Abstract—This study was aimed to determine the optimal
dosages of nZnO, removal efficiency, degradation rate, kinetic
removal rates and photocatalytic effects on remediation of
TNT-contaminated water by nZnO. The varying concentrations
of nZnO were used at 1,000, 2,000 and 3,000 ppm for
remediation. The results were found that the removal efficiency
were similar at 2,000 and 3,000 ppm of nZnO concentrations
( 29.20 % and 29.43 %, respectively). The times were varied at
10, 20 and 30 minutes. The nZnO with the concentration of
2,000 ppm was added to TNT-contaminated water and the
mixture was left for required periods of time. It showed that the
removal efficiency was increased with times. However, the
highest efficiency was found only 34.35 % with the time point of
30 minutes. The photocatalytic effect on remediation of nZnO
for TNT-contaminated water was carried out by exposing the
mixture to the sunlight at one of three different times for 30
minutes. The results demonstrated that the highest removal
efficiency was found at 71.93 % in the afternoon. This study
concluded that the remediation of TNT-contaminated water by
nZnO can be enhanced by exposure to the sunlight as a
photocatalyst.
Index Terms—Nanoscale Zinc oxide, trinitrotoluene,
contaminated water, remediation, photocatalyst.
W. Kosanlavit is with Nakhon Ratchasima Rajabhat University, Nakhon Ratchasima, 30000 Thailand.
W. Saikeaw is with Ubon Ratchathani Rajabhat University, Ubon Ratchathani Rajabhat University, 34000 Thailand. R. Kosanlavit is with Institute of Science, Suranaree University of Technology. Nakhon Ratchasima, 30000 Thailand (e-mail: rk@sut.ac.th).
[PDF]
Cite: W. Kosanlavit, W. Saikeaw, and R. Kosanlavit, "The Efficiency of nZnO for Remediation of Trinitrotoluene Contaminated Water," International Journal of Chemical Engineering and Applications vol. 6, no. 2, pp. 125-129, 2015.
