Investigating the influences of electrode material property on degradation behavior of organic wastewaters by iron-carbon micro-electrolysis
Investigating the influences of electrode material property on degradation behavior of organic wastewaters by iron-carbon micro-electrolysis
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铁碳微电解电极材料性能对有机废水降解行为的影响研究
DOI：
10.1016/j.cej.2017.12.091
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发表时间：
2018
影响因子：
15.1
通讯作者：
Ren Zhongqi
中科院分区：
文献类型：
--
作者：
Zhu Xinyan;Chen Xinjian;Yang Zemeng;Liu Ying;Zhou Zhiyong;Ren Zhongqi
在初始pH为6、Fe/C比为1:1、Fe/C总质量为500 g·L−1、空气流量为45 L·h−1的条件下，采用Fe-C微电解工艺对落日黄（SY）废水进行了降解。研究了活性炭（AC）粒径、颗粒形状和材料种类对Fe-C微电解法降解SY及化学需氧量（COD）去除效率的影响。3 ~ mm球形煤基AC颗粒处理90 min后，500 mg·L−1SY的降解和COD去除率分别约为99.0%和77.5%。此外，SY的降解效率和COD去除率在任何其他类型的AC处理90 min后均保持在99.0%和65.0%以上。Fe-C微电解过程的稳定性较好，并通过SEM， XPS和XRD对AC使用前和使用20次后的表面进行了表征。此外，通过紫外-可见光谱分析确定了处理后的SY废水的分解降解过程。综上所述，AC的粒径、颗粒形状和材料种类确实对Fe-C微电解工艺降解SY和去除COD的效率有影响，选择3-6 mm煤基球形AC作为最佳电极材料。并以抗生素废水和印刷废水为研究对象，探讨了Fe-C微电解工艺降解其他难降解有机废水的可行性。
The degradation of Sunset Yellow (SY) wastewater was carried out using Fe-C micro-electrolysis process under the optimal conditions: initial pH 6, Fe/C ratio 1:1, Fe/C total mass 500 g·L−1and the air flow rate 45 L·h−1. Effects of particle size, particle shape and material species of activated carbon (AC) on degradation and chemical oxygen demand (COD) removal efficiencies of SY by the Fe-C micro-electrolysis process were studied. The degradation and COD removal efficiencies of 500 mg·L−1SY were approximately 99.0% and 77.5% after 90 min treatment with 3–6 mm spherical coal-based AC particles. Additionally, the degradation and COD removal efficiencies of SY maintained over 99.0% and 65.0% after 90 min treatment with any other types of AC. The stability of the Fe-C micro-electrolysis process was preferably and the AC surfaces before used and after used for 20 times were characterized by SEM, XPS, and XRD. In addition, the decomposition and degradation process was determined by UV–Vis analysis of the treated SY wastewaters. In conclusion, the particle size, particle shape and material species of AC indeed have influences on the degradation and COD removal efficiencies of SY by the Fe-C micro-electrolysis process and 3–6 mm coal-based spherical AC was selected as the optimal electrode material. Moreover, the antibiotic and printing wastewaters were selected to investigate the feasibility of degradation of other refractory organic wastewaters by Fe-C micro-electrolysis process.