Phosphorus Adsorption Properties in Waste Water of La−modified Synthetic Zeolite from Coal Fly Ash

CHEN Beibei; TANG Yuan; HE Dongsheng; ZHANG Kecheng; TIAN Chengtao; LI Zhili; QIN Fang

doi:10.13779/j.cnki.issn1001-0076.2023.03.018

2023 Vol. 43, No. 3

Article Contents

Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(3): 152-159

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CHEN Beibei, TANG Yuan, HE Dongsheng, ZHANG Kecheng, TIAN Chengtao, LI Zhili, QIN Fang. Phosphorus Adsorption Properties in Waste Water of La−modified Synthetic Zeolite from Coal Fly Ash[J]. Conservation and Utilization of Mineral Resources, 2023, 43(3): 152-159. doi: 10.13779/j.cnki.issn1001-0076.2023.03.018

Citation:

CHEN Beibei, TANG Yuan, HE Dongsheng, ZHANG Kecheng, TIAN Chengtao, LI Zhili, QIN Fang. Phosphorus Adsorption Properties in Waste Water of La−modified Synthetic Zeolite from Coal Fly Ash[J]. Conservation and Utilization of Mineral Resources, 2023, 43(3): 152-159. doi: 10.13779/j.cnki.issn1001-0076.2023.03.018

Phosphorus Adsorption Properties in Waste Water of La−modified Synthetic Zeolite from Coal Fly Ash

1.
School of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan 430073, China
2.
Hubei Three Gorges Laboratory, Yichang 443007, China
3.
Hubei Sanning Chemical Industry Co., Ltd., Yichang 443200, China

More Information

Corresponding author: TANG Yuan, yuan.tang@wit.edu.cn

Received Date: 21 May 2023

Publish Date: 15 June 2023

Abstract

Abstract

The coal fly ash sample was used to synthesize the zeolite adsorbent, and then the effect of lanthanum modification on phosphorus adsorption of the synthetic zeolite and its mechanism were investigated to help to reduce phosphorus pollution in water. The physicochemical properties of the synthetic zeolite before and after La-modification were systematically characterized by using various analytical techniques. Specifically, the differences of major components, mineral composition and structures before and after modification were explored. Furthermore, the phosphorus removal mechanism was preliminarily discussed from the perspectives of isothermal adsorption experiments, adsorption kinetics experiments and adsorption thermodynamics calculations. The results indicated that the phosphorus removal rate of the La-modified synthetic zeolite reached 94.2% in the simulated wastewater system, which was nearly 65 percentage higher than that without modification. Moreover, the lanthanum ions were physically loaded on the surface of the synthetic zeolite after modification, which enhanced the phosphorus adsorption. The phosphorus adsorption process conforms to the Langmuir adsorption isotherm model and the Elovich equation, and the adsorption happens spontaneously. The study has provided a theoretical and practical basis for promoting the utilization of coal fly ash and eliminating the phosphorus pollutants in water.
- coal fly ash /
- lanthanum chloride modification /
- synthetic zeolite /
- phosphorus removal /
- adsorption properties

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References

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