Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/120180
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Type: | Journal article |
Title: | Optimisation of phosphate loading on graphene oxide-Fe(iii) composites-possibilities for engineering slow release fertilisers |
Author: | Andelkovic, I.B. Kabiri, S. Da Silva, R. Tavakkoli, E. Kirby, J.K. Losic, D. Mclaughlin, M.J. |
Citation: | New Journal of Chemistry: a journal for new directions in chemistry, 2019; 43(22):8580-8589 |
Publisher: | Royal Society of Chemistry |
Issue Date: | 2019 |
ISSN: | 1144-0546 1369-9261 |
Statement of Responsibility: | Ivan B. Andelkovic, Shervin Kabiri, Rodrigo C. da Silva, Ehsan Tavakkoli, Jason K. Kirby, Dusan Losic and Michael J. McLaughlin |
Abstract: | Current commercially available phosphorus (P) fertilisers, which are highly soluble salts, are susceptible to surface runoff to waterways, and leaching to groundwaters where soils are light/medium textured. Here, we report the synthesis of a graphene oxide (GO)/iron (GO–Fe) composite, a promising carrier for loading P. The GO–Fe carriers loaded with P acted as slow release fertilisers with tunable loading/release properties. The amount of P loaded onto the GO–Fe composite was 15%, similar to commercial products. Investigation of the morphology and spectroscopic and chemical analysis revealed a complex loading mechanism of Fe onto GO. Iron, as an active center for P sorption, could interact with the oxygen functional groups at the edge of GO sheets as well as the π-electron system of the aromatic part of GO. Column perfusion studies, visualisation of P diffusion in soils and chemical analysis of soils after diffusion showed the composites to have slow-release properties. Pot experiments using wheat and our composites resulted in the same yield as using highly soluble commercial fertiliser. |
Rights: | This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2019 |
DOI: | 10.1039/c9nj01641d |
Grant ID: | http://purl.org/au-research/grants/arc/DP150101760 http://purl.org/au-research/grants/arc/IH150100003 |
Published version: | http://dx.doi.org/10.1039/c9nj01641d |
Appears in Collections: | ARC Research Hub for Graphene Enabled Industry Transformation publications Aurora harvest 8 Chemical Engineering publications |
Files in This Item:
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hdl_120180.pdf | Accepted version | 691 kB | Adobe PDF | View/Open |
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