Chemical volatiles present in cotton gin trash: A by-product of cotton processing

Cotton gin trash (CGT), a waste product of cotton gins, make up about 10% of each bale of cotton bolls ginned. The current study investigates high value volatile compounds in CGT to add value to this by-product. The volatile compounds in CGT and different parts of the cotton plant were extracted usi...

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Bibliographic Details
Published in:PloS one 2019-09, Vol.14 (9), p.e0222146
Main Authors: Egbuta, Mary A, McIntosh, Shane, Waters, Daniel L E, Vancov, Tony, Liu, Lei
Format: Article
Language:English
Subjects:
Alcohols
Apoptosis
Backup software
Biology and Life Sciences
Byproducts
Capital gains tax
Caryophyllene
Caryophyllene oxide
Chemicals
Chromatography
Cotton
Cotton Fiber
Cotton ginning
Cotton gins
Diagnostic imaging
Distillation
Ethanol
Flame ionization
Gas chromatography
Gas Chromatography-Mass Spectrometry
Gin
Gossypium - chemistry
Humulene
Identification methods
Industrial Waste - analysis
Leaves
Magnetic resonance
Magnetic Resonance Spectroscopy
Mass spectrometry
Mass spectroscopy
Monoterpenoids
NMR
Nuclear magnetic resonance
Nuclear magnetic resonance spectroscopy
Oils & fats
Organic chemistry
Physical Sciences
Phytochemicals
Plant extracts
Plant Extracts - chemistry
Plant Extracts - isolation & purification
Plant sciences
Research and analysis methods
Seeds
Sesquiterpenes
Sesquiterpenoids
Spectroscopy
Strategic planning (Business)
Terpenes
Terpenes - chemistry
Terpenes - isolation & purification
Textile Industry
Volatile compounds
Volatile organic compounds
Volatiles
α-Pinene
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Summary:Cotton gin trash (CGT), a waste product of cotton gins, make up about 10% of each bale of cotton bolls ginned. The current study investigates high value volatile compounds in CGT to add value to this by-product. The volatile compounds in CGT and different parts of the cotton plant were extracted using various methods, identified by gas chromatography-mass spectrometry (GC-MS) or nuclear magnetic resonance (NMR) spectroscopy, and then quantified by gas chromatography-flame ionisation detection (GC-FID) against available standards. Terpenoids including monoterpenoids and sesquiterpenoids were found to be the most abundant, making up 64.66% (area under peak) of total volatiles extracted by hydro-distillation. The major extractable terpenoids in CGT were α-pinene (13.69-23.05 μg/g), β-caryophyllene (3.99-74.32 μg/g), α-humulene (2.00-25.71 μg/g), caryophyllene oxide (41.50-102.08 μg/g) and β-bisabolol (40.05-137.32 μg/g). Recoveries varied between different extraction methods. The terpenoids were found to be more abundant in the calyx (659.12 μg/g) and leaves (627.72 μg/g) than in stalks (112.97 μg/g) and stems (24.24 μg/g) of the cotton plant, indicating the possible biological origin of CGT volatiles. This study is the first to identify and quantify the different terpenoids present in CGT and significantly, β-bisabolol, an abundant compound (sesquiterpene alcohol) which may have valuable biological prospects. These findings therefore contribute to identifying alternative management strategies and uses of CGT.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0222146