TY - JOUR
T1 - Excitation-emission matrix (EEM) fluorescence spectroscopy for characterization of organic matter in membrane bioreactors
T2 - Principles, methods and applications
AU - Yu, Jinlan
AU - Xiao, Kang
AU - Xue, Wenchao
AU - Shen, Yue xiao
AU - Tan, Jihua
AU - Liang, Shuai
AU - Wang, Yanfen
AU - Huang, Xia
N1 - Publisher Copyright:
© 2020, Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - The membrane bioreactor (MBR) technology is a rising star for wastewater treatment. The pollutant elimination and membrane fouling performances of MBRs are essentially related to the dissolved organic matter (DOM) in the system. Three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy, a powerful tool for the rapid and sensitive characterization of DOM, has been extensively applied in MBR studies; however, only a limited portion of the EEM fingerprinting information was utilized. This paper revisits the principles and methods of fluorescence EEM, and reviews the recent progress in applying EEM to characterize DOM in MBR studies. We systematically introduced the information extracted from EEM by considering the fluorescence peak location/ intensity, wavelength regional distribution, and spectral deconvolution (giving fluorescent component loadings/scores), and discussed how to use the information to interpret the chemical compositions, physiochemical properties, biological activities, membrane retention/fouling behaviors, and migration/ transformation fates of DOM in MBR systems. In addition to conventional EEM indicators, novel fluorescent parameters are summarized for potential use, including quantum yield, Stokes shift, excited energy state, and fluorescence lifetime. The current limitations of EEM-based DOM characterization are also discussed, with possible measures proposed to improve applications in MBR monitoring. [Figure not available: see fulltext.].
AB - The membrane bioreactor (MBR) technology is a rising star for wastewater treatment. The pollutant elimination and membrane fouling performances of MBRs are essentially related to the dissolved organic matter (DOM) in the system. Three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy, a powerful tool for the rapid and sensitive characterization of DOM, has been extensively applied in MBR studies; however, only a limited portion of the EEM fingerprinting information was utilized. This paper revisits the principles and methods of fluorescence EEM, and reviews the recent progress in applying EEM to characterize DOM in MBR studies. We systematically introduced the information extracted from EEM by considering the fluorescence peak location/ intensity, wavelength regional distribution, and spectral deconvolution (giving fluorescent component loadings/scores), and discussed how to use the information to interpret the chemical compositions, physiochemical properties, biological activities, membrane retention/fouling behaviors, and migration/ transformation fates of DOM in MBR systems. In addition to conventional EEM indicators, novel fluorescent parameters are summarized for potential use, including quantum yield, Stokes shift, excited energy state, and fluorescence lifetime. The current limitations of EEM-based DOM characterization are also discussed, with possible measures proposed to improve applications in MBR monitoring. [Figure not available: see fulltext.].
KW - characterization method
KW - dissolved organic matter (DOM)
KW - excitation-emission matrix (EEM)
KW - fluorescence indicator
KW - membrane bioreactor (MBR)
UR - http://www.scopus.com/inward/record.url?scp=85077856753&partnerID=8YFLogxK
U2 - 10.1007/s11783-019-1210-8
DO - 10.1007/s11783-019-1210-8
M3 - Review article
AN - SCOPUS:85077856753
SN - 2095-2201
VL - 14
JO - Frontiers of Environmental Science and Engineering
JF - Frontiers of Environmental Science and Engineering
IS - 2
M1 - 31
ER -