Sorption and Photocatalytic Degradation of Trichlorfon by Foam Concrete Blended with Nitrogen-Doped Titanium Dioxide
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 5
Abstract
Foam concrete incorporated with nitrogen-doped () was fabricated, characterized, and tested for the sorption and degradation of trichlorfon. The removal performance of trichlorfon under visible-light irradiation by using this concrete was compared with that using pure foam concrete (FC) and foam concrete incorporated with (). Factors including the amount of photocatalysts and curing age were investigated. The exhibited a higher removal efficiency of trichlorfon but a lower sorption than FC and . The sorption and photocatalytic activity decreased with curing age and the amount of incorporated nanoparticles. Seventy-five percent of trichlorfon was absorbed by (6% incorporation and 1-day curing) in 540 min, and 19% of the sorbed trichlorfon was degraded in 180 min with a compressive strength of 4.9 MPa. The FC could absorb nearly 83% of trichlorfon in 540 min but degrade less than 1% in 180 min. Moreover, 6% exhibited the best performance (removed almost 100% of trichlorfon in 2 weeks) in pilot-scale experiments, indicating its potential use in nonpoint pollution control.
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Acknowledgments
The study was financially supported by the National Natural Science Foundation of China (No. 51322901) and the Fundamental Research Funds for the Central Universities (No. 2014B02914). The research fund was provided by the National Basic Research Program of China (973 Program, No. 2010CB429006).
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Published In
Journal of Materials in Civil Engineering
Volume 28 • Issue 5 • May 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Sep 2, 2014
Accepted: Oct 14, 2015
Published online: Dec 22, 2015
Published in print: May 1, 2016
Discussion open until: May 22, 2016
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