Treatment of methylene blue wastewater by catalytic ozonation using Mn-Ce bimetal/activated carbon as catalyst

doi:10.11894/iwt.2018-0667

Industrial Water Treatment ›› 2019, Vol. 39 ›› Issue (8): 60-65. doi: 10.11894/iwt.2018-0667

• Research and Experiment • Previous Articles Next Articles

Treatment of methylene blue wastewater by catalytic ozonation using Mn-Ce bimetal/activated carbon as catalyst

Jingwen Dong¹(),Bo Xing^2,*(),Guo Yang²,Meng Jia²,Xingyong Liu²

1. School of Chemical and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
2. School of Chemical Engineering, Sichuan University of Science and Engineering, Zigong 643000, China

Received:2019-06-26 Online:2019-08-20 Published:2019-08-21
Contact: Bo Xing E-mail:1240548839@qq.com;xingbo0216@163.com
Supported by:
四川理工学院人才引进项目(2018RCL01);四川省教育厅科技创新团队项目(17TD0025)

Mn-Ce双金属/活性炭催化臭氧化处理亚甲基蓝废水

董静文¹(),邢波^2,*(),杨郭²,贾萌²,刘兴勇²

1. 四川理工学院化学与环境工程学院, 四川自贡 643000
2. 四川理工学院化学工程学院, 四川自贡 643000

通讯作者: 邢波 E-mail:1240548839@qq.com;xingbo0216@163.com
作者简介:董静文(1995-),在读硕士研究生。E-mail:1240548839@qq.com
基金资助:
四川理工学院人才引进项目(2018RCL01);四川省教育厅科技创新团队项目(17TD0025)

Abstract

Abstract:

By taking methylene blue(MB) as the research object, the Mn-Ce bimetal/activated carbon catalysts with different relative contents are prepared by same volume impregnation method for the catalytic ozonation of methylene blue wastewater. The pore structure and surface properties of the catalysts are characterized. The results show that the oxidative degradation of MB is in line with pseudo-first order kinetics. The synergy between Mn-Ce bimetal could promote the degradation activity on MB as compared to single ozonation and single metal catalytic ozonation. Under the condition of 20℃, catalyst dosage of 0.4 g/L, pH of 6, and MB initial mass concentration of 200 mg/L, the MB removal rate could reach 100% and the COD removal rate could reach 76.1% when the reaction time is 33 min. The catalyst still shows good catalytic activity even after 5 cycles of use.

Key words: bimetal, activated carbon, catalytic ozonization, dyeing wastewater

摘要：

以亚甲基蓝（MB）为研究对象，采用等体积浸渍法制备了不同相对含量的Mn-Ce双金属/活性炭，催化臭氧化处理MB废水，并对催化剂的孔结构和表面性质进行表征。研究表明，MB的氧化降解符合准一级动力学。与单独臭氧化和单金属催化臭氧化相比，Mn-Ce双金属之间的协同作用可以促进对MB的降解活性。在20 ℃、催化剂投加量为0.4 g/L、pH为6、MB初始质量浓度为200 mg/L的条件下，反应时间为33 min时MB去除率可达100%，COD去除率可达76.1%。催化剂循环使用5次后仍表现良好的催化活性。

关键词: 双金属, 活性炭, 催化臭氧化, 染料废水

CLC Number:

X703

Jingwen Dong,Bo Xing,Guo Yang,Meng Jia,Xingyong Liu. Treatment of methylene blue wastewater by catalytic ozonation using Mn-Ce bimetal/activated carbon as catalyst[J]. Industrial Water Treatment, 2019, 39(8): 60-65.

董静文,邢波,杨郭,贾萌,刘兴勇. Mn-Ce双金属/活性炭催化臭氧化处理亚甲基蓝废水[J]. 工业水处理, 2019, 39(8): 60-65.

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https://www.iwt.cn/EN/Y2019/V39/I8/60

Figures/Tables 11

References 10

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催化剂	SSA_BET（m²·g^-1）/	SSA_micro/（m²·g^-1）	V_t /（cm³·g^-1）	V_micro/（cm³·g^-1）	V_meso/（cm³·g^-1）	pH_surface
AC	700	633	0.336	0.262	0.109	5.02
6%Mn/AC	666	615	0.318	0.257	0.104	6.10
6%Ce/AC	657	592	0.316	0.246	0.099	6.35
4%Mn-2%Ce/AC	594	534	0.295	0.226	0.101	6.25
2%Mn-4%Ce/AC	623	574	0.303	0.244	0.097	6.26
3%Mn-3%Ce/AC	635	591	0.300	0.247	0.091	6.25

催化剂	SSA_BET（m²·g^-1）/	SSA_micro/（m²·g^-1）	V_t /（cm³·g^-1）	V_micro/（cm³·g^-1）	V_meso/（cm³·g^-1）	pH_surface
AC	700	633	0.336	0.262	0.109	5.02
6%Mn/AC	666	615	0.318	0.257	0.104	6.10
6%Ce/AC	657	592	0.316	0.246	0.099	6.35
4%Mn-2%Ce/AC	594	534	0.295	0.226	0.101	6.25
2%Mn-4%Ce/AC	623	574	0.303	0.244	0.097	6.26
3%Mn-3%Ce/AC	635	591	0.300	0.247	0.091	6.25

催化剂	k_app/min^-1	R²	O₃利用率/%^a
单独O₃	0.092	0.997	32.2
AC	0.112	0.998	35.3
6%Mn/AC	0.130	0.998	37.8
6%Ce/AC	0.143	0.998	40.2
4%Mn-2%Ce/AC	0.159	0.997	41.2
2%Mn-4%Ce/AC	0.205	0.994	45.2
3%Mn-3%Ce/AC	0.178	0.996	43.2

催化剂	k_app/min^-1	R²	O₃利用率/%^a
单独O₃	0.092	0.997	32.2
AC	0.112	0.998	35.3
6%Mn/AC	0.130	0.998	37.8
6%Ce/AC	0.143	0.998	40.2
4%Mn-2%Ce/AC	0.159	0.997	41.2
2%Mn-4%Ce/AC	0.205	0.994	45.2
3%Mn-3%Ce/AC	0.178	0.996	43.2

项目		k_app/min^-1	R²
单独臭氧	pH=3	0.081	0.992
	pH=6	0.092	0.997
	pH=10	0.104	0.993
2%Mn-4%Ce/AC + O₃	pH=3	0.098	0.996
	pH=6	0.205	0.994
	pH=10	0.135	0.995

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