PMID- 20093063
OWN - NLM
STAT- MEDLINE
DCOM- 20100805
LR  - 20131121
IS  - 1873-2828 (Electronic)
IS  - 1350-4177 (Linking)
VI  - 17
IP  - 5
DP  - 2010 Jun
TI  - Development of dispersed-type sonophotocatalytic process using piezoelectric 
      effect caused by ultrasonic resonance.
PG  - 884-91
LID - 10.1016/j.ultsonch.2009.12.017 [doi]
AB  - Recently, degradation of persistent organic pollutants (POPs) with low 
      biodegradability in the environment and in industrial and municipal wastewaters 
      has gained importance. In this study, a dispersed-type sonophotocatalysis (SP) 
      process, which is a combination of sonolysis and photocatalysis with dispersed 
      light sources, has been proposed for the effective and energy-efficient 
      degradation of POPs. In this method, the piezoelectric effect caused by 
      ultrasonic resonance in a piezoelectric element is used for producing 
      luminescence in a LED. A luminescent device composed of eight UV-LEDs and a 
      piezoelectric element was designed for dispersion of UV light in water; this 
      device was confirmed to show luminescence under ultrasonic irradiation. 
      Sonophotocatalytic degradation experiments were carried out using several such 
      devices, and the results were compared with those obtained in sonolysis, 
      photocatalysis, and fixed-type SP. The comparison showed that the degradation 
      rate constants in fixed-type and dispersed-type SP were larger than the sum of 
      the rate constants obtained for sonolysis and photocatalysis; further, the 
      synergetic effect caused by the combination of sonolysis and photocatalysis was 
      7.5% and 18% in fixed-type and dispersed-type SP, respectively.
CI  - (c) 2009 Elsevier B.V. All rights reserved.
FAU - Hayashi, Naohito
AU  - Hayashi N
AD  - Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku 
      University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan. 
      nhayashi@tagen.tohoku.ac.jp
FAU - Yasutomi, Ryosuke
AU  - Yasutomi R
FAU - Kasai, Eiki
AU  - Kasai E
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20091224
PL  - Netherlands
TA  - Ultrason Sonochem
JT  - Ultrasonics sonochemistry
JID - 9433356
RN  - T42P99266K (Methylene Blue)
SB  - IM
MH  - Catalysis
MH  - Methylene Blue/*chemistry/*radiation effects
MH  - *Micro-Electrical-Mechanical Systems
MH  - Radiation Dosage
MH  - Scattering, Radiation
MH  - *Sonication
EDAT- 2010/01/23 06:00
MHDA- 2010/08/06 06:00
CRDT- 2010/01/23 06:00
PHST- 2009/09/30 00:00 [received]
PHST- 2009/12/12 00:00 [revised]
PHST- 2009/12/18 00:00 [accepted]
PHST- 2010/01/23 06:00 [entrez]
PHST- 2010/01/23 06:00 [pubmed]
PHST- 2010/08/06 06:00 [medline]
AID - S1350-4177(09)00239-9 [pii]
AID - 10.1016/j.ultsonch.2009.12.017 [doi]
PST - ppublish
SO  - Ultrason Sonochem. 2010 Jun;17(5):884-91. doi: 10.1016/j.ultsonch.2009.12.017. 
      Epub 2009 Dec 24.