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A platform for research: civil engineering, architecture and urbanism
Sorption and Photocatalytic Degradation of Trichlorfon by Foam Concrete Blended with Nitrogen-Doped Titanium Dioxide
AbstractFoam concrete incorporated with nitrogen-doped TiO2 (N-TiO2/FC) 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 TiO2 (TiO2/FC). Factors including the amount of photocatalysts and curing age were investigated. The N-TiO2/FC exhibited a higher removal efficiency of trichlorfon but a lower sorption than FC and TiO2/FC. The sorption and photocatalytic activity decreased with curing age and the amount of incorporated nanoparticles. Seventy-five percent of 20 mg/L trichlorfon was absorbed by N-TiO2/FC (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% N-TiO2/FC exhibited the best performance (removed almost 100% of trichlorfon in 2 weeks) in pilot-scale experiments, indicating its potential use in nonpoint pollution control.
Sorption and Photocatalytic Degradation of Trichlorfon by Foam Concrete Blended with Nitrogen-Doped Titanium Dioxide
AbstractFoam concrete incorporated with nitrogen-doped TiO2 (N-TiO2/FC) 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 TiO2 (TiO2/FC). Factors including the amount of photocatalysts and curing age were investigated. The N-TiO2/FC exhibited a higher removal efficiency of trichlorfon but a lower sorption than FC and TiO2/FC. The sorption and photocatalytic activity decreased with curing age and the amount of incorporated nanoparticles. Seventy-five percent of 20 mg/L trichlorfon was absorbed by N-TiO2/FC (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% N-TiO2/FC exhibited the best performance (removed almost 100% of trichlorfon in 2 weeks) in pilot-scale experiments, indicating its potential use in nonpoint pollution control.
Sorption and Photocatalytic Degradation of Trichlorfon by Foam Concrete Blended with Nitrogen-Doped Titanium Dioxide
Zhang, Wenlong (author) / Wang, Qing / Xing, Tao / Gao, Qiang / Wang, Dawei / Li, Yi
2016
Article (Journal)
English
BKL:
56.45
Baustoffkunde
Local classification TIB:
535/6520/6525/xxxx
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