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Typical Application of Sound Field in Wastewater Treatment with Fluidized Bed Photocatalytic Reactor
Author(s) -
Si Chongdian,
Zhou Jing,
Gao Hongtao,
Liu Guangjun,
Wu Jianjun
Publication year - 2015
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143015x14212658613910
Subject(s) - photocatalysis , fluidized bed , fluidization , materials science , degradation (telecommunications) , chemical engineering , wastewater , catalysis , reaction rate constant , environmental engineering , chemistry , kinetics , environmental science , organic chemistry , telecommunications , computer science , engineering , physics , quantum mechanics
The effect of a sound field on wastewater treatment with a fluidized bed photocatalytic reactor (FBPR) was investigated. With Alizarin Green (AG) being the sole infectant, the Fe‐doped TiO 2 catalyst prepared was used as the fluidized media . According to the Langmuir–Hinshelwood model, the photocatalytic degradation follows the pseudo‐first‐order reaction kinetics with respect to the concentration of AG. Sound field application allowed the fluidization of the fine powder at high liquid flow rates; thus, the mass transfer rate between organic pollutant and particle photocatalyst was enhanced and the efficiency of degradation was increased. As expected, the degradation rate constant increased with increasing sound pressure level, as well as increased with increasing sound frequency ranging from 50 to 100 Hz, then further decreased with increasing sound frequency from 100 to 200 Hz. In addition, Fe doping is also responsible for the enhanced photocurrent response of the Fe‐doped TiO 2 nanoparticle in FBPR relative to pure TiO 2 .