Journal of Radiation Research and Radiation Processing, Volume. 43, Issue 2, 020403(2025)
Catalytic purification of acrylic fiber wastewater by low-temperature plasma in conjunction with K2Fe4O7
Figures & Tables(14)
Fig. 2. XRD pattern of K2Fe4O7 catalyst at different synthesis temperatures
Fig. 3. SEM morphology of K2Fe4O7 catalyst at different reaction temperatures: (a) 160 ℃; (b) 180 ℃; (c) 200 ℃; (d) 220 ℃
Fig. 5. Effect of discharge voltage on the purification efficiency of acrylic wastewater
Fig. 6. Effect of discharge time on purification the efficiency of acrylic fiber wastewater
Fig. 7. Effect of pH on purification efficiency of acrylic fiber wastewate
Fig. 8. Effect of catalyst addition amount on purification efficiency of acrylic fiber wastewater
Fig. 9. Response diagram of interaction factors to COD degradation rate: (a) catalyst addition-discharge voltage interaction term; (b) pH-discharge voltage interaction term;(c) pH-catalyst addition interaction term
Fig. 10. Response diagram of interaction factors to turbidity removal rate: (a) pH-discharge voltage interaction term; (b) pH-catalyst addition interaction term; (c) discharge voltage-catalyst addition interaction term
Table 1. Physical and chemical indexes of raw water of acrylic fiber wastewater
View tableView in ArticleTable 1. Physical and chemical indexes of raw water of acrylic fiber wastewater
指标
Index
pH COD
/ (mg·L-1)
吸光度
Absorbance
浊度 / NTU
Turbidity
数值
Value
8.47 600 0.674 105.7
Table 2. Factors of experimental design for degradation of acrylic fiber wastewater
View tableView in ArticleTable 2. Factors of experimental design for degradation of acrylic fiber wastewater
水平 Level A/ kV B/ g C -1 20 0.02 2 0 30 0.05 4 1 40 0.08 6
Table 3. Response surface experiment scheme and results
View tableView in ArticleTable 3. Response surface experiment scheme and results
编号
Number
A
/ kV
B
/ g
C Y1
COD降解率 / %
COD degradation
Y2
浊度去除率 / %
Turbidity removal rate
1 -1 -1 0 73.50 87.77 2 1 -1 0 67.63 90.05 3 -1 1 0 67.27 90.33 4 1 1 0 55.22 84.12 5 -1 0 -1 38.96 90.81 6 1 0 -1 76.96 87.77 7 -1 0 1 64.74 88.53 8 1 0 1 63.33 66.78 9 0 -1 -1 72.27 67.23 10 0 1 -1 71.75 91.81 11 0 -1 1 49.38 80.62 12 0 1 1 45.70 91.06 13 0 0 0 75.10 90.36 14 0 0 0 70.47 75.91 15 0 0 0 79.51 89.48 16 0 0 0 50.49 89.98 17 0 0 0 69.74 88.99
Table 4. Results of variance analysis and significance experiment of response surface model
View tableView in ArticleTable 4. Results of variance analysis and significance experiment of response surface model
响应值
Response value
方差来源
Sources of variance
平方和
Sum of squares
自由度
Degrees of freedom
均方
Mean square
F值
F value
p值
pvalue
COD降解率 / % 模型Model 2 217.48 9 246.39 17.15 0.000 6 COD degradation A 169.65 1 169.65 11.81 0.010 9 B 30.62 1 30.62 2.13 0.187 7 C 1 474.52 1 1 474.52 102.66 ＜0.000 1 AB 7.21 1 7.21 0.50 0.501 6 AC 2.27 1 2.27 0.16 0.703 1 BC 4.45 1 4.45 0.31 0.595 0 A2 329.26 1 329.26 22.92 0.002 0 B2 67.89 1 67.89 4.73 0.066 2 C2 84.90 1 84.90 5.91 0.045 3 残差Residual 100.54 7 14.36 - - 失拟项Lack of fit 54.54 3 18.18 1.58 0.326 3 纯误差Pure error 46.01 4 11.50 - - 总离差Cor total 2 318.02 16 - - - 浊度去除率 / % 模型Model 1 021.01 9 113.45 53.84 ＜0.000 1 Turbidity removal rate A 31.96 1 31.96 15.07 0.006 0 B 81.66 1 81.66 38.50 0.000 4 C 580.55 1 580.55 273.70 ＜0.000 1 AB 0.828 1 1 0.828 1 0.39 0.551 9 AC 11.73 1 11.73 5.53 0.051 0 BC 36.12 1 36.12 17.03 0.004 4 A2 7.17 1 7.17 3.38 0.108 5 B2 0.000 7 1 0.000 7 0.000 3 0.986 2 C2 264.46 1 264.46 124.68 ＜0.000 1 残差Residual 14.85 7 2.12 - - 失拟项Lack of fit 8.71 3 2.90 1.89 0.271 9 纯误差Pure error 6.14 4 1.53 - - 总离差Cor total 1 035.86 16 - - -
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Junfeng RONG, Jiali ZHU, Binbin ZHAO, Fan PAN, Chengyuan ZHANG, Minggong CHEN. Catalytic purification of acrylic fiber wastewater by low-temperature plasma in conjunction with K2Fe4O7[J]. Journal of Radiation Research and Radiation Processing, 2025, 43(2): 020403
Paper Information
Category: RADIATION TECHNOLOGY APPLICATION
Received: Aug. 29, 2024
Accepted: Oct. 8, 2024
Published Online: May. 16, 2025
The Author Email: Junfeng RONG (13695610310@163.com)
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