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

In this work, a three-dimensional cobalt-MOF ([Co 3 (cis-chhc)(H 2 O) 6 ] n , Co-H 6 chhc) (cis-H 6 chhc = 1,2,3,4,5,6-cyclohexane-hexacarboxylic acid) was hydrothermally synthesized to activate peroxymonosulfate (PMS). Co-H 6 chhc 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. • The Co-H 6 chhc showed good SR-AOPs catalysis performance toward ATZ degradation. • The influence of Cl⁻ ion with different concentration for ATZ removal were explored. • The yield of HOCl played a key role on ATZ removal in Co-H 6 chhc/PMS/Cl⁻ system. • A fixed-bed device was setup to remove ATZ for long-term operation. [ABSTRACT FROM AUTHOR]