RT Journal Article
T1 Solubilization of cuprous oxide in water using biosurfactant extracts from corn steep liquor: a comparative study
A1 López Prieto, Alejandro
A1 Moldes Menduiña, Ana Belén
A1 Cruz Freire, José Manuel
A1 Pérez Cid, Benita
K1 3303 Ingeniería y Tecnología Químicas
K1 3309 Tecnología de Los Alimentos
K1 3309.13 Conservación de Alimentos
AB In this work the chemical characterization (elemental analysis and the content of phospholipids) and surface-active properties of two biosurfactants (BS) extracted with both chloroform or ethyl acetate from corn steep liquor were compared. 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 g/L of BS2 with a contact time of 19.86 min and using a concentration of Cu-Ox of 1.96 g/L. Thus, the BS2 extract could have a 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.
PB Scientific Reports
SN 20452322
YR 2022
FD 2022-02-17
LK http://hdl.handle.net/11093/3751
UL http://hdl.handle.net/11093/3751
LA eng
NO Scientific Reports, 12, 2695 (2022)
NO Ministerio de Economía y Competitividad | Ref. RTI2018-093610-B-100
DS Investigo
RD 15-oct-2024