Monitoring biological wastewater treatment processes: recent advances in spectroscopy applications

Mesquita, D. P.; Quintelas, C.; Amaral, A. L.; Ferreira, Eugénio C.

doi:10.1007/s11157-017-9439-9

Cited by 57 publications

(24 citation statements)

References 188 publications

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“…Despite multiple indications in the literature that fluorescence sensors can be used for in situ measurements of wastewater treatment processes (Carstea et al, 2016;Chong et al, 2013;Mesquita et al, 2017), only two studies have been published so far (Carstea et al, 2018;Mladenov et al, 2018). The main reason for the slow advancement is the difficulty of using this technique in the hostile environment of a wastewater treatment plant (i.e.…”

Section: Engineered Water Systemsmentioning

confidence: 99%

In situ fluorescence measurements of dissolved organic matter: A review

Cârstea

Popa

Baker

et al. 2020

Science of The Total Environment

116

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There is a need for an inexpensive, reliable and fast monitoring tool to detect contaminants in a short time, for quick mitigation of pollution sources and site remediation, and for characterisation of natural dissolved organic matter (DOM). Fluorescence spectroscopy has proven to be an excellent technique in quantifying aquatic DOM, from autochthonous, allochthonous or anthropogenic sources. This paper reviews the advances in in situ fluorescence measurements of DOM and pollutants in various water environments. Studies have demonstrated, using high temporal-frequency DOM fluorescence data, that marine autochthonous production of DOM is highly complex and that the allochthonous input of DOM from freshwater to marine water can be predicted. Furthermore, river measurement studies found a delayed fluorescence response of DOM following precipitation compared to turbidity and discharge, with various lags, depending on season, site and input of dissolved organic carbon (DOC) concentration. In addition, research has shown that blue light fluorescence (emission = 430-500 nm) can be a good proxy for DOC, in environments with terrestrial inputs, and ultraviolet fluorescence (emission = UVA-320-400 nm) for biochemical oxygen demand, and also E. coli in environments with sanitation issues. The correction of raw fluorescence data improves the relationship between fluorescence intensity and these parameters. This review also presents the specific steps and parameters that must be considered before and 2 during in situ fluorescence measurement session for a harmonised qualitative and quantitative protocol. Finally, the strengths and weaknesses of the research on in situ fluorescence are identified.

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Section: Engineered Water Systemsmentioning

confidence: 99%

In situ fluorescence measurements of dissolved organic matter: A review

Cârstea

Popa

Baker

et al. 2020

Science of The Total Environment

116

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“…Nowadays, FTIR techniques are becoming widespread in monitoring wastewater treatment processes. Several parameters can be measured with this technique as alcohols and volatile organic acids (Nespeca et al, 2017), biogas production (Stockl and Lichti, 2018), biochemical oxygen demand, chemical oxygen demand (COD), turbidity, total organic carbon (TOC) and volatile fatty acids (VFA), among others (Mesquita et al, 2017). On the other hand, the quantification of pharmaceuticals, and other emerging pollutants, in wastewaters by FTIR and chemometrics is just starting to have the attention of the scientific community (Quintelas et al, 2019).…”

Section: Remarks and Perspectivementioning

confidence: 99%

Environmentally-friendly technology for rapid identification and quantification of emerging pollutants from wastewater using infrared spectroscopy

Quintelas

Melo

Costa

et al. 2020

Environmental Toxicology and Pharmacology

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The monitoring of emerging pollutants in wastewaters is nowadays an issue of special concern, with the classical quantification methods being time and reagent consuming. In this sense, a FTIR transmission spectroscopy based chemometric methodology was developed for the determination of eight of these pollutants. A total of 456 samples were, therefore, obtained, from an activated sludge wastewater treatment process spiked with the studied pollutants, and analysed in the range of 200 cm −1 to 14,000 cm −1. Then, a k-nearest neighbour (kNN) analysis aiming at identifying each sample pollutant was employed. Next, partial least squares (PLS) and ordinary least squares (OLS) modelling approaches were employed in order to obtain suitable prediction models. This procedure resulted in good prediction abilities regarding the estimation of atrazine, desloratadine, paracetamol, β-estradiol, ibuprofen, carbamazepine, sulfamethoxazole and ethynylestradiol concentrations in wastewaters. These promising results suggest this technology as a fast, eco-friendly and reagent free alternative methodology for the quantification of emerging pollutants in wastewaters.

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“…FT-NIR techniques are also frequently used to monitor wastewater treatment processes. The parameters usually evaluated by this technique include polyhydroxyalkanoates, extracellular polymeric substances, biochemical oxygen demand, chemical oxygen demand, total suspended solids, total organic and inorganic carbon, bicarbonate alkalinity, biochemical methane potential, volatile fatty acids, nitrate, ammonia [19] and volatile organic pollutants as tetrachloroethylene and dichlorobenzene ( [20,21]) and fenitrothion [22]. However, the quantification of pharmaceuticals in wastewaters by FT-NIR is a field to explore and, to the authors' knowledge, no relevant works exist in the literature describing the use of this technique at this level.…”

Section: Samples Calibrationmentioning

confidence: 99%

Quantification of pharmaceutical compounds in wastewater samples by near infrared spectroscopy (NIR)

Quintelas

Mesquita

Ferreira

et al. 2019

Talanta

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The quantification of pollutants, as pharmaceuticals, in wastewater is an issue of special concern. Usually, typical methods to quantify these products are time and reagent consuming. This paper describes the development and validation of a Fourier transform near-infrared (FT-NIR) spectroscopy methodology for the quantification of pharmaceuticals in wastewaters. For this purpose, 276 samples obtained from an activated sludge wastewater treatment process were analysed in the range of 200 cm −1 to 14,000 cm −1 , and further treated by chemometric techniques to develop and validate the quantification models. The obtained results were found adequate for the prediction of ibuprofen, sulfamethoxazole, 17β-estradiol and carbamazepine with coefficients of determination (R 2) around 0.95 and residual prediction deviation (RPD) values above four, for the overall (training and validation) data points. These results are very promising and confirm that this technology can be seen as an alternative for the quantification of pharmaceuticals in wastewater.

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Monitoring biological wastewater treatment processes: recent advances in spectroscopy applications

Cited by 57 publications

References 188 publications

In situ fluorescence measurements of dissolved organic matter: A review

In situ fluorescence measurements of dissolved organic matter: A review

Environmentally-friendly technology for rapid identification and quantification of emerging pollutants from wastewater using infrared spectroscopy

Quantification of pharmaceutical compounds in wastewater samples by near infrared spectroscopy (NIR)

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