Hydrodynamic chronoamperometric method for the determination of H₂O₂ using MnO₂-based carbon paste electrodes in groundwater treated by Fenton and Fenton-like reagents for natural organic matter removal.
Hydrodynamic chronoamperometric method for the determination of H₂O₂ using MnO₂-based carbon paste electrodes in groundwater treated by Fenton and Fenton-like reagents for natural organic matter removal.
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DOI：
10.1016/j.jhazmat.2014.08.068
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发表时间：
2015-02
影响因子：
13.6
通讯作者：
Jasmina Zbiljić;O. Vajdle;Valéria Guzsvány;Jelena Molnar;J. Agbaba;B. Dalmacija;K. Kalcher
中科院分区：
文献类型：
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作者：
Jasmina Zbiljić;O. Vajdle;Valéria Guzsvány;Jelena Molnar;J. Agbaba;B. Dalmacija;K. Kalcher
研究了一种简单的基于未修饰碳糊电极（CPE）和用不同含量的MnO 2本体修饰的CPE的流体动力学计时电流法测定H2 O2。应用优化后的CPE法测定了巴纳特中部地区地下水样品中H2 O2的消耗量（塞尔维亚伏伊伏丁那省）由芬顿处理（Fe 2+和H2 O2）和类Fenton（Fe 3+和H2 O2）试剂在不同初始浓度的铁物种下去除天然有机物，以及它们与H2 O2初始浓度的比率。在最佳条件下，以磷酸盐缓冲溶液（pH 7.5）为支持电解质，饱和甘汞电极的工作电位为0.40 Vvs.，H2 O2在1.4 ~ 65 μg mL− 1的浓度范围内定量，相对标准偏差小于10%。H2 O2消耗量的结果与有机物去除效率相关的平行测量结果一致。
A simple hydrodynamic chronoamperometric method based on the application of an unmodified carbon paste electrode (CPE) and bulk-modified with different contents of MnO2was investigated for the determination of H2O2. The optimized method involving the CPE with 5% of MnO2was applied for the determination of the H2O2consumption in samples of groundwater from the Central Banat region (Province of Vojvodina, Serbia) treated by the Fenton (Fe2+and H2O2) and Fenton-like (Fe3+and H2O2) reagents to remove natural organic matter at different initial concentrations of iron species, and of their ratios to the initial concentration of H2O2. Under optimized conditions, with a working potential of 0.40 Vvs.the saturated calomel electrode and a phosphate buffer solution (pH 7.5) as supporting electrolyte, the method enabled the quantitation of H2O2in the concentration interval from 1.4 to 65 μg mL−1with a relative standard deviation of less than 10%. The results obtained for the H2O2consumption are in good agreement with those obtained by parallel measurements related to the efficiency of organic matter removal.