4.4 Article

Aluminum- and iron-engineered biochar from sugarcane filter cake as phosphorus adsorbents and fertilizers

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SCIENCEASIA
卷 47, 期 2, 页码 220-227

出版社

SCIENCE SOCIETY THAILAND
DOI: 10.2306/scienceasia1513-1874.2021.032

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metal-engineered biochar; P sorption; sandy soil

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  1. Kasetsart University Research and Development Institute (KURDI), Bangkok, Thailand [18.58]

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The study found that aluminum biochar has a higher phosphorus retention capacity, while both aluminum and iron biochar can release sufficient available phosphorus into the sand sample, indicating their potential in providing phosphorus availability.
Reclamation of phosphorus (P) from wastewater using metal-engineered biochar and its reuses as phosphate fertilizers could be an eco-friendly and effective technology for the sustainability of environmental and agricultural systems. Herein, we studied the P removal capacity of filter cake-engineered biochar loaded with Al and Fe and examined their available P release capability into the sand sample. The Al-biochar (63.7 mg/g) had a higher P retention capacity than the Fe-biochar (33.2 mg/g). Over 45 days of the incubation, Al- and Fe-biochar incorporation steadily or increasingly released adequate concentrations of available P to the sand sample. Furthermore, a considerable P fraction (99.4-99.8% of the total P) remained in all metal-biochar samples, suggesting that the metal biochar could be a long-term source of the available P pool. This study highlighted the potential use of Al- and Fe-biochar for providing available P availability in sandy soils.

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