| 真空紫外/过二硫酸盐去除饮用水中嗅味物质 |
| 摘要点击 3724 全文点击 1098 投稿时间：2017-09-03 修订日期：2017-11-21 |
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| 中文关键词 真空紫外 过二硫酸盐 硫酸根自由基 2-甲基异莰醇 土臭素 |
| 英文关键词 ultraviolet light persulfate sulfate radicals 2-MIB GSM |
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| 中文摘要 |
| 为解决饮用水嗅味问题，系统研究了真空紫外光（VUV）活化过二硫酸盐（PS）对典型致嗅物质2-甲基异莰醇（2-MIB）和土臭素（GSM）的去除效果及影响因素.结果表明，在PS浓度0.5mmol·L-1的条件下，PS难以去除2-MIB和GSM，VUV/PS联用工艺比VUV对2-MIB和GSM去除率分别提高76%和74%.VUV/PS联用工艺对致嗅物质的去除效果主要受PS浓度和VUV光强影响，在PS浓度0.25~2mmol·L-1，VUV光强113.2~618.5 μW·cm-2增加过程中，2-MIB的去除率分别增加42%和39%，GSM去除率分别增加34%和16%.pH值变化对2-MIB和GSM去除率的影响并不明显；HCO3-离子、腐殖酸的存在则导致2-MIB和GSM去除率的减小，减少程度随HCO3-离子、腐殖酸浓度的增大而增大.VUV/PS联用工艺可有效降解水中致嗅物质，降低后续水处理的难度. |
| 英文摘要 |
| In order to solve the odor problem of drinking water, the performance of a VUV/persulfate process and its influencing factors were investigated systematically for removing odors from 2-MIB and GSM. The results showed that it was difficult to remove 2-MIB and GSM using PS alone with a PS concentration of 0.5 mmol ·L-1, but the removal rates of 2-MIB and GSM by the VUV/PS process could be increased by 76% and 74%, respectively, compared with VUV alone. The performance of the VUV/PS process was mainly affected by the PS concentration and VUV intensity. When the PS concentration increased from 0.25 to 2 mmol ·L-1 and the VUV intensity increased from 113.2 to 618.5 μW ·cm-2, the removal rate of 2-MIB was increased by 42% and 39%, respectively, and the removal rate of GSM was increased by 34% and 16%, respectively. The effect of pH on 2-MIB and GSM removal was not significant. The occurrence of HCO3- and humic acid will decrease the removal rates of 2-MIB and GSM, and the degree of reduction increases with the concentrations of HCO3- ion and humic acid. The VUV/PS process can effectively degrade the typical odorants in water and can reduce the difficulty of subsequent water treatment. |
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