无机材料学报 ›› 2023, Vol. 38 ›› Issue (2): 205-212.DOI: 10.15541/jim20220432

• 研究论文 • 上一篇    下一篇

普鲁士蓝/生物炭材料的制备及其氨氮吸附机理

于业帆1(), 徐玲2, 倪忠斌1, 施冬健1, 陈明清1()   

  1. 1.江南大学 化学与材料工程学院, 合成与生物胶体教育部重点实验室, 无锡 214122
    2.杭州市生态环境局 富阳分局, 杭州 311400
  • 收稿日期:2022-07-22 修回日期:2022-10-08 出版日期:2023-02-20 网络出版日期:2022-10-19
  • 通讯作者: 陈明清, 教授. E-mail: mqchen@jiangnan.edu.cn
  • 作者简介:于业帆(1997-), 男, 硕士研究生. E-mail: 6190606052@stu.jiangnan.edu.cn
  • 基金资助:
    国家自然科学基金(21571084)

Prussian Blue Modified Biochar: Preparation and Adsorption of Ammonia Nitrogen from Sewage

YU Yefan1(), XU Ling2, NI Zhongbing1, SHI Dongjian1, CHEN Mingqing1()   

  1. 1. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
    2. Fuyang Branch, Hangzhou Municipal Ecology and Environment Bureau, Hangzhou 311400, China
  • Received:2022-07-22 Revised:2022-10-08 Published:2023-02-20 Online:2022-10-19
  • Contact: CHEN Mingqing, professor. E-mail: mqchen@jiangnan.edu.cn
  • About author:YU Yefan (1997-), male, Master candidate. E-mail: 6190606052@stu.jiangnan.edu.cn
  • Supported by:
    National Natural Science Foundation of China(21571084)

摘要:

以氮、磷污染物导致的水体富营养化问题在我国普遍存在。本研究将普鲁士蓝与改性生物炭相结合, 得到普鲁士蓝/生物炭复合材料。通过多种表征手段研究了复合材料的形貌及结构并通过模拟废水测试了其吸附性能。结果表明, 复合材料在pH 8时达到最佳吸附效果, 氨氮去除率在95%以上, 最大吸附量为24.4 mg/g, 比未改性生物碳提高101.3%。对复合材料吸附机理的研究表明, 复合材料通过普鲁士蓝对氨氮的配位作用对多组分污水中氨氮实现了选择性吸附。此外, 复合材料在外加H2O2溶液的条件下可形成芬顿氧化体系, 能实现同步催化降解有机污染物和促进氨氮的吸附, 因此有望在多组分富营养化污水治理中投入实际应用。

关键词: 生物炭材料, 普鲁士蓝纳米粒子, 氨氮吸附, 芬顿氧化反应

Abstract:

Eutrophication caused by nitrogen, phosphorus and organic pollutants is a common problem which has attracted much attention in China. Ammonia nitrogen, as a main pollutant, should be removed efficiently to avoid the extension of eutrophication. In this research, Prussian Blue (PB), which can not only capture ammonia nitrogen by vacancy in crystal cell but also degrade organic pollutants by Fenton oxidation, was combined with modified biochar to increase efficiency of ammonia nitrogen removal. Several characterization methods were used to investigate the structure and morphologies of the biochar composite. Adsorption capacity of biochar composite material (BC700-PB) was tested by NH4Cl solution. The results show that the maximum adsorption capacity to ammonia nitrogen is 24.4 mg/g and the removal efficiency is over 95% within 60 min under the condition of pH 8, which is 101.3% higher than that of the unmodified biochar. The adsorption mechanism of BC700-PB was investigated with Langmuir model and pseudo-second-order kinetic equation which reveal that the adsorption including physical adsorption by biochar and coordination adsorption by PB. Meanwhile, Fenton oxidation process is conducted by PB nanoparticles in the biochar composite material with existence of H2O2. The biochar composite material could catalyze H2O2 to generate •OH, and achieve degradation of organic pollutants and adsorption of ammonia nitrogen. The PB/biochar composite material can be recycled easily by NaCl solution for several times. In conclusion, the PB/biochar composite is a promising material for eliminating multi-component eutrophication wastewater.

Key words: biochar material, prussian blue nanoparticles, ammonia nitrogen adsorption, Fenton oxidation process

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