Chemical and spectroscopic characterization of water extractable organic matter during vermicomposting of cattle dung

Lv, Baoyi; Xing, Meiyan; Yang, Jian; Qi, Wensheng; Lu, Yongsen

doi:10.1016/j.biortech.2013.01.006

Cited by 116 publications

(38 citation statements)

References 35 publications

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“…The decreasing trend of this ratio indicates a progressive humification of the substrate. Similar results were obtained by Lv et al (2013) when vermicomposting cattle dung. They reported that "the low E 4 /E 6 ratio at the end of the experiment might indicate the high contents of large molecular weight molecules, such as humic-and fulviclike compounds.…”

Section: E 4 /E 6 Ratios Of Dom Samplessupporting

confidence: 85%

CompostingPosidonia oceanicaand Sewage Sludge: Chemical and Spectroscopic Investigation

Provenzano

Carella

Malerba

2015

Compost Science & Utilization

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In this article composting of 40% Posidonia oceanica, 20% ligno-cellulosic residues, and 40% sewage sludge was monitored by retrieving samples every 2 weeks from the composting pile and by characterizing them both by chemical and spectroscopic analysis in Fourier transform infrared spectroscopy and fluorescence spectroscopy in the emission mode and as EEM spectra. Chemical data indicated the occurrence of extended mineralization and stabilization during the process. The decreasing trend of E 4 /E 6 ratios suggested a progressive humification of the substrate. Ratios of peaks of aliphatics to aromatics as a function of composting time showed a decreasing trend due to consumption of aliphatic structures and increase of aromatics during the process. The trend of fluorescence intensity observed on emission spectra showed an increase up until 6 weeks and then a decrease until the end of the process, as a consequence of the decomposition process, which broke down organic macromolecules contained in the fresh substrate followed by the humification process. EEM spectra of all samples produced a peak D in the range 345-355 ex /437-446 em . Samples retrieved at the beginning of the process showed, in addition, a peak B at 280 ex /344 em whose disappearance during the process was consistent with bio-degradation of organic matter. Samples retrieved at the beginning and after 2, 4, 6, 8, 10, and 12 weeks exhibited also a peak C at 255 ex /440 em whose fluorescence intensity trend suggested a progressive humification of the substrates.Correspondence to:

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Section: E 4 /E 6 Ratios Of Dom Samplessupporting

confidence: 85%

CompostingPosidonia oceanicaand Sewage Sludge: Chemical and Spectroscopic Investigation

Provenzano

Carella

Malerba

2015

Compost Science & Utilization

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“…Two peaks (Peak 1 and Peak 2) appeared at the beginning of composting process (Day 14). The Ex/Em wavelength pair of Peak 1 was recorded at 220 to 225/310 to 330 nm, was related to protein‐like substances, and was located in the region of the shorter excitation/emission wavelength (<250/330 nm) (Lv et al, 2013). Peak 2 presented an Ex/Em wavelength pair of 275 to 280/305 to 335 nm, which indicates soluble microbial byproduct–like compounds (Chen et al, 2003).…”

Section: Resultsmentioning

confidence: 99%

Variation in the Humification Degree of Dissolved Organic Matter from Cattle Manure during Composting as Analyzed by Ultraviolet‐Visible and Fluorescence Spectroscopy

et al. 2017

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This study investigated the degree of humification of dissolved organic matter (DOM) during different periods of cattle manure composting using ultraviolet-visible (UV-vis) and fluorescence spectroscopy (emission, synchronous scan, and excitation-emission matrix) and determined which method is more suitable for analysis of the humification degree of DOM. Two composting piles were prepared by mixing manure and corn straw. One pile (Pile A [PA]) contained inoculated exogenous composite agents at a ratio of 2% (v/v), and a pile without the addition of inoculants (PNA) served as the control treatment. The results showed that ultraviolet integrated absorption intensities in the range of 226 to 400 nm and 260 to 280 nm and specific ultraviolet absorbances at 254 and 280 nm of both PA and PNA gradually increased with composting time. Based on the fluorescence regional integration analysis and parallel factor analysis, the humic-like substances became the main components of the DOM after composting. Our study demonstrated that the humification degree of DOM was enhanced during composting and that the inoculation composite agent was beneficial for the humification of DOM at the mesophilic and thermophilic phases of the composting process. Moreover, the results of correlation analysis and principal component analysis demonstrated that the fluorescence spectral parameters evaluated the humification degree of DOM during the whole cattle manure composting process better than the UV-vis spectral parameters.

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“…1. The spectra were interpreted according to published results [29,30]. DOMs derived from WS, MCSW, and CM exhibited the similar spectra.…”

Section: Properties Of Various Domsmentioning

confidence: 99%

Insight into the Modulation of Dissolved Organic Matter on Microbial Remediation of PAH-Contaminated Soils

et al. 2015

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Microorganisms play a key role in degradation of polycyclic aromatic hydrocarbons (PAHs) in environments. Dissolved organic matter (DOM) can enhance microbial degradation of PAHs in soils. However, it is not clear how will the soil microbial community respond to addition of DOM during bioremediation of PAH-contaminated soils. In this study, DOMs derived from various agricultural wastes were applied to remediate the aging PAH-contaminated soils in a 90-day microcosm experiment. Results showed that the addition of DOMs offered a more efficient and persistent elimination of soil PAHs compared to the control which had no DOM addition. PAH removal effects were different among treatments with various DOMs; the addition of DOMs with high proportion of hydrophobic fraction could remove PAHs more efficiently from the soil. Low-molecular-weight (LMW) PAHs were more easily eliminated than that with high-molecularweight (HMW). Addition of DOMs significantly increased abundance of 16S ribosomal RNA (rRNA), pdo1, nah, and C12O genes and obviously changed community compositions of nah and C12O genes in different ways in the PAHcontaminated soil. Phylogenetic analyses of clone libraries exhibited that all of nah sequences and most of C12O sequences were affiliated into Gammaproteobacteria and Betaproteobacteria. These results suggested that external stimuli produced by DOMs could enhance the microbial degradation of PAHs in soils through not only solubilizing PAHs but also altering abundance and composition of indigenous microbial degraders. Our results reinforce the understanding of role of DOMs in mediating degradation of PAHs by microorganims in soils.

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Chemical and spectroscopic characterization of water extractable organic matter during vermicomposting of cattle dung

Cited by 116 publications

References 35 publications

CompostingPosidonia oceanicaand Sewage Sludge: Chemical and Spectroscopic Investigation

CompostingPosidonia oceanicaand Sewage Sludge: Chemical and Spectroscopic Investigation

Variation in the Humification Degree of Dissolved Organic Matter from Cattle Manure during Composting as Analyzed by Ultraviolet‐Visible and Fluorescence Spectroscopy

Insight into the Modulation of Dissolved Organic Matter on Microbial Remediation of PAH-Contaminated Soils

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