How the polarity of the separation column may influence the characterization of compost organic matter by pyrolysis-GC/MS

Dignac, Marie-France; Houot, Sabine; Derenne, Sylvie

doi:10.1016/j.jaap.2005.05.001

Cited by 63 publications

(41 citation statements)

References 61 publications

(93 reference statements)

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“…The inorganic P concentration in HCl fraction were higher than recorded for other studies the P occluded in soil aggregates (Borie and Zumino,1989) were not released due to the lack of ultrasonication. According the high quantity of P remained in residual fraction and the efficient C sequestration capacity in Andisols, we hypothesize that P is found in residual fractions is forming complexes These compounds may have been produced by higher plant litter input as well as microbial activity through degradation of fresh OM (Dignac et al, 2005;Gonzalez-Perez et al, 2007). We suggest according to these results that land use and P fertilization had a bigger effect on labile P and SOM compounds than the recalcitrant ones.…”

Section: Discussionmentioning

confidence: 78%

Fertilizer effects on phosphorus fractions and organic matter in Andisols

Velásquez

Calabi-Floody

Poblete-Grant

et al. 2016

J. Soil Sci. Plant Nutr.

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Andisols are characterized by a high phosphorus (P) fixation capacity, which is a limiting factor for plant production. Continuous application of P fertilizer may result in an accumulation of P associated with soil organic matter (SOM), which further acts to reduce the availability of the added P. The objectives of this study were (1) to evaluate the impact of P fertilizer inputs on the quantities and chemical forms of P, and (2) to investigate relationships between P forms SOM and land use. Topsoil (0-20 cm) and subsoil (20-40 cm) samples were taken from two Andisols series under grassland and arable cropping. Soil P forms were determined using sequential fractionation, while SOM analysis involved a combination of 13 C nuclear magnetic resonance (NMR) spectroscopy and pyrolysis-GC-mass spectrometry. Fertilization increased total P, total organic P, organic carbon, and inorganic P fractions, mainly in arable soils. Labile P was higher in grassland (3% of total P) than in arable soils (1% of total P). A clear effect of fertilization was observed on organic matter compounds measured by pyrolysis in both soil depths. Interestingly, the polysaccharide-derived compounds increased in fertilized soils and lipidderived compounds decreased. Thus fertilization principally affected labile P and labile SOM forms, whereas recalcitrant forms of P and SOM remained unchanged.

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Section: Discussionmentioning

confidence: 78%

Fertilizer effects on phosphorus fractions and organic matter in Andisols

Velásquez

Calabi-Floody

Poblete-Grant

et al. 2016

J. Soil Sci. Plant Nutr.

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“…A polar capillary column was chosen for the GC separation of pyrolysis products, to yield a better separation of polar compounds originating from sugars, proteins and lignins. The less polar compounds, such as alkanes/ alkenes, were not as easily observed on this column (Dignac et al 2006). The temperature program of the GC oven was set with a temperature increase from 30 to 280°C at a rate of 2°C min -1 and then maintained at 280°C for another 15 min.…”

Section: Dom Characterisationmentioning

confidence: 99%

“…Moreover, acids with long chains were often coeluted with other compounds, and their distributions could not be determined accurately by the polar chromatographic column used to separate pyrolysis products. A non-polar column would therefore be better adapted to separating these compounds (Dignac et al 2006). Nevertheless, these fatty acids accompanied with substituted glycerol compounds (LIP1-LIP3) reveal the presence of triglycerides (Decker et al 2000) in DOM from treated effluent.…”

Section: Py-gc-ms Chromatogramsmentioning

confidence: 99%

Characterisation of dissolved organic matter in Parisian urban aquatic systems: predominance of hydrophilic and proteinaceous structures

et al. 2010

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Understanding the nature of organic matter is a necessary first step in assessing contaminant bioavailability and allowing water supply managers to optimise the treatment train in the aim of providing safe and inexpensive drinking water. This study provides further insight into the composition, structure and functional groups of dissolved organic matter (DOM) (both hydrophobic and hydrophilic) from urban aquatic systems by means of various analytical techniques (DAX-8/XAD-4 fractionation, elemental analysis, UV and FTIR spectroscopies, (13)C and (15)N isotopic analysis, size exclusion chromatography and Pyrolysis-GC-MS). The analytical range chosen for this study constitutes a powerful tool in the characterisation of DOM in urban water. The inclusion of information from one technique to the next might not only serve as a support to each one, but also as a complement. The DOM fraction from treated effluent and, more generally, DOM from urban water (i.e. receiving treated effluent) display a strong hydrophilic characteristic [i.e. low humic substance (HS) content, low SUVA], along with a high distribution in molecular weights observed by SEC and low average molecular weight. Due to the origin of this DOM, proteinaceous structures constitute the main compounds, as observed by FTIR and Py-GC-MS. Such characteristics (i.e. heterogeneity, low average molecular weight and diverse functional groups, which make up a total of N) could explain that DOM from treated effluent displayed a strong reactive potential metals pollutants as previously demonstrated

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“…Different equipment can be used to measure the pyrolysis products of biomass. Many researchers have used pyrolysis gas chromatography-mass spectroscopy to study the pyrolysis of cotton [5], pine wood [6], paper [7] and others [8], [9]. Moreover, thermogravimetry coupled with Fourier Transform Infrared Spectroscopy were used successfully to determine products of pyrolysis [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis Characteristics of Phoenix Dactylifera Date Palm Seeds Using Thermo-Gravimetric Analysis (TGA)

Babiker¹,

Aziz²,

Heikal³

et al. 2013

IJESD

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Abstract-Mass losses of Phoenix dactylifera date palm seeds (DPSs) were measured using a thermo-gravimetric analyzer (TGA). Six-milligram-sample of six varieties of DPSs were pyrolyzed in an inert condition (argon atmosphere) with a constant flow rate of 100 ml/min for the entire range of experiments. The experiments were conducted under non-isothermal conditions and at a heating rate of 20°C/min until the furnace wall temperature reached 900°C. The moisture (M), ash (ASH), volatile matter (VM) and fixed carbon (FC) of the selected date seeds were determined by means of proximate analysis. The weight percentages of carbon (C), hydrogen (H), oxygen (O), nitrogen (N), sulfur (S) and atomic ratios (H/C and O/C) were determined through the ultimate analysis. The heating value, bulk and particle density of DPSs were also measured using a bomb calorimeter and ultra-pycnometer, respectively. The yield of the liquids was obtained by subtracting the total gaseous mass from the DTG data. The experiments demonstrated that there were significant differences in physiochemical properties of selected DPSs. The findings also revealed that DPSs contain much volatile compounds. DPSs energy densities were found to be among the high-quality biological feedstocks.Index Terms-Date palm seeds, pyrolysis, TGA, thermal characteristic.

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How the polarity of the separation column may influence the characterization of compost organic matter by pyrolysis-GC/MS

Cited by 63 publications

References 61 publications

Fertilizer effects on phosphorus fractions and organic matter in Andisols

Fertilizer effects on phosphorus fractions and organic matter in Andisols

Characterisation of dissolved organic matter in Parisian urban aquatic systems: predominance of hydrophilic and proteinaceous structures

Pyrolysis Characteristics of Phoenix Dactylifera Date Palm Seeds Using Thermo-Gravimetric Analysis (TGA)

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