TY - JOUR
T1 - 4-chlorophenol oxidation photocatalyzed by a calcined Mg-Al-Zn layered double hydroxide in a co-current downflow bubble column
AU - Martín Del Campo, Eduardo
AU - Valente, Jaime Sanchez
AU - Pavón, Thelma
AU - Romero, Rubí
AU - Mantilla, Ángeles
AU - Natividad, Reyna
PY - 2011/10/19
Y1 - 2011/10/19
N2 - The objective of this work is to study, for the first time, the photodegradation of 4-chlorophenol (4CP) catalyzed by a calcined Mg-Zn-Al layered double hydroxides (MgAlZn LDHs) in a co-current downflow bubble column (CDBC) photoreactor at pilot scale. The effect of initial organic compound concentration (C4CP0), temperature (T), and mass catalyst over reaction rate (-r4CP) was elucidated. An intrinsic kinetic regime was established, and a single-site Langmuir-Hinshelwood mechanism was determined to occur during the organic compound oxidation. The catalyst was characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectrometry (ICP-AES), and ultraviolet-visible light (UV/vis) spectrophotometry. The reaction progress was verified by UV/vis spectrophotometry and total organic carbon (TOC) content. Degradation and mineralization rate were found to be dependent on T and 4CP concentration. In the range of studied operating conditions, a maximum of 94% 4CP was degraded, while 70% total organic carbon removal was achieved.
AB - The objective of this work is to study, for the first time, the photodegradation of 4-chlorophenol (4CP) catalyzed by a calcined Mg-Zn-Al layered double hydroxides (MgAlZn LDHs) in a co-current downflow bubble column (CDBC) photoreactor at pilot scale. The effect of initial organic compound concentration (C4CP0), temperature (T), and mass catalyst over reaction rate (-r4CP) was elucidated. An intrinsic kinetic regime was established, and a single-site Langmuir-Hinshelwood mechanism was determined to occur during the organic compound oxidation. The catalyst was characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectrometry (ICP-AES), and ultraviolet-visible light (UV/vis) spectrophotometry. The reaction progress was verified by UV/vis spectrophotometry and total organic carbon (TOC) content. Degradation and mineralization rate were found to be dependent on T and 4CP concentration. In the range of studied operating conditions, a maximum of 94% 4CP was degraded, while 70% total organic carbon removal was achieved.
UR - http://www.scopus.com/inward/record.url?scp=80054012793&partnerID=8YFLogxK
U2 - 10.1021/ie200412p
DO - 10.1021/ie200412p
M3 - Artículo
SN - 0888-5885
VL - 50
SP - 11544
EP - 11552
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 20
ER -