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Neutralization of Cotton Seeds After Chemical Delinting

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Douglas Pelegrini Vaz Tostes
Douglas Pelegrini Vaz Tostes
Douglas Pelegrini Vaz Tostes
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Heloisa Oliveira dos Santos at Universidade Federal de Lavras (UFLA)
Heloisa Oliveira dos Santos
Jaqueline Pereira Januário
Jaqueline Pereira Januário
Jaqueline Pereira Januário
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Juliana Xisto Silva
Juliana Xisto Silva
Juliana Xisto Silva
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Abstract

Using sulfuric acid in the chemical delinting of cotton seeds is necessary to degrade the short fibers that adhere to the seed tegument after ginning. Neutralization with a basic solution is essential to stop the acid reaction after this process and ensure seed quality. Thus, the objective of this study was to evaluate the neutralization of cotton seeds and the waste generated during chemical delinting with concentrated sulfuric acid by using different basic compounds, defining the total amount of those necessary to neutralize the residue without damages to seed quality. For neutralization, three basic solutions were used at a concentration of 10% (w/V): sodium hydroxide (NaOH), sodium carbonate (Na2CO3), and calcium hydroxide [Ca(OH)2]. Analyses of the pH of the solutions during the delinting and of the process residual liquid were performed. The pH of the seed exudate was also analyzed. Lastly, the physiological quality of the seeds was evaluated by first and last germination count tests. We concluded that the use of calcium hydroxide solution [7.2% (w/V)] is efficient for neutralization following the chemical delinting of cotton seeds with concentrated sulfuric acid. Neutralization after delinting is essential to ensure the quality of cotton seeds. For the disposal or reuse of effluent generated during the delinting process, it is necessary to neutralize pH by using calcium hydroxide.
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https://doi.org/10.1007/s11270-022-06019-4
Neutralization ofCotton Seeds After Chemical Delinting
DouglasPelegriniVazTostes · HeloisaOliveiradosSantos · JaquelinePereiraJanuário ·
JulianaXistoSilva· MaríliaMendesdosSantosGuaraldo · GeovaniMarquesLaurindo·
WilsonVicenteSouzaPereira
Received: 20 July 2022 / Accepted: 12 December 2022
© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022
Abstract Using sulfuric acid in the chemical delint-
ing of cotton seeds is necessary to degrade the short
fibers that adhere to the seed tegument after ginning.
Neutralization with a basic solution is essential to
stop the acid reaction after this process and ensure
seed quality. Thus, the objective of this study was
to evaluate the neutralization of cotton seeds and
the waste generated during chemical delinting with
concentrated sulfuric acid by using different basic
compounds, defining the total amount of those nec-
essary to neutralize the residue without damages to
seed quality. For neutralization, three basic solutions
were used at a concentration of 10% (w/V): sodium
hydroxide (NaOH), sodium carbonate (Na2CO3), and
calcium hydroxide [Ca(OH)2]. Analyses of the pH of
the solutions during the delinting and of the process
residual liquid were performed. The pH of the seed
exudate was also analyzed. Lastly, the physiological
quality of the seeds was evaluated by first and last
germination count tests. We concluded that the use of
calcium hydroxide solution [7.2% (w/V)] is efficient
for neutralization following the chemical delinting of
cotton seeds with concentrated sulfuric acid. Neutral-
ization after delinting is essential to ensure the quality
of cotton seeds. For the disposal or reuse of effluent
generated during the delinting process, it is necessary
to neutralize pH by using calcium hydroxide.
Keywords Gossypium L· Sulfuric acid· Basic
solutions· pH· Seed quality
1 Introduction
The technological improvements applied over cotton
production are the motive for Brazilian prominence
on cotton production. Among technologies, we can
cite those on crop management and nutrition, pest and
disease control, and biotechnology. Seed quality is of
highlighted importance on this matter, as the higher
this characteristic is, the higher will be the produc-
tion and profit (Alane & Pandolfi, 2019; Buainain
& Batalha, 2007; Freire et al., 2017; Melo-Filho &
D.P.V.Tostes· H.O.dosSantos(*)· J.P.Januário·
J.X.Silva· M.M.dosSantosGuaraldo· G.M.Laurindo·
W.V.S.Pereira
Setor de Sementes, Universidade Federal de Lavras, CEP
Code, Caixa Postal 3037, Campus Universitário, Lavras,
MinasGerais37200-900, Brazil
e-mail: heloisa.osantos@ufla.br
D. P. V. Tostes
e-mail: douglaspelegrini@hotmail.com
J. P. Januário
e-mail: jaquelinejanuario@ufla.br
J. X. Silva
e-mail: julianaxisto@outlook.com
M. M. dosSantosGuaraldo
e-mail: mah_guaraldo@hotmail.com
G. M. Laurindo
e-mail: geovanimarques@outlook.com
W. V. S. Pereira
e-mail: wvicentesp@gmail.com
/ Published online: 24 December 2022
Water Air Soil Pollut (2023) 234:16
Content courtesy of Springer Nature, terms of use apply. Rights reserved.
ResearchGate has not been able to resolve any citations for this publication.
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