Fluorescence-based rapid assessment of the biological stability of landfilled municipal solid waste

Wu, Huayong; Zhou, Zeyu; Zhang, Yaxin; Tan, Chen; Wang, Hong-Tao; Lu, Wenjing

doi:10.1016/j.biortech.2012.01.149

Cited by 54 publications

(7 citation statements)

References 34 publications

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“…In the 3-D fluorescent spectrum, parallel factor (PARAFAC) analysis of the Excitation-Emission Matrix (EEM) spectra has been used to identify fluorescent organic matter in marine environments [ 23 ], red tide algae [ 24 ], vitamins [ 25 ], and green tea [ 26 ] based on fluorescence peak location and intensity. Owing to this ability to identify the complex nature of dissolved organic matter [ 27 , 28 ], PARAFAC analysis has been used to effectively model EEM data sets [ 29 ] and decomposed fluorescence EEMs into independent groups of fluorescent components [ 30 , 31 ]. X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Role and Variation of the Amount and Composition of Glomalin in Soil Properties in Farmland and Adjacent Plantations with Reference to a Primary Forest in North-Eastern China

Wang

et al. 2015

PLoS ONE

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The glycoprotein known as glomalin-related soil protein (GRSP) is abundantly produced on the hyphae and spores of arbuscular mycorrhizal fungi (AMF) in soil and roots. Few studies have focused on its amount, composition and associations with soil properties and possible land-use influences, although the data hints at soil rehabilitation. By choosing a primary forest soil as a non-degraded reference, it is possible to explore whether afforestation can improve degraded farmland soil by altering GRSP. In this paper, close correlations were found between various soil properties (soil organic carbon, nitrogen, pH, electrical conductivity (EC), and bulk density) and the GRSP amount, between various soil properties and GRSP composition (main functional groups, fluorescent substances, and elements). Afforestation on farmland decreased the EC and bulk density (p < 0.05). The primary forest had a 2.35–2.56-fold higher GRSP amount than those in the plantation forest and farmland, and GRSP composition (tryptophan-like and fulvic acid-like fluorescence; functional groups of C–H, C–O, and O–H; elements of Al, O, Si, C, Ca, and N) in primary forest differed from those in plantation forest and farmland (p < 0.05). However, no evident differences in GRSP amount and composition were observed between the farmland and the plantation forest. Our finding highlights that 30 years poplar afforestation on degraded farmland is not enough to change GRSP-related properties. A longer period of afforestation with close-to-nature managements may favor the AMF-related underground recovery processes.

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Section: Introductionmentioning

confidence: 99%

Role and Variation of the Amount and Composition of Glomalin in Soil Properties in Farmland and Adjacent Plantations with Reference to a Primary Forest in North-Eastern China

Wang

et al. 2015

PLoS ONE

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“…In addition, FRI could provide information about the composition (i.e., relative abundance of operationally defined fractions) of FDOM in a relatively short time, comparing with other fractionation techniques that require days to perform (Chow et al, 2005). Fluorescence regional integration has been widely used for many environmental settings to characterize FDOM, including landfill leachates, bioreactors, and drinking water (Wang et al, 2009; Massicotte and Frenette, 2011; He et al, 2011; Wu et al, 2012). The PARAFAC and FRI techniques involve mathematical manipulation on the discrete data in EEMs.…”

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confidence: 99%

Improved Fluorescence Excitation‐Emission Matrix Regional Integration to Quantify Spectra for Fluorescent Dissolved Organic Matter

et al. 2013

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The purpose of this short communication is to demonstrate the importance of numerical analysis and wavelength increment selection when characterizing fluorescent dissolved organic matter (FDOM) using fluorescence excitation-emission matrix (EEM) regional integration. A variety of water samples, representing a landscape gradient and different types of FDOM, were analyzed for their percentage distribution of five operationally defined FDOM fractions (aromatic protein I, aromatic protein II, fulvic acid-like, soluble microbial byproduct-like, and humic acid-like) using three numerical methods in integrating volume under the surface of the fluorescence EEMs: Riemann summation, composite trapezoidal rule, and composite Simpson's rule. The influence of wavelength increment was also examined for the precision of the percentage distribution of each fraction. Our results show that the FDOM fraction estimated by Riemann summation with a 10- or 5-nm excitation wavelength can cause >40% or >5% errors, respectively, when compared with the best estimated values obtained by averaging results from composite trapezoidal rule and composite Simpson's rule with 1-nm excitation wavelength at the same emission increment. Also, our experiments show that fluorescence matrix regional integration could underestimate the two aromatic protein fractions but could overestimate the soluble microbial byproduct-like and humic acid-like fractions if improper increment and integral methods are used. The error can be reduced if a smaller wavelength increment is used. The smallest increment in a spectrofluorometer and composite Simpson's rule should be used for scanning fluorescence EEMs and calculating the percentage distribution of each FDOM fraction. Alternatively, 5-nm wavelength increments with composite Simpson's rule could be cost effective, and the error of each FDOM fraction commonly falls within 5% compared with those estimated by 1-nm increments.

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“…The excitation/emission wavelength of component C3 is 280/335 nm, which represents a protein-like substance (tryptophan) (Chen et al, 2012;He et al, 2011He et al, , 2016. Components C1 and C2 reflect the degree of waste degradation (Wu et al, 2012;Yu et al, 2010) and component C3 represents the biodegradable substrate content (Hudson et al, 2008).…”

Section: Analysis Of Fluorescence Excitationemission Matrix Spectroscopy By the Parallel-factor Methodsmentioning

confidence: 99%

Impact of vent pipe diameter on characteristics of waste degradation in semi-aerobic bioreactor landfill

et al. 2017

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The evolution mechanism of a vent pipe diameter on a waste-stabilization process in semi-aerobic bioreactor landfills was analyzed from the organic-matter concentration, biodegradability, spectral characteristics of dissolved organic matter, correlations and principal-component analysis. Waste samples were collected at different distances from the vent pipe and from different landfill layers in semi-aerobic bioreactor landfills with different vent pipe diameters. An increase in vent pipe diameter favored waste degradation. Waste degradation in landfills can be promoted slightly when the vent pipe diameter increases from 25 to 50 mm. It could be promoted significantly when the vent pipe diameter was increased to 75 mm. The vent pipe diameter is important in waste degradation in the middle layer of landfills. The dissolved organic matter in the waste is composed mainly of long-wave humus (humin), short-wave humus (fulvic acid) and tryptophan. The humification levels of the waste that was located at the center of vent pipes with 25-, 50- and 75-mm diameters were 2.2682, 4.0520 and 7.6419 Raman units, respectively. The appropriate vent pipe diameter for semi-aerobic bioreactor landfills with an 800-mm diameter was 75 mm. The effect of different vent pipe diameters on the degree of waste stabilization is reflected by two main components. Component 1 is related mainly to the content of fulvic acid, biologically degradable material and organic matter. Component 2 is related mainly to the content of tryptophan and humin from the higher vascular plants.

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Fluorescence-based rapid assessment of the biological stability of landfilled municipal solid waste

Cited by 54 publications

References 34 publications

Role and Variation of the Amount and Composition of Glomalin in Soil Properties in Farmland and Adjacent Plantations with Reference to a Primary Forest in North-Eastern China

Role and Variation of the Amount and Composition of Glomalin in Soil Properties in Farmland and Adjacent Plantations with Reference to a Primary Forest in North-Eastern China

Improved Fluorescence Excitation‐Emission Matrix Regional Integration to Quantify Spectra for Fluorescent Dissolved Organic Matter

Impact of vent pipe diameter on characteristics of waste degradation in semi-aerobic bioreactor landfill

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