Environmental forensics of complexly contaminated sites: A complimentary fingerprinting approach

Kruge, Michael A.; Lara-Gonzalo, Azucena; Gallego, José Luis

doi:10.1016/j.envpol.2020.114645

Cited by 16 publications

(4 citation statements)

References 32 publications

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“…For calculating a correct yield, pyrolysis yield of ε-caprolactamwas multiplied by a correction factor of 1.23 which represents (= 139/113, the molar mass ratio of ε-caprolactam to N-vinylcaprolactam). However, this overall yield is lower as reported for poly(vinylpyrrolidone) by Antic et al [19]. However, the pyrolysis yield remains constant by decreasing amounts of pyrolyzed poly(N-vinycaprolactam).…”

Section: Pyrolysis Yieldmentioning

confidence: 54%

“…Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) is a common technique used in polymer science to analyze the chemical composition of polymers. In recent works, Py-GC/MS has been also applied to environmental samples and used to analyze microplastic particles in the environment [17][18][19]. However, the identification and quantification of water-soluble polymers has been rarely reported [20].…”

Section: Introductionmentioning

confidence: 99%

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Determination of the water-soluble polymer poly(N-vinylcaprolactam) in wastewater effluents by continuous-flow off-line pyrolysis-GC/MS

et al. 2022

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High production rates and wide areas of application of water-soluble polymers indicate their potential occurrence in wastewater. Poly(N-vinylcaprolactam) (PNVCL) is such a water-soluble and poorly biodegradable polymer with non-ionic, non-sticky, non-toxic and thermosensitive properties. Its field of applications covers being a constituent in aerosol sprays, pump sprays, and lotions as well as its usage as flocculant in wastewater treatment plants. However, although discharged into sewage treatment plants at high amounts, analytical methods for determining water soluble polymers, in particular PNVCL, in environmental samples are still missing. Therefore, this study aims at developing an efficient analytical method for detecting trace levels of poly(N-vinylcaprolactam) in wastewaters by applying continuous-flow off-line Py-GC/MS for the first time. The approach was based on the identification of specific off-line pyrolysis products (ε-caprolactam, N-vinylcaprolactam) that haven been used in the following for a calibration process that allowed a quantitative determination. An evaluation including specificity, linearity, sensitivity and reproducibility characterized this approach as very suitable for detection of this polymer in complex environmental matrices such as wastewaters. Finally, the transferability has been checked by analyzing a real wastewater from a sewage treatment plant effluent. Here limitations especially due to matrix effects are lowering the sensitivity of the pyrolysis-based method. Nevertheless, a contamination with approx. 70 µg/L of poly(N-vinylcaprolactam) was determined pointing to a huge emission of PNVCL into the aquatic environment and a general high environmental relevance of this synthetic polymer. Noteworthy, this is the first report on the occurrence of poly(N-vinylcaprolactam) in environmental samples.

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Section: Pyrolysis Yieldmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Determination of the water-soluble polymer poly(N-vinylcaprolactam) in wastewater effluents by continuous-flow off-line pyrolysis-GC/MS

et al. 2022

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“…Exploring the Spatiotemporal Distribution Patterns of Pollutants from the Perspective of Climate Change involves utilizing meteorological, remote sensing, atmospheric pollutant concentration, and socio-economic data. Techniques such as Visible [ [205] , [214] , [215] ] and Near-Infrared Reflectance Spectroscopy (VNIR) coupled with Random Forest machine learning (RF) [ 162 ], Support Vector Machine (SVM), and Deep Neural Networks (DNN) [ 163 ] are applied to regional, urban, and neighbourhood environments. This research investigates pollutant distribution characteristics across various spatial and temporal scales, uncovering transmission pathways, rates, and the contributions of different factors.…”

Section: Discussionmentioning

confidence: 99%

Brownfield-related studies in the context of climate change: A comprehensive review and future prospects

Wan,

Chen,

Liu

et al. 2024

Heliyon

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“…As dificuldades em examinar vestígios de solo (normalmente menos de 1 g de amostra) e avaliar os resultados podem resultar na falta de valor do solo como evidência forense. No entanto, os diferentes fatores de formação do solo, como relevo, tempo, organismos, rocha mãe e clima, tornam o solo um material com considerável variabilidade, o que pode ajudar a diferenciar os solos de diferentes locais para auxiliar a Polícia em processos criminais (TIGHE et al, 2018;MELO et al, 2019;ZENG et al, 2020;KRUGE et al, 2020).…”

Section: Referencial Teóricounclassified

Discriminação De Solos Coletados Em Cena De Crime Simulada

Testoni,

Santos da Silva,

Pereira Koltz de Lima

et al. 2023

Ifes Ciência

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Os vestígios do solo são importantes como evidência forense devido ao seu potencial de aderir e transferir em diversos tipos de superfícies de diversos objetos e até mesmo pessoas. Para investigar a potencialidade de técnicas analíticas na discriminação de diferentes solos em Pelotas, Estado do Rio Grande do Sul, Sul do Brasil. Foram realizadas cinco coletas, conforme orientações do Procedimento Operacional Padrão para Coleta de Solos em Locais de Crime, em quatro diferentes locais do município, respeitando os pontos cardeais para abrangê-los de forma representativa de acordo com o tipo de solo, e sob uma perspectiva de crimes simulados nesses locais. Foram utilizadas técnicas analíticas de microscopia eletrônica de varredura (MEV), espectroscopia de raios-X por energia dispersiva (EDS) e espectroscopia de infravermelho por transformada de Fourier tradicional e micro (FTIR µ-FTIR, respectivamente). As análises foram efetuadas às cegas para que não houvesse nenhuma interferência nos resultados finais. Como conclusão das análises e comparação do solo, os resultados suportam a origem do solo em cada uma das áreas coletadas, tornando assim as metodologias empregadas no artigo como úteis e potenciais suportes para a ciência forense.

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Environmental forensics of complexly contaminated sites: A complimentary fingerprinting approach

Cited by 16 publications

References 32 publications

Determination of the water-soluble polymer poly(N-vinylcaprolactam) in wastewater effluents by continuous-flow off-line pyrolysis-GC/MS

Determination of the water-soluble polymer poly(N-vinylcaprolactam) in wastewater effluents by continuous-flow off-line pyrolysis-GC/MS

Brownfield-related studies in the context of climate change: A comprehensive review and future prospects

Discriminação De Solos Coletados Em Cena De Crime Simulada

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