"IR Versus Raman - The Advantages and Disadvantages". Infrared Spectroscopy is also a non-destructive spectroscopic technique that provides a molecular fingerprint but was discovered a long time before the principles of Raman spectroscopy.

The problems raised by the elimination of this sludge are generally underestimated or poorly taken into account when wastewater plants are designed. The purpose of the pinhole test for vision, Difference Between Colorimeter & Spectrophotometer, Raman: Pros and Cons of Raman Spectroscopy. Disadvantages include sometimes difficult handling procedures and maintenance of the sample cells.

Jun 1, 2018. Several other forms of mechanical sight can detect particles through other spectra, but many of their methods use radiation.
Free lipids were removed before extraction of HSs using a 2:1 chloroform–methanol mixture as mentioned by Amir et al. Brief introduction to this section that descibes Open Access especially from an IntechOpen perspective, Want to get in touch?

Advantages and Limitations of Using FTIR Spectroscopy for Assessing the Maturity of Sewage Sludge and Olive Oil Waste Co-composts, Biodegradation and Bioremediation of Polluted Systems - New Advances and Technologies, Rolando Chamy, Francisca Rosenkranz and Lorena Soler, IntechOpen, DOI: 10.5772/60943. He holds a bachelor's degree in criminal justice from Indiana University, and resides in Northwest Indiana. IR can be used to give an indication of ionic character, whereas Raman will give an indication of covalent character. [29], and Kaiser and Ellerbrock [30], in the case of HS, HA, and FA extracted from composts, even after purification, there often remains a relatively large portion of organic compounds such as cellulose, lignin, hemicellulose [15], or mineral (silicates or clays) presenting bands that overlap with those of HS compounds, i.e., in the 1200–1000-cm–1 region [28, 30]. The FTIR spectrum of a given co-compost is the result of the contribution of different components of the raw material that constitutes it, such as cellulose, hemicellulose, and lignin. In order to highlight the contribution of each component to the spectrum, we performed FTIR spectrum analysis, taking into account the bands of the starting raw material that may be incorporated and not degraded at the end of the process.

It’s based on principles of collaboration, unobstructed discovery, and, most importantly, scientific progression. Some tests may require a subject to be bathed in radiation or have radioactive dye put into it, but infrared spectroscopy doesn't require that. How does infrared spectroscopy aid in criminal investigations? The stability and maturity are among the main characteristics of composts. The use of both techniques gives scientists a fuller picture about their analytes of interest. We are IntechOpen, the world's leading publisher of Open Access books.

In contrast, during incomplete transformations as in composts, the FTIR spectra recorded at different stages of humification contain both characteristic bands of the products formed and these of the starting reagents which are not completely consumed. These shifts can be used as a maturity index of the compost.

The 3000–2800-cm–1 region reflects the hydrophobic properties of the aliphatic organic matter.

Open Access is an initiative that aims to make scientific research freely available to all. The uncertainty in band frequencies is estimated to ±1 cm–1. © 2015 The Author(s). 2019. Whilst IR and Raman have both advantages and disadvantages, many scientists believe that they should still be used to complement each other when trying to identify unknown substances. This spectroscopy gives better signal to noise ratio compared to the dispersive instrument. Licensee IntechOpen. Olive mills produce large amounts of solid waste, around 70,000 tons year–1, which serves for combustion, and olive mill wastewater reaching about 640,000 tons year–1. All rights reserved.
FTIR characteristics of extracted humic substance and fulvic acid for different times of composting of sludge, green waste, and olive oil mill waste [11*, 9**, 20***]. |, Bioequivalence Studies to Aid FDA Approval, Container Closure Integrity Testing (CCIT), Foreign Particulate & Contamination Analysis, Glass Delamination Analysis – Testing Interactions in Drug Products, Particle Size Distribution in Drug Products, Particle Sizing, Counting, And Identification for Pharmaceutical Products.

The best thing about infrared spectroscopy is its ability to confirm the presence of functional groups. The comparison of the FTIR spectrum obtained from HA extracted from uncomposted sludge after lipid removal, lipid-free HA (LFHA), or without lipid removal (HA0) shows the same profiles with shift frequencies (Table 4). To overcome these risks, treatment is necessary to reduce and eliminate adverse effects and to maximize the effectiveness of the materials once applied to the soil. 13 November 2020. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. Whilst both instruments can be used for the analysis of light colored samples, IR is used alone for fluorescent and colored samples, but Raman is used for aqueous samples and translucent containers. Our spectra show that the presence of the lipid fraction provokes band shifts toward lower frequencies. It is necessary to know the nature, composition, and the starting raw material structure to distinguish the bands of the HS formed. Some tests may require a subject to be bathed in radiation or have radioactive dye put into it, but infrared spectroscopy doesn't require that.

They're real people. In our research, the infrared spectra (FTIR) recorded on different composts and their HA and FA fractions show the changes occurring toward the end of the humification. In parallel, we found that the bands located at 3420 and 1655 cm–1 gradually shift to around 3400 and 1640 cm–1, respectively, at the end of composting. Observed wave numbers and intensities of bands at these regions of spectrum vary from one bibliographic reference to another, and various attributions have been put forward: The broad and intense asymmetric bands appearing at 3450–3280 cm–1 were attributed to the elongation of vibrations of OH linked by hydrogen bonding and NH groups of HA extracted from a soil or sewage sludge [24, 31, 32, 33]. We are a community of more than 103,000 authors and editors from 3,291 institutions spanning 160 countries, including Nobel Prize winners and some of the world’s most-cited researchers. The possibilities of sludge evacuation are limited and are subjected to various technical, economic, legal, and environmental constraints. In this article, AZoOptics spoke to Brinell Vision about their infrared filters and how they are being used in astronomy and climate monitoring. Fourier transform infrared spectroscopy (FTIR) is currently one of the most important analytical techniques available to analyze various substrates. What does infrared spectrum show in an IR? To provide aerobic conditions, the mixtures were mechanically turned each week. Raman spectroscopy is a much more expensive technique to use than IR since high powered lasers and amplification sources are needed to get sensitive results. One of the greatest advantages of this technique is that virtually any sample in any state may be analyzed. IR Versus Raman - The Advantages and Disadvantages. Activated sludge taken from the wastewater aerobic treatment plant of Khouribga (Morocco) (66%) mixed with (34%) of fresh plant matter for 130 days [39]. The high levels of phenol monomers and polymers lead to chemical oxygen demand (COD) and biological oxygen demand (BOD) about 200–400 times higher than those of typical municipal sewage. These have included Fourier Transform (FT)-Raman, dispersive visible Raman, chiral Raman, UV resonance enhanced Raman, surface enhanced Raman, confocal Raman microscopy, as well as the development of handheld instrumentation. Raman spectroscopy works by the detection of inelastic scattering, also known as Raman scattering, of monochromatic light from a laser, usually in visible, near infrared or near ultraviolet range.

It has been around since the discovery of Raman Scattering in 1928, but over the past 20 years, the amount of Raman techniques available has greatly increased.

At the end of the humification process, the band located around 3450–3420 cm–1 is shifted to lower wave numbers by around Δν = 10 cm–1. However, the liquid is sent directly into the sewer systems, stored in evaporation lagoons, or illegally spread on the land [1].


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