Three oxidation processes for amoxicillin wastewater pretreatment such as Electro-Fe3 + (EDTA)/H2O2 (EDTA: ethylenediaminetetraacetic acid), Fe3 + (EDTA)/H2O2 and Electro-Fe3 + /H2O2 were simultaneously discussed at pH of 7.0 (±0.1). It was found that the above processes could achieve 78%, 64%, 33% chemical oxygen demand (CODcr) removal, and 86%, 70%, 47% amoxicillin degradation respectively. Moreover, the results of biodegradability (biological oxygen demand (BOD5)/CODcr ratio) showed that the Electro-Fe3 + (EDTA)/H2O2 process was a promising way to pretreat antibiotic wastewater due to the biodegradability of the effluent improved to 0.48 compared with the cases of Fe3 + (EDTA)/H2O2 (0.40) and Electro-Fe3 + /H2O2 process (0.12). Therefore, it was reasonable to note that EDTA and electricity showed synergetic effect on the oxidation process. Additionally, infrared spectra (IR) were applied to concisely propose a potential degradation way of amoxicillin. The characteristic changes of H2O2 and EDTA in the oxidation process were also investigated in detail.
EDTA and electricity synergetic catalyzed Fe3 + /H2O2 process for amoxicillin oxidation
Ting-Ting Shen, Xiao-Ming Li, Yu-Fang Tang, Juan Wang, Xiu Yue, Jian-Bin Cao, Wei Zheng, Dong-Bo Wang, Guang-Ming Zeng; EDTA and electricity synergetic catalyzed Fe3 + /H2O2 process for amoxicillin oxidation. Water Sci Technol 1 July 2009; 60 (3): 761–770. doi: https://doi.org/10.2166/wst.2009.356
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