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Phosphate Removal and Recovery with Seed Crystals in Low Concentrated Phosphate Wastewater

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Abstract:

The phosphate removal and recovery from lower concentrated phosphate wastewater with the quartz sand, ceramsite, blast furnace slag and steel slag as seed crystals were investigated. The results showed that the steel slag performed a better phosphate removal performance than the other threes. The phosphate crystallization occurred under the reaction conditions of Ca/P 2.0, pH 9.0, phosphate concentration 10 mg/L and reaction time 12h. The steel slag could be employed as an effective seed crystal, of which the phosphate concentration decreased drastically in 12h and almost had been removed completely in 48h. The XRD analysis showed that the main crystallization products were hydroxyapatite (HAP) and the crystallinity increased with the reaction time.

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Periodical:

Advanced Materials Research (Volumes 374-377)

Pages:

865-868

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.374-377.865

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Online since:

October 2011

Authors:

Li Ping Qiu, Guang Wei Wang, Shou Bin Zhang, Tao Yu

Keywords:

Crystallization, Hydroxyapatite (HAP), Phosphate Removal And Recovery, Seed Crystal Material, Steel Slag

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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