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Research articles

ScienceAsia 47 (2021): 220-227 |doi: 10.2306/scienceasia1513-1874.2021.032

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

Natcha Sornhirana, Jirapat Tuntrachanidaa, Prapapun Malacheya, Patchara Thongtuka, Worachart Wisawapipata,b,*, Surachet Aramraka, Nattaporn Prakongkepc

ABSTRACT:     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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a Department of Soil Science, Faculty of Agriculture, Kasetsart University, Bangkok 10900 Thailand
b Research Network of NANOTEC ? KU on NanoCatalysts and NanoMaterials for Sustainable Energy and Environment, Kasetsart University, Bangkok 10900 Thailand
c Office of Science for Land Development, Land Development Department, Bangkok 10900 Thailand

* Corresponding author, E-mail: worachart.w@ku.th

Received 30 Sep 2020, Accepted 17 Feb 2021