Back to Search
Start Over
Solar-driven semi-conductor photocatalytic water treatment (TiO2, g-C3N4, and TiO2+g-C3N4) of cyanotoxins : proof-of-concept study with microcystin-LR
- Source :
- Pestana, C J, Hui, J, Camacho-Muñoz, D, Edwards, C, Robertson, P K J, Irvine, J T S & Lawton, L A 2023, ' Solar-driven semi-conductor photocatalytic water treatment (TiO 2, g-C 3 N 4, and TiO 2 +g-C 3 N 4 ) of cyanotoxins: proof-of-concept study with microcystin-LR ', Chemosphere, vol. 310, 136828 . https://doi.org/10.1016/j.chemosphere.2022.136828
- Publication Year :
- 2022
-
Abstract
- Funding: We acknowledge the funding provided by the Engineering and Physical Sciences Research Council, UK (Global Challenge Research Fund: EP/P029280/1) towards carrying out this research. We also thank the support on electron microscopes from EPSRC Capital for Great Technologies (Grant EP/LP017008/1 and EP/R02375/1). Cyanobacteria and their toxins are a threat to drinking water safety as increasingly cyanobacterial blooms (mass occurrences) occur in lakes and reservoirs all over the world. Photocatalytic removal of cyanotoxins by solar light active catalysts is a promising way to purify water at relatively low cost compared to modifying existing infrastructure. We have established a facile and low-cost method to obtain TiO2 and g-C3N4 coated floating photocatalysts using recycled glass beads. g-C3N4 coated and TiO2+g-C3N4 co-coated beads were able to completely remove microcystin-LR in artificial fresh water under both natural and simulated solar light irradiation without agitation in less than 2 h. TiO2 coated beads achieved complete removal within 8 h of irradiation. TiO2+g-C3N4 beads were more effective than g-C3N4 beads as demonstrated by the increase reaction rate with reaction constants, 0.0485 min−1 compared to 0.0264 min−1 respectively, with TiO2 alone found to be considerably slower 0.0072 min−1. g-C3N4 based photocatalysts showed a similar degradation pathway to TiO2 based photocatalysts by attacking the C6–C7 double bond on the Adda side chain. Publisher PDF
- Subjects :
- MCC
In-reservoir treatment
Environmental Engineering
Health, Toxicology and Mutagenesis
Public Health, Environmental and Occupational Health
NDAS
General Medicine
General Chemistry
QD Chemistry
Pollution
Graphitic-carbon nitride
Environmental Chemistry
Titanium dioxide
Water treatment
QD
Visible light photocatalysis
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Pestana, C J, Hui, J, Camacho-Muñoz, D, Edwards, C, Robertson, P K J, Irvine, J T S & Lawton, L A 2023, ' Solar-driven semi-conductor photocatalytic water treatment (TiO 2, g-C 3 N 4, and TiO 2 +g-C 3 N 4 ) of cyanotoxins: proof-of-concept study with microcystin-LR ', Chemosphere, vol. 310, 136828 . https://doi.org/10.1016/j.chemosphere.2022.136828
- Accession number :
- edsair.doi.dedup.....c25051c926d4b2f97fed1a6eab15f33c