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Reliable identification and quantification of water-soluble synthetic polymers (WSSP), such as polyethyleneimine (PEI), is crucial for understanding their potential impact on certain ecological environments. Therefore, this study proposes an analytical method combining on-line and off-line pyrolysis GC/MS to investigate the pyrolytic degradation. mechanism of branched PEI and develop a calibration method using specific pyrolysis. products, including methylpyrazine, dimethylpyrazine, ethylmethylpyrazine, trimethylpyrazine, methylpropylpyrazine and ethyldimethylpyrazine, for the. quantification of PEI in environmental wastewater samples. The developed analytical. method shows adequate linearity for all molecular ions of the specific pyrolysis. products, with a determination coefficient ranging from 0.95 to 0.98 for the range of 10–500 μg PEI. The limit of quantification for this method lies between 1 and 10 μg/L of PEI. The accuracy (absolute recovery 71–95%) and reproducibility (RSD < 30%) were. evaluated by multiple spiking/recovery experiments at a PEI level of 500 μg. Using this. method for samples collected from different wastewater treatment plants in Germany. reveals a significant emission of PEI to the aquatic environment with concentrations. ranging from 0.08 mg L-1–0.55 mg L-1, and thus demonstrating its applicability in. environmental studies. To the best of our knowledge, this is the first report on the. occurrence of PEI in environmental samples. © 2023 Elsevier B.V.

The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were performed on two selected samples that showed high content of total organic carbon and hydrocarbon generation potential, but also certain variations in sources/depositional environment of organic matter (type I and mixed type I/II kerogen) within previous research of the oil shales sample set. The biomarker signatures were evaluated using gas chromatography-mass spectrometry (GC-MS) and δ13C of individual n-alkanes in bitumen and liquid pyrolysates. The molecular composition of liquid pyrolysates from the OS is very similar to those in initial bitumen, independently on kerogen type, confirming algal origin of organic matter (OM) deposited in lacustrine environment, even more apparently than results of initial bitumen. Therefore, OS can be useful for assessment of source and depositional environment of OM. Pyrolysis in the CS caused more intense thermal alterations, therefore the source fingerprints sometimes notably disappear. The liquid pyrolysates from the CS have the distributions of biomarkers similar to those in crude oils. The biomarker maturity parameters showed slightly higher values in the CS pyrolysate of mixed type I/II kerogen in relation to type I kerogen. δ13C of n-alkanes in liquid pyrolysates from the OS are isotopically lighter in comparison to bitumen, independently on kerogen type. Oppositely, in liquid pyrolysates from the CS, they become heavier than in bitumen, indicating the thermal influence on δ13C signatures, with more pronounced difference for type I kerogen. This is the peer-reviewed version of the following article: Gajica, G.; Šajnović, A.; Stojanović, K.; Schwarzbauer, J.; Kostić, A.; Jovančićević, B. A Comparative Study of the Molecular and Isotopic Composition of Biomarkers in Immature Oil Shale (Aleksinac Deposit, Serbia) and Its Liquid Pyrolysis Products (Open and Closed Systems). Marine and Petroleum Geology 2022, 136, 105383. [https://doi.org/10.1016/j.marpetgeo.2021.105383] Published version: [https://cer.ihtm.bg.ac.rs/handle/123456789/4900]

s & presentations / EGU General Assembly 2021 EGU General Assembly 2021, EGU21, online, 19 Apr 2021 - 30 Apr 2021; G��ttingen : Copernicus Gesellschaft mbH EGU21-1985, 1 Seite (2021). doi:10.5194/egusphere-egu21-1985, Published by Copernicus Gesellschaft mbH, G��ttingen

Water 13(12), 1648 (2021). doi:10.3390/w13121648 special issue: "Special Issue "Microplastics in Water Bodies and in the Environment" / Special Issue Editors: Dr. Hrissi K. Karapanagioti, Guest Editor; Dr. Ioannis K. Kalavrouziotis, Guest Editor", Published by MDPI, Basel

Sedimentology : the journal of the International Association of Sedimentologists (2021). doi:10.1111/sed.12879, Published by Wiley-Blackwell, Oxford

s & presentations : EGU General Assembly 2021 EGU General Assembly 2021, vEGU21, online, 19 Apr 2021 - 30 Apr 2021; G��ttingen : Copernicus Gesellschaft mbH EGU21-14389, 2 Seiten (2021). doi:10.5194/egusphere-egu21-14389, Published by Copernicus Gesellschaft mbH, G��ttingen

Environmental earth sciences 80(8), 314 (2021). doi:10.1007/s12665-021-09531-8, Published by Springer, Berlin ; Heidelberg

The southwest of the Iberian peninsula is, due to its border position between Africa and Europe, a key territory of major geoarchaeological interest, as well as a reservoir of biodiversity and a wildlife refuge area during the Holocene. Bioclimatic conditions have been significantly unstable during this period in the Western Mediterranean. Therefore, further studies are still required to understand how abrupt climate changes such as the 8.2 and 4.2 ka cal BP events impacted societies and environment. In November 2018 the RV Meteor cruise M-152 retrieved 19 vibracores and 4 gravity cores along the Algarve coast after mapping the bathymetry. One of these cores, GeoB23519-01, was taken 65 m below present sea level and recovered 365 cm of sediment. Four potential event layers were identified over the last 11 ka cal BP and, at least two of them, are related to tsunami deposits (ca. 4370 cal BP and AD 1755). This sedimentary archive was analysed in a multi-proxy approach, including palynological and micropalaeontological analyses, which allow characterizing palaeoenvironmental changes along the core. However, considering the characteristics of these deposits, we raise questions about how complex this palynological record is and how it mirrors some short-term events, climate dynamics, and cultural disruptions.

International audience; Chapters: Maintenance and Conservation of Materials in the Built Environment. Nanotechnology in Water Treatment. Biodegradation of Organophosphate and Pyrethroid Pesticides by Microorganims. Non-target UHPLC/MS Analysis of Emerging Contaminants in Water. PAHs Pollution Monitoring by Bivalves. Selenium and its Role in Higher Plants. Aromatic Amines Sources, Environmental Impact and Remediation

International audience; Chapters: Hydrogen Production by Homogeneous Catalysis: Alcohol Acceptorless Dehydrogenation. Photocatalytic Reduction of Carbon Dioxide. Carbon Sequestration in Terrestrial Ecosystems. Selenium Phytoremediation by Giant Reed.Redox Processes in Water Remediation Technologies. Eco-friendly Textile Dyeing Processes

International audience; Chapters: Chlorine for Water Disinfection: Properties, Applications and Health Effects. Greenhouse Gas from Organic Waste Composting: Emissions and Measurement. CO2 Photocatalytic Reduction: Photocatalyst Choice and Product Selectivity. Fluoride in Drinking Water: Health Effects and Remediation. Selenium in Agriculture: Water, Air, Soil, Plants, Food, Animals and Nanoselenium. Biofuels: Bioethanol, Biodiesel, Biogas, Biohydrogen from Plants and Microalgae. Digestion Tests to Measure Heavy Metal Bioavailability in Soils. Biosafety Risk of Genetically Modified Crops Containing Cry Genes. Foundry Air Pollution: Hazards, Measurements and Control. Ligninolytic Enzymes for Water Depollution, Coal Breakdown, and Paper Industry

International audience; Chapters: Biodiesel from Microalgal Oil Extraction. Electrochemistry and Water Pollution. Heterogeneous Photocatalysis for Pharmaceutical Wastewater Treatment. Water Depollution Using Ferrites Photocatalysts. Bioindicators of Toxic Metals. Natural Dyes and Antimicrobials for Textiles. Surfactants in Agriculture. Cheap Materials to Clean Heavy Metal Polluted Waters. Water Quality Monitoring by Aquatic Bryophytes. Halogenated PAH Contamination in Urban Soils

1. School air quality: pollutants, monitoring and toxicity.- 2. Organic contaminants from industrial wastewaters: identification, toxicity and fate in the environment.- 3. Fly ash pollutants, treatment and recycling.- 4. Organotin compounds from snails to humans.- 5. Surfactants: chemistry, toxicity and remediation.- 6. Cadmium, lead, thallium: occurrence, neurotoxicity and histopathological changes of the nervous system.- 7. Lead, arsenic, cadmium, mercury: occurrence, toxicity and diseases.- 8. Plants as monitors of lead air pollution.- 9. Carcinogenic nitrosamines: remediation by zeolites.- 10. Dioxins and furans: sources, impacts and remediation.

International audience; Environmental chemistry is a fast developing science aimed at deciphering fundamental mechanisms ruling the behaviour of pollutants in ecosystems. Applying this knowledge to current environmental issues leads to the remediation of environmental media, and to new, low energy, low emission, sustainable processes. The topics that would be covered in this series, but not limited to, are major achievements of environmental chemistry for sustainable development such as nanotech applications; biofuels, solar and alternative energies; pollutants in air, water, soil and food; greenhouse gases; radioactive pollutants; endocrine disruptors and other pharmaceuticals; pollutant archives; ecotoxicology and health risk; pollutant remediation; geoengineering; green chemistry; contributions bridging unexpectedly far disciplines such as environmental chemistry and social sciences; and participatory research with end-users. The books series will encompass all scientific aspects of environmental chemistry through a multidisciplinary approach: Environmental Engineering/Biotechnology, Waste Management/Waste Technology, Pollution, general, Atmospheric Protection/Air Quality Control/Air Pollution, Analytical Chemistry. Other disciplines include: Agriculture, Building Types and Functions, Climate Change, Ecosystems, Ecotoxicology, Geochemistry, Nanochemistry, Nanotechnology and Microengineering, Social Sciences.

'On-line' pyrolysis coupled with gas chromatography (GC) was performed for quantitative determination of poly(vinylpyrrolidone) (PVP) in wastewater sample. Gas chromatography-mass spectrometry (GC-MS) showed that the main product of pyrolysis of PVP, at high temperatures, was N-vinylpyrrolidone (NVP). After that, different amounts of commercial PVP were pyrolyzed in order to establish the correlation between the amount of generated NVP (its GC peak area) and the initial mass of pyrolyzed PVP. GC-FID analysis was used for construction of the calibration curve and for quantitative determination of PVP. Very good linear correlation was obtained between the area of NVP peak, generated during pyrolysis, and the initial mass of PVP (r2 = 0.998). Further, solutions of known concentration of PVP were prepared in destilled water ('spiked samples'). Spiked samples were preextracted with diethyl ether and n-hexane, after which the water-layer was evaporated and dissolved again in methanol. Analysis of pyrolysates of preextracted spiked samples showed that the 'recovery' of PVP was above 96 mass%. This finding suggested that pre-extraction could be applied to reduce the concentration of organic substances that could also be pyrolyzed, and thus hinder identification and quantitative determination of PVP, without significant loss of polymer. The sample of an industrial wastewater from Pančevo, Serbia was investigated in the last part of this work. The sample was preextracted in the same way as the spiked samples and than pyrolyzed. NVP was identified by GC-MS in obtained pyrolysate, which was the evidence that PVP was present in the wastewater sample. NVP was quantified on the basis of the peak area in GC-FID chromatogram, and than the concentration of PVP in wastewater sample was calculated based on calibration curve. Concentration of PVP in industrial wastewater amounted 2.5 mg/L. U ovom radu je primenjena metoda 'on-line' pirolize u sprezi sa gasnom hromatografijom (GC) za kvantitativno određivanje poli(vinilpirolidona) (PVP) u uzorku otpadne vode. Najpre je gasnomhromatografsko-masenospektrometrijskom analizom (GC-MS) utvrđeno da pirolizom PVP na visokim temperaturama kao glavni proizvod degradacije nastaje monomer, N-vinilpirolidon (NVP). Nakon toga su različite količine komercijalnog PVP pirolizovane da bi se uspostavila korelacija između količine nastalog NVP i inicijalne mase pirolizovanog polimera. Za konstruisanje kalibracione krive i kvantitativno određivanje PVP u rastvorima poznate koncentracije u destilovanoj vodi ('spiked samples'), kao i u uzorku otpadne vode, korišćena je GC analiza. Analizom rastvora komercijalnog PVP poznate koncentracije ustanovljeno je da PVP 'recovery', nakon ekstrakcije n-heksanom i dietil-etrom, iznosi iznad 96 mas.%. U poslednjem delu rada ispitan je uzorak industrijske otpadne vode iz Pančeva, Srbija. Pokazano je da je PVP bio prisutan u otpadnoj vodi i da je njegova koncentracija bila daleko iznad uobičajenih koncentracija niskomolekularnih organskih zagađivača.

The experiment of ex situ soil bioremediation was performed at the locality of the Oil Refinery in Pancevo (alluvial formation of the Danube River, Serbia) polluted with an oil type pollutant. The experiments of biostimulation, bioventilation and reinoculation of an autochthonous microbial consortium were performed during the six-month period (May-November 2006). The changes in the quantity and composition of the pollutant, or the bioremediation effect, were monitored by analysis of the samples of the polluted soil taken in time spans of two weeks. In this way, from the beginning until the end of the experiment, 12 samples were collected and marked as P1-P12 (Pancevo 1-Pancevo 12). The results obtained showed that more significant changes in the composition of the oil pollutant occurred only during the last phases of the experiment (P8-P12). The activity of microorganisms was reflected in the increase of the quantity of polar oil fractions, mainly fatty acid fractions. In this way, the quantity of total eluate increased, and the quantity of the insoluble residue was reduced to a minimum, whereby the oil pollutant was transformed to a form that could be removed more efficiently and more completely from the soil, as a segment of the environment.

The main objective of this study was the development of simple multi-parameter methods for the analyses of biocides in various environmental matrices (wastewater, surface water, and sewage sludge) for measurement and monitoring activities. Eight target substances (triclosan, methyltriclosan (transformation product of triclosan), cybutryne (Irgarol), and the azole fungicides propiconazole, tebuconazole, imazalil, thiabendazole, and cyproconazole) were chosen for determination in selected sample sets. For surface water and wastewater samples a solid-phase extraction (SPE) method and for sewage sludge samples an accelerated solvent extraction (ASE) were developed. The extracts were analyzed by gas chromatographic-mass spectrometric methods (GC/MS), and the analytical methods were checked to ensure sufficient sensitivity by comparing the limits of quantification (LOQs) to the predicted no effect concentrations (PNECs) of the selected biocides. For quality control, recovery rates were determined. Finally, developed methods were checked and validated by application on sample material from various matrices. Sampling took place in seven urban wastewater treatment plants and their corresponding receiving waters. The results revealed that the developed extraction methods are effective and simple and allow the determination of a broad range of biocides in various environmental compartments.

Twenty-five crude oils originating from the Velebit oil field (SE Pannonian Basin), the most important oil field in Serbia, were investigated. Saturated biomarkers (n-alkanes, isoprenoids, steranes and triterpanes) were analyzed by gas chromatography-mass spectrometry (GC-MS). Based on the distribution and abundance of these compounds, a large number of source and maturation parameters were calculated, particularly those most often used in correlation studies of oils. The examined samples were classified according to their origin and level of thermal maturity using factor, cluster and discriminant analyses. According to the source and maturation parameters, combined factor and cluster analyses using the Ward method enabled the categorization of the investigated oils into three groups. The cluster Ward analysis was shown to be of greater susceptibility and reliability. However, in addition to the two aforementioned methods, K-Means cluster analysis and discriminant analysis were shown to be necessary for a more precise and detailed categorization in the case of a large number of samples in one group. Consequently, it was concluded that factor and cluster K-Means and Ward analyses can generally be used for the interpretation of saturated biomarkers in correlation studies of oils, but the observed results have to be checked, i.e., confirmed by discriminant analysis.

International audience; This article is both an essay to propose social chemistry as a new scientific discipline, and a preface of the book Environmental Chemistry for a Sustainable World. Environmental chemistry is a fast emerging discipline aiming at the understanding the fate of pollutants in ecosystems and at designing novel processes that are safe for ecosystems. Past pollution should be cleaned, future pollution should be predicted and avoided (Lichtfouse et al., 2005a). Such advices are still not applied by humans as demonstrated by the Fukushima nuclear event and global warming. Human errors are repeatable. We therefore suggest a possible solution, which involves bridging chemistry and society by integrating social sciences in chemical research. In particular citizen discourse analysis should be useful to design chemicals that are both innovative and accepted by society. Then we present the recent success of environmental chemistry through the foundation of the Association of Chemistry and the Environment; the increase of the impact factor of Environmental Chemistry Letters from 0.814 in 2006 to 2.109 in 2009; and over 35,000 chapter downloads of the book Environmental Chemistry volume 1. Lastly we highlight major topics of the book Environmental Chemistry for a Sustainable World (Lichtfouse et al. 2012a,b). The book presents 23 chapters sorted into two parts: 1. Nanotechnology and Health Risk, and 2. Remediation of Air and Water Pollution.

Several lignite samples were collected from boreholes of the Amynteo opencast lignite mine, northern Greece. Organic geochemical characteristics were investigated with the help of various analytical techniques, comprising Gas Chromatography (GC) and Gas-chromatography-Mass Spectrometry (GC-MS), Fourier Transform Infrared Spectroscopy (FTIR), solid-state Nuclear Magnetic Resonance (NMR) and Electron Paramagnetic Resonance (EPR) spectroscopy, petrographical measurements as well as determination of bulk parameters. In the low rank (Rr = 0.21%) Amynteo lignites, huminite is the most abundant maceral group, inertinite has relatively low percentages and liptinite concentrations are rather high. Carbon Preference Index (CPI) reveals the predominance of odd-numbered, long-chained aliphatic hydro-carbons, which is related to a higher terrestrial plant input. The Pr/Ph ratio suggests that reducing conditions were persistent during peatification. Gymnosperm biomarkers such as isoprimarane, abietane, phyllocladane and sandaracopimarane, as well as angiosperm indicators (lupane) and hopanoid compounds with bacterial origin were identified. Analyses of the aromatic fractions revealed the presence of naphthalene, alkyl benzenes and phenols, pyrene, cadalene, cadinane, fluoranthene and dibenzofurane. Based on the FTIR analysis, aliphatic and oxygen containing structures were prevailed over the aromatic moieties. The intensity of the mineral bands was preferentially increased in the FTIR spectra of insoluble material. According to NMR analysis, the aliphatic carbons (0–50 ppm) have higher proportions comparing to aromatic carbons (100–160 ppm). The aromaticity fraction is low (fa = 0.32), as expected for these low rank coals. The presence of free organic radicals and Fe3+ and Mn2+ paramagnetic ions was revealed by EPR. In summary, the combined application of complementary analytical techniques allowed a deep inside into the geochemical characteristics of Amynteo lignites.

Data interpretation of the Porewater Chemistry (PC) experiment at the Mont Terri Rock Laboratory has led to unexpected observations of anaerobic microbial processes which caused important geochemical perturbations of the Opalinus Clay water in the borehole. The increases of acetate to 146 mg C/L, of DIC to 109 mg C/L and of CH4 to 0.5 mg C/L were unexpected and could not be explained without the presence of a C source in the system. The organic C fuelling the observed microbial activity was until then unknown. Leaching tests were performed on several polymers used for the fabrication of the PC equipment to identify the source of organic matter (OM). Polyethylene (PE) appears to be very inert and does not release detectable concentrations of dissolved organic C (DOC) (

International audience; Environmental Chemistry Letters covers the interfaces of geology, chemistry, physics and biology. Articles published here are of high importance to the study of natural and engineered environments. The journal publishes original and review articles of outstanding significance on such topics as the characterization of natural and affected environments; behavior, prevention, treatment and control of mineral, organic and radioactive pollutants; interfacial studies involving media such as soil, sediment, water, air, organism, and food; green chemistry, environmentally friendly synthetic pathways, and alternative fuels; ecotoxicology and risk assessment; environmental processes and modelling; environmental technologies, remediation and control; environmental analytical chemistry, biomolecular tools and tracers.

International audience; The book presents recent remediation techniques for heavy metal contamination in wastewater, with a focus on recently-developed and sustainable materials such as metal oxides and their composites, two-dimensional materials, organic-inorganic ion exchange materials, nanomaterials, bagasse, and olive-oil waste chelating materials. Chapters also describe the analysis of heavy metals, membranes for water treatment, sources and impact of heavy metals and opportunities and challenges in heavy metal remediation.

International audience; This third volume on environmental nanotechnology includes chapters dealing with topics such nanoremediation, waste water purification, nanosensors, nanomedicine, and nanofiltration. It also highlights the safety aspects and risk assessment and management related to several toxins, as well as nanotechnology related solutions for these challenges. The book also discusses new nanomaterials from the nexus of environment, water, remediation and total environment.