Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.watres.2014.03.007
Title: Response surface modeling of Carbamazepine (CBZ) removal by Graphene-P25 nanocomposites/UVA process using central composite design
Authors: Amalraj Appavoo, I.
Hu, J. 
Huang, Y.
Li, S.F.Y. 
Ong, S.L. 
Keywords: Graphene oxide
Heterogeneous photocatalysis
P25
Pharmaceutical degradation
Response surface methodology
Issue Date: 15-Jun-2014
Citation: Amalraj Appavoo, I., Hu, J., Huang, Y., Li, S.F.Y., Ong, S.L. (2014-06-15). Response surface modeling of Carbamazepine (CBZ) removal by Graphene-P25 nanocomposites/UVA process using central composite design. Water Research 57 : 270-279. ScholarBank@NUS Repository. https://doi.org/10.1016/j.watres.2014.03.007
Abstract: Graphene-P25 (Gr-P25) nanocomposites were synthesized by a simple microwave hydrothermal method. The nanocomposites with different graphene loading were evaluated for the degradation of an important pharmaceutical water pollutant, Carbamazepine (CBZ) under UVA irradiation in a batch reactor. Response surface methodology (RSM) was used to optimize three key independent operating parameters, namely Gr-P25 nanocomposites dose (X1), CBZ initial concentration (X2) and UV light intensity (X3), for photocatalytic degradation of CBZ. The central composite design (CCD) consisting of 20 experiments determined by 23 full factorial designs with six axial points and six center points was used to conduct experiments. The results showed that CBZ removal was significantly affected by the synergistic effect of linear term of Gr-P25 dose (X1) and UV intensity (X3). However, the quadratic terms of Gr-P25 (X12) and UV intensity (X32) had an antagonistic effect on CBZ removal. The obtained RSM model (R2=0.9206) showed a satisfactory correlation between experimental and predicted values of CBZ removal. The optimized conditions for achieving 100% CBZ removal with 5min UVA irradiation were 25.14mg/L, 167.68ppb and 1.35mW/cm2 for Gr-P25 dose, initial concentration of CBZ and UV intensity, respectively. © 2014 Elsevier Ltd.
Source Title: Water Research
URI: http://scholarbank.nus.edu.sg/handle/10635/91184
ISSN: 18792448
DOI: 10.1016/j.watres.2014.03.007
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

57
checked on Sep 16, 2020

WEB OF SCIENCETM
Citations

61
checked on Sep 16, 2020

Page view(s)

111
checked on Sep 13, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.