| 超声强化下多相催化臭氧体系处理印染尾水 |
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| 引用本文： | 杨佘维,梁康,许文卿,李朝晖,陈阵,王小琴.超声强化下多相催化臭氧体系处理印染尾水[J].环境科学研究,2021,34(8):1852-1859. |
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| 作者姓名： | 杨佘维 梁康 许文卿 李朝晖 陈阵 王小琴 |
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| 作者单位： | 广东省环境科学研究院,广东广州 510045;广东环科院环境科技有限公司,广东广州 510045;广东省环境科学研究院,广东广州 510045;华南理工大学环境与能源学院,广东广州 510006 |
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| 基金项目： | 广东省公益研究与能力建设专项2016A020221019广东省科技创新战略专项资金项目2019B121205004广东省环保专项资金项目13 of 2021 |
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| 摘 要： | 随着我国对水环境质量要求逐步提高，对于纺织印染废水处理提出了更为严格的排放要求.臭氧(O3)工艺已常用于纺织印染废水深度处理，但存在臭氧利用率低、氧化不彻底等问题.该研究通过自制陶粒催化剂，构建多相催化臭氧氧化体系，以期改善接触条件，提高处理效率，同时在此基础上引入超声波进一步强化体系处理效率.采用扫描电子显微镜(SEM)、X射线衍射(XRD)表征了陶粒催化剂，考察了催化剂投加量、超声波频率对印染尾水的CODCr去除率，并通过三维荧光光谱、GC/MS等分析了反应前后尾水中有机物的变化特征.结果表明:①自制陶粒催化剂表面较为粗糙，晶面尺寸在36~50 nm之间，投入后可提高臭氧(O3)体系对印染尾水的CODCr去除率(提高了10%~15%)，具有较好的催化效率.②引入超声波可进一步提升体系的氧化效率，当超声频率为200 kHz时，出水ρ(CODCr)可达到GB 3838—2002《地表水环境质量标准》Ⅴ类要求.③自制陶粒催化剂与超声波的引入主要促进了芳香性蛋白和溶解性微生物代谢产物的氧化分解，且有效地破坏了长链烷烃、环状烷烃、复杂苯系物等有机物，从而实现印染尾水中ρ(CODCr)的进一步降解.研究显示，自制陶粒催化剂协同超声波可提高O3体系对印染尾水的矿化效率且绿色环保，可为我国水环境敏感区域内纺织印染企业或园区废水深度处理工艺的选择提供参考依据.
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| 关 键 词： | 印染尾水 陶粒催化剂 超声 臭氧(O3) 深度处理 |
| 收稿时间： | 2020-10-27 |
Advanced Treatment of Dyeing and Printing Effluent by Ultrasonic Enhanced Heterogeneous Catalytic Ozonation System |
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| Affiliation: | 1.Guangdong Provincial Academy of Environment Science, Guangzhou 510045, China2.GDAES Environmental Technology Co., Ltd., Guangzhou 510045, China3.School of Environment and Energy, South China University of Technology, Guangzhou 510006, China |
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| Abstract: | With the gradual improvement of water environment quality requirements in China, more stringent wastewater discharge standards have been imposed on textile printing and dyeing enterprises. Ozonization has been widely used for advanced treatment of textile printing and dyeing wastewater, but has technical defects of low utilization efficiency of ozone and incomplete oxidation. A ultrasonic-assisted heterogeneous catalytic ozonation system was constructed by integrating the self-made ceramsite catalyst and ultrasound, and was used for enhancing the treatment of dyeing and printing effluent. The ceramsite catalyst was characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The effects of ceramsite catalytic dosage and ultrasonic frequency on CODCr removal efficiency of dyeing and printing effluent in heterogeneous catalytic oxidation system were studied. The reaction by-products of different organic pollutants treated by the advanced oxidation process were analyzed by three-dimensional fluorescence spectrum and GC/MS. The results showed that ceramsite catalysts had a rough surface with crystal sizes ranging from 36 nm to 50 nm. The CODCr removal efficiency of the dyeing and printing effluent increased by 10%-15% after adding ceramsite catalysts into the ozonation system. Moreover, the CODCr removal efficiency in the ceramsite catalytic ozonation system was further improved by introduction of ultrasound and the ρ(CODCr) of the dyeing and printing effluent could meet the V class of National Environmental Quality Standard for Surface Water (GB 3838-2002). The introduction of ceramsite catalyst and ultrasound can enhance oxidation and decomposition of aromatic proteins and soluble metabolite of microorganism, and effectively destroy organic matters such as long-chain alkanes, cyclic alkanes, complex benzene series, etc., thereby realizing further degradation of ρ(CODCr) in dyeing and printing effluent. The introduction of ceramsite catalyst and ultrasonic wave is demonstrated to be an environmentally friendly approach for improving the mineralization efficiency of the dyeing and printing tail water in the heterogeneous catalytic ozonation system, which can provide a useful reference for advanced treatment of textile printing and dyeing wastewater. |
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