| 超声辅助熔融草酸法高效绿色再生饱和活性炭 |
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| 引用本文： | 蔡政汉,何晨露,谢海亮,王琼,陈燕丹,吕建华,郑新宇,黄彪,林冠烽. 超声辅助熔融草酸法高效绿色再生饱和活性炭[J]. 化工进展, 2022, 41(4): 2115-2122. DOI: 10.16085/j.issn.1000-6613.2021-0667 |
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| 作者姓名： | 蔡政汉 何晨露 谢海亮 王琼 陈燕丹 吕建华 郑新宇 黄彪 林冠烽 |
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| 作者单位： | 1.武夷学院,福建 武夷山 354300;2.福建农林大学,福建 福州 350002 |
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| 基金项目： | 国家自然科学基金（31770611,31870561）; |
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| 摘 要： | 饱和活性炭的高效绿色再生对活性炭在污染物吸附过程中的循环利用是非常重要的。本文利用超声波辅助熔融草酸的方法对饱和活性炭进行高效绿色再生,讨论了温度、时间、超声振幅和固液比对饱和活性炭再生效率的影响。结果表明,在超声辅助作用下,熔融草酸可在20min内使饱和活性炭得到快速再生,再生效率高达94.72%。通过5次吸附-脱附循环后,再生效率仍可达到78.02%,与此同时有机酸的回收率极高,平均达到98.35%,再生过程十分绿色环保。在超声的辅助作用下,强氢键缔合能力的熔融草酸更充分地与焦糖反应,形成草酸-焦糖强氢键缔合体系,降低焦糖与活性炭表面的亲和力,将焦糖解吸,实现活性炭的再生。该法可为绿色高效的活性炭再生方法的研究开发提供新思路。
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| 关 键 词： | 活性炭 再生 超声辅助 固体有机酸 |
| 收稿时间： | 2021-03-31 |
Method of ultrasonic assisted melting oxalic acid for effective green regeneration of saturated activated carbon |
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| CAI Zhenghan,HE Chenlu,XIE Hailiang,WANG Qiong,CHEN Yandan,LYU Jianhua,ZHENG Xinyu,HUANG Biao,LIN Guanfeng. Method of ultrasonic assisted melting oxalic acid for effective green regeneration of saturated activated carbon[J]. Chemical Industry and Engineering Progress, 2022, 41(4): 2115-2122. DOI: 10.16085/j.issn.1000-6613.2021-0667 |
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| Authors: | CAI Zhenghan HE Chenlu XIE Hailiang WANG Qiong CHEN Yandan LYU Jianhua ZHENG Xinyu HUANG Biao LIN Guanfeng |
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| Affiliation: | 1.Wuyi University, Wuyishan 354300, Fujian, China
2.Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China |
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| Abstract: | The effective green regeneration of saturated activated carbon is very important for the recycling of activated carbon in the process of pollutant adsorption. In this paper, the method of ultrasonic assisted melting oxalic acid was used to regenerate the saturated activated carbon with high efficiency and green. The effects of temperature, time, ultrasonic amplitude and solid-liquid ratio on the regeneration efficiency of saturated activated carbon were discussed. The results showed that the saturated activated carbon can be regenerated rapidly in 20 minutes by molten oxalic acid under the assistance of ultrasound and the regeneration efficiency was as high as 94.72%. After five adsorption desorption cycles, the regeneration efficiency can still reach 78.02% and the recovery rate of organic acids was very high with an average of 98.35%, and thus green regeneration was realized. Under the assistance of ultrasound, the molten oxalic acid with strong hydrogen bond association ability reacted more fully with caramel to form a strong hydrogen bond association system between oxalic acid and caramel, which reduced the affinity between caramel and activated carbon surface. Then, the adsorbate can be desorbed to achieve the regeneration of the activated carbon. This method can provide a new idea for the research and development of green and efficient activated carbon regeneration method. |
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| Keywords: | activated carbon regeneration ultrasound-assisted solid organic acid |
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