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  Sustainable leaching process of phosphates from animal bones to alleviate the world phosphate crisis

Du, Q., Zhang, S., Antonietti, M., & Yang, F. (2020). Sustainable leaching process of phosphates from animal bones to alleviate the world phosphate crisis. ACS Sustainable Chemistry & Engineering, 8(26), 9775-9782. doi:10.1021/acssuschemeng.0c02233.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-9677-B Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C854-A
Genre: Journal Article

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 Creators:
Du, Qing1, Author
Zhang, Shuaishuai1, Author
Antonietti, Markus2, Author              
Yang, Fan1, Author              
Affiliations:
1NEAU-MPICI, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3235412              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Free keywords: Animal bones; Artificial humic acid; Phosphorus recovery; Solubilization; Plant growth.
 Abstract: Lack of available phosphorus (P) minerals and their very localized regional distribution threatens world food production. Traditional farming methods that recycle various biological wastes and manure for localized fertilization of farmland are our role model, but come with risks such as hygiene, water toxification and passed-on diseases. Here, we present a bran-new hydrothermal process which turns animal bones of kitchen wastes into secondary P sources for fertilization, showing that this hydrothermal humification (HTH) process under 200 °C for 24 h completely disintegrates chemical structure of the biomass, while the simultaneously in-situ prepared artificial humic acid (A-HA) etches even macroscopic bones. Notably, A-HA can solubilize the insoluble P existing in animal bones partly as directly dissolved phosphorus (DP), accounting for 6.36 % of total phosphorus (TP) in the bone wastes. Characterization methods indicate that oxygen-containing functional groups (i.e., -COOH and phenolic-OH) of A-HA can help to corrode bones, causing Ca5(PO4)3(OH) to be decomposed into a large number of more active P minerals, furthermore, leading to high DP (96.79 mg/L) content and the formation of new P-based species. Pot planting experiments show that the resulting liquids were applied as a fertilizer and lead to a significant promotion of the growth of seedlings.

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Language(s): eng - English
 Dates: 2020-06-082020
 Publication Status: Published in print
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 Identifiers: DOI: 10.1021/acssuschemeng.0c02233
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Title: ACS Sustainable Chemistry & Engineering
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 8 (26) Sequence Number: - Start / End Page: 9775 - 9782 Identifier: ISSN: 2168-0485