Optimization of NaHSO3 enhanced Fe2+/persulfate system for treatment of eriochrome black T wastewater by response surface methods

doi:10.19965/j.cnki.iwt.2020-0937

Abstract

Abstract:

Eriochrome black T(EBT) was degraded by strengthening Fe²⁺/persulfate(PS) system with sodium bisulfite(NaHSO₃). Based on single factor experimental results, Fe²⁺ concentration, NaHSO₃ dosage and PS concentration were selected as the investigation factors, and EBT removal rate was taken as response value, a quadratic mathematical model was established by Box-Behnken response surface method to analyze the influence of various factors and their interactions on EBT degradation. The optimal condition were Fe²⁺ 0.08 mmol/L, NaHSO₃ dosage 0.90 mmol/L and PS 1.00 mmol/L respectively, and the predicted EBT removal rate was 93.7%. The average result of verification test was 92.76%, which had a deviation of 0.94% compared with the predicted value.

Key words: sodium bisulfite, persulfate, eriochrome black T, response surface methodology

摘要：

采用亚硫酸氢钠（NaHSO₃）强化Fe²⁺/过硫酸盐（PS）体系降解铬黑T（EBT）。基于单因素实验结果，以Fe²⁺浓度、NaHSO₃投加量和PS浓度作为考察因素，EBT去除率为响应值，采用Box-Behnken响应曲面法建立二次数学模型，分析各因素及其交互作用对EBT降解的影响。在模型优化条件，即Fe²⁺浓度0.08 mmol/L、NaHSO₃投加量0.90mmol/L、PS浓度1.00 mmol/L条件下，预测EBT去除率为93.7%。验证实验平均结果为92.76%，与预测值偏差为0.94%。

关键词: 亚硫酸氢钠, 过硫酸盐, 铬黑T, 响应曲面法

CLC Number:

TQ028.8

Shuai An,Haisong Li. Optimization of NaHSO₃ enhanced Fe²⁺/persulfate system for treatment of eriochrome black T wastewater by response surface methods[J]. Industrial Water Treatment, 2021, 41(7): 112-116.

安帅,李海松. NaHSO₃强化Fe²⁺/过硫酸盐体系处理铬黑T废水的优化[J]. 工业水处理, 2021, 41(7): 112-116.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2020-0937

https://www.iwt.cn/EN/Y2021/V41/I7/112

Figures/Tables 10

References 14

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影响因素	编码及水平
影响因素	-1	0	1
A（Fe²⁺）/（mmol·L^-1）	0.01	0.06	0.10
B（NaHSO₃）/（mmol·L^-1）	0.10	0.50	0.90
C（PS）/（mmol·L^-1）	0.20	0.60	1.00

影响因素	编码及水平
影响因素	-1	0	1
A（Fe²⁺）/（mmol·L^-1）	0.01	0.06	0.10
B（NaHSO₃）/（mmol·L^-1）	0.10	0.50	0.90
C（PS）/（mmol·L^-1）	0.20	0.60	1.00

序号	Fe²⁺/（mmol·L^-1）	NaHSO₃/（mmol·L^-1）	PS/（mmol·L^-1）	EBT去除率/%
1	0.10	0.50	1.00	85.68
2	0.06	0.50	0.60	66.11
3	0.01	0.10	0.60	30.56
4	0.06	0.10	1.00	70.45
5	0.06	0.50	0.60	67.87
6	0.06	0.50	0.60	65.79
7	0.06	0.90	0.20	42.64
8	0.06	0.10	0.20	46.32
9	0.10	0.10	0.60	51.56
10	0.01	0.90	0.60	40.68
11	0.06	0.50	0.60	65.89
12	0.01	0.50	1.00	46.88
13	0.06	0.50	0.60	69.12
14	0.10	0.90	0.60	66.22
15	0.06	0.90	1.00	86.24
16	0.01	0.50	0.20	29.81
17	0.10	0.50	0.20	41.34

序号	Fe²⁺/（mmol·L^-1）	NaHSO₃/（mmol·L^-1）	PS/（mmol·L^-1）	EBT去除率/%
1	0.10	0.50	1.00	85.68
2	0.06	0.50	0.60	66.11
3	0.01	0.10	0.60	30.56
4	0.06	0.10	1.00	70.45
5	0.06	0.50	0.60	67.87
6	0.06	0.50	0.60	65.79
7	0.06	0.90	0.20	42.64
8	0.06	0.10	0.20	46.32
9	0.10	0.10	0.60	51.56
10	0.01	0.90	0.60	40.68
11	0.06	0.50	0.60	65.89
12	0.01	0.50	1.00	46.88
13	0.06	0.50	0.60	69.12
14	0.10	0.90	0.60	66.22
15	0.06	0.90	1.00	86.24
16	0.01	0.50	0.20	29.81
17	0.10	0.50	0.20	41.34

方差来源	方差和	自由度	均方差	F值	P值	显著性
模型	4 813.40	9	534.82	105.21	＜0.000 1	高度显著
A	1 172.97	1	1 172.97	230.74	＜0.000 1
B	170.11	1	170.11	33.46	0.000 7
C	2 084.64	1	2 084.64	410.08	＜0.000 1
AB	5.15	1	5.15	1.01	0.347 6
AC	185.91	1	185.91	36.57	0.000 5
BC	94.77	1	94.77	18.64	0.003 5
A²	959.15	1	959.15	188.68	＜0.000 1
B²	89.40	1	89.40	17.59	0.004 1
C²	3.68	1	3.68	0.72	0.422 7
残差	35.58	7	5.08
失拟项	26.85	3	8.95	4.10	0.103 1
纯误差	8.73	4	2.18
总和	4 848.98	16

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Optimization of NaHSO₃ enhanced Fe²⁺/persulfate system for treatment of eriochrome black T wastewater by response surface methods

NaHSO₃强化Fe²⁺/过硫酸盐体系处理铬黑T废水的优化

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