本文關(guān)鍵詞：鈦基二氧化鉛電極對(duì)酸性紅G的電催化降解　出處：《環(huán)境工程學(xué)報(bào)》2016年11期 　論文類型：期刊論文

  更多相關(guān)文章： 二氧化鉛 酸性紅G 電催化 羥基自由基 能耗

【摘要】：采用二氧化鉛電極對(duì)酸性紅G溶液進(jìn)行電催化降解,主要研究酸性紅G的紫外-可見譜變化及其可能降解機(jī)制,考察不同因素對(duì)降解效果的影響。結(jié)果表明,酸性紅G在電極表面是以間接氧化機(jī)制被羥基自由基氧化。電解過(guò)程中,偶氮鍵斷鍵速率顯著高于苯環(huán)及萘環(huán),酸性紅G去除率顯著高于TOC去除率。電解時(shí)間延長(zhǎng)有利于有機(jī)物去除,但會(huì)提高能耗值,且單位TOC去除能耗遠(yuǎn)高于單位酸性紅G去除能耗。電流密度提高會(huì)促進(jìn)酸性紅G降解與TOC去除,卻使單位能耗顯著增加,且高電流密度會(huì)導(dǎo)致礦化電流效率下降。染料濃度增加使得酸性紅G與TOC去除效率降低,但單位能耗隨之降低,表明高有機(jī)物濃度有利于降低單位能耗值。溫度升高有利于有機(jī)物降解去除。
[Abstract]:The electrocatalytic degradation of acid red G solution was carried out by using lead dioxide electrode. The UV-Vis spectrum of acid red G and its possible degradation mechanism were studied. The effects of different factors on the degradation efficiency were investigated. Acid red G was oxidized by hydroxyl radical on the electrode surface by indirect oxidation mechanism. In the electrolysis process, the bond breaking rate of azo bond was significantly higher than that of benzene ring and naphthalene ring. The removal rate of acid red G is significantly higher than that of TOC. The prolongation of electrolysis time is beneficial to the removal of organic matter, but it will increase the energy consumption. The energy consumption per unit TOC removal is much higher than that per unit acid red G. the increase of current density will promote the degradation of acid red G and the removal of TOC, but the unit energy consumption will increase significantly. The higher the current density, the lower the mineralization current efficiency. The higher the dye concentration, the lower the removal efficiency of acid red G and TOC, but the lower the unit energy consumption. The results show that high concentration of organic matter is beneficial to decrease unit energy consumption, and temperature rise is favorable to organic matter degradation and removal.
【作者單位】： 西安交通大學(xué)環(huán)境科學(xué)與工程系;西安創(chuàng)業(yè)水務(wù)有限公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(21307098) 中國(guó)博士后科學(xué)基金資助項(xiàng)目(2013M532053)
【分類號(hào)】：X791
【正文快照】： 印染工藝是紡織行業(yè)中體現(xiàn)面料色彩、功能性和手感的關(guān)鍵環(huán)節(jié),對(duì)產(chǎn)品質(zhì)量有著舉足輕重的作用;同時(shí),印染工藝也是水耗大戶。全國(guó)印染及相關(guān)行業(yè)每年廢水排放量約為5.62×108m3[1]。隨著印染行業(yè)的快速發(fā)展,其排放量占全國(guó)工業(yè)廢水排放量的比重在不斷提高,已成為我國(guó)工業(yè)系統(tǒng)中，

本文編號(hào)：1372410