【摘要】：采用碳納米管(CNT)活化過二硫酸鹽(PS)降解偶氮染料酸性橙7(AO7).考察了PS濃度、CNT投加量、初始p H值、溫度等反應條件對AO7降解效果的影響.結(jié)果表明,當初始p H為7、n(PS)/n(AO7)為20、CNT投加量為0.2g/L時,AO7在反應480min后可以被完全脫色去除.隨著PS劑量、CNT投加量和溫度的升高,AO7的去除率也逐漸增加,中性條件下最有利于AO7的去除.AO7降解反應主要發(fā)生在CNT表面,且反應活化能Ea為46.76k J/mol.通過紫外-可見分光光譜、氣相色譜—質(zhì)譜(GC-MS)和TOC分析表明,AO7分子偶氮鍵和萘環(huán)結(jié)構斷裂,生成含苯環(huán)類物質(zhì),最終礦化為CO_2和H_2O.
[Abstract]:Azo dye acid orange 7 (AO7) was degraded by carbon nanotube (CNT) activated persulfate (PS). The effects of PS concentration, initial pH and temperature on the degradation of AO7 were investigated. The results show that when the initial pH is 7n (PS) / n (AO7) and the dosage of 0.2g/L is 0.2g/L, AO7 can be completely decolorized after the reaction of 480min. With the increase of dosage and temperature of PS, the removal rate of AO7 was gradually increased. The degradation of AO7 was mainly on the surface of CNT under neutral conditions, and the activation energy (EA) was 46.76kJ / mol. UV-Vis spectroscopy, gas chromatography-mass spectrometry (GC-MS) and TOC analysis showed that the azo bond and naphthalene ring structure of AO7 were broken, resulting in benzene-containing compounds, which were finally mineralized into CO_2 and H _ 2O _ 2.
【作者單位】： 蘇州科技大學環(huán)境科學與工程學院;
【基金】：國家自然科學基金項目(51478283) 蘇州科技大學學術學位研究生科研創(chuàng)新計劃項目(SKCX15_026)
【分類號】：X791

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