| 过硫酸盐氧化处理含萘磺酸废水 |
| 摘要点击 1550 全文点击 615 投稿时间：2020-03-12 修订日期：2020-04-02 |
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| 中文关键词 H酸 过硫酸盐 碱活化 热活化 氧化 |
| 英文关键词 H acid persulfate alkali activation thermal activation oxidation |
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| 中文摘要 |
| 萘磺酸在工业上应用广泛.本文选取H酸（1-氨基-8-萘酚-3，6-二磺酸）为特征污染物，比较了碱活化、热活化以及碱热复合活化过硫酸盐（PS）降解H酸的效果并讨论了其他因素对复合活化的影响.结果表明，碱活化中氧化钙投加量从0增加至1250 mg ·L-1，反应100 min后H酸的去除率由42.5%升至82.8%.热活化中H酸的去除率与温度正相关，在65℃时H酸去除率为77.5%，反应的活化能为37.85 kJ ·mol-1.复合活化虽然加快了反应速率，但高温下PS迅速分解导致对H酸的降解效果不如单一热活化，PS浓度的改变并未显著提高H酸的去除率，无机阴离子CO32-不利于H酸的去除.复合活化对H酸的矿化效果不理想，TOC去除率仅为16%.利用GC-MS鉴定出H酸的降解中间产物主要是对-苯二甲酸，表明萘环打开后可能生成了邻-苯二甲酸酐. |
| 英文摘要 |
| Naphthalene sulfonic acid is widely used in the industry. In this study, H acid (1-amino-8-naphthol-3,6-disulfonic acid) was selected as the characteristic pollutant, and the alkali-activated, thermally-activated, and alkali-heat-complex activated persulfate (PS) degradation of H acid was analyzed. The effects of other factors on complex activation were discussed. The experimental results showed that with the addition of calcium oxide from 0 to 1250 mg ·L-1, the H acid removal rate increased from 42.5% to 82.8% after 100 min of reaction. The removal rate of H acid in thermal activation is positively correlated with temperature. The removal rate of H acid at 65℃ is 77.5%, and the apparent activation energy is 37.85 kJ ·mol-1. Although composite activation speeds up the reaction rate, rapid degradation of PS at high temperatures caused the degradation of H acid to be worse than single thermal activation. The change in PS concentration did not significantly improve the removal rate of H acid, and the inorganic anion CO32- was not conducive to the removal of H acid. Compound activation is not ideal for the mineralization of H acid, and the removal rate of TOC is only 16%. GC-MS identified the degradation product of H acid as terephthalic acid, indicating that phthalic anhydride may be formed after the naphthalene ring is opened. |
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