工业水处理 ›› 2025, Vol. 45 ›› Issue (10): 121-129. doi: 10.19965/j.cnki.iwt.2024-0797

• 试验研究 • 上一篇    

锰改性芦苇基生物炭的制备及其催化臭氧氧化效能

罗桂林1(), 罗晋2(), 胡映明3,4, 冯伟莹5, 王俊凯3, 晁婧1   

  1. 1. 宁夏理工学院理学与化学工程学院,宁夏 石嘴山 753000
    2. 北控水务(中国)投资有限公司,北京 100102
    3. 中国环境科学研究院环境污染控制工程技术研究中心,北京 100012
    4. 中国环境科学研究院环境技术工程有限公司,北京 100012
    5. 北京航空航天大学材料科学与工程学院,北京 100083
  • 收稿日期:2025-02-05 出版日期:2025-10-20 发布日期:2025-11-05
  • 通讯作者: 罗晋
  • 作者简介:

    罗桂林(1983— ),硕士,副教授,E-mail:

  • 基金资助:
    宁夏高等学校科学研究项目(NYG2024246); 宁夏自然基金项目(2023AAC03370); 宁夏回族自治区普通本科高校一流本科专业建设点(应用化学)项目; 中央级公益性科研院所基本科研业务费项目(2022YSKY-70)

Preparation of manganese modified reed-based biochar and its catalytic ozonation efficiency

Guilin LUO1(), Jin LUO2(), Yingming HU3,4, Weiying FENG5, Junkai WANG3, Jing CHAO1   

  1. 1. School of Science and Chemical Engineering, Ningxia University of Technology, Shizuishan 753000, China
    2. Beijing Enterprises Water Group (China) Investment Limited, Beijing 100102, China
    3. Research Center of Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
    4. Environmental Technology & Engineering Co. , Ltd. , Chinese Research Academy of Environmental Sciences, Beijing 100012, China
    5. School of Materials Science and Engineering, Beihang University, Beijing 100083, China
  • Received:2025-02-05 Online:2025-10-20 Published:2025-11-05
  • Contact: Jin LUO

摘要:

为探究湿地植物利用,以西北寒旱地区湿地优势植物芦苇为原料制备生物炭,探究其吸附特性及其催化臭氧氧化处理焦化废水生化出水的性能。在生物炭制备过程中通过添加硝酸锰和硝酸铁分别得到Mn、Fe负载型改性生物炭BCMn和BCFe,表征结果表明,相较于原始生物炭(BC),BCMn和BCFe的比表面积和总孔容积显著增加,且BCMn的表现更优。吸附动力学研究表明,BC、BCMn、BCFe对苯酚的吸附均更为符合准二级反应动力学方程,且BCMn的平衡吸附量最大,同时碘吸附值测定结果也证实BCMn具有最优的吸附性能。在此基础上采用BCMn为催化剂催化臭氧氧化处理焦化废水生化出水,COD去除率达66.8%,是单独臭氧氧化去除工艺的1.6倍,最终出水COD为83 mg/L,低于《炼焦化学工业污染物排放标准》(GB 16171—2012)所规定的COD排放限值(100 mg/L)。三维荧光光谱分析表明,BCMn催化臭氧氧化工艺对于焦化废水中总荧光物质的去除率为87.2%。稳定性实验表明,BCMn重复使用3次后对COD的去除率仍保持60.00%,且锰溶出质量浓度(≤0.074 mg/L)远低于《城镇污水处理厂污染物排放标准》(GB 18918—2002)总锰限值(2.0 mg/L),并满足《地表水环境质量标准》(GB 3838—2002)Ⅲ类水对总锰的排放要求(≤0.1 mg/L)。

关键词: 催化臭氧氧化, 芦苇基生物炭, 苯酚, 金属负载改性

Abstract:

To explore the utilization of wetland plants, biochar was prepared from Phragmites australis, a dominant wetland plant in the cold and arid regions of Northwest China, and its adsorption performance and catalytic ozonation performance for the treatment of biochemical effluent from coking wastewater were investigated. During the biochar preparation process, manganese nitrate and iron nitrate were added to obtain Mn- and Fe-loaded modified biochars of BCMn and BCFe, respectively. Characterization results showed that the specific surface area and total pore volume of BCMn and BCFe were significantly increased compared with the original biochar(BC), and BCMn performed better. Adsorption kinetics studies indicated that the adsorption of phenol by BC, BCMn, and BCFe were all conformed to the pseudo-second-order reaction kinetic equation, and BCMn had the largest equilibrium adsorption capacity. The iodine adsorption value determination results also confirmed that BCMn had the best adsorption performance. On this basis, BCMn was used as the catalyst for catalytic ozonation to treat the biochemical effluent from coking wastewater. The COD removal rate reached 66.8%, which was 1.6 times that of the single ozonation process. The final effluent COD was 83 mg/L, which was lower than the COD discharge limit (100 mg/L) stipulated in the Emission Standard of Pollutants for Coking Chemical Industry (GB 16171—2012). Three-dimensional fluorescence spectroscopy analysis showed that the removal rate of total fluorescent substances in coking wastewater by BCMn-catalyzed ozonation was 87.2%. The stability experiment showed that after reuse of BCMn three times, the COD removal rate still remained at 60.00%, and the manganese leaching mass concentration (≤0.074 mg/L) was much lower than the total manganese limit (2.0 mg/L) in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918—2002). After treatment, the wastewater met the discharge requirements (≤0.1 mg/L) for total manganese of Class Ⅲ water in the Environmental Quality Standards for Surface water (GB 3838—2002).

Key words: catalytic ozone oxidation, reed-based biochar, phenol, metal loading modification

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