TY - JOUR
ID -
TI - Formaldehyde degradation by UV/TiO2/O3process using
continuous flow mode
AU - QI Hong
AU - SUN De-zhi and CHI Guo-qing
VL - 19
IS - 9
PB -
SP - 1136
EP - 1140
PY -
JF - Journal of Environmental Sciences
JA - J. Environ. Sci.
UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=2007190920&flag=1
KW - UV/TiO2/O3 process; formaldehyde; continuous flow mode
AB - The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The
effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount on degradation of formaldehyde
gas were investigated. The experimental results indicated that the combination of ozonation with photocatalytic oxidation on the
degradation of formaldehyde showed a synergetic action, e.g., it could considerably increase decomposing of formaldehyde. The
degradation e ciency of formaldehyde was between 73.6% and 79.4% while the initial concentration in the range of 1.84–24 mg/m3
by O3/TiO2/UV process. The optimal humidity was about 50% in UV/TiO2/O2 processs and degradation of formaldehyde increases
from 39.0% to 94.1% when the ozone content increased from 0 to 141 mg/m2. Furthermore, the kinetics of formaldehyde degradation
reaction could be described by Langmuir-Hinshelwood model. The rate constant k of 46.72 mg/(m3·min) and Langmuir adsorption
coe cient K of 0.0268 m3/mg were obtained.
ER -