Preparation of heterogeneous Fenton catalyst and its degradation effect on aniline aerofloat

doi:10.11894/iwt.2020-0116

Abstract

Abstract:

Fe/Mn-GAC bimetallic catalyst was prepared by cyclic pyrolysis with the granular activated carbon as the carrier. The preparation parameters of Fe/Mn-GAC were optimized by response surface methodology(RSM). The physicochemical properties of Fe/Mn-GAC bimetallic catalyst were characterized, and the performance and kinetics of the degradation of aniline aerofloat by Fenton reaction were investigated. Results showed that the response surface quadratic regression model was of high significance. Each factor had significant influence on catalytic performance of Fe/Mn-GAC and the degradation efficiency of aniline aerofloat. The optimal preparation parameters were determined as 9.5 of Fe-Mn ion concentration ratio, 362.07℃ of temperature, and 1.09 mol/L of the total concentration of iron-manganese ions. The removal efficiency of aniline aerofloat in the Fenton system catalyzed by Fe/Mn-GAC was 97.164%, and the degradation reaction was in accordance with pseudo-first-order kinetics.

Key words: response surface optimization, bimetallic catalyst, heterogeneous Fenton, aniline aerofloat

摘要：

以颗粒活性炭为载体，采用循环热解法制备了铁锰双金属催化剂Fe/Mn-GAC，用响应面法优化Fe/Mn-GAC的制备条件参数，并对Fe/Mn-GAC进行表征，考察以其为催化剂构成的非均相Fenton体系降解苯胺黑药的性能及动力学。结果表明：响应面二次回归模型的拟合相关性高，各因素对Fe/Mn-GAC的催化性能和苯胺黑药的降解效能有显著影响，优化后的制备条件参数为铁锰离子浓度比9.50、制备温度362.07℃、铁锰总离子浓度1.09 mol/L，该非均相Fenton体系降解苯胺黑药的去除率为97.164%，降解符合准一级动力学。

关键词: 响应面优化, 双金属催化剂, 非均相Fenton, 苯胺黑药

CLC Number:

X703.1

Ye Liu,Baolin Hou,Bozhi Ren,Xu Liu. Preparation of heterogeneous Fenton catalyst and its degradation effect on aniline aerofloat[J]. Industrial Water Treatment, 2020, 40(12): 69-73.

刘烨,侯保林,任伯帜,刘旭. 非均相Fenton催化剂的制备及对苯胺黑药的降解效果[J]. 工业水处理, 2020, 40(12): 69-73.

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https://gyscl.magtechjournal.com/EN/Y2020/V40/I12/69

Figures/Tables 9

References 10

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因素	编码	水平
因素	编码	-1	0	+1
铁锰比	X₁	4.00	8.00	12.00
制备温度/℃	X₂	300	350	400
总离子浓度/（mol·L^-1）	X₃	0.75	1.00	1.25

因素	编码	水平
因素	编码	-1	0	+1
铁锰比	X₁	4.00	8.00	12.00
制备温度/℃	X₂	300	350	400
总离子浓度/（mol·L^-1）	X₃	0.75	1.00	1.25

序号	铁锰比X₁	制备温度X₂/℃	总离子浓度X₃/（mol·L^-1）	苯胺黑药去除率Y/%
1	4.00	300	0.75	73.12
2	12.00	300	0.75	74.88
3	4.00	400	0.75	80.83
4	12.00	400	0.75	88.25
5	4.00	300	1.25	74.86
6	12.00	300	1.25	82.79
7	4.00	400	1.25	79.26
8	12.00	400	1.25	89.83
9	4.00	350	1.00	83.95
10	12.00	350	1.00	90.86
11	8.00	300	1.00	84.36
12	8.00	400	1.00	92.23
13	8.00	350	0.75	93.48
14	8.00	350	1.25	94.54
15	8.00	350	1.00	95.19
16	8.00	350	1.00	95.25
17	8.00	350	1.00	95.48
18	8.00	350	1.00	95.76
19	8.00	350	1.00	95.56
20	8.00	350	1.00	96.35

序号	铁锰比X₁	制备温度X₂/℃	总离子浓度X₃/（mol·L^-1）	苯胺黑药去除率Y/%
1	4.00	300	0.75	73.12
2	12.00	300	0.75	74.88
3	4.00	400	0.75	80.83
4	12.00	400	0.75	88.25
5	4.00	300	1.25	74.86
6	12.00	300	1.25	82.79
7	4.00	400	1.25	79.26
8	12.00	400	1.25	89.83
9	4.00	350	1.00	83.95
10	12.00	350	1.00	90.86
11	8.00	300	1.00	84.36
12	8.00	400	1.00	92.23
13	8.00	350	0.75	93.48
14	8.00	350	1.25	94.54
15	8.00	350	1.00	95.19
16	8.00	350	1.00	95.25
17	8.00	350	1.00	95.48
18	8.00	350	1.00	95.76
19	8.00	350	1.00	95.56
20	8.00	350	1.00	96.35

项目	平方和	自由度	均方	F值	假定值Prob>F
回归模型	1 195.41	9	132.82	296.50	< 0.000 1
X₁	119.65	1	119.54	267.09	< 0.000 1
X₂	163.14	1	163.14	364.17	< 0.000 1
X₃	11.49	1	11.49	25.65	0.000 5
X₁X₂	8.61	1	8.61	19.22	0.001 4
X₁X₃	10.86	1	10.86	24.24	0.000 5
X₂X₃	11.62	1	11.62	25.93	0.000 6
X₁²	153.83	1	153.83	343.39	< 0.000 1
X₂²	119.39	1	119.39	266.52	< 0.000 1
X₃²	2.10	1	2.10	4.69	0.055 6
残差值	4.48	10	0.45	4.01	0.076 9
失拟项	3.59	5	0.72
纯误差	0.89	5	0.18
总和	1 199.89	19

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