Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)

XU Zuoxing; QIAN Gongming; LIU Lulu; LIU Wei; CAI Xianyan; FENG Junyan

doi:10.13779/j.cnki.issn1001-0076.2020.01.006

2020 Vol. 40, No. 1

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XU Zuoxing, QIAN Gongming, LIU Lulu, LIU Wei, CAI Xianyan, FENG Junyan. Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)[J]. Conservation and Utilization of Mineral Resources, 2020, 40(1): 37-41. doi: 10.13779/j.cnki.issn1001-0076.2020.01.006

Citation:

XU Zuoxing, QIAN Gongming, LIU Lulu, LIU Wei, CAI Xianyan, FENG Junyan. Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)[J]. Conservation and Utilization of Mineral Resources, 2020, 40(1): 37-41. doi: 10.13779/j.cnki.issn1001-0076.2020.01.006

Study on Mechanism of Lead Ion Removed by Hydroxyapatite (HAP)

1.
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China
2.
Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan 430081, China

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Corresponding author: QIAN Gongming, qiangongming@wust.edu.cn

Received Date: 31 August 2019

Publish Date: 25 February 2020

Abstract

Abstract

Lead ions were removed by using HAP prepared by chemical precipitation method. Morphology of Hydroxyapatite (HAP) was observed by SEM, EDS and XRD. The results showed that the reaction mechanism of lead removal was mainly precipitation and ion exchange at pH=3, and precipitation and hydrolysis at pH=5. The removal rate of lead was positively correlated with pH value and reaction temperature of the solution, negatively correlated with the initial lead ion concentration of the solution, and the reaction process was a complicated multistage reaction. When pH=4, the removal rate of lead ions is close to 99%, while the lead ions in aqueous solution drop below the prescribed emission standard (1 mg / L).
- HAP /
- lead ion /
- mechanism

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References

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