Preparation and adsorption mechanism of NHFO@pumice for ammonia nitrogen

HUANG Jian; SUN Yunyun; ZHANG Hua; XI Shanshan; WANG Jinhua; ZHANG Jiamei; HE Chunhua; LUO Tao; YU Yunhan

doi:10.13801/j.cnki.fhclxb.20230222.010

Volume 40 Issue 11

Nov. 2023

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HUANG Jian, SUN Yunyun, ZHANG Hua, et al. Preparation and adsorption mechanism of NHFO@pumice for ammonia nitrogen[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6130-6138. doi: 10.13801/j.cnki.fhclxb.20230222.010

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HUANG Jian, SUN Yunyun, ZHANG Hua, et al. Preparation and adsorption mechanism of NHFO@pumice for ammonia nitrogen[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6130-6138. doi: 10.13801/j.cnki.fhclxb.20230222.010

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Preparation and adsorption mechanism of NHFO@pumice for ammonia nitrogen

doi: 10.13801/j.cnki.fhclxb.20230222.010

HUANG Jian^{1, 2, 3},
SUN Yunyun^{1, 2, 3},
ZHANG Hua^{1, 2, 3
,
,},
XI Shanshan^{1, 2, 3},
WANG Jinhua^{1, 2, 3},
ZHANG Jiamei^{1, 2, 3},
HE Chunhua^{1, 2, 3},
LUO Tao^{1, 2, 3},
YU Yunhan^{1, 2}

1.
School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
2.
Anhui Provincial Key Laboratory of Environment Pollution Control and Resource Reuse, Hefei 230601, China
3.
Anhui Research Academy of Ecological Civilization, Hefei 230601, China

Funds: National Key Research and Development Program (2019YFC0408504); Provincial Natural Science Research Project of Higher Education in Anhui Province (KJ2019ZD52; KJ2020A0466; KJ2021A0619); Introduction of Talents and Doctoral Program of Anhui Jianzhu University (2019QDZ64; 2019QDZ60)

Received Date: 2022-11-10
Accepted Date: 2023-02-15
Rev Recd Date: 2022-12-15

Available Online: 2023-02-23

Publish Date: 2023-11-01

Abstract

Abstract

Both pumice and nano hydrous iron oxide (NHFO) are commonly used adsorbents in water treatment. In this study, NHFO was loaded onto pumice by co-precipitation method to explore its adsorption performance and mechanism of ammonia nitrogen. The effects of initial ammonia concentration, initial pH value and co-existing ions (H⁺, Na⁺, K⁺, Mg²⁺) on NHFO@pumice adsorption of ammonia nitrogen were investigated. SEM-EDS and XRD were used to characterize the morphology and structure of NHFO@honeycomb. The results show that the initial concentration of ammonia nitrogen is 20 mg/L and the pH value is around 7. The co-existing ions have an inhibitory effect on the adsorption of ammonia nitrogen, and the inhibitory strength is H⁺>Na⁺>K⁺>Mg²⁺. SEM-EDS, XRD, FTIR and other characterization methods confirmed that NHFO was successfully loaded on the honeycomb, and the adsorption process was consistent with Langmuir adsorption isotherm (R²=0.9886) and quasi second-order kinetic model (R²=0.9969). The mechanism of ammonia nitrogen adsorption mainly includes electrostatic interaction of hydroxyl group and NH₄⁺, ion exchange and pore adsorption. This study provides a theoretical basis for the treatment of ammonia-nitrogen water by adsorption.
- pumice,
- nano hydrous iron oxide,
- adsorption,
- ammonia nitrogen,
- mechanisms
Long Abstrsct
Innovation Points

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References(25)

References

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