The preparation, characterization of Fe-C micro-electrolysis materials using low-cost biochar and the removal of ultra-high COD pesticide wastewater

摘要

Two kinds of FeC micro-electrolysis materials (FeC MEMs) named Fe-0/FeC MEMs and Fe3O4/FeC MEMs were prepared using low-cost biochar, chemical grade Fe-0 powder and industrial iron powder. The FeC MEMs were characterized by XRD, SEM and FT-IR. Meanwhile, the effects of sintering temperatures and mass ratios of Fe to C on the treatment high chemical oxygen demand (COD) pesticide wastewater were studied. The results display that the relative removal rate of COD reached 64% for Fe-0/FeC MEMs when the sintering temperature was 400 degrees C and the mass ratio of Fe to C was 1:1. For Fe3O4/FeC MEMs, and the mass ratio of Fe3O4 to C was 1:3, the relative removal rate of COD reached 63.71%. Hence, the chemical grade Fe-0 powder could be replaced with industrial iron powder to achieve the goal of low-cost treatment of the high COD pesticide wastewater.