期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 745, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.141154
关键词
Cyanobacteria; Photocatalysis; Cyanotoxins; Water treatment; Titanium dioxide; UV-LED
资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/P029280/1]
- EPSRC [EP/P029280/1] Funding Source: UKRI
Cyanobacteria and their toxic secondary metabolites are a challenge in water treatment due to increased biomass and dissolved metabolites in the raw water. Retrofitting existing water treatment infrastructure is prohibitively expensive or unfeasible, hence in-reservoir' treatment options are being explored. In the current study, a treatment system was able to photocatalytically inhibit the growth of Microcystis aeruginosa and remove released microcystins by photocatalysis using titanium dioxide coated, porous foamed glass beads and UV-LEDs (365 nm). A 35% reduction of M. aeruginosa PCC7813 cell density compared to control samples was achieved in seven days. As a function of cell removal, intracellular microcystins (microcystin-LR. -LY, -LW, and -LF) were removed by 49% from 0.69 to 035 mu g mL(-1) in seven days, Microcystins that leaked into the surrounding water from compromised cells were completely removed by photocatalysis. The findings of the current study demonstrate the feasibility of an in-reservoir treatment unit applying low cost UV-LEDs and porous foamed beads made from recycled glass coated with titanium dioxide as a means to control cyanobacteria and their toxins before they can reach the water treatment plant. (C) 2020 Elsevier B.V. All rights reserved.
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