超声-电絮凝法降解垃圾渗滤液中难降解腐殖质及其副产物

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-08-26 DOI:10.1002/jctb.70050

Shefaa Omar Abu-Nassar, Nurul Hana Mokhtar Kamal, Herni Halim, Mohd Suffian Yusoff, Mohammed JK Bashir, Mahmoud Zuhier Aldrabseh, Amani Abdallah Assolie

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引用次数: 0

摘要

垃圾渗滤液中含有高浓度的难降解有机物，特别是腐植酸（HA）和黄腐酸（FA），由于其复杂的结构和分子量而难以降解。本研究评估了超声-电凝（US-EC）联合工艺降解这些物质的有效性。关键处理参数，如总有机碳（TOC），颜色，254 nm紫外光（UV₂₅₄）和紫外线可见性用于评估性能。傅里叶变换红外（FTIR）和紫外可见光谱（UV-visible spectroscopy）分析了有机物的结构变化，而能量色散x射线（EDX）分析提供了元素组成和污染物转化的见解。结果确定最佳条件为表面积体积比7 m−1，电极间距3 cm，电流密度50 mA m−2，搅拌速度200 rpm，电解时间30 min。US-EC工艺将TOC去除率从41%（仅EC）提高到47%，颜色去除率从83.5%提高到88.2%。原渗滤液的UV254吸光度为14.78，经EC和US-EC处理后分别降至7.18和6.23。光谱分析证实，这种还原表明芳香性和分子量较低。此外，根据EDX的结果，副产品含有高浓度的氧、碳和氮。FTIR分析显示，在3450 cm−1 (OH)， 1530 cm−1和1400 cm−1 （C - C）和570 cm−1 （C - H）处有显著的峰，支持EC和US-EC对有机物的有效去除。结论与单独使用EC相比，US-EC联合工艺对垃圾渗滤液中难降解有机物的去除效果更好。尽管能耗从57.8 kWh kg−1 TOC显著增加到349 kWh kg−1，但该工艺提高了降解效率并改善了环境性能，表明其在高级渗滤液处理应用中的巨大潜力。©2025作者。由John Wiley &； Sons Ltd代表美国化学工业学会（SCI）出版的化学技术与生物技术杂志。

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$Degradation of refractory humic substances and by-product formation in landfill leachate using ultrasonic–electrocoagulation$

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Degradation of refractory humic substances and by-product formation in landfill leachate using ultrasonic–electrocoagulation

BACKGROUND

Landfill leachate contains high levels of refractory organic matter, particularly humic acid (HA) and fulvic acid (FA), which are difficult to degrade due to their complex structures and molecular weight. This study evaluates the effectiveness of a combined ultrasonic–electrocoagulation (US-EC) process for degrading these substances. Key treatment parameters such as total organic carbon (TOC), color, 254 nm ultraviolet light (UV₂₅₄), and UV–visible were used to assess performance. Fourier transform infrared (FTIR) and UV–visible spectroscopy were employed to analyze structural changes in organic matter, while energy-dispersive X-ray (EDX) analysis provided insights into elemental composition and pollutant transformation.

RESULTS

Optimal conditions were identified as a surface area-to-volume ratio of 7 m⁻¹, electrode spacing of 3 cm, current density of 50 mA m⁻², stirring speed of 200 rpm, and 30 min of electrolysis. The US-EC process improved TOC removal from 41% (EC alone) to 47%, and color removal from 83.5% to 88.2%. The UV₂₅₄ absorbance of raw landfill leachate was 14.78, decreasing to 7.18 and 6.23 after EC and US-EC, respectively. This reduction indicates lower aromaticity and molecular weight, as confirmed by spectral analysis. Additionally, by-products contained high concentrations of oxygen, carbon, and nitrogen, according to EDX results. FTIR analysis showed significant peaks at 3450 cm⁻¹ (OH), 1530 cm⁻¹ and 1400 cm⁻¹ (CC), and 570 cm⁻¹ (CH), supporting the effective removal of organic matter by both EC and US-EC.

CONCLUSION

The combined US-EC process demonstrated improved removal of refractory organic matter in landfill leachate compared to EC alone. Despite a significant increase in energy consumption from 57.8 to 349 kWh kg⁻¹ TOC, the process offers enhanced degradation efficiency and improved environmental performance, indicating its strong potential for advanced leachate treatment applications. © 2025 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.