Ding Wen-Chuan, Xiang Xing-Guang, Zeng Xiao-Lan, Li Xiao-Yu, Liang Guo-Qiang, M M Mian
Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China.
Huan Jing Ke Xue. 2016 Aug 8;37(8):3073-3078. doi: 10.13277/j.hjkx.2016.08.031.
A Pt/biochar electrode reactor was developed to remove humic acid in water. The removal efficiency and characteristics of the reactor were investigated. Experimental results showed that Pt/biochar electrode reactor obtained 74.58% removal rate after 300 min reaction under current density of 20 mA·cm. The removal rate was increased by 58.3% comparing with 47.10% removal rate achieved by Pt/graphite electrode reactor. Electrochemical oxidation and air floating played the main roles in removal of humic acid from water. The improved removal efficiency of humic acid in Pt/biochar electrode reactor was attributed to the fact that the biochar cathode could produce more HO than graphite cathode. Three-dimensional excitation emission matrix fluorescence spectroscopy and Gel permeation chromatography measurement revealed that Pt/biochar electrode reactor had strong oxidation capability to mineralize the low molecular weight humic acid directly. It suggests that biochar could be use as an innovative cathode material of electrode reactor for organic pollutants treatment in water.
开发了一种Pt/生物炭电极反应器用于去除水中的腐殖酸。研究了该反应器的去除效率和特性。实验结果表明，在20 mA·cm的电流密度下反应300分钟后，Pt/生物炭电极反应器的去除率达到74.58%。与Pt/石墨电极反应器47.10%的去除率相比，去除率提高了58.3%。电化学氧化和气浮在从水中去除腐殖酸过程中起主要作用。Pt/生物炭电极反应器中腐殖酸去除效率的提高归因于生物炭阴极比石墨阴极能产生更多的·OH。三维激发发射矩阵荧光光谱和凝胶渗透色谱测量表明，Pt/生物炭电极反应器具有很强的氧化能力，可直接将低分子量腐殖酸矿化。这表明生物炭可作为电极反应器用于处理水中有机污染物的创新阴极材料。
