Activation of peroxymonosulfate by La2CuO4 perovskite for synergistic removal of Microcystis aeruginosa and microcystin-LR in harmful algal bloom impacted water

Panpan Gao, Yunyi He, Shihuan Lu, Mengfan He, Zhiqun Liu, Yang Deng, Zhiquan Liu, Ting Xu, Hangjun Zhang

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The cyanobacterial blooms induced water safety problems have attracted tremendous concerns due to the adverse influences on aqueous ecosystem and human health. This study developed a novel perovskite-type catalyst for heterogeneous peroxymonosulfate (PMS) activation as an emergency measure to remove harmful algae. The results indicated that significant removal efficiency of Microcystis aeruginosa cells (97%) and chlorophyll-a (100%) was achieved within 20 min in La2CuO4/PMS system without significant release of dissolved organic carbon and metals in water. OH, SO4•-, 1O2 and O2- generated were all responsible for algae inactivation and subsequent algal organic matters removal. Moreover, the heterogeneous catalytic mechanism was proposed that La portion in La2CuO4 favored the cells destabilization by increasing zeta potential of algae suspension, while variable Cu portion facilitated the electron transfer to improve the yields of OH and SO4•-. This study demonstrates that the new catalytic PMS process promises viable and effective control of harmful algal bloom impacts in water treatment.

Original languageEnglish
Article number122511
JournalApplied Catalysis B: Environmental
Volume328
DOIs
StatePublished - 5 Jul 2023

Keywords

  • Algal organic matters
  • LaCuO perovskite
  • Microcystin-LR
  • Microcystis aeruginosa
  • Peroxymonosulfate

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