Optimization of photocatalytic degradation of Cefradine using a "green" goethite/H2O2 system
Optimization of photocatalytic degradation of Cefradine using a "green" goethite/H2O2 system
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使用“绿色”针铁矿/H2O2 系统优化头孢拉定的光催化降解
DOI：
10.1016/j.jiec.2019.06.035
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发表时间：
2019
影响因子：
6.1
通讯作者：
Huang Yingping
中科院分区：
文献类型：
--
作者：
Li Ruiping;Hong Shaoming;Li Xiaocong;Zhang Bin;Tian Hailin;Huang Yingping
在H2 O2存在下，采用环境友好型光催化剂针铁矿去除水溶液中的头孢拉定。采用Box-Behnken设计对4个因素进行了试验，并对试验结果进行了响应面分析。H2 O2浓度对头孢拉定去除率的影响最大，最佳反应条件为：H2 O2浓度4 mmol/L，溶液pH 5，针铁矿投加量1.2 g/L，光照时间9 h。实验数据头孢拉定去除在最佳条件下密切符合模型预测，验证了模型。羟自由基（·OH）和超氧阴离子参与了头孢拉定的光降解过程，其中·OH的贡献较大。
An environmental friendly photocatalyst, goethite in the presence of H2O2, was used to remove Cefradine from aqueous solution. Four factors were examined using Box–Behnken Design and results were analyzed by response surface method. H2O2concentration had the largest effect on Cefradine removal and the optimal reaction conditions were: H2O2concentration, 4 mmol/L; solution pH, 5; goethite dosage, 1.2 g/L and illumination time, 9 h. Experimental data on Cefradine removal under optimal conditions closely coincided with model predictions, validating the model. Hydroxyl radicals (•OH) and superoxide anion were involved in the Cefradine photodegradation process and that•OH makes the larger contribution.