| Pt/生物炭电极反应器处理水中腐殖酸的研究 |
| 摘要点击 1675 全文点击 907 投稿时间：2016-02-02 修订日期：2016-03-30 |
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| 中文关键词 生物炭 电极反应器 腐殖酸 高级氧化 气浮 |
| 英文关键词 biochar electrode reactor humic acids advanced oxidization air flotation |
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| 中文摘要 |
| 构建Pt/生物炭电极反应器，研究其对水中腐殖酸的去除效率和去除特性. 结果表明，在电流密度为20 mA·cm-2下反应300 min，Pt/生物炭电极反应器对水中腐殖酸的去除率为74.58%，较Pt/石墨电极反应器47.10%去除率提高58.3%. Pt/生物炭电极反应器对水中腐殖酸的去除主要通过电化学氧化和气浮作用. 生物炭阴极比石墨阴极能产生更多的H2O2，是提高Pt/生物炭电极反应器对腐殖酸去除率的重要原因.三维荧光光谱和凝胶色谱法分析表明，Pt/生物炭电极反应器具有较强的氧化能力，可将较小分子量的腐殖酸直接矿化. 研究结果显示生物炭可以作为一种新型电化学反应器的阴极材料用于对水中有机污染物处理. |
| 英文摘要 |
| 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-2. 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 H2O2 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. |
