Peroxymonosulfate activation for effective atrazine degradation over a 3D cobalt-MOF: Performance and mechanism

Abstract

In this work, a three-dimensional cobalt-MOF ([Co3(cis-chhc)(H2O)6]n, Co-H6chhc) (cis-H6chhc = 1,2,3,4,5,6-cyclohexane-hexacarboxylic acid) was hydrothermally synthesized to activate peroxymonosulfate (PMS). Co-H6chhc showed excellent sulfate radical-advanced oxidation processes (SR-AOPs) activation performance toward ATZ removal, in which 100% ATZ was degraded within 30 min due to the recycle of Co2+/Co3+. The effects of pH, PMS dosage, catalyst dosage, co-existing anions and natural organic matters (NOMs) for ATZ degradation were explored detailly. The reusability, stability and universality experiments were proceeded under optimal condition. It is worth noting that the long-term continuous ATZ degradation was accomplished via a self-developed device.