Si-FeOOH/H2O2类芬顿降解盐酸四环素废水的效能及其机理

doi:10.11949/j.issn.0438-1157.20150047

化工学报 ›› 2015, Vol. 66 ›› Issue (10): 4244-4251.DOI: 10.11949/j.issn.0438-1157.20150047

Si-FeOOH/H₂O₂类芬顿降解盐酸四环素废水的效能及其机理

蒋胜韬^1,2, 祝建中², 管玉江¹, 白书立¹, 姚俊³, 叶青妹¹

1 台州学院浙江省植物进化生态学与保护重点实验室, 浙江台州 318000;
2 河海大学环境学院浅水湖泊综合治理与资源开发教育部重点实验室, 江苏南京 210098;
3 浙江新农化工股份有限公司, 浙江台州 317300

收稿日期:2015-01-13 修回日期:2015-05-04 出版日期:2015-10-05 发布日期:2015-10-05
通讯作者: 祝建中
基金资助:
浙江省公益性技术应用研究计划项目(2013C33020);浙江省环保科技计划项目(2013B018);江苏高校优势学科建设工程资助项目。

Degradation and mechanism of tetracycline hydrochloride in wastewater by Si-FeOOH /H₂O₂ Fenton-like

JIANG Shengtao^1,2, ZHU Jianzhong², GUAN Yujiang¹, BAI Shuli¹, YAO Jun³, YE Qingmei¹

1 Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, Zhejiang, China;
2 Key Laboratory for Integrated Regulation and Resource Development on Shallow Lake ofMinistry of Education, College of Environment, Hohai University, Nanjing 210098, Jiangsu, China;
3 Zhejiang Xinnong Chemical Industry Co., Ltd., Taizhou 317300, Zhejiang, China

Received:2015-01-13 Revised:2015-05-04 Online:2015-10-05 Published:2015-10-05
Supported by:
supported by the Public Technology Applied Research Fund of Zhejiang Province Science Technology Department (2013C33020), the Scientific Research Fund of Zhejiang Environmental Protection Bureau (2013B018) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘要/Abstract

摘要：

采用碱沉法制备的Si-FeOOH作为非均相类芬顿催化剂,研究其催化降解盐酸四环素废水的效能,考察了催化剂投量、pH、过氧化氢加入量对盐酸四环素降解效能和反应速率的影响。实验结果表明:在催化剂投加量3.0 g·L^-1、H₂O₂投加量9.9 mmol·L^-1、pH为3、室温[(25±1)℃]的条件下,盐酸四环素降解率为90%,一级反应速率常数为0.0504 min^-1。与催化剂FeOOH相比,类芬顿催化剂Si-FeOOH性能更卓越。同时采用探针化合物正丁醇、苯醌,证明了Si-FeOOH /H₂O₂ 催化体系中的氧化活性种主要为羟基自由基(·OH)和超氧自由基(HO₂·), 并推测了其催化反应机理。

关键词: 类芬顿, Si-FeOOH, 盐酸四环素废水, 过氧化氢

Abstract:

The performance of Si-FeOOH, as a type of Fenton-like heterogeneous catalyst made by alkaline precipitation methods, was evaluated with degrading tetracycline hydrochloride (TH) in wastewater and reaction condition including catalyst loading, pH and hydrogen peroxide dosage examined. The results show that the degradation rate of tetracycline hydrochloride can reach up to 90% and the reaction rate 0.0504 min^-1 at catalyst loading 3.0 g·L^-1, H₂O₂ dosage 9.9 mmol·L^-1, pH 3 and temperature (25±1)℃. A comparison with FeOOH catalyst indicates that Fenton-like Si-FeOOH is better than FeOOH. Various contaminants and probe compounds (n-butanol, benzoquinone) were used to identify the active species involved in the catalytic system. The results revealed that the hydroxyl radicals (·OH) and superoxide radical (HO₂·) may be responsible for the degradation of tetracycline hydrochloride (TH). The possible catalytic oxidation mechanism was also discussed. The use of Si-FeOOH /H₂O₂ system may be a feasible approach for the elimination of widely existing pollutants.

Key words: Fenton-like, Si-FeOOH, tetracycline hydrochloride wastewater, hydrogen peroxide

中图分类号:

X703

蒋胜韬, 祝建中, 管玉江, 白书立, 姚俊, 叶青妹. Si-FeOOH/H₂O₂类芬顿降解盐酸四环素废水的效能及其机理[J]. 化工学报, 2015, 66(10): 4244-4251.

JIANG Shengtao, ZHU Jianzhong, GUAN Yujiang, BAI Shuli, YAO Jun, YE Qingmei. Degradation and mechanism of tetracycline hydrochloride in wastewater by Si-FeOOH /H₂O₂ Fenton-like[J]. CIESC Journal, 2015, 66(10): 4244-4251.

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Si-FeOOH/H₂O₂类芬顿降解盐酸四环素废水的效能及其机理

Degradation and mechanism of tetracycline hydrochloride in wastewater by Si-FeOOH /H₂O₂ Fenton-like

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