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Int. J. Environ. Res. Public Health 2015, 12(6), 6788-6800; doi:10.3390/ijerph120606788

Effects of Varying Particle Sizes and Different Types of LDH-Modified Anthracite in Simulated Test Columns for Phosphorous Removal

School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
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Academic Editors: Rao Bhamidiammarri and Kiran Tota-Maharaj
Received: 20 April 2015 / Revised: 24 May 2015 / Accepted: 10 June 2015 / Published: 16 June 2015
(This article belongs to the Special Issue Environmental Systems Engineering)
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Abstract

A comparative study was carried out for the removal of phosphorus in simulated unplanted vertical-flow constructed wetlands with different layered double hydroxide (LDHs) coated anthracite substrates. Three particle sizes of anthracites were selected and modified separately with nine kinds of LDH coating. The simulated substrates test columns loaded with the original and modified anthracites were constructed to treat the contaminated water. For the medium and large particle size modified anthracite substrates, the purification effects of total phosphorus, total dissolved phosphorus and phosphate were improved by various degrees, and the purification effect of the medium particle size anthracite is better than that of the large size one. The medium size anthracite modified by ZnCo-LDHs had optimal performance with average removal efficiencies of total phosphorus, total dissolved phosphorus and phosphate reaching 95%, 95% and 98%, respectively. The maximum adsorption capacity on ZnCo-LDHs and ZnAl-LDHs modified medium sizes anthracites were 65.79 (mg/kg) and 48.78 (mg/kg), respectively. In comparison, the small size anthracite is not suitable for LDHs modification. View Full-Text
Keywords: LDHs; coating modification; anthracite substrate; phosphorous removal; sewage treatment LDHs; coating modification; anthracite substrate; phosphorous removal; sewage treatment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, X.; Chen, Q.; Guo, L.; Huang, H.; Ruan, C. Effects of Varying Particle Sizes and Different Types of LDH-Modified Anthracite in Simulated Test Columns for Phosphorous Removal. Int. J. Environ. Res. Public Health 2015, 12, 6788-6800.

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