Jump to main content
Jump to site search

Issue 3, 2019
Previous Article Next Article

Role of Al-based coagulants on a hybrid ozonation–coagulation (HOC) process for WWTP effluent organic matter and ibuprofen removal

Author affiliations

Abstract

The removal performance of a hybrid ozonation–coagulation (HOC) process using AlCl3·6H2O for wastewater treatment plant (WWTP) effluent organics and ibuprofen (IBP) removal is investigated. The HOC process exhibited a higher removal efficiency than coagulation and conventional pre-ozonation coagulation processes. Electron paramagnetic resonance (EPR) analysis in both ultrapure water and WWTP effluent indicated that more hydroxyl radicals (˙OH) were generated in the HOC process than in the ozonation process. The ˙OH yields, both with and without a promotion step of chain reactions, were compared for ultrapure water and WWTP effluent using tert-butanol (tBuOH) assay and the competition method. A comparison revealed that the Al-based coagulants acted more like promoters for the generation of ˙O2 to propagate the ˙OH chain reactions rather than as initiators in the HOC process for ˙OH generation. Furthermore, initiation and promotion rate constants for the Al-based coagulants were calculated to support the results obtained from the ˙OH yield experiments. The illustration of the behavior of Al-based coagulants in the HOC process provides a theoretical foundation for the application of the HOC process in advanced water/wastewater treatment.

Graphical abstract: Role of Al-based coagulants on a hybrid ozonation–coagulation (HOC) process for WWTP effluent organic matter and ibuprofen removal

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Oct 2018, accepted on 18 Jan 2019 and first published on 19 Jan 2019


Article type: Paper
DOI: 10.1039/C8EW00756J
Citation: Environ. Sci.: Water Res. Technol., 2019,5, 599-608

  •   Request permissions

    Role of Al-based coagulants on a hybrid ozonation–coagulation (HOC) process for WWTP effluent organic matter and ibuprofen removal

    X. Jin, Y. Shi, R. Hou, W. Zhang, P. Jin and X. Wang, Environ. Sci.: Water Res. Technol., 2019, 5, 599
    DOI: 10.1039/C8EW00756J

Search articles by author

Spotlight

Advertisements