Development of biofertilisers from calcined bones: production, and physicochemical and ecotoxicological analysis
ABSTRACT The possibility of producing animal bone ash from sources other than cattle, and the determining effect of prolonged calcination, has encouraged investigation into bio-based fertilisers. The aim of this study was to develop and characterise calcined bone ash using different animal sources a...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidade Federal do Ceará
2025-02-01
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| Series: | Revista Ciência Agronômica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902025000100646&lng=en&tlng=en |
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| Summary: | ABSTRACT The possibility of producing animal bone ash from sources other than cattle, and the determining effect of prolonged calcination, has encouraged investigation into bio-based fertilisers. The aim of this study was to develop and characterise calcined bone ash using different animal sources and heat treatments. Femurs from cattle, pigs and sheep were subjected to heat treatments of 2 or 4 hours, and the ash (CBA1, CBA2 and CBA3) was compared to a commercial bone ash of unknown processing (CCBA-Unk). The data analysis included descriptive or inferential statistics with ANOVA and Tukey's post-hoc test or linear regression. Production analysis showed that CBA1 and CBA3 had higher yields than CBA2 after 2 h, while only CBA1 still differed from CBA2 after 4h (p < 0.05). In the physical and chemical analyses, the ash calcined for 4 h presented both a clearer and more uniform granular morphology than did the ash calcined for 2 h and CCBA-Unk, with a high concentration of minerals, reaching twice the levels of phosphorus and calcium compared to CCBA-Unk. In the ecotoxicological analysis with Artemia salina, all the ashes under test were non-toxic, with 4 h CBA1 and 4 h CBA3 proving safer than the other experimental ashes, reaching four times and twice the LC50 of CCBA-Unk, respectively. Bone ash from cattle or sheep bones calcined for 4 h proved to be more promising than from pig bones or when calcined for 2 h for generating nutritional products for acidic soils. |
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| ISSN: | 1806-6690 |