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The phospholipids content for the BS extracted with chloroform (BS1) was considerably higher (8.15%) than that obtained for the BS extracted with ethyl acetate (BS2), 0.11%. When comparing the FTIR spectra of the two BS studied in this work with the spectrum of the commercial surfactant lecithin, a greater similarity (75%) was observed with the spectrum of the BS1. The biosurfactant extract (BS2) provided the most favorable conditions for the solubilization of cuprous oxide (Cu-Ox) in water (12.54% of copper dissolved), in comparison with BS1. The results achieved were considerably better than those obtained with chemical surfactants (Tween 80, SDS and CTAB) on solubilizing Cu-Ox, resulting in the latter cases on percentages of Cu dissolved always lower than 0.21%. In addition, a factorial design was performed obtaining the optimum conditions to solubilize Cu-Ox, where the maximum water solubility of Cu-Ox (13.17%) was achieved using 3.93\u00a0g\/L of BS2 with a contact time of 19.86\u00a0min and using a concentration of Cu-Ox of 1.96\u00a0g\/L. Thus, the BS2 extract could have\u00a0a promising future as solubilizing agent in the formulation of more sustainable Cu-Ox based pesticides. Moreover, it was confirmed that the presence of phospholipids prevents the solubilization of copper-based pesticides in water.<\/jats:p>","DOI":"10.1038\/s41598-022-06386-2","type":"journal-article","created":{"date-parts":[[2022,2,17]],"date-time":"2022-02-17T11:02:53Z","timestamp":1645095773000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Solubilization of cuprous oxide in water using biosurfactant extracts from corn steep liquor: a comparative study"],"prefix":"10.1038","volume":"12","author":[{"given":"A.","family":"L\u00f3pez-Prieto","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A. B.","family":"Moldes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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