Shen Ting-Ting, Li Xiao-Ming, Tang Yu-Fang, Wang Juan, Yue Xiu, Cao Jian-Bin, Zheng Wei, Wang Dong-Bo, Zeng Guang-Ming
College of Environmental Science and Engineering, Hunan University, Changsha Hunan 410082, China.
Water Sci Technol. 2009;60(3):761-70. doi: 10.2166/wst.2009.356.
Three oxidation processes for amoxicillin wastewater pretreatment such as Electro-Fe(3+)(EDTA)/H2O2 (EDTA: ethylenediaminetetraacetic acid), Fe(3+)(EDTA)/H2O2 and Electro-Fe(3+)/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 (COD(cr)) removal, and 86%, 70%, 47% amoxicillin degradation respectively. Moreover, the results of biodegradability (biological oxygen demand (BOD(5))/COD(cr) ratio) showed that the Electro-Fe(3+)(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 Fe(3+)(EDTA)/H2O2 (0.40) and Electro-Fe(3+)/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.
在pH值为7.0（±0.1）的条件下，同时探讨了三种用于阿莫西林废水预处理的氧化工艺，即电-Fe(3+)(乙二胺四乙酸)/H2O2（乙二胺四乙酸：ethylenediaminetetraacetic acid）、Fe(3+)(乙二胺四乙酸)/H2O2和电-Fe(3+)/H2O2。结果发现，上述工艺分别可实现78%、64%、33%的化学需氧量（COD(cr)）去除率，以及86%、70%、47%的阿莫西林降解率。此外，生物降解性（生化需氧量（BOD(5)）/COD(cr)比值）结果表明，电-Fe(3+)(乙二胺四乙酸)/H2O2工艺是预处理抗生素废水的一种有前景的方法，因为与Fe(3+)(乙二胺四乙酸)/H2O2工艺（0.40）和电-Fe(3+)/H2O2工艺（0.12）相比，其出水的生物降解性提高到了0.48。因此，有理由认为乙二胺四乙酸和电在氧化过程中表现出协同效应。此外，还应用红外光谱（IR）简要提出了阿莫西林的一种潜在降解途径。同时，还详细研究了氧化过程中H2O2和乙二胺四乙酸的特征变化。
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