Degradation of alkaline high-concentration organic wastewater by zero-valent iron and activated carbon activated persulfate

doi:10.11894/iwt.2019-0006

Industrial Water Treatment ›› 2020, Vol. 40 ›› Issue (2): 83-86, 91. doi: 10.11894/iwt.2019-0006

• Research and Experiment • Previous Articles Next Articles

Degradation of alkaline high-concentration organic wastewater by zero-valent iron and activated carbon activated persulfate

Xuerui Zhao¹(),Feng Liu^1,^2,*(),Jiabin Chen¹,Tianyin Huang¹,Zhonghe Ma³

1. School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
2. National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215000, China
3. Jiangsu Heshun Environmental Protection Co., Ltd., Suzhou 215000, China

Received:2019-10-31 Online:2020-02-20 Published:2020-02-22
Contact: Feng Liu E-mail:472736525@qq.com;278834585@qq.com
Supported by:
苏州市科研计划项目(SS201722)

铁炭活化过硫酸盐降解碱性高浓度有机废液

赵雪瑞¹(),刘锋^1,^2,*(),陈家斌¹,黄天寅¹,马忠贺³

1. 苏州科技大学环境科学与工程学院, 江苏苏州 215009
2. 城市生活污水资源化利用技术国家地方联合工程实验室, 江苏苏州 215000
3. 江苏和顺环保有限公司, 江苏苏州 215000

通讯作者: 刘锋 E-mail:472736525@qq.com;278834585@qq.com
作者简介:赵雪瑞(1994-),在读硕士研究生。电话:18737516103, E-mail:472736525@qq.com
基金资助:
苏州市科研计划项目(SS201722)

Abstract

Abstract:

The organic wastewater of alkaline high-concentration plating tank was treated by advanced oxidation technology of persulfate(PS) activated with zero-valent iron(Fe) and activated carbon(AC). Under the conditions of initial COD higher than 10 000 mg/L and pH over 7, the effects of PS dosages, zero-valent iron and AC dosages, initial pH, and reaction time on the degradation process were investigated, respectively. The optimal conditions for degradation were determined by orthogonal experiments. Results showed the optimum reaction conditions were at PS dosage of 22 g/L, zero-valent iron dosage of 4.8 g/L, AC dosage of 1.2 g/L and initial pH of 11 for reaction time of 3 h. Under this condition, the removal rates of COD reached 86.40%, and the removal rates of TOC and TP reached 66.95% and 96.50%, respectively. Besides, fitting results indicated the COD degradation followed the first-order kinetics equation well.

Key words: alkaline organic wastewater, persulfate, zero-valent iron, activated carbon

摘要：

采用零价铁与活性炭协同活化过硫酸盐处理碱性高浓度电镀槽有机废液。在原水COD ≥ 10 000 mg/L，pH为碱性的条件下，考察了过硫酸钠、零价铁与活性炭投加量以及反应时间、初始pH等因素对COD去除效果的影响，并通过正交实验确定了降解最优条件。结果表明：在过硫酸钠投加量为22 g/L，零价铁投加量为4.8 g/L，活性炭投加量为1.2 g/L，初始pH为11，反应时间为3 h的最优条件下，COD去除率达86.40%，TOC、TP去除率分别为66.95%、96.50%。对COD的降解过程符合一级反应动力学方程。

关键词: 碱性有机废液, 过硫酸盐, 零价铁, 活性炭

CLC Number:

X703.1

Xuerui Zhao,Feng Liu,Jiabin Chen,Tianyin Huang,Zhonghe Ma. Degradation of alkaline high-concentration organic wastewater by zero-valent iron and activated carbon activated persulfate[J]. Industrial Water Treatment, 2020, 40(2): 83-86, 91.

赵雪瑞,刘锋,陈家斌,黄天寅,马忠贺. 铁炭活化过硫酸盐降解碱性高浓度有机废液[J]. 工业水处理, 2020, 40(2): 83-86, 91.

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URL: https://www.iwt.cn/EN/10.11894/iwt.2019-0006

https://www.iwt.cn/EN/Y2020/V40/I2/83

Figures/Tables 9

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项目	COD/（mg·L^-1）	TOC/（mg·L^-1）	TP/（mg·L^-1）	pH	电导率/（μS·cm^-1）	Ni/（mg·L^-1）	Cu/（mg·L^-1）
原水	187 000	40 768	397	11.5	3 500	64.6	66.8
实验水样	≥10 000	2 548	24.8	11	640	4	4.2

项目	COD/（mg·L^-1）	TOC/（mg·L^-1）	TP/（mg·L^-1）	pH	电导率/（μS·cm^-1）	Ni/（mg·L^-1）	Cu/（mg·L^-1）
原水	187 000	40 768	397	11.5	3 500	64.6	66.8
实验水样	≥10 000	2 548	24.8	11	640	4	4.2

因素水平	A PS/（g·L^-1）	B pH	C Fe/（g·L^-1）	D AC/（g·L^-1）
1	22	10	3.6	0.9
2	17	11	4.8	1.2
3	30	12	6.0	1.5

因素水平	A PS/（g·L^-1）	B pH	C Fe/（g·L^-1）	D AC/（g·L^-1）
1	22	10	3.6	0.9
2	17	11	4.8	1.2
3	30	12	6.0	1.5

实验编号	影响因素				COD去除率/%
实验编号	A	B	C	D	COD去除率/%
1	1	1	1	1	60.50
2	1	2	2	2	86.40
3	1	3	3	3	74.10
4	2	1	2	3	51.00
5	2	2	3	1	50.40
6	2	3	1	2	45.20
7	3	1	3	2	63.40
8	3	2	1	3	53.10
9	3	3	2	1	69.70
K₁	221.00	174.90	158.80	180.60
K₂	146.10	189.90	207.10	195.00
K₃	186.20	189.00	187.90	178.20
k₁	73.67	58.30	52.93	60.2
k₂	48.87	63.30	69.03	65
k₃	62.07	63	62.63	59.40
R	24.8	5	16.1	5.6

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