Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in membrane bioreactors: Principles, methods and applications

Yu, Jinlan; Xiao, Kang; Xue, Wenchao; Shen, Yue‐xiao; Tan, Jianwei; Liang, Shuai; Wang, Yanfen; Huang, Xia

doi:10.1007/s11783-019-1210-8

Cited by 120 publications

(37 citation statements)

References 116 publications

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“…C1 (230, 335/400nm) was a component with one emission wavelength (230nm) and two excitation wavelengths (335 nm and 400 Zhu et al, 2018 The uorescence component with lower excitation wavelength (λ Ex < 280nm) was similar to the ultraviolet fulvic acid-like component (230-260/400-500mm). And the component with higher excitation wavelength was similar to the visible fulvic acid-like component (300-370/400-500nm) (Yu et al, 2020).…”

Section: Components and Spectral Characteristics Of Dommentioning

confidence: 77%

Spatiotemporal variations of DOM in a typical multi-source watershed in northern China: A fluorescent evidence

Jin

Lin

Liu

et al. 2021

Preprint

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Dissolved organic matter (DOM) in the multi-source watershed is of guiding significance for the comprehensive management and the assessment of sustainable safety of the watershed. We investigated the components and spectral characteristics of DOM in North Canal River as a typical multi-source watershed in northern China for the first time, using three-dimensional excitation-emission matrix and parallel factor analysis (PARAFAC). The relationship between DOM composition and water quality was also discussed. Results showed that the DOM in the North Canal River watershed was mainly composed of two similar humic acid-like components (230, 335/400nm and 260, 360/450nm) and a tryptophan-like component (280/290 ~ 350nm). The intensity of DOM shows obvious seasonal spatiotemporal variations. In terms of time, the relative concentration of DOM in winter is significantly higher than that in other seasons due to the influence of water volume, temperature, and photochemical degradation factors. As for the aspect of space, under the combined effect of land use and multiple sources of pollution, the relative concentration of tryptophan-like in the mainstream was significantly higher than tributaries, while the relative concentration of humic-like components in the tributaries was higher than that in the mainstream. In the North Canal River watershed, the primary sources of DOM are human-derived point sources and agricultural non-point sources in the mainstream, and terrestrial and microbial sources in the tributaries. Moreover, the composition of DOM is significantly related to water quality indicators, especially nitrogen and phosphorus, which shows that DOM can have an indicative impact on the trophic status in the North Canal River. The result of this study may provide an indicative effect and scientific basis for water quality monitoring and pollution controlling in the North Canal River watershed.

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Section: Components and Spectral Characteristics Of Dommentioning

confidence: 77%

Spatiotemporal variations of DOM in a typical multi-source watershed in northern China: A fluorescent evidence

Jin

Lin

Liu

et al. 2021

Preprint

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“…The fluorescence signals of the permeate were scanned using a fluorescence spectrophotometer (Cary Eclipse, Agilent, Palo Alto, CA, USA) in the 3D mode over the excitation wavelength range of Ex = 200–400 nm and the emission wavelength range of Em = 250–500 nm. The obtained excitation–emission matrix (EEM) spectra were treated according to the following steps [ 33 ]: (a) subtracting pure water background, (b) removing Rayleigh and Raman scatterings, (c) correcting the inner-filter effect using UV–Vis absorbance, and (d) standardizing the fluorescence intensity (FI) into Raman units (R.U.) using the Raman signal of pure water as a reference.…”

Section: Methodsmentioning

confidence: 99%

“…Membranes 2020, 10, x FOR PEER REVIEW 6 of 15 wavelength range of Ex = 200-400 nm and the emission wavelength range of Em = 250-500 nm. The obtained excitation-emission matrix (EEM) spectra were treated according to the following steps [33]:…”

Section: Overview Of Fouling Evolutionmentioning

confidence: 99%

A Simple Method to Identify the Dominant Fouling Mechanisms during Membrane Filtration Based on Piecewise Multiple Linear Regression

Xiao

et al. 2020

Membranes

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Membrane fouling is a complicated issue in microfiltration and ultrafiltration. Clearly identifying the dominant fouling mechanisms during the filtration process is of great significance for the phased and targeted control of fouling. To this end, we propose a semi-empirical multiple linear regression model to describe flux decline, incorporating the five fouling mechanisms (the first and second kinds of standard blocking, complete blocking, intermediate blocking, and cake filtration) based on the additivity of the permeate volume contributed by different coexisting mechanisms. A piecewise fitting protocol was established to distinguish the fouling stages and find the significant mechanisms in each stage. This approach was applied to a case study of a microfiltration membrane filtering a model foulant solution composed of polysaccharide, protein, and humic substances, and the model fitting unequivocally revealed that the dominant fouling mechanism evolved in the sequence of initial adaptation, fast adsorption followed by slow adsorption inside the membrane pores, and the gradual growth of a cake/gel layer on the membrane surface. The results were in good agreement with the permeate properties (total organic carbon, ultraviolet absorbance, and fluorescence) during the filtration process. This modeling approach proves to be simple and reliable for identifying the main fouling mechanisms during membrane filtration with statistical confidence.

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“…HIX provides information on the aromatic degree of the sample. BIX characterizes the maturity of DOM [56]. Thus, the aromatic degree of the system has reduced with reducing SRT.…”

Section: Excitation Emission Matrix Of Extracted Epsmentioning

confidence: 99%

Effects of Solids Retention Time on the Anaerobic Membrane Bioreactor with Yttria-Based Ceramic Membrane Treating Domestic Wastewater at Ambient Temperature

Nilusha

Zhang

et al. 2020

Membranes

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The effects of solid retention times (SRTs) (100 days, 50 days, 25 days) on the performance, microbial community, and membrane fouling of a lab-scale anaerobic yttria-based ceramic membrane bioreactor (AnCMBR) treating synthetic domestic wastewater at ambient temperature (31.2 ± 2.7 °C) were examined. The soluble chemical oxygen demand (SCOD) removal was higher (89.6%) at 25 days SRT compared with 50 days (39.61%) and 100 days (34.3%) SRT. At 100 days SRT, more Bacteroidetes, Firmicutes, and Proteobacteria were present in the microbial community. At 25 days SRT, more Chloroflexi, Synergistetes, and Pastescibacteria emerged, contributing to the stable performance. The SRT of 25 days has resulted in a more stable microbial community compared with 50 days and 100 days SRT. Both bacterial and archaeal community diversities were higher at 25 days SRT, and the specific production of soluble microbial by-products (SMPs) and extracellular polymeric substances (EPSs) were higher at 25 days SRT as well. Consequently, the membrane flux was lower at 25 days SRT with the increased particle size and the enhanced SMPs and EPSs production. Fourier transform infrared spectroscopy analysis (FTIR) and three-dimensional excitation and emission matrix (3D-EEM) analysis showed that protein and SMPs were the major membrane foulants at all SRT stages. In this study, SRT at 25 days was favorable for the stable operation of an AnCMBR treating domestic wastewater at ambient temperature.

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Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in membrane bioreactors: Principles, methods and applications

Cited by 120 publications

References 116 publications

Spatiotemporal variations of DOM in a typical multi-source watershed in northern China: A fluorescent evidence

Spatiotemporal variations of DOM in a typical multi-source watershed in northern China: A fluorescent evidence

A Simple Method to Identify the Dominant Fouling Mechanisms during Membrane Filtration Based on Piecewise Multiple Linear Regression

Effects of Solids Retention Time on the Anaerobic Membrane Bioreactor with Yttria-Based Ceramic Membrane Treating Domestic Wastewater at Ambient Temperature

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