide. ► The fuel cell and iron based liquid redox sulfur recovery techniques were combined. ► The sulfide oxidation and Fe(III) regeneration were individually investigated. ► Results of coupling operation confirmed the feasibility of the FC-IR process.