Lignin-like matter (I) from rice hull residues and humin-like matter and (II) from rice hull-fecal matter compost yield, upon sulphonation by SO3, the lignosulphonates III and IV, respectively. The solid state IR spectra of I and It are analysed and interpreted based on the functional groups content values obtained for III and IV by solution NMR spectroscopy. IR absorbance values at five selected wavelengths for I and II correlate well with functional groups content values for III and IV according to Beer's law. It is concluded that the sulphonated derivatives, aside from the -SO3H content, reflect well the chemical structure of the parent materials. No side reaction of I or II with SO3, other than C sulphonation, is apparent. The above correlation may be useful for waste management purposes. (c) 2004 Elsevier Ltd. All rights reserved.

An IR study to investigate the structural relationship of lignin-like matter and lignosulphonates obtained from animal-vegetable wastes

MONTONERI, Enzo
2005-01-01

Abstract

Lignin-like matter (I) from rice hull residues and humin-like matter and (II) from rice hull-fecal matter compost yield, upon sulphonation by SO3, the lignosulphonates III and IV, respectively. The solid state IR spectra of I and It are analysed and interpreted based on the functional groups content values obtained for III and IV by solution NMR spectroscopy. IR absorbance values at five selected wavelengths for I and II correlate well with functional groups content values for III and IV according to Beer's law. It is concluded that the sulphonated derivatives, aside from the -SO3H content, reflect well the chemical structure of the parent materials. No side reaction of I or II with SO3, other than C sulphonation, is apparent. The above correlation may be useful for waste management purposes. (c) 2004 Elsevier Ltd. All rights reserved.
2005
25 (2)
161
169
compost; lignin; sulphonation; NMR; IR
E. MONTONERI
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/7363
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