无机材料学报 ›› 2023, Vol. 38 ›› Issue (2): 205-212.DOI: 10.15541/jim20220432
于业帆1(), 徐玲2, 倪忠斌1, 施冬健1, 陈明清1(
)
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:
YU Yefan1(), XU Ling2, NI Zhongbing1, SHI Dongjian1, CHEN Mingqing1(
)
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.cnAbout author:
YU Yefan (1997-), male, Master candidate. E-mail: 6190606052@stu.jiangnan.edu.cn
Supported by:
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。
中图分类号:
于业帆, 徐玲, 倪忠斌, 施冬健, 陈明清. 普鲁士蓝/生物炭材料的制备及其氨氮吸附机理[J]. 无机材料学报, 2023, 38(2): 205-212.
YU Yefan, XU Ling, NI Zhongbing, SHI Dongjian, CHEN Mingqing. Prussian Blue Modified Biochar: Preparation and Adsorption of Ammonia Nitrogen from Sewage[J]. Journal of Inorganic Materials, 2023, 38(2): 205-212.
图1 BC700 (a)和BC700-PB (b)的SEM照片, BC700 (c)和BC700-PB (d)的TEM照片
Fig. 1 SEM images of BC700 (a) and BC700-PB (b), and TEM images of BC700 (c) and BC700-PB (d)
图4 BC700和BC700-PB的XPS全谱(a), BC700(b, d)和BC700-PB (c, e)的C1s(b, c)与O1(d, e)与BC700-PB的N1s(f)XPS谱图
Fig. 4 Full XPS spectra (a) of BC700 and BC700-PB, core-level XPS spectra of the elemental C1s (b, c) and O1s (d, e) of BC700 (b, d) and BC700-PB (c, e), and N1s (f) of BC700-PB Colorful figures are available on website
图5 BC700和BC700-PB添加量对吸附氨氮效果的影响(a)(pH 8, C0=50 mg/L, t=60 min), 和体系pH(b)(dosage=5 g/L, C0=50 mg/L, t=60 min)、在不同共存离子(50 mg/L)中污染物初始浓度(c)(dosage=5 g/L, pH 8, t=60 min)以及反应时间(d)(dosage=5 g/L, pH 8, C0=50 mg/L)对BC700-PB吸附氨氮效果的影响
Fig. 5 Effect of dosage on the removal of NH3-N by of BC700 and BC700-PB (pH 8, C0=50 mg/L, t=60 min) (a), effects of pH (dosage=5 g/L, C0=50 mg/L, t=60 min) (b), initial concentration and coexisting ions (C0=50 mg/L, dosage=5 g/L, pH 8, t=60 min) (c), and reaction time(dosage=5 g/L, pH 8, C0=50 mg/L) (d) on the removal of NH3-N by BC700-PB
图7 BC700-PB对氨氮的吸附热力学的Langmuir模型(a)和Freundlich模型(b)拟合; BC700-PB对氨氮的吸附动力学的拟一级动力学模型(c)和拟二级动力学模型(d)拟合
Fig. 7 Langmuir (a) and Freundlich models (b) of NH3-N on BC700-PB, and pseudo-first-order kinetic (c) and pseudo-second-order kinetic (d) models of NH3-N on BC700-PB
图9 不同吸附剂、添加剂对氨氮和HA双组分污水的吸附效果的影响(pH 2, dosage=5 g/L, C0=50 mg/L) (a)和BC700-PB体系中添加了DMPO的EPR谱图(b)
Fig. 9 Effects of adsorbents and additive on the removal efficiency for mixed solution of NH3-N and HA(pH 2, dosage=5 g/L, C0=50 mg/L) (a), and EPR spectra of DMPO-OH (b) adducts in the systems of BC700-PB
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