期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 285, 期 -, 页码 398-408出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2014.12.024
关键词
Photocatalytic degradation; Recalcitrant organic pollutants; Cylindrical multi-column photoreactor; TiO2-coated silica gel; Water purification
资金
- Japan Society for the Promotion of Science (JSPS) [26670901, 22248025]
- Grants-in-Aid for Scientific Research [26670901, 22248025] Funding Source: KAKEN
A novel cylindrical multi-column photocatalytic reactor (CMCPR) has been developed and successfully applied for the degradation of methyl orange (MO), amoxicillin (AMX) and 3-chlorophenol (3-CP) in water. Due to its higher adsorption capacity and simpler molecular structure, 3-CP compared with MO and AMX obtained the highest photodegradation (100%) and mineralization (78.1%) after 300-min photocatalytic reaction. Electrical energy consumption for photocatalytic degradation of MO, AMX and 3-CP using CMCPR was 5.79 x 10(4), 7.31 x 10(4) and 2.52 X 10(4) kWh m(-3) order(-1), respectively, which were less than one-thousand of those by reported photoreactors. The higher flow rate (15 mL min(-1)), lower initial concentration (5 mg L-1) and acidic condition (pH 3) were more favorable for the photocatalytic degradation of MO using CMCPR. Five repetitive operations of CMCPR achieved more than 97.0% photodegradation of MO in each cycle and gave a relative standard deviation of 0.72%. In comparison with reported slurry and thin-film photoreactors, CMCPR exhibited higher photocatalytic efficiency, lower energy consumption and better repetitive operation performance for the degradation of MO, AMX and 3-CP in water. The results demonstrated the feasibility of utilizing CMCPR for the degradation of recalcitrant organic pollutants in water. (C) 2014 Elsevier B.V. All rights reserved.
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