期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 135, 期 1-3, 页码 337-343出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2005.11.071
关键词
medical wastewater; chemical oxidation; hydroxyl radical; Fenton; formaldehyde
In this study, advanced oxidation processes (AOPs) utilizing the combinations of UV/H2O2. Fenton, photo-Fenton and the combination of Fenton/photo-Fenton reactions were investigated in lab-scale experiments for the degradation of formaline wastewater. The studied toxic chemicals were formaldehyde and methanol in mixture solution, so-called formalin, which is the embalming agent in mortuaries. The experimental results showed that the photo-Fenton process was the most effective treatment process among the studied AOPs. Pseudo-first-order degradation rate constants of formaldehyde and methanol were obtained from batch experimental data. In the combination of Fenton/photo-Fenton reactions, the results show that applying UV light at an early stage of the reaction might not be necessary for a speedy oxidation reaction of the Fenton process. With Fenton and photo-Fenton processes, mineralization of formaline wastewater can be achieved. as no residual TOC is detected in the effluent after the reaction period. It is suggested that Fenton and photo-Fenton processes are viable techniques for the formaline wastewater treatment as they were able to provide high degradation of formaldehyde and methanol with relatively low toxicity of the by-products in the effluent. (c) 2005 Elsevier B.V. All rights reserved.
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