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Fenton-UV照射法对超高浓度聚乙烯醇有机废液的降解效能

刘夏杰, 刘峰, 詹杰, 李家文, 何烨, 林鹏

刘夏杰, 刘峰, 詹杰, 李家文, 何烨, 林鹏. Fenton-UV照射法对超高浓度聚乙烯醇有机废液的降解效能[J]. 核化学与放射化学, 2021, 43(6): 517-522. DOI: 10.7538/hhx.2021.YX.2021054
引用本文: 刘夏杰, 刘峰, 詹杰, 李家文, 何烨, 林鹏. Fenton-UV照射法对超高浓度聚乙烯醇有机废液的降解效能[J]. 核化学与放射化学, 2021, 43(6): 517-522. DOI: 10.7538/hhx.2021.YX.2021054
LIU Xia-jie, LIU Feng, ZHAN Jie, LI Jia-wen, HE Ye, LIN Peng. Degradation Efficiency of Ultra-High-Concentration Polyvinyl Alcohol Organic Waste Liquid by Fenton-UV Irradiation[J]. Journal of Nuclear and Radiochemistry, 2021, 43(6): 517-522. DOI: 10.7538/hhx.2021.YX.2021054
Citation: LIU Xia-jie, LIU Feng, ZHAN Jie, LI Jia-wen, HE Ye, LIN Peng. Degradation Efficiency of Ultra-High-Concentration Polyvinyl Alcohol Organic Waste Liquid by Fenton-UV Irradiation[J]. Journal of Nuclear and Radiochemistry, 2021, 43(6): 517-522. DOI: 10.7538/hhx.2021.YX.2021054

Fenton-UV照射法对超高浓度聚乙烯醇有机废液的降解效能

Degradation Efficiency of Ultra-High-Concentration Polyvinyl Alcohol Organic Waste Liquid by Fenton-UV Irradiation

  • 摘要: 采用Fenton-紫外照射(Fenton-UV)联用工艺对核电厂超高浓度聚乙烯醇(PVA)有机废液进行处理,研究了PVA转化率、平均分子量、溶液黏度等随时间的变化规律。结果表明:对于50 g/L的PVA溶液,H2O2投加质量浓度为15 g/L,FeSO4·7H2O投加质量浓度为0.050 g/L,初始pH值为3,经过2 h Fenton反应和2 h UV照射(3 mW/cm2)之后,PVA转化率达到100%,溶液平均分子量从60 000~80 000 Da降低到1 000 Da以下,黏度降低到1.1 mPa·s,但总有机碳和化学需氧量(COD)变化不大。Fenton-UV法可作为预处理方法,前期Fenton阶段提高PVA的溶解度,增加反应溶液中的PVA含量,并进行初步降解和氧化;后期UV法进一步降解溶液中的PVA,有效降低其分子量和黏度,为后续处理提供有利条件,最终形成经济可行的超高浓度PVA有机废液处理工艺。
    Abstract: Fenton-ultraviolet irradiation(Fenton-UV) combined process was used to treat ultra-high-concentration polyvinyl alcohol(PVA) organic waste liquid of nuclear power plants, and the changes of PVA conversion rate, average molecular weight, solution viscosity, etc. over time were studied. The results show: for 50 g/L PVA solution, the concentration of H2O2 is 15 g/L, the concentration of FeSO4·7H2O is 0.050 g/L, the initial pH is 3, after 2 h Fenton reaction followed by 2 h UV irradiation(3 mW/cm2), the removal efficiency of PVA reaches 100%, and the average molecular weight in solution decreases from 60 000~80 000 Da to <1 000 Da. The viscosity decreases to 1.1 mPa·s, while only slight variations are observed for total organic carbon and COD. Fenton-UV method can be used as a pre-treatment. In the former Fenton stage, the solubility increases, and the concentration of PVA in solution can reach a very high level. A preliminary degradation and oxidation are also conducted in this stage. During the later UV stage, PVA can be further degraded, and the molecular weight and viscosity are significantly decreased. Fenton-UV treatment will be benefit to the further treatment, and it can be a cost-effective treatment method for ultra-high concentration PVA solution.
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  • 期刊类型引用(1)

    1. 罗丹,郭丽潇,郝全爱,黄淑龙,石亮. 芬顿氧化法处理氧化性泡沫去污废液中的有机物. 核化学与放射化学. 2024(02): 170-176 . 本站查看

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  • 刊出日期:  2021-12-19

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