Citation: Xue Ming Chen, Djalma Ribeiro da Silva, Carlos A. Martínez-Huitle. Application of advanced oxidation processes for removing salicylic acid from synthetic wastewaters[J]. Chinese Chemical Letters, ;2010, 21(1): 101-104. doi: 10.1016/j.cclet.2009.08.001 shu

Application of advanced oxidation processes for removing salicylic acid from synthetic wastewaters

a Environmental Engineering Department, Zhejiang University, Hangzhou 310027, China;
b Universidade Federal do Rio Grande do Norte, CCET-Departamento de Química, Lagoa Nova-CEP 59. 072-970, Brazil;
c University of Milan, Department of Chemistry, Celoria 2, 20133 Milan, Italy

Received Date: 17 February 2009

In this study, advanced oxidation processes (AOPs) such as anodic oxidation (AO), UV/H₂O₂ and Fenton processes (FP) were investigated for the degradation of salicylic acid (SA) in lab-scale experiments. Boron-doped diamond (BDD) film electrodes using Ta as substrates were employed for AO of SA. In the case of FP and UV/H₂O₂, most favorable experimental conditions were determined for each process and these were used for comparing with AO process. The study showed that the FP was the most effective process under acidic conditions, leading to the highest rate of SA degradation in a very short time interval. However, the results showed that Ta/BDD films had high electrocatalytic activity for complete degradation of S A; even if it employs more time for complete elimination of the S A respect to FP. Additionally, AO led to a sixfold acceleration of the oxidation rate compared with the UV/H₂O₂ process. Finally a rough comparison of the specific energy consumption shows that AO process reduced the energy consumption by at least 90% compared with the UV/H₂O₂ process.
- Advanced oxidation processes,
- Salicylic acid(SA),
- Anodic oxidation,
- Ta/BDD,
- Electrocatalytic activity
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