磺胺甲噻二唑在光芬顿及类光芬顿体系中的矿化作用
Mineralization of sulfamethizole in photo-Fenton and photo-Fenton-like systems.
作者信息
Wu C H, Wu J T, Lin Y H
机构信息
Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, Kaohsiung 807, Taiwan E-mail:
出版信息
Water Sci Technol. 2016;73(4):746-50. doi: 10.2166/wst.2015.554.
In this investigation, UV/H2O2, UV/H2O2/Fe(2+) (photo-Fenton) and UV/H2O2/Fe(3+) (photo-Fenton-like) systems were used to mineralize sulfamethizole (SFZ). The optimal doses of H2O2 (1-20 mM) in UV/H2O2 and iron (0.1-1 mM) in photo-Fenton and photo-Fenton-like systems were determined. Direct photolysis by UV irradiation and direct oxidation by added H2O2, Fe(2+) and Fe(3+) did not mineralize SFZ. The optimal dose of H2O2 was 10 mM in UV/H2O2 and that of iron (Fe(2+) or Fe(3+)) was 0.2 mM in both UV/H2O2/Fe(2+) and UV/H2O2/Fe(3+) systems. Under the best experimental conditions and after 60 min of reaction, the SFZ mineralization percentages in UV/H2O2, UV/H2O2/Fe(2+) and UV/H2O2/Fe(3+) systems were 16, 90 and 88%, respectively. The UV/H2O2/Fe(2+) and UV/H2O2/Fe(3+) systems effectively mineralized SFZ.
在本研究中，采用紫外光/H₂O₂、紫外光/H₂O₂/Fe(Ⅱ)（光芬顿）和紫外光/H₂O₂/Fe(Ⅲ)（类光芬顿）体系对磺胺甲噻二唑（SFZ）进行矿化处理。确定了紫外光/H₂O₂体系中H₂O₂的最佳剂量（1 - 20 mM）以及光芬顿和类光芬顿体系中铁的最佳剂量（0.1 - 1 mM）。紫外光直接光解以及添加H₂O₂、Fe(Ⅱ)和Fe(Ⅲ)进行直接氧化均不能使SFZ矿化。紫外光/H₂O₂体系中H₂O₂的最佳剂量为10 mM，在紫外光/H₂O₂/Fe(Ⅱ)和紫外光/H₂O₂/Fe(Ⅲ)体系中铁（Fe(Ⅱ)或Fe(Ⅲ)）的最佳剂量均为0.2 mM。在最佳实验条件下反应60分钟后，紫外光/H₂O₂、紫外光/H₂O₂/Fe(Ⅱ)和紫外光/H₂O₂/Fe(Ⅲ)体系中SFZ的矿化率分别为16%、90%和88%。紫外光/H₂O₂/Fe(Ⅱ)和紫外光/H₂O₂/Fe(Ⅲ)体系能有效使SFZ矿化。
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