Applications of Raman spectroscopy in detection of water quality

Li, Zhen; Wang, Jinxing; Li, Bingbing

doi:10.1080/05704928.2015.1131711

Cited by 52 publications

(21 citation statements)

References 83 publications

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“…The doublet peaks at 800 and 850 cm –1 were attributed to the off-plane deformation vibration of adsorbed and free NO 3 – . Additionally, the doublet peaks at 1000 and 1040 cm –1 were assigned to the symmetric stretching mode of the adsorbed NO 3 – and itself, while the peaks at 1285 and 1340 cm –1 belonged to the different vibrational modes of NO 2 – . − A minor feature near 970 cm –1 indicated the vibration of SO 4 2– , as sulfuric acid was used to adjust the pH . The active peak vibration illustrated a stronger interaction between the electrode surface and anions under a steady electric field.…”

Section: Resultsmentioning

confidence: 99%

Potential Oscillated Electrochemical Metal Recovery System with Improved Conversion Kinetics and High Levelized Quality

Chen

Zhang

Shan

et al. 2021

Environ. Sci. Technol.

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Electrodeposition, which is an eco-friendly process with high efficiency, is one of the most promising technologies for metal recovery. However, the kinetics are often limited by the polarization and uncontrollable quality of deposits during the electrodeposition process, which restrict the efficiency and controllability of metal recovery. To ameliorate the limitations of the deposition rate and as-formed deposit quality, transient electrodeposition was introduced to control the microinterfacial reaction by regulating the relationship between charge and mass transfer. The Cu2+ removal efficiency and kinetic coefficient during 1 kHz transient electrodeposition were 17.4 and 17.7% higher than those under the conventional steady electric stimulus, respectively. Based on the combined results of X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDS), it was found that the chemical composition of the deposits from transient electrodeposition was more homogenous, as indicated by the low content of metal oxides. The in situ Raman spectra explained the homogenous composition based on the weak interaction of the electrode with the anions during the transient electrodeposition, which was mainly due to the enhanced dehydration under the oscillating or alternating electric field. The potential oscillation induced by the transient electric field also facilitated dehydration, charge transport, and mass transfer, which led to rapid and high-quality metal recovery. Transient electrodeposition will have a great guidance value in the field of metal electroplating and heavy metal recovery from wastewater by electrodeposition.

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Section: Resultsmentioning

confidence: 99%

Potential Oscillated Electrochemical Metal Recovery System with Improved Conversion Kinetics and High Levelized Quality

Chen

Zhang

Shan

et al. 2021

Environ. Sci. Technol.

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“…60 Raman spectroscopy is a minimally invasive tool for detecting water quality and offline characterization of membrane structures and fouling. 61 It enables detection of various molecular-level objects, such as qualification of functional groups, hydrogen bonding, orientation of polymeric chains, and the morphology-membrane transport relationship. 23,62 The commonly used Raman-based techniques include spontaneous Raman, surface-enhanced Raman spectroscopy (SERS), tip-enhanced Raman spectroscopy, resonance Raman, and coherent Raman scattering.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Molecular Spectroscopic Characterization of Membrane Fouling: A Critical Review

Chen

Qian

Zhou

et al. 2018

Chem

104

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Membrane technologies have attracted growing interest in the fields of water purification and energy recovery. Membrane fouling is the bottleneck that limits the wide application of membrane-based technologies. Exploration of the fouling mechanism and the chemical composition, structure, and functions of foulants and their changes in the membrane filtration process is therefore of significant importance. Molecular spectroscopic methods are among the most efficient platform tools for characterizing membrane fouling because of their unique advantages, such as chemical identification at the molecular level, high sensitivity, and spatially temporally resolved feasibility. Here, an overview of spectroscopic and microspectroscopic approaches, including UV-vis, fluorescence, infrared, and Raman spectroscopy, for the online detection, identification, visualization, and chemical characterization of membrane fouling is provided, and their main advantages as well as limitations in membrane-fouling research are analyzed. Furthermore, future possibilities and challenges for the development of molecular spectroscopy for membrane-fouling characterization are envisaged in this critical review.

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“…In this way, spectroscopy has been used for the study of atomic structure through the determination of emission and absorption spectra, the analysis of chemical structures, the investigation of chemical equilibrium and the kinetics of chemical reactions [1,2]. Spectroscopy has found applications in environmental analysis to determine the acidity of water or the presence of metallic compounds in a sample [3,4], in medicine has been used for diagnostic and therapeutic applications as well as for pharmaceutical analysis [5,6], and in astronomy has been used, both long ago and nowadays, to determine the chemical composition of stars or planets [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Using homemade spectrometers to perform accurate measurements of discrete and continuous spectra

Castellannos¹,

Castellanos²,

Alvarez-Salazar³

2022

Preprint

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Homemade spectrometers are commonly used tools to analyze light sources and determine its physical characteristics. We perform an assessment of homemade spectrometers in terms of spectral resolution and accuracy in the determination of intensity, through the comparison of results with a spectroscope commonly used in the physics and chemistry labs. We found that the homemade spectrometer used is sufficiently accurate in wavelength, and can be used by undergraduate students to perform precise measurements as, for example, the spectrum of the Sun, leading to the determination of its temperature.

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Applications of Raman spectroscopy in detection of water quality

Cited by 52 publications

References 83 publications

Potential Oscillated Electrochemical Metal Recovery System with Improved Conversion Kinetics and High Levelized Quality

Potential Oscillated Electrochemical Metal Recovery System with Improved Conversion Kinetics and High Levelized Quality

Molecular Spectroscopic Characterization of Membrane Fouling: A Critical Review

Using homemade spectrometers to perform accurate measurements of discrete and continuous spectra

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