NUCLEAR TECHNIQUES, Volume. 47, Issue 3, 030303(2024)
Optimization of carbon extraction from water by wet oxidation
Figures & Tables(8)
Fig. 2. Effect of different reagent dosing times and sequences on efficiency of carbon conversion
Fig. 3. Variation of mean oxidation efficiency of each factor at each level with the level
Table 1. Three different ways to deliver reagents
View tableView in ArticleTable 1. Three different ways to deliver reagents
方式
Method
、试剂添加的时间与顺序
Time and order of reagent addition
、① 加入磷酸反应2.5 h后，按Na2S2O8、AgNO3、H2O2、FeSO4的顺序依次加入继续反应2.5 hAfter adding phosphoric acid for 2.5 h, Na2S2O8, AgNO3, H2O2, FeSO4 were added in order to continue reaction for 2.5 h ② 加入微量磷酸调节水样pH至7，按FeSO4、H2O2、Na2S2O8、AgNO3的顺序依次加入反应1.5 h后，再加入磷酸继续反应2 h Add a trace amount of phosphoric acid to adjust the pH of the water sample to 7, and then add FeSO4, H2O2, Na2S2O8, AgNO3 successively for 1.5 h, and then add phosphoric acid for another 2 h ③ 依次加入磷酸、Na2S2O8、AgNO3、FeSO4、H2O2后反应3 h（其中每种试剂添加的间隔用20 mL去离子水冲洗试剂投放管道）H3PO4, Na2S2O8, AgNO3, FeSO4 and H2O2 were added successively and reacted for 3 h (20 mL of deionized water was used to flush the reagent delivery pipe at the interval of each reagent addition)
Table 2. Orthogonal test for screening the optimal amount and ratio of reagents
View tableView in ArticleTable 2. Orthogonal test for screening the optimal amount and ratio of reagents
实验号
Number of experiment
、A Na2S2O8
/ mmol∙L-1
、B H2O2
/ mmol∙L-1
、C AgNO3
/ mmol∙L-1
、D FeSO4
/ mmol∙L-1
、E H3PO4
/ mmol∙L-1
、氧化效率
Oxidation efficiency / %
、1 18.49 14.69 0.05 0.18 25.35 81.89±0.45 2 18.49 19.58 0.25 0.54 50.70 85.73±0.27 3 18.49 24.48 0.45 0.90 76.05 89.10±0.37 4 18.49 29.37 0.65 1.26 101.4 88.04±0.26 5 21.85 14.69 0.25 0.90 101.4 90.95±0.40 6 21.85 19.58 0.05 1.26 76.05 91.85±0.28 7 21.85 24.48 0.65 0.18 50.70 92.81±0.20 8 21.85 29.37 0.45 0.54 25.35 83.29±0.43 9 25.21 14.69 0.45 1.26 50.70 91.68±0.38 10 25.21 19.58 0.65 0.90 25.35 90.86±0.30 11 25.21 24.48 0.05 0.54 101.4 88.53±0.24 12 25.21 29.37 0.25 0.18 76.05 87.58±0.44 13 28.57 14.69 0.65 0.54 76.05 92.44±0.24 14 28.57 19.58 0.45 0.18 101.4 91.67±0.36 15 28.57 24.48 0.25 1.26 25.35 91.88±0.30 16 28.57 29.37 0.05 0.90 50.70 89.17±0.42 86.19 89.24 87.86 88.49 86.98 89.73 90.02 89.03 87.50 89.85 89.66 90.58 88.93 90.02 90.24 91.29 87.02 91.04 90.86 89.80 L 4 3 4 4 3 R 5.1 3.56 3.18 3.37 3.27
Table 3. Extraction rate of organic carbon and partial organic components in the experimental water sample
View tableView in ArticleTable 3. Extraction rate of organic carbon and partial organic components in the experimental water sample
水样类型
Type of water sample
、有机物类型
Type of organic matter
、分子数量占比
Proportion of molecule / %
、氧化效率
Oxidation efficiency / %
、自配标准水
Own standard water
蔗糖Sucrose ― >96 环境水
Environmental water
总有机物Total organic compounds ― 93.4±0.2 碳水化合物类Carbohydrate 0.08 94.5±0.6 类蛋白类Proteinoid 3.85 97.6±0.3 脂质类Lipoid 2.74 97.7±0.4 单宁酸类Tannin 6.15 88.4±0.2 木质素类Lignose 23.9 99.6±0.2 稠环化合物Condensed nucleus compounds 33.8 95.0±0.2
Table 4. Transformation efficiency of organic carbon after combined use of ultraviolet and wet oxidation
View tableView in ArticleTable 4. Transformation efficiency of organic carbon after combined use of ultraviolet and wet oxidation
实验号
Number of experiment
、试剂用量配比 Reagent dosage and ratio 效率
Efficiency / %
、H3PO4（98%）
/ mL
、Na2S2O8
/ g
、AgNO3（0.1 mol∙L-1） / mL FeSO4·7H2O
/ g
、H2O2（30%）
/ mL
、1 1.2 1.36 1.3 0.07 0.5 91.4±1.1 2 1.3 1.6 1.4 ― ― 94.2 3 1.3 1.6 1.4 ― ― 96.9 4 1.3 1.6 1.4 ― ― 95.7
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Lei LI, Wei LIU, Yuhua MA, Zhiqiang LI, Ke DENG, Linlin ZENG, Yong XU. Optimization of carbon extraction from water by wet oxidation[J]. NUCLEAR TECHNIQUES, 2024, 47(3): 030303
Paper Information
Category: Research Articles
Received: Nov. 17, 2023
Accepted: --
Published Online: Apr. 29, 2024
The Author Email: Yuhua MA (MAYuhua), Zhiqiang LI (LIZhiqiang)
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