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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 997High Efficient Treatment of Coal Gasification...

High Efficient Treatment of Coal Gasification Wastewater by Precipitation and Photocatalysis Process

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Abstract:

This study was conducted to investigate a novel treatment method for coal gasification wastewater (CGWW) by combining magnesium ammonium phosphate (MAP) precipitation and photocatalysis processes. The optimized conditions for MAP process were explored, and the removal efficiency of NH₄-N by the MAP treatment can exceed 85% at the mole ratio of 1.2~1.4 MgCl₂ and 0.9 Na₂HPO₄ to NH₄⁺ as precipitators, and the pH value at 9.0~9.5. The MAP precipitates are an useful slow-available-fertilizer. After the photocatalysis treatment of 5hrs, the total removal efficiency for NH₄-N, COD, Phenol and CN⁻ exceeds 99%, 95%,90% and 90%,respectively.This technology with low cost and high efficiency has big potential to treat CGWW practically on a large scale.

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Periodical:

Advanced Materials Research (Volume 997)

Pages:

749-753

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.997.749

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Online since:

August 2014

Authors:

Mao Xiang Jing*, Chong Han, Xiang Qian Shen

Keywords:

Coal Gasification Wastewater, MAP Precipitation, NH₄-N, Photocatalysis

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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