Electrochemical treatment of humic acid using particle electrodes ensembled by ordered mesoporous carbon

Environmental Science and Pollution Research International
Xue LiWenyan Liang

Abstract

In order to degrade the macromolecular pollutant of humic acid, the powder ordered mesoporous carbon (POMC, average pore diameter 4.29 nm) was first applied for preparing the granular OMC (GOMC, Φ × H = 4 × 3-6 mm) as electrodes in a continuous three-dimensional (3D) electrochemical system. The POMC was synthesized by hard-templating method and characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), particle size distribution, N2 adsorption/desorption technology, and Fourier-transform infrared (FT-IR). The effects of electrochemical degradation parameters, such as current and hydraulic retention time (HRT), were investigated, and the degradation mechanism of HA was explored as well. The results indicated that the degradation efficiency of HA, chemical oxygen demand (COD), and total organic carbon (TOC) reached 95.3, 86.2, and 62.7%, respectively, under initial HA of 100 mg/L, current of 0.2 A, and HRT of 130 min. The detection of electron paramagnetic resonance (EPR) showed that plenty of ˙OH was generated on GOMC electrodes, which made the 3D system more effective than the conventional two-dimensional (2D) system. The cyclic voltammetry curves indicated that the reactions of HA on the OM...Continue Reading

References

Apr 3, 2010·Journal of Hazardous Materials·Yanyu WuXiuya Ye
Dec 31, 2010·Environmental Toxicology and Chemistry·Fengling LiuDongqiang Zhu
Jun 24, 2014·ACS Applied Materials & Interfaces·Zakaria TabtiEmilia Morallón
Jul 4, 2015·Environmental Science and Pollution Research International·Qing XinBin Yang
Jun 18, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Wannes LibbrechtJeriffa De Clercq
Dec 16, 2017·Environmental Science & Technology·Meilan PanBingcai Pan

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