One-step hydrothermal synthesis of Zn/Co MOF for efficiently activating PMS to degrade organic pollutants in water: The reaction kinetics and mechanism

Acetamiprid (ACE) can accumulate in the environment through the food chain, potentially endanger human health. In this experiment, zinc‑cobalt bimetallic metal organic framework (Zn/Co MOF) was synthesized and used to activate peroxymonosulfate (PMS) for the removal of ACE from water. The degradation efficiency of ACE could achieve approximately 96.93% after 90 min. Through the synergistic effect of Zn and Co bimetallic sites, ACE was degraded via a Fenton-like reaction, while reactive oxygen species (SO 4 ·- , ·OH, O 2 ·- , and 1 O 2 ) participated in the process. The high catalytic activity of Zn/Co MOF led to the degradation of ACE through the formation of a series of low-toxicity intermediates, and partial mineralization to CO 2 and H 2 O. In addition, Zn/Co MOF remained effective under broad pH conditions (pH 5–11) and temperatures (5–45 °C). This system had excellent degradation effects in actual water, with degradation rates of 95.42% and 95.18% after 90 min in the Pai River and Liren Lake, respectively. With its high catalytic performance, the Zn/Co MOF is expected to become an ideal catalyst that could be used to remove pesticide residues in water.