负载铁改性活性炭对城市污水厂二级出水中溶解性有机物的吸附性能

徐佳瑞; 刘浩; 栾维豪; 王超; 刘长青; 杨延栋

doi:10.13205/j.hjgc.202403008

负载铁改性活性炭对城市污水厂二级出水中溶解性有机物的吸附性能

doi: 10.13205/j.hjgc.202403008

1. 青岛理工大学环境与市政工程学院, 山东青岛 266033;
2. 青岛水务集团环境能源有限公司, 山东青岛 266002

基金项目:

山东省自然科学基金项目(ZR2019BEE070)

山东省高等学校科技计划项目(J18KA207)

详细信息

作者简介:
徐佳瑞(1997-),女,硕士研究生,主要研究方向为城市污水深度处理技术。1014987947@qq.com

通讯作者:
杨延栋,男,讲师,主要研究方向为城市污水处理与资源化利用。yangyandong@qut.edu.cn

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出版历程
- 收稿日期: 2023-05-19
- 网络出版日期: 2024-05-31

ADSORPTION PERFORMANCE OF DISSOLVED ORGANIC MATTER BY IRON-MODIFIED ACTIVATED CARBON FROM SECONDARY EFFLUENT OF WASTEWATER TREATMENT PLANTS

1. School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China;
2. Qingdao Water Group Environmental Energy Co., Ltd., Qingdao 266002, China

摘要

摘要: 采用浸渍法对普通煤质活性炭(AC)进行负载铁改性,探究了负载铁改性活性炭(Fe-AC)对城市污水厂二级出水中溶解性有机物(DOM)的吸附性能。EDS、XRD和FTIR等分析表明,铁成功以Fe₂O₃形式负载在活性炭上。经改性,活性炭比表面积增大29.3%。Fe-AC对二级出水中的DOM有良好的吸附性能,DOC去除率为50.0%~63.5%,UV₂₅₄去除率为71.3%~88.2%,均明显高于AC。Fe-AC对DOM的吸附可用修正的Freundlich等温线很好地描述。此外,Fe-AC对NO₃^-和PO₄^3-也具有良好的吸附效果,去除率分别为55.4%和76.5%。三维荧光光谱和紫外-可见吸收光谱表明,二级出水中的DOM主要为微生物代谢产生的腐植酸类物质,该有机组分可被Fe-AC很好地吸附去除。综上,Fe-AC吸附是一种有效的污水深度处理技术。
- 活性炭 /
- 铁改性 /
- 溶解性有机物 /
- 吸附\二级出水
Abstract: In this study, coal-based activated carbon (AC) was iron-modified using the immersion method. The effectiveness of iron-modified activated carbon (Fe-AC) in adsorbing dissolved organic matter (DOM) from the secondary effluent of wastewater treatment plants was investigated. EDS, XRD, and FTIR confirmed that iron was successfully loaded onto the activated carbon in the form of Fe₂O₃. After modification, the surface area of activated carbon increased by 29.3%. The Fe-AC exhibited good capacity for adsorbing the DOM in secondary effluent, with DOC removal efficiencies of 50.0% to 63.5% and UV₂₅₄ removal efficiencies of 71.3% to 88.2%, both significantly higher than AC. The adsorption of DOM by Fe-AC was well described by a modified Freundlich isotherm. In addition, Fe-AC presented good adsorption performance for NO₃^- and PO₄^3-, with removal efficiencies of 55.4% and 76.5%, respectively. The three-dimensional fluorescence spectrum and UV-visible absorption spectrum indicated that the DOM in secondary effluent is dominated by humic substances produced in microbial metabolism, and these organic components can be effectively adsorbed by Fe-AC. In conclusion, Fe-AC adsorption is an effective technology for advanced wastewater treatment.
- activated carbon /
- iron-modification /
- dissolved organic matter /
- adsorption

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