Acidification-based direct electrolysis of treated wastewater for hydrogen production and water reuse.

ABSTRACT: This report describes the direct electrolysis of treated wastewater (as a catholyte) to produce hydrogen and potentially reuse the water. To suppress the negative shift of the cathodic potential due to an increase in pH by the hydrogen evolution reaction (HER), the treated wastewater is acidified using the synergetic effect of protons generated from the bipolar membrane and inorganic precipitation occurred at the surface of the cathode during the HER. Natural seawater, as an accessible source for Mg²⁺ ions, was added to the treated wastewater because the concentration of Mg²⁺ ions contained in the original wastewater was too low for acidification to occur. The mixture of treated wastewater with seawater was acidified to pH 3, allowing the initial cathode potential to

SUBMITTER: Han JH 

PROVIDER: S-EPMC10582299 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature