Next Article in Journal
COVID-19 and the Environment, Review and Analysis
Previous Article in Journal
Sustainability Assessment of Traditional Agroecosystems in the High Region of Yaonáhuac, Puebla, Mexico
Article

Modification of Hardwood Derived Biochar to Improve Phosphorus Adsorption

1
School of Engineering and Built Environment, Griffith University, Nathan, QLD 4111, Australia
2
School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
3
Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia
*
Author to whom correspondence should be addressed.
Academic Editors: Nelson Belzile and Wen-tien Tsai
Received: 10 February 2021 / Revised: 29 April 2021 / Accepted: 2 May 2021 / Published: 6 May 2021
(This article belongs to the Special Issue Restorative Agriculture)
The excessive application of phosphorus in agricultural lands leads to serious environmental issues. Efficient application is beneficial from an economic and environmental perspectives. Biochar can be used as a carrier for slow release of phosphate. However, its adsorption capacity is limited. In this work, biochar was prepared at different pyrolysis temperatures (350–550 °C). The biochar prepared at 550 °C had the highest adsorption capacity and was selected for modification by magnesium impregnation. Magnesium modification enhanced the adsorption capacity by 34% to a theoretical max adsorption capacity of 463.5 mg·g−1. The adsorbed phosphate can be desorbed. The desorption was bi-phasic with fast- and slow-release fractions. The distribution of the phosphate fractions was pH dependent with slow release being most prominent in neutral conditions. Mg modified biochar can be used to recover phosphate and then used as a carrier for slow release of phosphate. The bi-phasic desorption behaviour is useful as the fast release fraction can provide the immediate phosphate needed during plant establishment, while the slow-release fraction maintains steady supply over extended periods. View Full-Text
Keywords: phosphorus recovery; adsorption; biochar; modification; Mg modified biochar phosphorus recovery; adsorption; biochar; modification; Mg modified biochar
Show Figures

Figure 1

MDPI and ACS Style

Arbelaez Breton, L.; Mahdi, Z.; Pratt, C.; El Hanandeh, A. Modification of Hardwood Derived Biochar to Improve Phosphorus Adsorption. Environments 2021, 8, 41. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8050041

AMA Style

Arbelaez Breton L, Mahdi Z, Pratt C, El Hanandeh A. Modification of Hardwood Derived Biochar to Improve Phosphorus Adsorption. Environments. 2021; 8(5):41. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8050041

Chicago/Turabian Style

Arbelaez Breton, Laura, Zainab Mahdi, Chris Pratt, and Ali El Hanandeh. 2021. "Modification of Hardwood Derived Biochar to Improve Phosphorus Adsorption" Environments 8, no. 5: 41. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8050041

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop