LIUJian,CHENShao-hua,LOUYao-yin,et al.Unveiling Removal Mechanism of Dissolved Organic Matter Molecules by Activated Carbon/Ozone Synergistic System[J].China Water & Wastewater,2025,41(19):46-52.
活性炭/臭氧协同体系对渗滤液中DOM去除机制
- Title:
- Unveiling Removal Mechanism of Dissolved Organic Matter Molecules by Activated Carbon/Ozone Synergistic System
- 关键词:
- 垃圾渗滤液; 溶解性有机物; 活性炭/臭氧; 分子特性; 傅里叶变换离子回旋共振质谱
- Keywords:
- landfill leachate; dissolved organic matter; AC/O3; molecular characteristics; Fourier transformation-ion cyclotron resonance mass spectrometry (FT-ICR MS)
- 摘要:
- 为阐明活性炭/臭氧（AC/O3）协同体系对垃圾渗滤液膜生物反应器（MBR）处理出水中溶解性有机物（DOM）的降解机制，利用傅里叶变换离子回旋共振质谱（FT-ICR MS）对单一AC吸附、单一O3氧化及AC/O3协同体系中分子反应活性的差异进行分析。结果表明，在优化条件（pH= 7.7，温度为50 ℃，O3/COD为2）下，AC/O3协同体系对UV254和DOC的去除率分别达到86.9%和61.7%，显著高于单一AC及单一O3体系。质谱分析结果表明，AC/O3协同体系不仅提高了单一AC及单一O3体系难以去除的高氧高不饱和及酚类化合物（HOHUPC）的降解效果，同时有效抑制了氧化过程中间产物的生成。在循环使用5次后AC介孔体积下降73.2%、缺陷密度（ID/IG值）降低19.4%，导致第5次循环时DOC去除率降至单独臭氧氧化水平。该研究揭示了吸附-催化的协同作用机制，为优化AC/O3协同催化体系提供了重要理论依据。
- Abstract:
- To elucidate the molecular degradation mechanism of dissolved organic matter (DOM) in membrane bioreactor (MBR) effluent from landfill leachate by the activated carbon/ozone (AC/O3) synergistic system, Fourier transformation-ion cyclotron resonance mass spectrometry (FT-ICR MS) was employed to analyze the differences in molecular reactivity among the single AC adsorption, single O3 oxidation, and AC/O3 synergistic systems. Experimental results demonstrated that under optimized conditions (pH 7.7, 50 ℃, O3/COD=2), the removal efficiencies of UV254 and DOC reached 86.9% and 61.7%, respectively, representing a significant improvements compared to the single AC adsorption and single O3 oxidation system. The mass spectrometry analysis results indicated that the AC/O3 synergistic system not only enhanced the degradation of highly oxygenated highly unsaturated and phenolic compounds (HOHUPC), which were difficult to be removed by single AC system and single ozone system. Meanwhile, AC/O3 synergistic system could effectively inhibit the generation of intermediate products of the ozonation process. The AC characterization results showed that the mesopore volume of AC decreased by 73.2% and the defect density (ID/IG value) decreased by 19.4% after the fifth recycling, resulting in the DOC removal rate dropping to the level of ozone treatment alone at the fifth cycle. This study reveals the mechanism of adsorption-catalysis synergism and provides an important theoretical basis for optimizing the AC/O3 synergistic catalytic system.
相似文献/References:
[1]田黎黎,蔡斌,周俊,等.处理垃圾渗滤液的纳滤膜元件损坏诊断及修复[J].中国给水排水,2018,34(21):104.
TIAN Li li,CAI Bin,ZHOU Jun,et al.Damage Diagnosis and Repair of Nanofiltration Membrane Element Treating Leachate[J].China Water & Wastewater,2018,34(19):104.
[2]刘建伟,康心悦,岳鹏,等.城市生活垃圾综合处理厂渗滤液全量化处理工程设计[J].中国给水排水,2020,36(10):70.
[3]高波,张磊,郭修智.UASB+A/O+MBR+两级RO处理垃圾焚烧发电厂渗滤液[J].中国给水排水,2021,37(4):67.
GAO Bo,ZHANG Lei,GUO Xiu-zhi.Process of UASB+A/O+MBR+Two-stage RO for the Treatment of Leachate from Waste Incineration Power Plant[J].China Water & Wastewater,2021,37(19):67.
[4]蒋宝军,刘卓驿,郭昊程,等.TiO2、Cu2O和氧化石墨烯复合氧化垃圾渗滤液效能[J].中国给水排水,2021,37(5):86.
JIANG Bao-jun,LIU Zhuo-yi,GUO Hao-cheng,et al.Combined Oxidation Efficiency of Landfill Leachate by TiO2, Cu2O and Graphene Oxide[J].China Water & Wastewater,2021,37(19):86.
[5]高峻峰,胡晓玲,宋建阳,等.BBR+Fenton氧化+BAF组合工艺处理垃圾渗滤液[J].中国给水排水,2021,37(12):151.
GAO Jun-feng,HU Xiao-ling,SONG Jian-yang,et al.Case Study on Landfill Leachate Treatment by a Combined Process of BBR System, Fenton Oxidation, and BAF[J].China Water & Wastewater,2021,37(19):151.
[6]丁西明,康建邨,闵海华,等.垃圾分类对垃圾渗滤液处理领域的影响分析[J].中国给水排水,2021,37(18):42.
DING Xi-ming,KANG Jian-cun,MIN Hai-hua,et al.Analysis on the Impact of Waste Classification on Waste Leachate Treatment[J].China Water & Wastewater,2021,37(19):42.
[7]赵永志,高严,何文丽,等.不同纳滤膜对垃圾渗滤液结垢离子去除效果分析[J].中国给水排水,2021,37(23):57.
ZHAO Yong-zhi,GAO Yan,HE Wen-li,et al.Effect of Different Nanofiltration Membranes on Removal of Scale-forming Ions from Landfill Leachate[J].China Water & Wastewater,2021,37(19):57.
[8]党康飞,张佳欢,代鑫,等.Fenton+BAF工艺用于生活垃圾渗滤液深度处理改造[J].中国给水排水,2021,37(24):78.
DANG Kang-fei,ZHANG Jia-huan,DAI Xin,et al.Application of Fenton/BAF Process in Reconstruction of Advanced Treatment of Landfill Leachate[J].China Water & Wastewater,2021,37(19):78.
[9]王声东.老港垃圾渗滤液应急项目污泥深度脱水工程实例[J].中国给水排水,2021,37(24):107.
WANG Sheng-dong.A Case of Sludge Deep Dewatering in Laogang Landfill Leachate Emergency Treatment Project[J].China Water & Wastewater,2021,37(19):107.
[10]张华,曹雪枫,黄健,等.钙镁对渗滤液处理中微生物电子传递体系的影响[J].中国给水排水,2022,38(11):25.
ZHANGHua,CAOXue-feng,HUANGJian,et al.Effect of Calcium and Magnesium Ions on Microbial Electron Transport System in Landfill Leachate Treatment[J].China Water & Wastewater,2022,38(19):25.