铁基纤维素微球的制备及其活化过硫酸盐降解盐酸四环素

刘瑞龙; 任小花; 国伟林

doi:10.13205/j.hjgc.202307012

铁基纤维素微球的制备及其活化过硫酸盐降解盐酸四环素

doi: 10.13205/j.hjgc.202307012

济南大学水利与环境学院, 济南 250022

基金项目:

国家自然科学基金项目（51908242）；济南大学科技计划项目（XKY1918）

详细信息

作者简介:
刘瑞龙(1997-),男,硕士研究生,主要研究方向为水污染处理工程。947576286@qq.com

通讯作者:
任小花(1986-),女,讲师,主要研究方向为水污染处理工程。stu_renxh@ujn.edu.cn

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出版历程
- 收稿日期: 2022-04-15

PREPARATION OF IRON-BASED CELLULOSE MICROSPHERES AND ITS ACTIVATION ON PERSULFATE TO DEGRADE TETRACYCLINE HYDROCHLORIDE

School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China

摘要

摘要: 铁基催化剂具有优良的活化过硫酸盐的性能，且价廉易得，受到研究者的广泛关注，然而在现阶段研究铁基催化剂多为粉末材料，存在易团聚、回收困难等问题，制约其实际应用。以醋酸纤维素（CA）为载体，采用液滴微流控技术制备了一种具有较高催化活性的微球催化剂（CA-Fe微球）。采用扫描电镜-能谱仪（SEM-EDS）、傅里叶红外变换光谱仪（FTIR）和比表面积分析仪（BET）对催化剂的形貌、结构和组成进行分析。以CA-Fe微球为催化剂活化过二硫酸盐（PS）降解盐酸四环素（TCH）废水，考察初始TCH浓度、CA-Fe微球投加量和PS投加量等操作条件对TCH去除效果的影响。结果表明：CA-Fe微球对PS具有良好的活化性能，CA-Fe/PS体系能够有效去除TCH。在TCH初始浓度为20 mg/L、PS浓度为2 mmol/L、CA-Fe微球投加量为4 g/L条件下，TCH去除率在85%左右。自由基捕获（EPR）和自由基猝灭实验结果揭示，CA-Fe微球/PS体系中存在的活性自由基为·OH和SO₄^-·，且SO₄^-·在TCH降解中起主要作用。循环利用实验表明，CA-Fe微球具有良好的结构稳定性和循环利用性能，3次循环使用后TCH去除率仍保持在80%左右。研究结果可为铁基纤维素微球/PS催化体系在去除抗生素废水领域的应用提供科学依据。
- 铁基纤维素微球 /
- 微流控 /
- 过二硫酸盐 /
- 盐酸四环素 /
- 高级氧化过程
Abstract: Iron-based catalysts have excellent performance in activating persulfate (PS) and are readily available, attracting extensive attention from researchers. However, most of the iron-based catalysts studied at the current stage are powder materials, and there are problems such as easy agglomeration and difficulty in recycling, which restrict their practical application. In this study, a microsphere catalyst (CA-Fe microspheres) with high catalytic activity was prepared using cellulose acetate (CA) as a carrier by droplet microfluidic technology. The morphology, structure and composition of the catalysts were characterized by SEM-EDS, FTIR and BET. The high catalytic degradation of tetracycline hydrochloride (TCH) in aqueous solution was tested by catalytic activation of PS. The effects of initial TCH concentration, the dosage of CA-Fe microspheres and the dosage of PS on TCH degradation were also investigated. The results showed that the CA-Fe microspheres had good activation performance for PS, and TCH could be effectively degraded in the CA-Fe/PS system. In the condition of the initial TCH concentration of 20 mg/L, the PS concentration of 2 mmol/L, and the CA-Fe microspheres dosage of 4 g/L, the degradation rate of TCH was about 85%. The electron paramagnetic resonance (EPR) and free radical quenching studies revealed that both SO₄^-· and·OH radicals were found in the CA-Fe microspheres/PS system, and the SO₄^-· radical played a major role in the degradation of TCH. Furthermore, the CA-Fe microspheres exhibited excellent structural stability and recycling performance, and the TCH degradation rate remained 80% above after three cycles. The results can provide a scientific basis for the application of cellulose-based magnetic microspheres/PS catalytic systems in the field of removing antibiotic wastewater.
- iron-based cellulose microspheres /
- microfluidics /
- persulfate /
- tetracycline hydrochloride /
- advanced oxidation process (AOPs)

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